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Merge branch 'i2c/for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Browse Source 
Pull i2c updates from Wolfram Sang:
 "i2c core:

   - huge improvements and refactorizations of the Linux I2C
     documentation (lots of thanks to Luca for doing it and Jean for the
     careful review)

   - subsystem wide API conversion to i2c_new_client_device()

   - remove obsolete parport-light driver

   - smaller core updates (removal of 'extern', enabling more compile
     testing, use more helper macros)

   - and quite a bunch of driver updates (new IDs, simplifications,
     better PM, support of atomic transfers and other improvements)

  i2c-mux:

   - The main feature is the idle-state rework of the pca954x driver
     from Biwen Li

  at24 driver:

   - minor maintenance: update the license tag, sort headers

   - move support for the write-protect pin into nvmem core

   - add a reference to the new wp-gpios property in nvmem to at25
     bindings

   - add support for regulator and pm_runtime control"

* 'i2c/for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (91 commits)
  i2c: cros-ec-tunnel: Fix ACPI identifier
  i2c: cros-ec-tunnel: Fix slave device enumeration
  i2c: stm32f7: add PM_SLEEP suspend/resume support
  i2c: cadence: Fix wording in i2c-cadence driver
  i2c: cadence: Fix power management order of operations
  i2c: cadence: Fix error printing in case of defer
  i2c: cadence: Handle transfer_size rollover
  i2c: i801: Add support for Intel Comet Lake PCH-V
  docs: i2c: writing-clients: properly name the stop condition
  docs: i2c: i2c-protocol: use same wording as smbus-protocol
  docs: i2c: rename sections so the overall picture is clearer
  docs: i2c: old-module-parameters: use monospace instead of ""
  docs: i2c: old-module-parameters: clarify this is for obsolete kernels
  docs: i2c: old-module-parameters: fix internal hyperlink
  docs: i2c: instantiating-devices: use monospace for sysfs attributes
  docs: i2c: instantiating-devices: rearrange static instatiation
  docs: i2c: instantiating-devices: fix internal hyperlink
  docs: i2c: smbus-protocol: improve I2C Block transactions description
  docs: i2c: smbus-protocol: fix punctuation
  docs: i2c: smbus-protocol: fix typo
  ...
This commit is contained in:
Linus Torvalds
2020-02-07 12:54:13 -08:00
parent ed39ba0ec1 b49f8e0e7b
commit 11777ee8b0
57 changed files with 2581 additions and 1111 deletions
Download Patch File Download Diff File Expand all files Collapse all files

107
drivers/i2c/busses/Kconfig
View File

@@ -367,7 +367,8 @@ comment "I2C system bus drivers (mostly embedded / system-on-chip)"
config I2C_ALTERA
tristate "Altera Soft IP I2C"
depends on (ARCH_SOCFPGA || NIOS2) && OF
depends on ARCH_SOCFPGA || NIOS2 || COMPILE_TEST
depends on OF
help
If you say yes to this option, support will be included for the
Altera Soft IP I2C interfaces on SoCFPGA and Nios2 architectures.
@@ -387,7 +388,7 @@ config I2C_ASPEED
config I2C_AT91
tristate "Atmel AT91 I2C Two-Wire interface (TWI)"
depends on ARCH_AT91
depends on ARCH_AT91 || COMPILE_TEST
help
This supports the use of the I2C interface on Atmel AT91
processors.
@@ -440,7 +441,8 @@ config I2C_AXXIA
config I2C_BCM2835
tristate "Broadcom BCM2835 I2C controller"
depends on ARCH_BCM2835 || ARCH_BRCMSTB
depends on ARCH_BCM2835 || ARCH_BRCMSTB || COMPILE_TEST
depends on COMMON_CLK
help
If you say yes to this option, support will be included for the
BCM2835 I2C controller.
@@ -463,8 +465,8 @@ config I2C_BCM_IPROC
config I2C_BCM_KONA
tristate "BCM Kona I2C adapter"
depends on ARCH_BCM_MOBILE
default y
depends on ARCH_BCM_MOBILE || COMPILE_TEST
default y if ARCH_BCM_MOBILE
help
If you say yes to this option, support will be included for the
I2C interface on the Broadcom Kona family of processors.
@@ -511,7 +513,7 @@ config I2C_CPM
config I2C_DAVINCI
tristate "DaVinci I2C driver"
depends on ARCH_DAVINCI || ARCH_KEYSTONE
depends on ARCH_DAVINCI || ARCH_KEYSTONE || COMPILE_TEST
help
Support for TI DaVinci I2C controller driver.
@@ -572,7 +574,7 @@ config I2C_DESIGNWARE_BAYTRAIL
config I2C_DIGICOLOR
tristate "Conexant Digicolor I2C driver"
depends on ARCH_DIGICOLOR
depends on ARCH_DIGICOLOR || COMPILE_TEST
help
Support for Conexant Digicolor SoCs (CX92755) I2C controller driver.
@@ -610,11 +612,12 @@ config I2C_EMEV2
I2C interface on the Renesas Electronics EM/EV family of processors.
config I2C_EXYNOS5
tristate "Exynos5 high-speed I2C driver"
depends on ARCH_EXYNOS && OF
default y
tristate "Exynos high-speed I2C driver"
depends on OF
depends on ARCH_EXYNOS || COMPILE_TEST
default y if ARCH_EXYNOS
help
High-speed I2C controller on Exynos5 based Samsung SoCs.
High-speed I2C controller on Exynos5 and newer Samsung SoCs.
config I2C_GPIO
tristate "GPIO-based bitbanging I2C"
@@ -634,7 +637,7 @@ config I2C_GPIO_FAULT_INJECTOR
config I2C_HIGHLANDER
tristate "Highlander FPGA SMBus interface"
depends on SH_HIGHLANDER
depends on SH_HIGHLANDER || COMPILE_TEST
help
If you say yes to this option, support will be included for
the SMBus interface located in the FPGA on various Highlander
@@ -686,7 +689,7 @@ config I2C_IMX_LPI2C
config I2C_IOP3XX
tristate "Intel IOPx3xx and IXP4xx on-chip I2C interface"
depends on ARCH_IOP32X || ARCH_IXP4XX
depends on ARCH_IOP32X || ARCH_IXP4XX || COMPILE_TEST
help
Say Y here if you want to use the IIC bus controller on
the Intel IOPx3xx I/O Processors or IXP4xx Network Processors.
@@ -726,6 +729,7 @@ config I2C_LPC2K
config I2C_MESON
tristate "Amlogic Meson I2C controller"
depends on ARCH_MESON || COMPILE_TEST
depends on COMMON_CLK
help
If you say yes to this option, support will be included for the
I2C interface on the Amlogic Meson family of SoCs.
@@ -759,7 +763,7 @@ config I2C_MT7621
config I2C_MV64XXX
tristate "Marvell mv64xxx I2C Controller"
depends on MV64X60 || PLAT_ORION || ARCH_SUNXI || ARCH_MVEBU
depends on MV64X60 || PLAT_ORION || ARCH_SUNXI || ARCH_MVEBU || COMPILE_TEST
help
If you say yes to this option, support will be included for the
built-in I2C interface on the Marvell 64xxx line of host bridges.
@@ -770,7 +774,7 @@ config I2C_MV64XXX
config I2C_MXS
tristate "Freescale i.MX28 I2C interface"
depends on SOC_IMX28
depends on SOC_IMX28 || COMPILE_TEST
select STMP_DEVICE
help
Say Y here if you want to use the I2C bus controller on
@@ -799,7 +803,7 @@ config I2C_OCORES
config I2C_OMAP
tristate "OMAP I2C adapter"
depends on ARCH_OMAP || ARCH_K3
depends on ARCH_OMAP || ARCH_K3 || COMPILE_TEST
default y if MACH_OMAP_H3 || MACH_OMAP_OSK
help
If you say yes to this option, support will be included for the
@@ -833,7 +837,7 @@ config I2C_PCA_PLATFORM
config I2C_PMCMSP
tristate "PMC MSP I2C TWI Controller"
depends on PMC_MSP
depends on PMC_MSP || COMPILE_TEST
help
This driver supports the PMC TWI controller on MSP devices.
@@ -842,7 +846,7 @@ config I2C_PMCMSP
config I2C_PNX
tristate "I2C bus support for Philips PNX and NXP LPC targets"
depends on ARCH_LPC32XX
depends on ARCH_LPC32XX || COMPILE_TEST
help
This driver supports the Philips IP3204 I2C IP block master and/or
slave controller
@@ -863,7 +867,7 @@ config I2C_PUV3
config I2C_PXA
tristate "Intel PXA2XX I2C adapter"
depends on ARCH_PXA || ARCH_MMP || ARCH_MVEBU || (X86_32 && PCI && OF)
depends on ARCH_PXA || ARCH_MMP || ARCH_MVEBU || (X86_32 && PCI && OF) || COMPILE_TEST
help
If you have devices in the PXA I2C bus, say yes to this option.
This driver can also be built as a module. If so, the module
@@ -932,11 +936,11 @@ config HAVE_S3C2410_I2C
respective Kconfig file.
config I2C_S3C2410
tristate "S3C2410 I2C Driver"
depends on HAVE_S3C2410_I2C
tristate "S3C/Exynos I2C Driver"
depends on HAVE_S3C2410_I2C || COMPILE_TEST
help
Say Y here to include support for I2C controller in the
Samsung SoCs.
Samsung SoCs (S3C, S5Pv210, Exynos).
config I2C_SH7760
tristate "Renesas SH7760 I2C Controller"
@@ -971,7 +975,7 @@ config I2C_SIMTEC
config I2C_SIRF
tristate "CSR SiRFprimaII I2C interface"
depends on ARCH_SIRF
depends on ARCH_SIRF || COMPILE_TEST
help
If you say yes to this option, support will be included for the
CSR SiRFprimaII I2C interface.
@@ -981,14 +985,14 @@ config I2C_SIRF
config I2C_SPRD
tristate "Spreadtrum I2C interface"
depends on I2C=y && ARCH_SPRD
depends on I2C=y && (ARCH_SPRD || COMPILE_TEST)
help
If you say yes to this option, support will be included for the
Spreadtrum I2C interface.
config I2C_ST
tristate "STMicroelectronics SSC I2C support"
depends on ARCH_STI
depends on ARCH_STI || COMPILE_TEST
help
Enable this option to add support for STMicroelectronics SoCs
hardware SSC (Synchronous Serial Controller) as an I2C controller.
@@ -1019,7 +1023,7 @@ config I2C_STM32F7
config I2C_STU300
tristate "ST Microelectronics DDC I2C interface"
depends on MACH_U300
depends on MACH_U300 || COMPILE_TEST
default y if MACH_U300
help
If you say yes to this option, support will be included for the
@@ -1055,15 +1059,16 @@ config I2C_SYNQUACER
config I2C_TEGRA
tristate "NVIDIA Tegra internal I2C controller"
depends on ARCH_TEGRA
depends on ARCH_TEGRA || (COMPILE_TEST && (ARC || ARM || ARM64 || M68K || RISCV || SUPERH || SPARC))
# COMPILE_TEST needs architectures with readsX()/writesX() primitives
help
If you say yes to this option, support will be included for the
I2C controller embedded in NVIDIA Tegra SOCs
config I2C_TEGRA_BPMP
tristate "NVIDIA Tegra BPMP I2C controller"
depends on TEGRA_BPMP
default y
depends on TEGRA_BPMP || COMPILE_TEST
default y if TEGRA_BPMP
help
If you say yes to this option, support will be included for the I2C
controller embedded in NVIDIA Tegra SoCs accessed via the BPMP.
@@ -1101,7 +1106,7 @@ config I2C_VERSATILE
config I2C_WMT
tristate "Wondermedia WM8xxx SoC I2C bus support"
depends on ARCH_VT8500
depends on ARCH_VT8500 || COMPILE_TEST
help
Say yes if you want to support the I2C bus on Wondermedia 8xxx-series
SoCs.
@@ -1142,7 +1147,7 @@ config I2C_XILINX
config I2C_XLR
tristate "Netlogic XLR and Sigma Designs I2C support"
depends on CPU_XLR || ARCH_TANGO
depends on CPU_XLR || ARCH_TANGO || COMPILE_TEST
help
This driver enables support for the on-chip I2C interface of
the Netlogic XLR/XLS MIPS processors and Sigma Designs SOCs.
@@ -1202,46 +1207,12 @@ config I2C_PARPORT
This supports parallel port I2C adapters such as the ones made by
Philips or Velleman, Analog Devices evaluation boards, and more.
Basically any adapter using the parallel port as an I2C bus with
no extra chipset is supported by this driver, or could be.
This driver is a replacement for (and was inspired by) an older
driver named i2c-philips-par. The new driver supports more devices,
and makes it easier to add support for new devices.
An adapter type parameter is now mandatory. Please read the file
Documentation/i2c/busses/i2c-parport.rst for details.
Another driver exists, named i2c-parport-light, which doesn't depend
on the parport driver. This is meant for embedded systems. Don't say
Y here if you intend to say Y or M there.
no extra chipset is supported by this driver, or could be. Please
read the file Documentation/i2c/busses/i2c-parport.rst for details.
This support is also available as a module. If so, the module
will be called i2c-parport.
config I2C_PARPORT_LIGHT
tristate "Parallel port adapter (light)"
select I2C_ALGOBIT
select I2C_SMBUS
help
This supports parallel port I2C adapters such as the ones made by
Philips or Velleman, Analog Devices evaluation boards, and more.
Basically any adapter using the parallel port as an I2C bus with
no extra chipset is supported by this driver, or could be.
This driver is a light version of i2c-parport. It doesn't depend
on the parport driver, and uses direct I/O access instead. This
might be preferred on embedded systems where wasting memory for
the clean but heavy parport handling is not an option. The
drawback is a reduced portability and the impossibility to
daisy-chain other parallel port devices.
Don't say Y here if you said Y or M to i2c-parport. Saying M to
both is possible but both modules should not be loaded at the same
time.
This support is also available as a module. If so, the module
will be called i2c-parport-light.
config I2C_ROBOTFUZZ_OSIF
tristate "RobotFuzz Open Source InterFace USB adapter"
depends on USB
@@ -1328,7 +1299,7 @@ config I2C_ICY
config I2C_MLXCPLD
tristate "Mellanox I2C driver"
depends on X86_64
depends on X86_64 || COMPILE_TEST
help
This exposes the Mellanox platform I2C busses to the linux I2C layer
for X86 based systems.

