mfd: New AB8500 driver
Add a new driver to support the AB8500 Power Management chip, replacing the current AB4500. The new driver replaces the old one, instead of an incremental modification, because this is a substantial overhaul including: - Split of the driver into -core and -spi portions, to allow another interface layer to be added - Addition of interrupt support - Switch to MFD core API for handling subdevices - Simplification of the APIs to remove a redundant block parameter - Rename of the APIs and macros from ab4500_* to ab8500_* - Rename of the files from ab4500* to ab8500* - Change of the driver name from ab4500 to ab8500 Acked-by: Linus Walleij <linus.walleij@stericsson.com> Acked-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
このコミットが含まれているのは:
Rabin Vincent
@@ -420,11 +420,12 @@ config EZX_PCAP
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This enables the PCAP ASIC present on EZX Phones. This is
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needed for MMC, TouchScreen, Sound, USB, etc..
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config AB4500_CORE
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tristate "ST-Ericsson's AB4500 Mixed Signal Power management chip"
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depends on SPI
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config AB8500_CORE
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bool "ST-Ericsson AB8500 Mixed Signal Power Management chip"
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depends on SPI=y && GENERIC_HARDIRQS
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select MFD_CORE
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help
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Select this option to enable access to AB4500 power management
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Select this option to enable access to AB8500 power management
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chip. This connects to U8500 on the SSP/SPI bus and exports
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read/write functions for the devices to get access to this chip.
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This chip embeds various other multimedia funtionalities as well.
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@@ -64,8 +64,8 @@ obj-$(CONFIG_PCF50633_GPIO) += pcf50633-gpio.o
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obj-$(CONFIG_ABX500_CORE) += abx500-core.o
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obj-$(CONFIG_AB3100_CORE) += ab3100-core.o
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obj-$(CONFIG_AB3100_OTP) += ab3100-otp.o
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obj-$(CONFIG_AB4500_CORE) += ab4500-core.o
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obj-$(CONFIG_AB3550_CORE) += ab3550-core.o
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obj-$(CONFIG_AB8500_CORE) += ab8500-core.o ab8500-spi.o
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obj-$(CONFIG_MFD_TIMBERDALE) += timberdale.o
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obj-$(CONFIG_PMIC_ADP5520) += adp5520.o
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obj-$(CONFIG_LPC_SCH) += lpc_sch.o
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@@ -1,209 +0,0 @@
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/*
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* Copyright (C) 2009 ST-Ericsson
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*
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* Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
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*
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* This program is free software; you can redistribute it
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* and/or modify it under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation.
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*
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* AB4500 is a companion power management chip used with U8500.
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* On this platform, this is interfaced with SSP0 controller
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* which is a ARM primecell pl022.
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*
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* At the moment the module just exports read/write features.
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* Interrupt management to be added - TODO.
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/spi/spi.h>
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#include <linux/mfd/ab4500.h>
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/* just required if probe fails, we need to
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* unregister the device
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*/
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static struct spi_driver ab4500_driver;
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/*
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* This funtion writes to any AB4500 registers using
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* SPI protocol & before it writes it packs the data
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* in the below 24 bit frame format
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*
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* *|------------------------------------|
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* *| 23|22...18|17.......10|9|8|7......0|
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* *| r/w bank adr data |
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* * ------------------------------------
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*
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* This function shouldn't be called from interrupt
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* context
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*/
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int ab4500_write(struct ab4500 *ab4500, unsigned char block,
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unsigned long addr, unsigned char data)
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{
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struct spi_transfer xfer;
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struct spi_message msg;
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int err;
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unsigned long spi_data =
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block << 18 | addr << 10 | data;
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mutex_lock(&ab4500->lock);
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ab4500->tx_buf[0] = spi_data;
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ab4500->rx_buf[0] = 0;
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xfer.tx_buf = ab4500->tx_buf;
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xfer.rx_buf = NULL;
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xfer.len = sizeof(unsigned long);
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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err = spi_sync(ab4500->spi, &msg);
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mutex_unlock(&ab4500->lock);
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return err;
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}
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EXPORT_SYMBOL(ab4500_write);
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int ab4500_read(struct ab4500 *ab4500, unsigned char block,
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unsigned long addr)
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{
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struct spi_transfer xfer;
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struct spi_message msg;
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unsigned long spi_data =
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1 << 23 | block << 18 | addr << 10;
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mutex_lock(&ab4500->lock);
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ab4500->tx_buf[0] = spi_data;
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ab4500->rx_buf[0] = 0;
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xfer.tx_buf = ab4500->tx_buf;
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xfer.rx_buf = ab4500->rx_buf;
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xfer.len = sizeof(unsigned long);
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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spi_sync(ab4500->spi, &msg);
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mutex_unlock(&ab4500->lock);
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return ab4500->rx_buf[0];
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}
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EXPORT_SYMBOL(ab4500_read);
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/* ref: ab3100 core */
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#define AB4500_DEVICE(devname, devid) \
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static struct platform_device ab4500_##devname##_device = { \
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.name = devid, \
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.id = -1, \
