The rx_tail register is only 8 bit wide, so it will wrap around
after 256 read bytes. This makes it rather meaningless, so drop any
usage of it to not treat reads over 256 as failed.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Acked-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
The spi command must include the full message length including any
prepended writes, else transfers larger than 256 bytes will be
incomplete.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Acked-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
Cc: stable@vger.kernel.org
Use the right CONFIG symbol to guard, properly (un)preprare clocks on
suspend/resume, and check the result of it.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
Ensure we notice if the clock cannot be enabled for any reason and pass
the error down.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
dma_request_slave_channel() returns NULL on error and not ERR_PTRs.
I've fixed this by using dma_request_slave_channel_reason() which does
return ERR_PTRs.
Fixes: a915d150f6 ('spi: tegra: convert to standard DMA DT bindings')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Add PM support for eSPI controller using callback function suspend
and resume in .driver.pm of platform_driver.
Signed-off-by: Hou Zhiqiang <b48286@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
By using dma_request_slave_channel_or_err(), the DMA slave ID can be
looked up from standard DT properties, and squirrelled away during
channel allocation. Hence, there's no need to use a custom DT property
to store the slave ID.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Mark Brown <broonie@linaro.org>
Tegra's clock driver now provides an implementation of the common
reset API (include/linux/reset.h). Use this instead of the old Tegra-
specific API; that will soon be removed.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Mark Brown <broonie@linaro.org>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Previously used “unsigned long” may lead to confusion should the code
be compiled for 64-bit machine.
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Previously used “unsigned long” may lead to confusion should the code
be compiled for 64-bit machine.
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Previously used “unsigned long” may lead to confusion should the code
be compiled for 64-bit machine.
This commit also removes some unused fields of the tegra_spi_data
structure as well as removes duplicated #defines.
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Use devm_spi_register_master() to make cleanup paths simpler.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
devm_request_and_ioremap() returns NULL on error, it doesn't return an
ERR_PTR(). This patch fixes it by switching to devm_ioremap_resource()
which is the prefered function anyway.
Fixes: 142168eba9 ('spi: bcm63xx-hsspi: add bcm63xx HSSPI driver')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
Remove unneeded error handling on the result of a call
to platform_get_resource() when the value is passed to
devm_ioremap_resource().
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Mark Brown <broonie@linaro.org>
Add a driver for the High Speed SPI controller found on newer BCM63XX SoCs.
It does feature some new modes like 3-wire or dual spi, but neither of it
is currently implemented.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
Use devm_spi_register_master() to make cleanup paths simpler,
and remove unnecessary remove().
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Mark Brown <broonie@linaro.org>
Use devm_spi_register_master() to make cleanup paths simpler,
and remove unnecessary remove().
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
Don't use DEFINE_PCI_DEVICE_TABLE macro, because this macro
is not preferred.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Commit [8074cf06: use devm_spi_register_master()] removed the last
bit of omap1_spi100k_remove function that had side effects. After
call to spi_unregister_master was removed, the function consisted
of:
2. call to platform_get_drvdata whose return value was only used in:
2. call to spi_master_get_devdata whose return value was not used,
3. an if statement checking if zero was not zero, and
4. call to platform_get_resource whose return value was not used.
Ah, yes, and of course, final return 0. ;)
Since omap1_spi100k_remove no longer does anything, it can be
safely removed.
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Set hardware CS(CS control function on MSIOF <-> GPIO CS) polarity
according to SPI_CS_HIGH flag on spi->mode.
Signed-off-by: Takashi Yoshii <takasi-y@ops.dti.ne.jp>
Signed-off-by: Mark Brown <broonie@linaro.org>
Truncation on integer division in sh_msiof_spi_set_clk_regs()
results in insufficient transfer frequency (> max_speed_freq).
For example, source 52MHz, required max 6MHz
52/6 = 8.6 --> 8, then 1/8 table selected,
and result in 52/8 = 6.5 MHz (>6MHz)
Rounding it up is a simple solution.
52/6 = 8.6 --> 9, then 1/16 table selected,
and result in 52/16 = 3.25 MHz
Signed-off-by: Takashi Yoshii <takasi-y@ops.dti.ne.jp>
Signed-off-by: Mark Brown <broonie@linaro.org>
Get the driver ready for the migration to the common clock framework by
calling clk_prepare() and clk_unprepare(). The calls are added in the
probe and remove handlers as the clk_enable() and clk_disable() calls
are located in atomic context and there's no callback function in
non-atomic context that can be used to prepare/unprepare the clock.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
The platform driver data is set to point to the rspi_data structure at
probe time. Calling spi_master_get() on the pointer is just plain wrong
and only works by chance. Fix it by using the platform driver data
directly.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
The transfer data length variable is set based on the desired access
size, without a default case. This results in a compiler warning, even
though the access size is always set to a supported value. Create a
default case to silence the warning.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Cast pointers to uintptr_t instead of unsigned int. This fixes warnings
on platforms where pointers have a different size than int.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
The legacy S3C64xx DMA driver has been removed, DMA support on
S3C64xx is provided only by the generic PL08x driver.
This patch modifies the Kconfig entry of spi-s3c64xx driver, which
relies on availability of DMA, to always select the S3C64XX_PL080
symbol.
Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
With support for amba-pl08x driver, on S3C64xx the generic DMA engine
API can be used instead of the private s3c-dma interface.
Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
There is a bug in qspi removal path, as a result of which
qspi cannot be removed when used as a module. The patch
solves the bug and qspi can be removed cleanly.
The bugs fixed are:
-pm_runtime used around register access.
- pm_runtime_disable need to be done before removal.
- spi_unregister_master need to be called to unregister
the spi device.
Tested on DRA7 board.
Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
clean up pm_runtime error check in accordance with rest of the check in
the driver.
Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
The ti_qspi_remove() use the platform drvdata as a type of
struct ti_qspi, we should pass correct platform drvdata to
platform_set_drvdata() in ti_qspi_probe().
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Mark Brown <broonie@linaro.org>
The GPIO chip in use could be of any kind, and therefore might sleep
when accesing the GPIO lines. Take account of this by using cansleep
instead, which is the most generic case.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
All OMAP IP blocks expect LE data, but CPU may operate in BE mode.
Need to use endian neutral functions to read/write h/w registers.
I.e instead of __raw_read[lw] and __raw_write[lw] functions code
need to use read[lw]_relaxed and write[lw]_relaxed functions.
If the first simply reads/writes register, the second will byteswap
it if host operates in BE mode.
Changes are trivial sed like replacement of __raw_xxx functions
with xxx_relaxed variant.
Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
Signed-off-by: Taras Kondratiuk <taras.kondratiuk@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
With CONFIG_ARM_LPAE=y spi driver throws below warning
drivers/spi/spi-davinci.c: In function ‘davinci_spi_probe’:
drivers/spi/spi-davinci.c:965:3: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘resource_size_t’ [-Wformat]
drivers/spi/spi-davinci.c:965:3: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘resource_size_t’ [-Wformat]
Lets use '%pa' to properly print 'resource_size_t' type variables.
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Currently we do a bunch of per-message validation and initialisation in
__spi_async() which is called with the bus lock held. Since none of this
validation depends on the current bus status there's no need to hold the
lock to do it so split it out into a separate __spi_validate() function
which is called prior to taking the bus lock.
This could be slightly neater but keep things simple for now to show the
code motion clearly.
Based on observations from Martin Sperl.
Signed-off-by: Mark Brown <broonie@linaro.org>