1
drivers/i2c/busses/Makefile
View File

@@ -128,7 +128,6 @@ obj-$(CONFIG_I2C_ZX2967) += i2c-zx2967.o
obj-$(CONFIG_I2C_DIOLAN_U2C) += i2c-diolan-u2c.o
obj-$(CONFIG_I2C_DLN2) += i2c-dln2.o
obj-$(CONFIG_I2C_PARPORT) += i2c-parport.o
obj-$(CONFIG_I2C_PARPORT_LIGHT) += i2c-parport-light.o
obj-$(CONFIG_I2C_ROBOTFUZZ_OSIF) += i2c-robotfuzz-osif.o
obj-$(CONFIG_I2C_TAOS_EVM) += i2c-taos-evm.o
obj-$(CONFIG_I2C_TINY_USB) += i2c-tiny-usb.o

39
drivers/i2c/busses/i2c-at91-core.c
View File

@@ -66,55 +66,26 @@ static struct at91_twi_pdata at91rm9200_config = {
.clk_max_div = 5,
.clk_offset = 3,
.has_unre_flag = true,
.has_alt_cmd = false,
.has_hold_field = false,
.has_dig_filtr = false,
.has_adv_dig_filtr = false,
.has_ana_filtr = false,
};
static struct at91_twi_pdata at91sam9261_config = {
.clk_max_div = 5,
.clk_offset = 4,
.has_unre_flag = false,
.has_alt_cmd = false,
.has_hold_field = false,
.has_dig_filtr = false,
.has_adv_dig_filtr = false,
.has_ana_filtr = false,
};
static struct at91_twi_pdata at91sam9260_config = {
.clk_max_div = 7,
.clk_offset = 4,
.has_unre_flag = false,
.has_alt_cmd = false,
.has_hold_field = false,
.has_dig_filtr = false,
.has_adv_dig_filtr = false,
.has_ana_filtr = false,
};
static struct at91_twi_pdata at91sam9g20_config = {
.clk_max_div = 7,
.clk_offset = 4,
.has_unre_flag = false,
.has_alt_cmd = false,
.has_hold_field = false,
.has_dig_filtr = false,
.has_adv_dig_filtr = false,
.has_ana_filtr = false,
};
static struct at91_twi_pdata at91sam9g10_config = {
.clk_max_div = 7,
.clk_offset = 4,
.has_unre_flag = false,
.has_alt_cmd = false,
.has_hold_field = false,
.has_dig_filtr = false,
.has_adv_dig_filtr = false,
.has_ana_filtr = false,
};
static const struct platform_device_id at91_twi_devtypes[] = {
@@ -142,23 +113,13 @@ static const struct platform_device_id at91_twi_devtypes[] = {
static struct at91_twi_pdata at91sam9x5_config = {
.clk_max_div = 7,
.clk_offset = 4,
.has_unre_flag = false,
.has_alt_cmd = false,
.has_hold_field = false,
.has_dig_filtr = false,
.has_adv_dig_filtr = false,
.has_ana_filtr = false,
};
static struct at91_twi_pdata sama5d4_config = {
.clk_max_div = 7,
.clk_offset = 4,
.has_unre_flag = false,
.has_alt_cmd = false,
.has_hold_field = true,
.has_dig_filtr = true,
.has_adv_dig_filtr = false,
.has_ana_filtr = false,
};
static struct at91_twi_pdata sama5d2_config = {

32
drivers/i2c/busses/i2c-cadence.c
View File

@@ -208,6 +208,7 @@ static irqreturn_t cdns_i2c_isr(int irq, void *ptr)
isr_status = cdns_i2c_readreg(CDNS_I2C_ISR_OFFSET);
cdns_i2c_writereg(isr_status, CDNS_I2C_ISR_OFFSET);
id->err_status = 0;
/* Handling nack and arbitration lost interrupt */
if (isr_status & (CDNS_I2C_IXR_NACK | CDNS_I2C_IXR_ARB_LOST)) {
@@ -241,10 +242,17 @@ static irqreturn_t cdns_i2c_isr(int irq, void *ptr)
!id->bus_hold_flag)
cdns_i2c_clear_bus_hold(id);
*(id->p_recv_buf)++ =
cdns_i2c_readreg(CDNS_I2C_DATA_OFFSET);
id->recv_count--;
id->curr_recv_count--;
if (id->recv_count > 0) {
*(id->p_recv_buf)++ =
cdns_i2c_readreg(CDNS_I2C_DATA_OFFSET);
id->recv_count--;
id->curr_recv_count--;
} else {
dev_err(id->adap.dev.parent,
"xfer_size reg rollover. xfer aborted!\n");
id->err_status |= CDNS_I2C_IXR_TO;
break;
}
if (cdns_is_holdquirk(id, hold_quirk))
break;
@@ -342,7 +350,7 @@ static irqreturn_t cdns_i2c_isr(int irq, void *ptr)
}
/* Update the status for errors */
id->err_status = isr_status & CDNS_I2C_IXR_ERR_INTR_MASK;
id->err_status |= isr_status & CDNS_I2C_IXR_ERR_INTR_MASK;
if (id->err_status)
status = IRQ_HANDLED;
@@ -500,7 +508,7 @@ static void cdns_i2c_master_reset(struct i2c_adapter *adap)
cdns_i2c_writereg(regval, CDNS_I2C_CR_OFFSET);
/* Update the transfercount register to zero */
cdns_i2c_writereg(0, CDNS_I2C_XFER_SIZE_OFFSET);
/* Clear the interupt status register */
/* Clear the interrupt status register */
regval = cdns_i2c_readreg(CDNS_I2C_ISR_OFFSET);
cdns_i2c_writereg(regval, CDNS_I2C_ISR_OFFSET);
/* Clear the status register */
@@ -921,17 +929,18 @@ static int cdns_i2c_probe(struct platform_device *pdev)
id->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(id->clk)) {
dev_err(&pdev->dev, "input clock not found.\n");
if (PTR_ERR(id->clk) != -EPROBE_DEFER)
dev_err(&pdev->dev, "input clock not found.\n");
return PTR_ERR(id->clk);
}
ret = clk_prepare_enable(id->clk);
if (ret)
dev_err(&pdev->dev, "Unable to enable clock.\n");
pm_runtime_enable(id->dev);
pm_runtime_set_autosuspend_delay(id->dev, CNDS_I2C_PM_TIMEOUT);
pm_runtime_use_autosuspend(id->dev);
pm_runtime_set_active(id->dev);
pm_runtime_enable(id->dev);
id->clk_rate_change_nb.notifier_call = cdns_i2c_clk_notifier_cb;
if (clk_notifier_register(id->clk, &id->clk_rate_change_nb))
@@ -980,8 +989,8 @@ static int cdns_i2c_probe(struct platform_device *pdev)
err_clk_dis:
clk_disable_unprepare(id->clk);
pm_runtime_set_suspended(&pdev->dev);
pm_runtime_disable(&pdev->dev);
pm_runtime_set_suspended(&pdev->dev);
return ret;
}
@@ -997,10 +1006,13 @@ static int cdns_i2c_remove(struct platform_device *pdev)
{
struct cdns_i2c *id = platform_get_drvdata(pdev);
pm_runtime_disable(&pdev->dev);
pm_runtime_set_suspended(&pdev->dev);
pm_runtime_dont_use_autosuspend(&pdev->dev);
i2c_del_adapter(&id->adap);
clk_notifier_unregister(id->clk, &id->clk_rate_change_nb);
clk_disable_unprepare(id->clk);
pm_runtime_disable(&pdev->dev);
return 0;
}

6
drivers/i2c/busses/i2c-cht-wc.c
View File

@@ -388,9 +388,9 @@ static int cht_wc_i2c_adap_i2c_probe(struct platform_device *pdev)
*/
if (acpi_dev_present("INT33FE", NULL, -1)) {
board_info.irq = adap->client_irq;
adap->client = i2c_new_device(&adap->adapter, &board_info);
if (!adap->client) {
ret = -ENOMEM;
adap->client = i2c_new_client_device(&adap->adapter, &board_info);
if (IS_ERR(adap->client)) {
ret = PTR_ERR(adap->client);
goto del_adapter;
}
}

3
drivers/i2c/busses/i2c-cros-ec-tunnel.c
View File

@@ -273,6 +273,7 @@ static int ec_i2c_probe(struct platform_device *pdev)
bus->adap.dev.parent = &pdev->dev;
bus->adap.dev.of_node = pdev->dev.of_node;
bus->adap.retries = I2C_MAX_RETRIES;
ACPI_COMPANION_SET(&bus->adap.dev, ACPI_COMPANION(&pdev->dev));
err = i2c_add_adapter(&bus->adap);
if (err)
@@ -298,7 +299,7 @@ static const struct of_device_id cros_ec_i2c_of_match[] = {
MODULE_DEVICE_TABLE(of, cros_ec_i2c_of_match);
static const struct acpi_device_id cros_ec_i2c_tunnel_acpi_id[] = {
{ "GOOG001A", 0 },
{ "GOOG0012", 0 },
{ }
};
MODULE_DEVICE_TABLE(acpi, cros_ec_i2c_tunnel_acpi_id);

2
drivers/i2c/busses/i2c-highlander.c
View File

@@ -322,7 +322,7 @@ static int highlander_i2c_smbus_xfer(struct i2c_adapter *adap, u16 addr,
tmp |= (SMMR_MODE0 | SMMR_MODE1);
break;
default:
dev_err(dev->dev, "unsupported xfer size %d\n", dev->buf_len);
dev_err(dev->dev, "unsupported xfer size %zu\n", dev->buf_len);
return -EINVAL;
}

10
drivers/i2c/busses/i2c-i801.c
View File

@@ -68,6 +68,7 @@
* Elkhart Lake (PCH) 0x4b23 32 hard yes yes yes
* Tiger Lake-LP (PCH) 0xa0a3 32 hard yes yes yes
* Jasper Lake (SOC) 0x4da3 32 hard yes yes yes
* Comet Lake-V (PCH) 0xa3a3 32 hard yes yes yes
*
* Features supported by this driver:
* Software PEC no
@@ -244,6 +245,7 @@
#define PCI_DEVICE_ID_INTEL_LEWISBURG_SSKU_SMBUS 0xa223
#define PCI_DEVICE_ID_INTEL_KABYLAKE_PCH_H_SMBUS 0xa2a3
#define PCI_DEVICE_ID_INTEL_CANNONLAKE_H_SMBUS 0xa323
#define PCI_DEVICE_ID_INTEL_COMETLAKE_V_SMBUS 0xa3a3
struct i801_mux_config {
char *gpio_chip;
@@ -1074,6 +1076,7 @@ static const struct pci_device_id i801_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICELAKE_LP_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_COMETLAKE_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_COMETLAKE_H_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_COMETLAKE_V_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ELKHART_LAKE_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_TIGERLAKE_LP_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_JASPER_LAKE_SMBUS) },
@@ -1142,7 +1145,7 @@ static void dmi_check_onboard_device(u8 type, const char *name,
memset(&info, 0, sizeof(struct i2c_board_info));
info.addr = dmi_devices[i].i2c_addr;
strlcpy(info.type, dmi_devices[i].i2c_type, I2C_NAME_SIZE);
i2c_new_device(adap, &info);
i2c_new_client_device(adap, &info);
break;
}
}
@@ -1296,7 +1299,7 @@ static void register_dell_lis3lv02d_i2c_device(struct i801_priv *priv)
memset(&info, 0, sizeof(struct i2c_board_info));
info.addr = dell_lis3lv02d_devices[i].i2c_addr;
strlcpy(info.type, "lis3lv02d", I2C_NAME_SIZE);
i2c_new_device(&priv->adapter, &info);
i2c_new_client_device(&priv->adapter, &info);
}
/* Register optional slaves */
@@ -1312,7 +1315,7 @@ static void i801_probe_optional_slaves(struct i801_priv *priv)
memset(&info, 0, sizeof(struct i2c_board_info));
info.addr = apanel_addr;
strlcpy(info.type, "fujitsu_apanel", I2C_NAME_SIZE);
i2c_new_device(&priv->adapter, &info);
i2c_new_client_device(&priv->adapter, &info);
}
if (dmi_name_in_vendors("FUJITSU"))
@@ -1742,6 +1745,7 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
case PCI_DEVICE_ID_INTEL_LEWISBURG_SSKU_SMBUS:
case PCI_DEVICE_ID_INTEL_DNV_SMBUS:
case PCI_DEVICE_ID_INTEL_KABYLAKE_PCH_H_SMBUS:
case PCI_DEVICE_ID_INTEL_COMETLAKE_V_SMBUS:
priv->features |= FEATURE_BLOCK_PROC;
priv->features |= FEATURE_I2C_BLOCK_READ;
priv->features |= FEATURE_IRQ;

156
drivers/i2c/busses/i2c-jz4780.c
View File

@@ -4,6 +4,7 @@
*
* Copyright (C) 2006 - 2009 Ingenic Semiconductor Inc.
* Copyright (C) 2015 Imagination Technologies
* Copyright (C) 2019 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
*/
#include <linux/bitops.h>
@@ -17,6 +18,7 @@
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/sched.h>
#include <linux/slab.h>
@@ -55,6 +57,7 @@
#define JZ4780_I2C_ACKGC 0x98
#define JZ4780_I2C_ENSTA 0x9C
#define JZ4780_I2C_SDAHD 0xD0
#define X1000_I2C_SDAHD 0x7C
#define JZ4780_I2C_CTRL_STPHLD BIT(7)
#define JZ4780_I2C_CTRL_SLVDIS BIT(6)
@@ -73,6 +76,8 @@
#define JZ4780_I2C_STA_TFNF BIT(1)
#define JZ4780_I2C_STA_ACT BIT(0)
#define X1000_I2C_DC_STOP BIT(9)
static const char * const jz4780_i2c_abrt_src[] = {
"ABRT_7B_ADDR_NOACK",
"ABRT_10ADDR1_NOACK",
@@ -130,18 +135,33 @@ static const char * const jz4780_i2c_abrt_src[] = {
#define JZ4780_I2CFLCNT_ADJUST(n) (((n) - 1) < 8 ? 8 : ((n) - 1))
#define JZ4780_I2C_FIFO_LEN 16
#define TX_LEVEL 3
#define RX_LEVEL (JZ4780_I2C_FIFO_LEN - TX_LEVEL - 1)
#define X1000_I2C_FIFO_LEN 64
#define JZ4780_I2C_TIMEOUT 300
#define BUFSIZE 200
enum ingenic_i2c_version {
ID_JZ4780,
ID_X1000,
};
/* ingenic_i2c_config: SoC specific config data. */
struct ingenic_i2c_config {
enum ingenic_i2c_version version;
int fifosize;
int tx_level;
int rx_level;
};
struct jz4780_i2c {
void __iomem *iomem;
int irq;
struct clk *clk;
struct i2c_adapter adap;
const struct ingenic_i2c_config *cdata;
/* lock to protect rbuf and wbuf between xfer_rd/wr and irq handler */
spinlock_t lock;
@@ -340,11 +360,18 @@ static int jz4780_i2c_set_speed(struct jz4780_i2c *i2c)
if (hold_time >= 0) {
/*i2c hold time enable */
hold_time |= JZ4780_I2C_SDAHD_HDENB;
jz4780_i2c_writew(i2c, JZ4780_I2C_SDAHD, hold_time);
if (i2c->cdata->version >= ID_X1000) {
jz4780_i2c_writew(i2c, X1000_I2C_SDAHD, hold_time);
} else {
hold_time |= JZ4780_I2C_SDAHD_HDENB;
jz4780_i2c_writew(i2c, JZ4780_I2C_SDAHD, hold_time);
}
} else {
/* disable hold time */
jz4780_i2c_writew(i2c, JZ4780_I2C_SDAHD, 0);
if (i2c->cdata->version >= ID_X1000)
jz4780_i2c_writew(i2c, X1000_I2C_SDAHD, 0);
else
jz4780_i2c_writew(i2c, JZ4780_I2C_SDAHD, 0);
}
return 0;
@@ -359,9 +386,11 @@ static int jz4780_i2c_cleanup(struct jz4780_i2c *i2c)
spin_lock_irqsave(&i2c->lock, flags);
/* can send stop now if need */
tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL);
tmp &= ~JZ4780_I2C_CTRL_STPHLD;
jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp);
if (i2c->cdata->version < ID_X1000) {
tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL);
tmp &= ~JZ4780_I2C_CTRL_STPHLD;
jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp);
}
/* disable all interrupts first */
jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, 0);
@@ -399,11 +428,19 @@ static int jz4780_i2c_prepare(struct jz4780_i2c *i2c)
return jz4780_i2c_enable(i2c);
}
static void jz4780_i2c_send_rcmd(struct jz4780_i2c *i2c, int cmd_count)
static void jz4780_i2c_send_rcmd(struct jz4780_i2c *i2c,
int cmd_count,
int cmd_left)
{
int i;
for (i = 0; i < cmd_count; i++)
for (i = 0; i < cmd_count - 1; i++)
jz4780_i2c_writew(i2c, JZ4780_I2C_DC, JZ4780_I2C_DC_READ);
if ((cmd_left == 0) && (i2c->cdata->version >= ID_X1000))
jz4780_i2c_writew(i2c, JZ4780_I2C_DC,
JZ4780_I2C_DC_READ | X1000_I2C_DC_STOP);
else
jz4780_i2c_writew(i2c, JZ4780_I2C_DC, JZ4780_I2C_DC_READ);
}
@@ -458,37 +495,44 @@ static irqreturn_t jz4780_i2c_irq(int irqno, void *dev_id)
rd_left = i2c->rd_total_len - i2c->rd_data_xfered;
if (rd_left <= JZ4780_I2C_FIFO_LEN)
if (rd_left <= i2c->cdata->fifosize)
jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, rd_left - 1);
}
if (intst & JZ4780_I2C_INTST_TXEMP) {
if (i2c->is_write == 0) {
int cmd_left = i2c->rd_total_len - i2c->rd_cmd_xfered;
int max_send = (JZ4780_I2C_FIFO_LEN - 1)
int max_send = (i2c->cdata->fifosize - 1)
- (i2c->rd_cmd_xfered
- i2c->rd_data_xfered);
int cmd_to_send = min(cmd_left, max_send);
if (i2c->rd_cmd_xfered != 0)
cmd_to_send = min(cmd_to_send,
JZ4780_I2C_FIFO_LEN
- TX_LEVEL - 1);
i2c->cdata->fifosize
- i2c->cdata->tx_level - 1);
if (cmd_to_send) {
jz4780_i2c_send_rcmd(i2c, cmd_to_send);
i2c->rd_cmd_xfered += cmd_to_send;
cmd_left = i2c->rd_total_len -
i2c->rd_cmd_xfered;
jz4780_i2c_send_rcmd(i2c,
cmd_to_send, cmd_left);
}
cmd_left = i2c->rd_total_len - i2c->rd_cmd_xfered;
if (cmd_left == 0) {
intmsk = jz4780_i2c_readw(i2c, JZ4780_I2C_INTM);
intmsk &= ~JZ4780_I2C_INTM_MTXEMP;
jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, intmsk);
tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL);
tmp &= ~JZ4780_I2C_CTRL_STPHLD;
jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp);
if (i2c->cdata->version < ID_X1000) {
tmp = jz4780_i2c_readw(i2c,
JZ4780_I2C_CTRL);
tmp &= ~JZ4780_I2C_CTRL_STPHLD;
jz4780_i2c_writew(i2c,
JZ4780_I2C_CTRL, tmp);
}
}
} else {
unsigned short data;
@@ -497,23 +541,26 @@ static irqreturn_t jz4780_i2c_irq(int irqno, void *dev_id)
i2c_sta = jz4780_i2c_readw(i2c, JZ4780_I2C_STA);
while ((i2c_sta & JZ4780_I2C_STA_TFNF) &&
(i2c->wt_len > 0)) {
(i2c->wt_len > 0)) {
i2c_sta = jz4780_i2c_readw(i2c, JZ4780_I2C_STA);
data = *i2c->wbuf;
data &= ~JZ4780_I2C_DC_READ;
jz4780_i2c_writew(i2c, JZ4780_I2C_DC,
data);
if ((!i2c->stop_hold) && (i2c->cdata->version >=
ID_X1000))
data |= X1000_I2C_DC_STOP;
jz4780_i2c_writew(i2c, JZ4780_I2C_DC, data);
i2c->wbuf++;
i2c->wt_len--;
}
if (i2c->wt_len == 0) {
if (!i2c->stop_hold) {
if ((!i2c->stop_hold) && (i2c->cdata->version <
ID_X1000)) {
tmp = jz4780_i2c_readw(i2c,
JZ4780_I2C_CTRL);
JZ4780_I2C_CTRL);
tmp &= ~JZ4780_I2C_CTRL_STPHLD;
jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL,
tmp);
jz4780_i2c_writew(i2c,
JZ4780_I2C_CTRL, tmp);
}
jz4780_i2c_trans_done(i2c);
@@ -567,20 +614,22 @@ static inline int jz4780_i2c_xfer_read(struct jz4780_i2c *i2c,
i2c->rd_data_xfered = 0;
i2c->rd_cmd_xfered = 0;
if (len <= JZ4780_I2C_FIFO_LEN)
if (len <= i2c->cdata->fifosize)
jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, len - 1);
else
jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, RX_LEVEL);
jz4780_i2c_writew(i2c, JZ4780_I2C_RXTL, i2c->cdata->rx_level);
jz4780_i2c_writew(i2c, JZ4780_I2C_TXTL, TX_LEVEL);
jz4780_i2c_writew(i2c, JZ4780_I2C_TXTL, i2c->cdata->tx_level);
jz4780_i2c_writew(i2c, JZ4780_I2C_INTM,
JZ4780_I2C_INTM_MRXFL | JZ4780_I2C_INTM_MTXEMP
| JZ4780_I2C_INTM_MTXABT | JZ4780_I2C_INTM_MRXOF);
tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL);
tmp |= JZ4780_I2C_CTRL_STPHLD;
jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp);
if (i2c->cdata->version < ID_X1000) {
tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL);
tmp |= JZ4780_I2C_CTRL_STPHLD;
jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp);
}
spin_unlock_irqrestore(&i2c->lock, flags);
@@ -626,14 +675,16 @@ static inline int jz4780_i2c_xfer_write(struct jz4780_i2c *i2c,
i2c->wbuf = buf;
i2c->wt_len = len;
jz4780_i2c_writew(i2c, JZ4780_I2C_TXTL, TX_LEVEL);
jz4780_i2c_writew(i2c, JZ4780_I2C_TXTL, i2c->cdata->tx_level);
jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, JZ4780_I2C_INTM_MTXEMP
| JZ4780_I2C_INTM_MTXABT);
tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL);
tmp |= JZ4780_I2C_CTRL_STPHLD;
jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp);
if (i2c->cdata->version < ID_X1000) {
tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL);
tmp |= JZ4780_I2C_CTRL_STPHLD;
jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp);
}
spin_unlock_irqrestore(&i2c->lock, flags);
@@ -716,8 +767,25 @@ static const struct i2c_algorithm jz4780_i2c_algorithm = {
.functionality = jz4780_i2c_functionality,
};
static const struct ingenic_i2c_config jz4780_i2c_config = {
.version = ID_JZ4780,
.fifosize = JZ4780_I2C_FIFO_LEN,
.tx_level = JZ4780_I2C_FIFO_LEN / 2,
.rx_level = JZ4780_I2C_FIFO_LEN / 2 - 1,
};
static const struct ingenic_i2c_config x1000_i2c_config = {
.version = ID_X1000,
.fifosize = X1000_I2C_FIFO_LEN,
.tx_level = X1000_I2C_FIFO_LEN / 2,
.rx_level = X1000_I2C_FIFO_LEN / 2 - 1,
};
static const struct of_device_id jz4780_i2c_of_matches[] = {
{ .compatible = "ingenic,jz4780-i2c", },
{ .compatible = "ingenic,jz4780-i2c", .data = &jz4780_i2c_config },
{ .compatible = "ingenic,x1000-i2c", .data = &x1000_i2c_config },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, jz4780_i2c_of_matches);
@@ -734,6 +802,12 @@ static int jz4780_i2c_probe(struct platform_device *pdev)
if (!i2c)
return -ENOMEM;
i2c->cdata = device_get_match_data(&pdev->dev);
if (!i2c->cdata) {
dev_err(&pdev->dev, "Error: No device match found\n");
return -ENODEV;
}
i2c->adap.owner = THIS_MODULE;
i2c->adap.algo = &jz4780_i2c_algorithm;
i2c->adap.algo_data = i2c;
@@ -777,9 +851,11 @@ static int jz4780_i2c_probe(struct platform_device *pdev)
dev_info(&pdev->dev, "Bus frequency is %d KHz\n", i2c->speed);
tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL);
tmp &= ~JZ4780_I2C_CTRL_STPHLD;
jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp);
if (i2c->cdata->version < ID_X1000) {
tmp = jz4780_i2c_readw(i2c, JZ4780_I2C_CTRL);
tmp &= ~JZ4780_I2C_CTRL_STPHLD;
jz4780_i2c_writew(i2c, JZ4780_I2C_CTRL, tmp);
}
jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, 0x0);

97
drivers/i2c/busses/i2c-meson.c
View File

@@ -10,6 +10,7 @@
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
@@ -213,6 +214,30 @@ static void meson_i2c_prepare_xfer(struct meson_i2c *i2c)
writel(i2c->tokens[1], i2c->regs + REG_TOK_LIST1);
}
static void meson_i2c_transfer_complete(struct meson_i2c *i2c, u32 ctrl)
{
if (ctrl & REG_CTRL_ERROR) {
/*
* The bit is set when the IGNORE_NAK bit is cleared
* and the device didn't respond. In this case, the
* I2C controller automatically generates a STOP
* condition.
*/
dev_dbg(i2c->dev, "error bit set\n");
i2c->error = -ENXIO;
i2c->state = STATE_IDLE;
} else {
if (i2c->state == STATE_READ && i2c->count)
meson_i2c_get_data(i2c, i2c->msg->buf + i2c->pos,
i2c->count);
i2c->pos += i2c->count;
if (i2c->pos >= i2c->msg->len)
i2c->state = STATE_IDLE;
}
}
static irqreturn_t meson_i2c_irq(int irqno, void *dev_id)
{
struct meson_i2c *i2c = dev_id;
@@ -232,27 +257,9 @@ static irqreturn_t meson_i2c_irq(int irqno, void *dev_id)
return IRQ_NONE;
}
if (ctrl & REG_CTRL_ERROR) {
/*
* The bit is set when the IGNORE_NAK bit is cleared
* and the device didn't respond. In this case, the
* I2C controller automatically generates a STOP
* condition.
*/
dev_dbg(i2c->dev, "error bit set\n");
i2c->error = -ENXIO;
i2c->state = STATE_IDLE;
complete(&i2c->done);
goto out;
}
meson_i2c_transfer_complete(i2c, ctrl);
if (i2c->state == STATE_READ && i2c->count)
meson_i2c_get_data(i2c, i2c->msg->buf + i2c->pos, i2c->count);
i2c->pos += i2c->count;
if (i2c->pos >= i2c->msg->len) {
i2c->state = STATE_IDLE;
if (i2c->state == STATE_IDLE) {
complete(&i2c->done);
goto out;
}
@@ -279,10 +286,11 @@ static void meson_i2c_do_start(struct meson_i2c *i2c, struct i2c_msg *msg)
}
static int meson_i2c_xfer_msg(struct meson_i2c *i2c, struct i2c_msg *msg,
int last)
int last, bool atomic)
{
unsigned long time_left, flags;
int ret = 0;
u32 ctrl;
i2c->msg = msg;
i2c->last = last;
@@ -300,13 +308,24 @@ static int meson_i2c_xfer_msg(struct meson_i2c *i2c, struct i2c_msg *msg,
i2c->state = (msg->flags & I2C_M_RD) ? STATE_READ : STATE_WRITE;
meson_i2c_prepare_xfer(i2c);
reinit_completion(&i2c->done);
if (!atomic)
reinit_completion(&i2c->done);
/* Start the transfer */
meson_i2c_set_mask(i2c, REG_CTRL, REG_CTRL_START, REG_CTRL_START);
time_left = msecs_to_jiffies(I2C_TIMEOUT_MS);
time_left = wait_for_completion_timeout(&i2c->done, time_left);
if (atomic) {
ret = readl_poll_timeout_atomic(i2c->regs + REG_CTRL, ctrl,
!(ctrl & REG_CTRL_STATUS),
10, I2C_TIMEOUT_MS * 1000);
} else {
time_left = msecs_to_jiffies(I2C_TIMEOUT_MS);
time_left = wait_for_completion_timeout(&i2c->done, time_left);
if (!time_left)
ret = -ETIMEDOUT;
}
/*
* Protect access to i2c struct and registers from interrupt
@@ -315,13 +334,14 @@ static int meson_i2c_xfer_msg(struct meson_i2c *i2c, struct i2c_msg *msg,
*/
spin_lock_irqsave(&i2c->lock, flags);
if (atomic && !ret)
meson_i2c_transfer_complete(i2c, ctrl);
/* Abort any active operation */
meson_i2c_set_mask(i2c, REG_CTRL, REG_CTRL_START, 0);
if (!time_left) {
if (ret)
i2c->state = STATE_IDLE;
ret = -ETIMEDOUT;
}
if (i2c->error)
ret = i2c->error;
@@ -331,8 +351,8 @@ static int meson_i2c_xfer_msg(struct meson_i2c *i2c, struct i2c_msg *msg,
return ret;
}
static int meson_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
int num)
static int meson_i2c_xfer_messages(struct i2c_adapter *adap,
struct i2c_msg *msgs, int num, bool atomic)
{
struct meson_i2c *i2c = adap->algo_data;
int i, ret = 0;
@@ -340,7 +360,7 @@ static int meson_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
clk_enable(i2c->clk);
for (i = 0; i < num; i++) {
ret = meson_i2c_xfer_msg(i2c, msgs + i, i == num - 1);
ret = meson_i2c_xfer_msg(i2c, msgs + i, i == num - 1, atomic);
if (ret)
break;
}
@@ -350,14 +370,27 @@ static int meson_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
return ret ?: i;
}
static int meson_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
int num)
{
return meson_i2c_xfer_messages(adap, msgs, num, false);
}
static int meson_i2c_xfer_atomic(struct i2c_adapter *adap,
struct i2c_msg *msgs, int num)
{
return meson_i2c_xfer_messages(adap, msgs, num, true);
}
static u32 meson_i2c_func(struct i2c_adapter *adap)
{
return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
}
static const struct i2c_algorithm meson_i2c_algorithm = {
.master_xfer = meson_i2c_xfer,
.functionality = meson_i2c_func,
.master_xfer = meson_i2c_xfer,
.master_xfer_atomic = meson_i2c_xfer_atomic,
.functionality = meson_i2c_func,
};
static int meson_i2c_probe(struct platform_device *pdev)

6
drivers/i2c/busses/i2c-nvidia-gpu.c
View File

@@ -280,9 +280,9 @@ static int gpu_populate_client(struct gpu_i2c_dev *i2cd, int irq)
i2cd->gpu_ccgx_ucsi->addr = 0x8;
i2cd->gpu_ccgx_ucsi->irq = irq;
i2cd->gpu_ccgx_ucsi->properties = ccgx_props;
i2cd->ccgx_client = i2c_new_device(&i2cd->adapter, i2cd->gpu_ccgx_ucsi);
if (!i2cd->ccgx_client)
return -ENODEV;
i2cd->ccgx_client = i2c_new_client_device(&i2cd->adapter, i2cd->gpu_ccgx_ucsi);
if (IS_ERR(i2cd->ccgx_client))
return PTR_ERR(i2cd->ccgx_client);
return 0;
}

2
drivers/i2c/busses/i2c-ocores.c
View File

@@ -731,7 +731,7 @@ static int ocores_i2c_probe(struct platform_device *pdev)
/* add in known devices to the bus */
if (pdata) {
for (i = 0; i < pdata->num_devices; i++)
i2c_new_device(&i2c->adap, pdata->devices + i);
i2c_new_client_device(&i2c->adap, pdata->devices + i);
}
return 0;

267
drivers/i2c/busses/i2c-parport-light.c
View File

@@ -1,267 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/* ------------------------------------------------------------------------ *
* i2c-parport-light.c I2C bus over parallel port *
* ------------------------------------------------------------------------ *
Copyright (C) 2003-2010 Jean Delvare <jdelvare@suse.de>
Based on older i2c-velleman.c driver
Copyright (C) 1995-2000 Simon G. Vogl
With some changes from:
Frodo Looijaard <frodol@dds.nl>
Kyösti Mälkki <kmalkki@cc.hut.fi>
* ------------------------------------------------------------------------ */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/ioport.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/i2c-smbus.h>
#include <linux/io.h>
#include "i2c-parport.h"
#define DEFAULT_BASE 0x378
#define DRVNAME "i2c-parport-light"
static struct platform_device *pdev;
static u16 base;
module_param_hw(base, ushort, ioport, 0);
MODULE_PARM_DESC(base, "Base I/O address");
static int irq;
module_param_hw(irq, int, irq, 0);
MODULE_PARM_DESC(irq, "IRQ (optional)");
/* ----- Low-level parallel port access ----------------------------------- */
static inline void port_write(unsigned char p, unsigned char d)
{
outb(d, base+p);
}
static inline unsigned char port_read(unsigned char p)
{
return inb(base+p);
}
/* ----- Unified line operation functions --------------------------------- */
static inline void line_set(int state, const struct lineop *op)
{
u8 oldval = port_read(op->port);
/* Touch only the bit(s) needed */
if ((op->inverted && !state) || (!op->inverted && state))
port_write(op->port, oldval | op->val);
else
port_write(op->port, oldval & ~op->val);
}
static inline int line_get(const struct lineop *op)
{
u8 oldval = port_read(op->port);
return ((op->inverted && (oldval & op->val) != op->val)
|| (!op->inverted && (oldval & op->val) == op->val));
}
/* ----- I2C algorithm call-back functions and structures ----------------- */
static void parport_setscl(void *data, int state)
{
line_set(state, &adapter_parm[type].setscl);
}
static void parport_setsda(void *data, int state)
{
line_set(state, &adapter_parm[type].setsda);
}
static int parport_getscl(void *data)
{
return line_get(&adapter_parm[type].getscl);
}
static int parport_getsda(void *data)
{
return line_get(&adapter_parm[type].getsda);
}
/* Encapsulate the functions above in the correct structure
Note that getscl will be set to NULL by the attaching code for adapters
that cannot read SCL back */
static struct i2c_algo_bit_data parport_algo_data = {
.setsda = parport_setsda,
.setscl = parport_setscl,
.getsda = parport_getsda,
.getscl = parport_getscl,
.udelay = 50,
.timeout = HZ,
};
/* ----- Driver registration ---------------------------------------------- */
static struct i2c_adapter parport_adapter = {
.owner = THIS_MODULE,
.class = I2C_CLASS_HWMON,
.algo_data = &parport_algo_data,
.name = "Parallel port adapter (light)",
};
/* SMBus alert support */
static struct i2c_smbus_alert_setup alert_data = {
};
static struct i2c_client *ara;
static struct lineop parport_ctrl_irq = {
.val = (1 << 4),
.port = PORT_CTRL,
};
static int i2c_parport_probe(struct platform_device *pdev)
{
int err;
/* Reset hardware to a sane state (SCL and SDA high) */
parport_setsda(NULL, 1);
parport_setscl(NULL, 1);
/* Other init if needed (power on...) */
if (adapter_parm[type].init.val) {
line_set(1, &adapter_parm[type].init);
/* Give powered devices some time to settle */
msleep(100);
}
parport_adapter.dev.parent = &pdev->dev;
err = i2c_bit_add_bus(&parport_adapter);
if (err) {
dev_err(&pdev->dev, "Unable to register with I2C\n");
return err;
}
/* Setup SMBus alert if supported */
if (adapter_parm[type].smbus_alert && irq) {
alert_data.irq = irq;
ara = i2c_setup_smbus_alert(&parport_adapter, &alert_data);
if (ara)
line_set(1, &parport_ctrl_irq);
else
dev_warn(&pdev->dev, "Failed to register ARA client\n");
}
return 0;
}
static int i2c_parport_remove(struct platform_device *pdev)
{
if (ara) {
line_set(0, &parport_ctrl_irq);
i2c_unregister_device(ara);
ara = NULL;
}
i2c_del_adapter(&parport_adapter);
/* Un-init if needed (power off...) */
if (adapter_parm[type].init.val)
line_set(0, &adapter_parm[type].init);
return 0;
}
static struct platform_driver i2c_parport_driver = {
.driver = {
.name = DRVNAME,
},
.probe = i2c_parport_probe,
.remove = i2c_parport_remove,
};
static int __init i2c_parport_device_add(u16 address)
{
int err;
pdev = platform_device_alloc(DRVNAME, -1);
if (!pdev) {
err = -ENOMEM;
printk(KERN_ERR DRVNAME ": Device allocation failed\n");
goto exit;
}
err = platform_device_add(pdev);
if (err) {
printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
err);
goto exit_device_put;
}
return 0;
exit_device_put:
platform_device_put(pdev);
exit:
return err;
}
static int __init i2c_parport_init(void)
{
int err;
if (type < 0) {
printk(KERN_ERR DRVNAME ": adapter type unspecified\n");
return -ENODEV;
}
if (type >= ARRAY_SIZE(adapter_parm)) {
printk(KERN_ERR DRVNAME ": invalid type (%d)\n", type);
return -ENODEV;
}
if (base == 0) {
pr_info(DRVNAME ": using default base 0x%x\n", DEFAULT_BASE);
base = DEFAULT_BASE;
}
if (!request_region(base, 3, DRVNAME))
return -EBUSY;
if (irq != 0)
pr_info(DRVNAME ": using irq %d\n", irq);
if (!adapter_parm[type].getscl.val)
parport_algo_data.getscl = NULL;
/* Sets global pdev as a side effect */
err = i2c_parport_device_add(base);
if (err)
goto exit_release;
err = platform_driver_register(&i2c_parport_driver);
if (err)
goto exit_device;
return 0;
exit_device:
platform_device_unregister(pdev);
exit_release:
release_region(base, 3);
return err;
}
static void __exit i2c_parport_exit(void)
{
platform_driver_unregister(&i2c_parport_driver);
platform_device_unregister(pdev);
release_region(base, 3);
}
MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
MODULE_DESCRIPTION("I2C bus over parallel port (light)");
MODULE_LICENSE("GPL");
module_init(i2c_parport_init);
module_exit(i2c_parport_exit);

113
drivers/i2c/busses/i2c-parport.c
View File

@@ -25,7 +25,90 @@
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include "i2c-parport.h"
#define PORT_DATA 0
#define PORT_STAT 1
#define PORT_CTRL 2
struct lineop {
u8 val;
u8 port;
u8 inverted;
};
struct adapter_parm {
struct lineop setsda;
struct lineop setscl;
struct lineop getsda;
struct lineop getscl;
struct lineop init;
unsigned int smbus_alert:1;
};
static const struct adapter_parm adapter_parm[] = {
/* type 0: Philips adapter */
{
.setsda = { 0x80, PORT_DATA, 1 },
.setscl = { 0x08, PORT_CTRL, 0 },
.getsda = { 0x80, PORT_STAT, 0 },
.getscl = { 0x08, PORT_STAT, 0 },
},
/* type 1: home brew teletext adapter */
{
.setsda = { 0x02, PORT_DATA, 0 },
.setscl = { 0x01, PORT_DATA, 0 },
.getsda = { 0x80, PORT_STAT, 1 },
},
/* type 2: Velleman K8000 adapter */
{
.setsda = { 0x02, PORT_CTRL, 1 },
.setscl = { 0x08, PORT_CTRL, 1 },
.getsda = { 0x10, PORT_STAT, 0 },
},
/* type 3: ELV adapter */
{
.setsda = { 0x02, PORT_DATA, 1 },
.setscl = { 0x01, PORT_DATA, 1 },
.getsda = { 0x40, PORT_STAT, 1 },
.getscl = { 0x08, PORT_STAT, 1 },
},
/* type 4: ADM1032 evaluation board */
{
.setsda = { 0x02, PORT_DATA, 1 },
.setscl = { 0x01, PORT_DATA, 1 },
.getsda = { 0x10, PORT_STAT, 1 },
.init = { 0xf0, PORT_DATA, 0 },
.smbus_alert = 1,
},
/* type 5: ADM1025, ADM1030 and ADM1031 evaluation boards */
{
.setsda = { 0x02, PORT_DATA, 1 },
.setscl = { 0x01, PORT_DATA, 1 },
.getsda = { 0x10, PORT_STAT, 1 },
},
/* type 6: Barco LPT->DVI (K5800236) adapter */
{
.setsda = { 0x02, PORT_DATA, 1 },
.setscl = { 0x01, PORT_DATA, 1 },
.getsda = { 0x20, PORT_STAT, 0 },
.getscl = { 0x40, PORT_STAT, 0 },
.init = { 0xfc, PORT_DATA, 0 },
},
/* type 7: One For All JP1 parallel port adapter */
{
.setsda = { 0x01, PORT_DATA, 0 },
.setscl = { 0x02, PORT_DATA, 0 },
.getsda = { 0x80, PORT_STAT, 1 },
.init = { 0x04, PORT_DATA, 1 },
},
/* type 8: VCT-jig */
{
.setsda = { 0x04, PORT_DATA, 1 },
.setscl = { 0x01, PORT_DATA, 1 },
.getsda = { 0x40, PORT_STAT, 0 },
.getscl = { 0x80, PORT_STAT, 1 },
},
};
/* ----- Device list ------------------------------------------------------ */
@@ -40,9 +123,30 @@ struct i2c_par {
static LIST_HEAD(adapter_list);
static DEFINE_MUTEX(adapter_list_lock);
#define MAX_DEVICE 4
static int parport[MAX_DEVICE] = {0, -1, -1, -1};
module_param_array(parport, int, NULL, 0);
MODULE_PARM_DESC(parport,
"List of parallel ports to bind to, by index.\n"
" At most " __stringify(MAX_DEVICE) " devices are supported.\n"
" Default is one device connected to parport0.\n"
);
static int type = -1;
module_param(type, int, 0);
MODULE_PARM_DESC(type,
"Type of adapter:\n"
" 0 = Philips adapter\n"
" 1 = home brew teletext adapter\n"
" 2 = Velleman K8000 adapter\n"
" 3 = ELV adapter\n"
" 4 = ADM1032 evaluation board\n"
" 5 = ADM1025, ADM1030 and ADM1031 evaluation boards\n"
" 6 = Barco LPT->DVI (K5800236) adapter\n"
" 7 = One For All JP1 parallel port adapter\n"
" 8 = VCT-jig\n"
);
/* ----- Low-level parallel port access ----------------------------------- */
@@ -311,12 +415,5 @@ MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
MODULE_DESCRIPTION("I2C bus over parallel port");
MODULE_LICENSE("GPL");
module_param_array(parport, int, NULL, 0);
MODULE_PARM_DESC(parport,
"List of parallel ports to bind to, by index.\n"
" Atmost " __stringify(MAX_DEVICE) " devices are supported.\n"
" Default is one device connected to parport0.\n"
);
module_init(i2c_parport_init);
module_exit(i2c_parport_exit);

106
drivers/i2c/busses/i2c-parport.h
View File

@@ -1,106 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
/* ------------------------------------------------------------------------ *
* i2c-parport.h I2C bus over parallel port *
* ------------------------------------------------------------------------ *
Copyright (C) 2003-2010 Jean Delvare <jdelvare@suse.de>
* ------------------------------------------------------------------------ */
#define PORT_DATA 0
#define PORT_STAT 1
#define PORT_CTRL 2
struct lineop {
u8 val;
u8 port;
u8 inverted;
};
struct adapter_parm {
struct lineop setsda;
struct lineop setscl;
struct lineop getsda;
struct lineop getscl;
struct lineop init;
unsigned int smbus_alert:1;
};
static const struct adapter_parm adapter_parm[] = {
/* type 0: Philips adapter */
{
.setsda = { 0x80, PORT_DATA, 1 },
.setscl = { 0x08, PORT_CTRL, 0 },
.getsda = { 0x80, PORT_STAT, 0 },
.getscl = { 0x08, PORT_STAT, 0 },
},
/* type 1: home brew teletext adapter */
{
.setsda = { 0x02, PORT_DATA, 0 },
.setscl = { 0x01, PORT_DATA, 0 },
.getsda = { 0x80, PORT_STAT, 1 },
},
/* type 2: Velleman K8000 adapter */
{
.setsda = { 0x02, PORT_CTRL, 1 },
.setscl = { 0x08, PORT_CTRL, 1 },
.getsda = { 0x10, PORT_STAT, 0 },
},
/* type 3: ELV adapter */
{
.setsda = { 0x02, PORT_DATA, 1 },
.setscl = { 0x01, PORT_DATA, 1 },
.getsda = { 0x40, PORT_STAT, 1 },
.getscl = { 0x08, PORT_STAT, 1 },
},
/* type 4: ADM1032 evaluation board */
{
.setsda = { 0x02, PORT_DATA, 1 },
.setscl = { 0x01, PORT_DATA, 1 },
.getsda = { 0x10, PORT_STAT, 1 },
.init = { 0xf0, PORT_DATA, 0 },
.smbus_alert = 1,
},
/* type 5: ADM1025, ADM1030 and ADM1031 evaluation boards */
{
.setsda = { 0x02, PORT_DATA, 1 },
.setscl = { 0x01, PORT_DATA, 1 },
.getsda = { 0x10, PORT_STAT, 1 },
},
/* type 6: Barco LPT->DVI (K5800236) adapter */
{
.setsda = { 0x02, PORT_DATA, 1 },
.setscl = { 0x01, PORT_DATA, 1 },
.getsda = { 0x20, PORT_STAT, 0 },
.getscl = { 0x40, PORT_STAT, 0 },
.init = { 0xfc, PORT_DATA, 0 },
},
/* type 7: One For All JP1 parallel port adapter */
{
.setsda = { 0x01, PORT_DATA, 0 },
.setscl = { 0x02, PORT_DATA, 0 },
.getsda = { 0x80, PORT_STAT, 1 },
.init = { 0x04, PORT_DATA, 1 },
},
/* type 8: VCT-jig */
{
.setsda = { 0x04, PORT_DATA, 1 },
.setscl = { 0x01, PORT_DATA, 1 },
.getsda = { 0x40, PORT_STAT, 0 },
.getscl = { 0x80, PORT_STAT, 1 },
},
};
static int type = -1;
module_param(type, int, 0);
MODULE_PARM_DESC(type,
"Type of adapter:\n"
" 0 = Philips adapter\n"
" 1 = home brew teletext adapter\n"
" 2 = Velleman K8000 adapter\n"
" 3 = ELV adapter\n"
" 4 = ADM1032 evaluation board\n"
" 5 = ADM1025, ADM1030 and ADM1031 evaluation boards\n"
" 6 = Barco LPT->DVI (K5800236) adapter\n"
" 7 = One For All JP1 parallel port adapter\n"
" 8 = VCT-jig\n"
);

6
drivers/i2c/busses/i2c-pmcmsp.c
View File

@@ -274,8 +274,8 @@ static int pmcmsptwi_probe(struct platform_device *pldev)
if (!request_mem_region(res->start, resource_size(res),
pldev->name)) {
dev_err(&pldev->dev,
"Unable to get memory/io address region 0x%08x\n",
res->start);
"Unable to get memory/io address region %pap\n",
&res->start);
rc = -EBUSY;
goto ret_err;
}
@@ -285,7 +285,7 @@ static int pmcmsptwi_probe(struct platform_device *pldev)
resource_size(res));
if (!pmcmsptwi_data.iobase) {
dev_err(&pldev->dev,
"Unable to ioremap address 0x%08x\n", res->start);
"Unable to ioremap address %pap\n", &res->start);
rc = -EIO;
goto ret_unreserve;
}

4
drivers/i2c/busses/i2c-pnx.c
View File

@@ -734,8 +734,8 @@ static int i2c_pnx_probe(struct platform_device *pdev)
if (ret < 0)
goto out_clock;
dev_dbg(&pdev->dev, "%s: Master at %#8x, irq %d.\n",
alg_data->adapter.name, res->start, alg_data->irq);
dev_dbg(&pdev->dev, "%s: Master at %pap, irq %d.\n",
alg_data->adapter.name, &res->start, alg_data->irq);
return 0;

8
drivers/i2c/busses/i2c-powermac.c
View File

@@ -240,8 +240,8 @@ static void i2c_powermac_create_one(struct i2c_adapter *adap,
strncpy(info.type, type, sizeof(info.type));
info.addr = addr;
newdev = i2c_new_device(adap, &info);
if (!newdev)
newdev = i2c_new_client_device(adap, &info);
if (IS_ERR(newdev))
dev_err(&adap->dev,
"i2c-powermac: Failure to register missing %s\n",
type);
@@ -359,8 +359,8 @@ static void i2c_powermac_register_devices(struct i2c_adapter *adap,
info.irq = irq_of_parse_and_map(node, 0);
info.of_node = of_node_get(node);
newdev = i2c_new_device(adap, &info);
if (!newdev) {
newdev = i2c_new_client_device(adap, &info);
if (IS_ERR(newdev)) {
dev_err(&adap->dev, "i2c-powermac: Failure to register"
" %pOF\n", node);
of_node_put(node);

117
drivers/i2c/busses/i2c-stm32f7.c
View File

@@ -168,6 +168,24 @@
#define STM32F7_AUTOSUSPEND_DELAY (HZ / 100)
/**
* struct stm32f7_i2c_regs - i2c f7 registers backup
* @cr1: Control register 1
* @cr2: Control register 2
* @oar1: Own address 1 register
* @oar2: Own address 2 register
* @pecr: PEC register
* @tmgr: Timing register
*/
struct stm32f7_i2c_regs {
u32 cr1;
u32 cr2;
u32 oar1;
u32 oar2;
u32 pecr;
u32 tmgr;
};
/**
* struct stm32f7_i2c_spec - private i2c specification timing
* @rate: I2C bus speed (Hz)
@@ -276,6 +294,7 @@ struct stm32f7_i2c_msg {
* @timing: I2C computed timings
* @slave: list of slave devices registered on the I2C bus
* @slave_running: slave device currently used
* @backup_regs: backup of i2c controller registers (for suspend/resume)
* @slave_dir: transfer direction for the current slave device
* @master_mode: boolean to know in which mode the I2C is running (master or
* slave)
@@ -298,6 +317,7 @@ struct stm32f7_i2c_dev {
struct stm32f7_i2c_timings timing;
struct i2c_client *slave[STM32F7_I2C_MAX_SLAVE];
struct i2c_client *slave_running;
struct stm32f7_i2c_regs backup_regs;
u32 slave_dir;
bool master_mode;
struct stm32_i2c_dma *dma;
@@ -2027,8 +2047,7 @@ static int stm32f7_i2c_remove(struct platform_device *pdev)
return 0;
}
#ifdef CONFIG_PM
static int stm32f7_i2c_runtime_suspend(struct device *dev)
static int __maybe_unused stm32f7_i2c_runtime_suspend(struct device *dev)
{
struct stm32f7_i2c_dev *i2c_dev = dev_get_drvdata(dev);
@@ -2038,7 +2057,7 @@ static int stm32f7_i2c_runtime_suspend(struct device *dev)
return 0;
}
static int stm32f7_i2c_runtime_resume(struct device *dev)
static int __maybe_unused stm32f7_i2c_runtime_resume(struct device *dev)
{
struct stm32f7_i2c_dev *i2c_dev = dev_get_drvdata(dev);
int ret;
@@ -2053,11 +2072,101 @@ static int stm32f7_i2c_runtime_resume(struct device *dev)
return 0;
}
#endif
static int __maybe_unused
stm32f7_i2c_regs_backup(struct stm32f7_i2c_dev *i2c_dev)
{
int ret;
struct stm32f7_i2c_regs *backup_regs = &i2c_dev->backup_regs;
ret = pm_runtime_get_sync(i2c_dev->dev);
if (ret < 0)
return ret;
backup_regs->cr1 = readl_relaxed(i2c_dev->base + STM32F7_I2C_CR1);
backup_regs->cr2 = readl_relaxed(i2c_dev->base + STM32F7_I2C_CR2);
backup_regs->oar1 = readl_relaxed(i2c_dev->base + STM32F7_I2C_OAR1);
backup_regs->oar2 = readl_relaxed(i2c_dev->base + STM32F7_I2C_OAR2);
backup_regs->pecr = readl_relaxed(i2c_dev->base + STM32F7_I2C_PECR);
backup_regs->tmgr = readl_relaxed(i2c_dev->base + STM32F7_I2C_TIMINGR);
pm_runtime_put_sync(i2c_dev->dev);
return ret;
}
static int __maybe_unused
stm32f7_i2c_regs_restore(struct stm32f7_i2c_dev *i2c_dev)
{
u32 cr1;
int ret;
struct stm32f7_i2c_regs *backup_regs = &i2c_dev->backup_regs;
ret = pm_runtime_get_sync(i2c_dev->dev);
if (ret < 0)
return ret;
cr1 = readl_relaxed(i2c_dev->base + STM32F7_I2C_CR1);
if (cr1 & STM32F7_I2C_CR1_PE)
stm32f7_i2c_clr_bits(i2c_dev->base + STM32F7_I2C_CR1,
STM32F7_I2C_CR1_PE);
writel_relaxed(backup_regs->tmgr, i2c_dev->base + STM32F7_I2C_TIMINGR);
writel_relaxed(backup_regs->cr1 & ~STM32F7_I2C_CR1_PE,
i2c_dev->base + STM32F7_I2C_CR1);
if (backup_regs->cr1 & STM32F7_I2C_CR1_PE)
stm32f7_i2c_set_bits(i2c_dev->base + STM32F7_I2C_CR1,
STM32F7_I2C_CR1_PE);
writel_relaxed(backup_regs->cr2, i2c_dev->base + STM32F7_I2C_CR2);
writel_relaxed(backup_regs->oar1, i2c_dev->base + STM32F7_I2C_OAR1);
writel_relaxed(backup_regs->oar2, i2c_dev->base + STM32F7_I2C_OAR2);
writel_relaxed(backup_regs->pecr, i2c_dev->base + STM32F7_I2C_PECR);
pm_runtime_put_sync(i2c_dev->dev);
return ret;
}
static int __maybe_unused stm32f7_i2c_suspend(struct device *dev)
{
struct stm32f7_i2c_dev *i2c_dev = dev_get_drvdata(dev);
int ret;
i2c_mark_adapter_suspended(&i2c_dev->adap);
ret = stm32f7_i2c_regs_backup(i2c_dev);
if (ret < 0) {
i2c_mark_adapter_resumed(&i2c_dev->adap);
return ret;
}
pinctrl_pm_select_sleep_state(dev);
pm_runtime_force_suspend(dev);
return 0;
}
static int __maybe_unused stm32f7_i2c_resume(struct device *dev)
{
struct stm32f7_i2c_dev *i2c_dev = dev_get_drvdata(dev);
int ret;
ret = pm_runtime_force_resume(dev);
if (ret < 0)
return ret;
pinctrl_pm_select_default_state(dev);
ret = stm32f7_i2c_regs_restore(i2c_dev);
if (ret < 0)
return ret;
i2c_mark_adapter_resumed(&i2c_dev->adap);
return 0;
}
static const struct dev_pm_ops stm32f7_i2c_pm_ops = {
SET_RUNTIME_PM_OPS(stm32f7_i2c_runtime_suspend,
stm32f7_i2c_runtime_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(stm32f7_i2c_suspend, stm32f7_i2c_resume)
};
static const struct of_device_id stm32f7_i2c_match[] = {

2
drivers/i2c/busses/i2c-stu300.c
View File

@@ -444,7 +444,7 @@ static int stu300_wait_while_busy(struct stu300_dev *dev)
"Attempt: %d\n", i+1);
dev_err(&dev->pdev->dev, "base address = "
"0x%08x, reinit hardware\n", (u32) dev->virtbase);
"0x%p, reinit hardware\n", dev->virtbase);
(void) stu300_init_hw(dev);
}

4
drivers/i2c/busses/i2c-taos-evm.c
View File

@@ -49,10 +49,10 @@ static struct i2c_client *taos_instantiate_device(struct i2c_adapter *adapter)
if (!strncmp(adapter->name, "TAOS TSL2550 EVM", 16)) {
dev_info(&adapter->dev, "Instantiating device %s at 0x%02x\n",
tsl2550_info.type, tsl2550_info.addr);
return i2c_new_device(adapter, &tsl2550_info);
return i2c_new_client_device(adapter, &tsl2550_info);
}
return NULL;
return ERR_PTR(-ENODEV);
}
static int taos_smbus_xfer(struct i2c_adapter *adapter, u16 addr,

178
drivers/i2c/busses/i2c-tegra.c
View File

@@ -16,7 +16,9 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/ktime.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/pinctrl/consumer.h>
@@ -129,11 +131,12 @@
#define I2C_PACKET_HEADER_SIZE 12
/*
* Upto I2C_PIO_MODE_MAX_LEN bytes, controller will use PIO mode,
* above this, controller will use DMA to fill FIFO.
* MAX PIO len is 20 bytes excluding packet header.
* I2C Controller will use PIO mode for transfers up to 32 bytes in order to
* avoid DMA overhead, otherwise external APB DMA controller will be used.
* Note that the actual MAX PIO length is 20 bytes because 32 bytes include
* I2C_PACKET_HEADER_SIZE.
*/
#define I2C_PIO_MODE_MAX_LEN 32
#define I2C_PIO_MODE_PREFERRED_LEN 32
/*
* msg_end_type: The bus control which need to be send at end of transfer.
@@ -230,7 +233,6 @@ struct tegra_i2c_hw_feature {
* @base_phys: physical base address of the I2C controller
* @cont_id: I2C controller ID, used for packet header
* @irq: IRQ number of transfer complete interrupt
* @irq_disabled: used to track whether or not the interrupt is enabled
* @is_dvc: identifies the DVC I2C controller, has a different register layout
* @msg_complete: transfer completion notifier
* @msg_err: error code for completed message
@@ -240,7 +242,6 @@ struct tegra_i2c_hw_feature {
* @bus_clk_rate: current I2C bus clock rate
* @clk_divisor_non_hs_mode: clock divider for non-high-speed modes
* @is_multimaster_mode: track if I2C controller is in multi-master mode
* @xfer_lock: lock to serialize transfer submission and processing
* @tx_dma_chan: DMA transmit channel
* @rx_dma_chan: DMA receive channel
* @dma_phys: handle to DMA resources
@@ -248,6 +249,7 @@ struct tegra_i2c_hw_feature {
* @dma_buf_size: DMA buffer size
* @is_curr_dma_xfer: indicates active DMA transfer
* @dma_complete: DMA completion notifier
* @is_curr_atomic_xfer: indicates active atomic transfer
*/
struct tegra_i2c_dev {
struct device *dev;
@@ -260,7 +262,6 @@ struct tegra_i2c_dev {
phys_addr_t base_phys;
int cont_id;
int irq;
bool irq_disabled;
int is_dvc;
struct completion msg_complete;
int msg_err;
@@ -270,8 +271,6 @@ struct tegra_i2c_dev {
u32 bus_clk_rate;
u16 clk_divisor_non_hs_mode;
bool is_multimaster_mode;
/* xfer_lock: lock to serialize transfer submission and processing */
spinlock_t xfer_lock;
struct dma_chan *tx_dma_chan;
struct dma_chan *rx_dma_chan;
dma_addr_t dma_phys;
@@ -279,17 +278,18 @@ struct tegra_i2c_dev {
unsigned int dma_buf_size;
bool is_curr_dma_xfer;
struct completion dma_complete;
bool is_curr_atomic_xfer;
};
static void dvc_writel(struct tegra_i2c_dev *i2c_dev, u32 val,
unsigned long reg)
{
writel(val, i2c_dev->base + reg);
writel_relaxed(val, i2c_dev->base + reg);
}
static u32 dvc_readl(struct tegra_i2c_dev *i2c_dev, unsigned long reg)
{
return readl(i2c_dev->base + reg);
return readl_relaxed(i2c_dev->base + reg);
}
/*
@@ -307,16 +307,16 @@ static unsigned long tegra_i2c_reg_addr(struct tegra_i2c_dev *i2c_dev,
static void i2c_writel(struct tegra_i2c_dev *i2c_dev, u32 val,
unsigned long reg)
{
writel(val, i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg));
writel_relaxed(val, i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg));
/* Read back register to make sure that register writes completed */
if (reg != I2C_TX_FIFO)
readl(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg));
readl_relaxed(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg));
}
static u32 i2c_readl(struct tegra_i2c_dev *i2c_dev, unsigned long reg)
{
return readl(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg));
return readl_relaxed(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg));
}
static void i2c_writesl(struct tegra_i2c_dev *i2c_dev, void *data,
@@ -687,13 +687,15 @@ static int tegra_i2c_wait_for_config_load(struct tegra_i2c_dev *i2c_dev)
reg_offset = tegra_i2c_reg_addr(i2c_dev, I2C_CONFIG_LOAD);
addr = i2c_dev->base + reg_offset;
i2c_writel(i2c_dev, I2C_MSTR_CONFIG_LOAD, I2C_CONFIG_LOAD);
if (in_interrupt())
err = readl_poll_timeout_atomic(addr, val, val == 0,
1000,
I2C_CONFIG_LOAD_TIMEOUT);
if (i2c_dev->is_curr_atomic_xfer)
err = readl_relaxed_poll_timeout_atomic(
addr, val, val == 0, 1000,
I2C_CONFIG_LOAD_TIMEOUT);
else
err = readl_poll_timeout(addr, val, val == 0, 1000,
I2C_CONFIG_LOAD_TIMEOUT);
err = readl_relaxed_poll_timeout(
addr, val, val == 0, 1000,
I2C_CONFIG_LOAD_TIMEOUT);
if (err) {
dev_warn(i2c_dev->dev,
@@ -790,11 +792,6 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev, bool clk_reinit)
if (err)
return err;
if (i2c_dev->irq_disabled) {
i2c_dev->irq_disabled = false;
enable_irq(i2c_dev->irq);
}
return 0;
}
@@ -825,18 +822,12 @@ static irqreturn_t tegra_i2c_isr(int irq, void *dev_id)
status = i2c_readl(i2c_dev, I2C_INT_STATUS);
spin_lock(&i2c_dev->xfer_lock);
if (status == 0) {
dev_warn(i2c_dev->dev, "irq status 0 %08x %08x %08x\n",
i2c_readl(i2c_dev, I2C_PACKET_TRANSFER_STATUS),
i2c_readl(i2c_dev, I2C_STATUS),
i2c_readl(i2c_dev, I2C_CNFG));
i2c_dev->msg_err |= I2C_ERR_UNKNOWN_INTERRUPT;
if (!i2c_dev->irq_disabled) {
disable_irq_nosync(i2c_dev->irq);
i2c_dev->irq_disabled = true;
}
goto err;
}
@@ -925,7 +916,6 @@ err:
complete(&i2c_dev->msg_complete);
done:
spin_unlock(&i2c_dev->xfer_lock);
return IRQ_HANDLED;
}
@@ -999,6 +989,64 @@ out:
i2c_writel(i2c_dev, val, reg);
}
static unsigned long
tegra_i2c_poll_completion_timeout(struct tegra_i2c_dev *i2c_dev,
struct completion *complete,
unsigned int timeout_ms)
{
ktime_t ktime = ktime_get();
ktime_t ktimeout = ktime_add_ms(ktime, timeout_ms);
do {
u32 status = i2c_readl(i2c_dev, I2C_INT_STATUS);
if (status) {
tegra_i2c_isr(i2c_dev->irq, i2c_dev);
if (completion_done(complete)) {
s64 delta = ktime_ms_delta(ktimeout, ktime);
return msecs_to_jiffies(delta) ?: 1;
}
}
ktime = ktime_get();
} while (ktime_before(ktime, ktimeout));
return 0;
}
static unsigned long
tegra_i2c_wait_completion_timeout(struct tegra_i2c_dev *i2c_dev,
struct completion *complete,
unsigned int timeout_ms)
{
unsigned long ret;
if (i2c_dev->is_curr_atomic_xfer) {
ret = tegra_i2c_poll_completion_timeout(i2c_dev, complete,
timeout_ms);
} else {
enable_irq(i2c_dev->irq);
ret = wait_for_completion_timeout(complete,
msecs_to_jiffies(timeout_ms));
disable_irq(i2c_dev->irq);
/*
* There is a chance that completion may happen after IRQ
* synchronization, which is done by disable_irq().
*/
if (ret == 0 && completion_done(complete)) {
dev_warn(i2c_dev->dev,
"completion done after timeout\n");
ret = 1;
}
}
return ret;
}
static int tegra_i2c_issue_bus_clear(struct i2c_adapter *adap)
{
struct tegra_i2c_dev *i2c_dev = i2c_get_adapdata(adap);
@@ -1020,8 +1068,8 @@ static int tegra_i2c_issue_bus_clear(struct i2c_adapter *adap)
i2c_writel(i2c_dev, reg, I2C_BUS_CLEAR_CNFG);
tegra_i2c_unmask_irq(i2c_dev, I2C_INT_BUS_CLR_DONE);
time_left = wait_for_completion_timeout(&i2c_dev->msg_complete,
msecs_to_jiffies(50));
time_left = tegra_i2c_wait_completion_timeout(
i2c_dev, &i2c_dev->msg_complete, 50);
if (time_left == 0) {
dev_err(i2c_dev->dev, "timed out for bus clear\n");
return -ETIMEDOUT;
@@ -1044,7 +1092,6 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
u32 packet_header;
u32 int_mask;
unsigned long time_left;
unsigned long flags;
size_t xfer_size;
u32 *buffer = NULL;
int err = 0;
@@ -1065,8 +1112,9 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
xfer_size = msg->len + I2C_PACKET_HEADER_SIZE;
xfer_size = ALIGN(xfer_size, BYTES_PER_FIFO_WORD);
i2c_dev->is_curr_dma_xfer = (xfer_size > I2C_PIO_MODE_MAX_LEN) &&
i2c_dev->dma_buf;
i2c_dev->is_curr_dma_xfer = (xfer_size > I2C_PIO_MODE_PREFERRED_LEN) &&
i2c_dev->dma_buf &&
!i2c_dev->is_curr_atomic_xfer;
tegra_i2c_config_fifo_trig(i2c_dev, xfer_size);
dma = i2c_dev->is_curr_dma_xfer;
/*
@@ -1075,7 +1123,6 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
*/
xfer_time += DIV_ROUND_CLOSEST(((xfer_size * 9) + 2) * MSEC_PER_SEC,
i2c_dev->bus_clk_rate);
spin_lock_irqsave(&i2c_dev->xfer_lock, flags);
int_mask = I2C_INT_NO_ACK | I2C_INT_ARBITRATION_LOST;
tegra_i2c_unmask_irq(i2c_dev, int_mask);
@@ -1090,7 +1137,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
dev_err(i2c_dev->dev,
"starting RX DMA failed, err %d\n",
err);
goto unlock;
return err;
}
} else {
@@ -1149,7 +1196,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
dev_err(i2c_dev->dev,
"starting TX DMA failed, err %d\n",
err);
goto unlock;
return err;
}
} else {
tegra_i2c_fill_tx_fifo(i2c_dev);
@@ -1169,20 +1216,16 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
dev_dbg(i2c_dev->dev, "unmasked irq: %02x\n",
i2c_readl(i2c_dev, I2C_INT_MASK));
unlock:
spin_unlock_irqrestore(&i2c_dev->xfer_lock, flags);
if (dma) {
if (err)
return err;
time_left = tegra_i2c_wait_completion_timeout(
i2c_dev, &i2c_dev->dma_complete, xfer_time);
time_left = wait_for_completion_timeout(&i2c_dev->dma_complete,
msecs_to_jiffies(xfer_time));
if (time_left == 0) {
dmaengine_terminate_sync(i2c_dev->msg_read ?
i2c_dev->rx_dma_chan :
i2c_dev->tx_dma_chan);
if (!time_left && !completion_done(&i2c_dev->dma_complete)) {
dev_err(i2c_dev->dev, "DMA transfer timeout\n");
dmaengine_terminate_sync(i2c_dev->msg_read ?
i2c_dev->rx_dma_chan :
i2c_dev->tx_dma_chan);
tegra_i2c_init(i2c_dev, true);
return -ETIMEDOUT;
}
@@ -1195,20 +1238,15 @@ unlock:
memcpy(i2c_dev->msg_buf, i2c_dev->dma_buf,
msg->len);
}
if (i2c_dev->msg_err != I2C_ERR_NONE)
dmaengine_synchronize(i2c_dev->msg_read ?
i2c_dev->rx_dma_chan :
i2c_dev->tx_dma_chan);
}
time_left = wait_for_completion_timeout(&i2c_dev->msg_complete,
msecs_to_jiffies(xfer_time));
time_left = tegra_i2c_wait_completion_timeout(
i2c_dev, &i2c_dev->msg_complete, xfer_time);
tegra_i2c_mask_irq(i2c_dev, int_mask);
if (time_left == 0) {
dev_err(i2c_dev->dev, "i2c transfer timed out\n");
tegra_i2c_init(i2c_dev, true);
return -ETIMEDOUT;
}
@@ -1270,6 +1308,19 @@ static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
return ret ?: i;
}
static int tegra_i2c_xfer_atomic(struct i2c_adapter *adap,
struct i2c_msg msgs[], int num)
{
struct tegra_i2c_dev *i2c_dev = i2c_get_adapdata(adap);
int ret;
i2c_dev->is_curr_atomic_xfer = true;
ret = tegra_i2c_xfer(adap, msgs, num);
i2c_dev->is_curr_atomic_xfer = false;
return ret;
}
static u32 tegra_i2c_func(struct i2c_adapter *adap)
{
struct tegra_i2c_dev *i2c_dev = i2c_get_adapdata(adap);
@@ -1297,8 +1348,9 @@ static void tegra_i2c_parse_dt(struct tegra_i2c_dev *i2c_dev)
}
static const struct i2c_algorithm tegra_i2c_algo = {
.master_xfer = tegra_i2c_xfer,
.functionality = tegra_i2c_func,
.master_xfer = tegra_i2c_xfer,
.master_xfer_atomic = tegra_i2c_xfer_atomic,
.functionality = tegra_i2c_func,
};
/* payload size is only 12 bit */
@@ -1568,7 +1620,6 @@ static int tegra_i2c_probe(struct platform_device *pdev)
I2C_PACKET_HEADER_SIZE;
init_completion(&i2c_dev->msg_complete);
init_completion(&i2c_dev->dma_complete);
spin_lock_init(&i2c_dev->xfer_lock);
if (!i2c_dev->hw->has_single_clk_source) {
fast_clk = devm_clk_get(&pdev->dev, "fast-clk");
@@ -1607,6 +1658,7 @@ static int tegra_i2c_probe(struct platform_device *pdev)
goto unprepare_fast_clk;
}
pm_runtime_irq_safe(&pdev->dev);
pm_runtime_enable(&pdev->dev);
if (!pm_runtime_enabled(&pdev->dev)) {
ret = tegra_i2c_runtime_resume(&pdev->dev);
@@ -1644,6 +1696,8 @@ static int tegra_i2c_probe(struct platform_device *pdev)
goto release_dma;
}
irq_set_status_flags(i2c_dev->irq, IRQ_NOAUTOEN);
ret = devm_request_irq(&pdev->dev, i2c_dev->irq,
tegra_i2c_isr, 0, dev_name(&pdev->dev), i2c_dev);
if (ret) {

8
drivers/i2c/busses/i2c-tiny-usb.c
View File

@@ -84,7 +84,7 @@ static int usb_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs, int num)
pmsg->buf, pmsg->len) != pmsg->len) {
dev_err(&adapter->dev,
"failure reading data\n");
ret = -EREMOTEIO;
ret = -EIO;
goto out;
}
} else {
@@ -94,7 +94,7 @@ static int usb_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs, int num)
pmsg->buf, pmsg->len) != pmsg->len) {
dev_err(&adapter->dev,
"failure writing data\n");
ret = -EREMOTEIO;
ret = -EIO;
goto out;
}
}
@@ -102,13 +102,13 @@ static int usb_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs, int num)
/* read status */
if (usb_read(adapter, CMD_GET_STATUS, 0, 0, pstatus, 1) != 1) {
dev_err(&adapter->dev, "failure reading status\n");
ret = -EREMOTEIO;
ret = -EIO;
goto out;
}
dev_dbg(&adapter->dev, " status = %d\n", *pstatus);
if (*pstatus == STATUS_ADDRESS_NAK) {
ret = -EREMOTEIO;
ret = -ENXIO;
goto out;
}
}

69
drivers/i2c/busses/i2c-xiic.c
View File

@@ -156,6 +156,8 @@ struct xiic_i2c {
#define XIIC_RESET_MASK 0xAUL
#define XIIC_PM_TIMEOUT 1000 /* ms */
/* timeout waiting for the controller to respond */
#define XIIC_I2C_TIMEOUT (msecs_to_jiffies(1000))
/*
* The following constant is used for the device global interrupt enable
* register, to enable all interrupts for the device, this is the only bit
@@ -166,7 +168,7 @@ struct xiic_i2c {
#define xiic_tx_space(i2c) ((i2c)->tx_msg->len - (i2c)->tx_pos)
#define xiic_rx_space(i2c) ((i2c)->rx_msg->len - (i2c)->rx_pos)
static void xiic_start_xfer(struct xiic_i2c *i2c);
static int xiic_start_xfer(struct xiic_i2c *i2c);
static void __xiic_start_xfer(struct xiic_i2c *i2c);
/*
@@ -247,17 +249,29 @@ static inline void xiic_irq_clr_en(struct xiic_i2c *i2c, u32 mask)
xiic_irq_en(i2c, mask);
}
static void xiic_clear_rx_fifo(struct xiic_i2c *i2c)
static int xiic_clear_rx_fifo(struct xiic_i2c *i2c)
{
u8 sr;
unsigned long timeout;
timeout = jiffies + XIIC_I2C_TIMEOUT;
for (sr = xiic_getreg8(i2c, XIIC_SR_REG_OFFSET);
!(sr & XIIC_SR_RX_FIFO_EMPTY_MASK);
sr = xiic_getreg8(i2c, XIIC_SR_REG_OFFSET))
sr = xiic_getreg8(i2c, XIIC_SR_REG_OFFSET)) {
xiic_getreg8(i2c, XIIC_DRR_REG_OFFSET);
if (time_after(jiffies, timeout)) {
dev_err(i2c->dev, "Failed to clear rx fifo\n");
return -ETIMEDOUT;
}
}
return 0;
}
static void xiic_reinit(struct xiic_i2c *i2c)
static int xiic_reinit(struct xiic_i2c *i2c)
{
int ret;
xiic_setreg32(i2c, XIIC_RESETR_OFFSET, XIIC_RESET_MASK);
/* Set receive Fifo depth to maximum (zero based). */
@@ -270,12 +284,16 @@ static void xiic_reinit(struct xiic_i2c *i2c)
xiic_setreg8(i2c, XIIC_CR_REG_OFFSET, XIIC_CR_ENABLE_DEVICE_MASK);
/* make sure RX fifo is empty */
xiic_clear_rx_fifo(i2c);
ret = xiic_clear_rx_fifo(i2c);
if (ret)
return ret;
/* Enable interrupts */
xiic_setreg32(i2c, XIIC_DGIER_OFFSET, XIIC_GINTR_ENABLE_MASK);
xiic_irq_clr_en(i2c, XIIC_INTR_ARB_LOST_MASK);
return 0;
}
static void xiic_deinit(struct xiic_i2c *i2c)
@@ -655,12 +673,18 @@ static void __xiic_start_xfer(struct xiic_i2c *i2c)
}
static void xiic_start_xfer(struct xiic_i2c *i2c)
static int xiic_start_xfer(struct xiic_i2c *i2c)
{
int ret;
mutex_lock(&i2c->lock);
xiic_reinit(i2c);
__xiic_start_xfer(i2c);
ret = xiic_reinit(i2c);
if (!ret)
__xiic_start_xfer(i2c);
mutex_unlock(&i2c->lock);
return ret;
}
static int xiic_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
@@ -682,7 +706,11 @@ static int xiic_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
i2c->tx_msg = msgs;
i2c->nmsgs = num;
xiic_start_xfer(i2c);
err = xiic_start_xfer(i2c);
if (err < 0) {
dev_err(adap->dev.parent, "Error xiic_start_xfer\n");
goto out;
}
if (wait_event_timeout(i2c->wait, (i2c->state == STATE_ERROR) ||
(i2c->state == STATE_DONE), HZ)) {
@@ -760,7 +788,8 @@ static int xiic_i2c_probe(struct platform_device *pdev)
i2c->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(i2c->clk)) {
dev_err(&pdev->dev, "input clock not found.\n");
if (PTR_ERR(i2c->clk) != -EPROBE_DEFER)
dev_err(&pdev->dev, "input clock not found.\n");
return PTR_ERR(i2c->clk);
}
ret = clk_prepare_enable(i2c->clk);
@@ -769,10 +798,10 @@ static int xiic_i2c_probe(struct platform_device *pdev)
return ret;
}
i2c->dev = &pdev->dev;
pm_runtime_enable(i2c->dev);
pm_runtime_set_autosuspend_delay(i2c->dev, XIIC_PM_TIMEOUT);
pm_runtime_use_autosuspend(i2c->dev);
pm_runtime_set_active(i2c->dev);
pm_runtime_enable(i2c->dev);
ret = devm_request_threaded_irq(&pdev->dev, irq, xiic_isr,
xiic_process, IRQF_ONESHOT,
pdev->name, i2c);
@@ -794,7 +823,11 @@ static int xiic_i2c_probe(struct platform_device *pdev)
if (!(sr & XIIC_SR_TX_FIFO_EMPTY_MASK))
i2c->endianness = BIG;
xiic_reinit(i2c);
ret = xiic_reinit(i2c);
if (ret < 0) {
dev_err(&pdev->dev, "Cannot xiic_reinit\n");
goto err_clk_dis;
}
/* add i2c adapter to i2c tree */
ret = i2c_add_adapter(&i2c->adap);
@@ -806,7 +839,7 @@ static int xiic_i2c_probe(struct platform_device *pdev)
if (pdata) {
/* add in known devices to the bus */
for (i = 0; i < pdata->num_devices; i++)
i2c_new_device(&i2c->adap, pdata->devices + i);
i2c_new_client_device(&i2c->adap, pdata->devices + i);
}
return 0;
@@ -826,14 +859,16 @@ static int xiic_i2c_remove(struct platform_device *pdev)
/* remove adapter & data */
i2c_del_adapter(&i2c->adap);
ret = clk_prepare_enable(i2c->clk);
if (ret) {
dev_err(&pdev->dev, "Unable to enable clock.\n");
ret = pm_runtime_get_sync(i2c->dev);
if (ret < 0)
return ret;
}
xiic_deinit(i2c);
pm_runtime_put_sync(i2c->dev);
clk_disable_unprepare(i2c->clk);
pm_runtime_disable(&pdev->dev);
pm_runtime_set_suspended(&pdev->dev);
pm_runtime_dont_use_autosuspend(&pdev->dev);
return 0;
}

12
drivers/i2c/i2c-core-acpi.c
View File

@@ -225,7 +225,7 @@ static void i2c_acpi_register_device(struct i2c_adapter *adapter,
adev->power.flags.ignore_parent = true;
acpi_device_set_enumerated(adev);
if (!i2c_new_device(adapter, info)) {
if (IS_ERR(i2c_new_client_device(adapter, info))) {
adev->power.flags.ignore_parent = false;
dev_err(&adapter->dev,
"failed to add I2C device %s from ACPI\n",
@@ -451,7 +451,8 @@ struct notifier_block i2c_acpi_notifier = {
* resources, in that case this function can be used to create an i2c-client
* for other I2cSerialBus resources in the Current Resource Settings table.
*
* Also see i2c_new_device, which this function calls to create the i2c-client.
* Also see i2c_new_client_device, which this function calls to create the
* i2c-client.
*
* Returns a pointer to the new i2c-client, or error pointer in case of failure.
* Specifically, -EPROBE_DEFER is returned if the adapter is not found.
@@ -461,7 +462,6 @@ struct i2c_client *i2c_acpi_new_device(struct device *dev, int index,
{
struct i2c_acpi_lookup lookup;
struct i2c_adapter *adapter;
struct i2c_client *client;
struct acpi_device *adev;
LIST_HEAD(resource_list);
int ret;
@@ -489,11 +489,7 @@ struct i2c_client *i2c_acpi_new_device(struct device *dev, int index,
if (!adapter)
return ERR_PTR(-EPROBE_DEFER);
client = i2c_new_device(adapter, info);
if (!client)
return ERR_PTR(-ENODEV);
return client;
return i2c_new_client_device(adapter, info);
}
EXPORT_SYMBOL_GPL(i2c_acpi_new_device);

33
drivers/i2c/i2c-core-base.c
View File

@@ -456,15 +456,15 @@ static void i2c_client_dev_release(struct device *dev)
}
static ssize_t
show_name(struct device *dev, struct device_attribute *attr, char *buf)
name_show(struct device *dev, struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%s\n", dev->type == &i2c_client_type ?
to_i2c_client(dev)->name : to_i2c_adapter(dev)->name);
}
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
static DEVICE_ATTR_RO(name);
static ssize_t
show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
int len;
@@ -479,7 +479,7 @@ show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
return sprintf(buf, "%s%s\n", I2C_MODULE_PREFIX, client->name);
}
static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, NULL);
static DEVICE_ATTR_RO(modalias);
static struct attribute *i2c_dev_attrs[] = {
&dev_attr_name.attr,
@@ -831,8 +831,8 @@ EXPORT_SYMBOL_GPL(i2c_new_device);
/**
* i2c_unregister_device - reverse effect of i2c_new_device()
* @client: value returned from i2c_new_device()
* i2c_unregister_device - reverse effect of i2c_new_*_device()
* @client: value returned from i2c_new_*_device()
* Context: can sleep
*/
void i2c_unregister_device(struct i2c_client *client)
@@ -1023,8 +1023,8 @@ EXPORT_SYMBOL_GPL(i2c_adapter_depth);
* the user to provide incorrect parameters.
*/
static ssize_t
i2c_sysfs_new_device(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
new_device_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_adapter *adap = to_i2c_adapter(dev);
struct i2c_board_info info;
@@ -1079,7 +1079,7 @@ i2c_sysfs_new_device(struct device *dev, struct device_attribute *attr,
return count;
}
static DEVICE_ATTR(new_device, S_IWUSR, NULL, i2c_sysfs_new_device);
static DEVICE_ATTR_WO(new_device);
/*
* And of course let the users delete the devices they instantiated, if
@@ -1091,8 +1091,8 @@ static DEVICE_ATTR(new_device, S_IWUSR, NULL, i2c_sysfs_new_device);
* the user to delete the wrong device.
*/
static ssize_t
i2c_sysfs_delete_device(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
delete_device_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_adapter *adap = to_i2c_adapter(dev);
struct i2c_client *client, *next;
@@ -1135,7 +1135,7 @@ i2c_sysfs_delete_device(struct device *dev, struct device_attribute *attr,
return res;
}
static DEVICE_ATTR_IGNORE_LOCKDEP(delete_device, S_IWUSR, NULL,
i2c_sysfs_delete_device);
delete_device_store);
static struct attribute *i2c_adapter_attrs[] = {
&dev_attr_name.attr,
@@ -1178,9 +1178,8 @@ static void i2c_scan_static_board_info(struct i2c_adapter *adapter)
down_read(&__i2c_board_lock);
list_for_each_entry(devinfo, &__i2c_board_list, list) {
if (devinfo->busnum == adapter->nr
&& !i2c_new_device(adapter,
&devinfo->board_info))
if (devinfo->busnum == adapter->nr &&
IS_ERR(i2c_new_client_device(adapter, &devinfo->board_info)))
dev_err(&adapter->dev,
"Can't create device at 0x%02x\n",
devinfo->board_info.addr);
@@ -2167,8 +2166,8 @@ static int i2c_detect_address(struct i2c_client *temp_client,
dev_dbg(&adapter->dev, "Creating %s at 0x%02x\n",
info.type, info.addr);
client = i2c_new_device(adapter, &info);
if (client)
client = i2c_new_client_device(adapter, &info);
if (!IS_ERR(client))
list_add_tail(&client->detected, &driver->clients);
else
dev_err(&adapter->dev, "Failed creating %s at 0x%02x\n",

7
drivers/i2c/i2c-core-of.c
View File

@@ -75,11 +75,10 @@ static struct i2c_client *of_i2c_register_device(struct i2c_adapter *adap,
if (ret)
return ERR_PTR(ret);
client = i2c_new_device(adap, &info);
if (!client) {
client = i2c_new_client_device(adap, &info);
if (IS_ERR(client))
dev_err(&adap->dev, "of_i2c: Failure registering %pOF\n", node);
return ERR_PTR(-EINVAL);
}
return client;
}

27
drivers/i2c/muxes/i2c-mux-pca9541.c
View File

@@ -16,6 +16,7 @@
* warranty of any kind, whether express or implied.
*/
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/i2c.h>
@@ -42,20 +43,20 @@
#define PCA9541_CONTROL 0x01
#define PCA9541_ISTAT 0x02
#define PCA9541_CTL_MYBUS (1 << 0)
#define PCA9541_CTL_NMYBUS (1 << 1)
#define PCA9541_CTL_BUSON (1 << 2)
#define PCA9541_CTL_NBUSON (1 << 3)
#define PCA9541_CTL_BUSINIT (1 << 4)
#define PCA9541_CTL_TESTON (1 << 6)
#define PCA9541_CTL_NTESTON (1 << 7)
#define PCA9541_CTL_MYBUS BIT(0)
#define PCA9541_CTL_NMYBUS BIT(1)
#define PCA9541_CTL_BUSON BIT(2)
#define PCA9541_CTL_NBUSON BIT(3)
#define PCA9541_CTL_BUSINIT BIT(4)
#define PCA9541_CTL_TESTON BIT(6)
#define PCA9541_CTL_NTESTON BIT(7)
#define PCA9541_ISTAT_INTIN (1 << 0)
#define PCA9541_ISTAT_BUSINIT (1 << 1)
#define PCA9541_ISTAT_BUSOK (1 << 2)
#define PCA9541_ISTAT_BUSLOST (1 << 3)
#define PCA9541_ISTAT_MYTEST (1 << 6)
#define PCA9541_ISTAT_NMYTEST (1 << 7)
#define PCA9541_ISTAT_INTIN BIT(0)
#define PCA9541_ISTAT_BUSINIT BIT(1)
#define PCA9541_ISTAT_BUSOK BIT(2)
#define PCA9541_ISTAT_BUSLOST BIT(3)
#define PCA9541_ISTAT_MYTEST BIT(6)
#define PCA9541_ISTAT_NMYTEST BIT(7)
#define BUSON (PCA9541_CTL_BUSON | PCA9541_CTL_NBUSON)
#define MYBUS (PCA9541_CTL_MYBUS | PCA9541_CTL_NMYBUS)

69
drivers/i2c/muxes/i2c-mux-pca954x.c
View File

@@ -86,7 +86,7 @@ struct pca954x {
u8 last_chan; /* last register value */
/* MUX_IDLE_AS_IS, MUX_IDLE_DISCONNECT or >= 0 for channel */
s8 idle_state;
s32 idle_state;
struct i2c_client *client;
@@ -229,20 +229,23 @@ static int pca954x_reg_write(struct i2c_adapter *adap,
I2C_SMBUS_BYTE, &dummy);
}
static u8 pca954x_regval(struct pca954x *data, u8 chan)
{
/* We make switches look like muxes, not sure how to be smarter. */
if (data->chip->muxtype == pca954x_ismux)
return chan | data->chip->enable;
else
return 1 << chan;
}
static int pca954x_select_chan(struct i2c_mux_core *muxc, u32 chan)
{
struct pca954x *data = i2c_mux_priv(muxc);
struct i2c_client *client = data->client;
const struct chip_desc *chip = data->chip;
u8 regval;
int ret = 0;
/* we make switches look like muxes, not sure how to be smarter */
if (chip->muxtype == pca954x_ismux)
regval = chan | chip->enable;
else
regval = 1 << chan;
regval = pca954x_regval(data, chan);
/* Only select the channel if its different from the last channel */
if (data->last_chan != regval) {
ret = pca954x_reg_write(muxc->parent, client, regval);
@@ -256,7 +259,7 @@ static int pca954x_deselect_mux(struct i2c_mux_core *muxc, u32 chan)
{
struct pca954x *data = i2c_mux_priv(muxc);
struct i2c_client *client = data->client;
s8 idle_state;
s32 idle_state;
idle_state = READ_ONCE(data->idle_state);
if (idle_state >= 0)
@@ -402,6 +405,22 @@ static void pca954x_cleanup(struct i2c_mux_core *muxc)
i2c_mux_del_adapters(muxc);
}
static int pca954x_init(struct i2c_client *client, struct pca954x *data)
{
int ret;
if (data->idle_state >= 0)
data->last_chan = pca954x_regval(data, data->idle_state);
else
data->last_chan = 0; /* Disconnect multiplexer */
ret = i2c_smbus_write_byte(client, data->last_chan);
if (ret < 0)
data->last_chan = 0;
return ret;
}
/*
* I2C init/probing/exit functions
*/
@@ -411,7 +430,6 @@ static int pca954x_probe(struct i2c_client *client,
struct i2c_adapter *adap = client->adapter;
struct device *dev = &client->dev;
struct device_node *np = dev->of_node;
bool idle_disconnect_dt;
struct gpio_desc *gpio;
struct i2c_mux_core *muxc;
struct pca954x *data;
@@ -462,23 +480,24 @@ static int pca954x_probe(struct i2c_client *client,
}
}
/* Write the mux register at addr to verify
data->idle_state = MUX_IDLE_AS_IS;
if (of_property_read_u32(np, "idle-state", &data->idle_state)) {
if (np && of_property_read_bool(np, "i2c-mux-idle-disconnect"))
data->idle_state = MUX_IDLE_DISCONNECT;
}
/*
* Write the mux register at addr to verify
* that the mux is in fact present. This also
* initializes the mux to disconnected state.
* initializes the mux to a channel
* or disconnected state.
*/
if (i2c_smbus_write_byte(client, 0) < 0) {
ret = pca954x_init(client, data);
if (ret < 0) {
dev_warn(dev, "probe failed\n");
return -ENODEV;
}
data->last_chan = 0; /* force the first selection */
data->idle_state = MUX_IDLE_AS_IS;
idle_disconnect_dt = np &&
of_property_read_bool(np, "i2c-mux-idle-disconnect");
if (idle_disconnect_dt)
data->idle_state = MUX_IDLE_DISCONNECT;
ret = pca954x_irq_setup(muxc);
if (ret)
goto fail_cleanup;
@@ -530,9 +549,13 @@ static int pca954x_resume(struct device *dev)
struct i2c_client *client = to_i2c_client(dev);
struct i2c_mux_core *muxc = i2c_get_clientdata(client);
struct pca954x *data = i2c_mux_priv(muxc);
int ret;
data->last_chan = 0;
return i2c_smbus_write_byte(client, 0);
ret = pca954x_init(client, data);
if (ret < 0)
dev_err(&client->dev, "failed to verify mux presence\n");
return ret;
}
#endif