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}
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/* list of childern devices of ab4500 - all are
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* not populated here - TODO
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*/
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AB4500_DEVICE(charger, "ab4500-charger");
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AB4500_DEVICE(audio, "ab4500-audio");
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AB4500_DEVICE(usb, "ab4500-usb");
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AB4500_DEVICE(tvout, "ab4500-tvout");
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AB4500_DEVICE(sim, "ab4500-sim");
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AB4500_DEVICE(gpadc, "ab4500-gpadc");
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AB4500_DEVICE(clkmgt, "ab4500-clkmgt");
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AB4500_DEVICE(misc, "ab4500-misc");
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static struct platform_device *ab4500_platform_devs[] = {
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&ab4500_charger_device,
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&ab4500_audio_device,
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&ab4500_usb_device,
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&ab4500_tvout_device,
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&ab4500_sim_device,
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&ab4500_gpadc_device,
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&ab4500_clkmgt_device,
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&ab4500_misc_device,
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};
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static int __init ab4500_probe(struct spi_device *spi)
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{
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struct ab4500 *ab4500;
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unsigned char revision;
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int err = 0;
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int i;
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ab4500 = kzalloc(sizeof *ab4500, GFP_KERNEL);
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if (!ab4500) {
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dev_err(&spi->dev, "could not allocate AB4500\n");
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err = -ENOMEM;
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goto not_detect;
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}
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ab4500->spi = spi;
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spi_set_drvdata(spi, ab4500);
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mutex_init(&ab4500->lock);
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/* read the revision register */
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revision = ab4500_read(ab4500, AB4500_MISC, AB4500_REV_REG);
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/* revision id 0x0 is for early drop, 0x10 is for cut1.0 */
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if (revision == 0x0 || revision == 0x10)
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dev_info(&spi->dev, "Detected chip: %s, revision = %x\n",
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ab4500_driver.driver.name, revision);
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else {
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dev_err(&spi->dev, "unknown chip: 0x%x\n", revision);
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goto not_detect;
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}
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for (i = 0; i < ARRAY_SIZE(ab4500_platform_devs); i++) {
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ab4500_platform_devs[i]->dev.parent =
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&spi->dev;
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platform_set_drvdata(ab4500_platform_devs[i], ab4500);
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}
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/* register the ab4500 platform devices */
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platform_add_devices(ab4500_platform_devs,
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ARRAY_SIZE(ab4500_platform_devs));
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return err;
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not_detect:
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spi_unregister_driver(&ab4500_driver);
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kfree(ab4500);
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return err;
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}
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static int __devexit ab4500_remove(struct spi_device *spi)
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{
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struct ab4500 *ab4500 =
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spi_get_drvdata(spi);
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kfree(ab4500);
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return 0;
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}
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static struct spi_driver ab4500_driver = {
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.driver = {
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.name = "ab4500",
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.owner = THIS_MODULE,
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},
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.probe = ab4500_probe,
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.remove = __devexit_p(ab4500_remove)
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};
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static int __devinit ab4500_init(void)
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{
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return spi_register_driver(&ab4500_driver);
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}
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static void __exit ab4500_exit(void)
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{
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spi_unregister_driver(&ab4500_driver);
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}
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subsys_initcall(ab4500_init);
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module_exit(ab4500_exit);
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MODULE_AUTHOR("Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com");
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MODULE_DESCRIPTION("AB4500 core driver");
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MODULE_LICENSE("GPL");
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444
drivers/mfd/ab8500-core.c
ノーマルファイル
444
drivers/mfd/ab8500-core.c
ノーマルファイル
@@ -0,0 +1,444 @@
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/*
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* Copyright (C) ST-Ericsson SA 2010
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*
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* License Terms: GNU General Public License v2
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* Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
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* Author: Rabin Vincent <rabin.vincent@stericsson.com>
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/irq.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/ab8500.h>
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/*
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* Interrupt register offsets
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* Bank : 0x0E
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*/
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#define AB8500_IT_SOURCE1_REG 0x0E00
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#define AB8500_IT_SOURCE2_REG 0x0E01
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#define AB8500_IT_SOURCE3_REG 0x0E02
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#define AB8500_IT_SOURCE4_REG 0x0E03
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#define AB8500_IT_SOURCE5_REG 0x0E04
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#define AB8500_IT_SOURCE6_REG 0x0E05
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#define AB8500_IT_SOURCE7_REG 0x0E06
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#define AB8500_IT_SOURCE8_REG 0x0E07
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#define AB8500_IT_SOURCE19_REG 0x0E12
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#define AB8500_IT_SOURCE20_REG 0x0E13
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#define AB8500_IT_SOURCE21_REG 0x0E14
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#define AB8500_IT_SOURCE22_REG 0x0E15
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#define AB8500_IT_SOURCE23_REG 0x0E16
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#define AB8500_IT_SOURCE24_REG 0x0E17
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/*
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* latch registers
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*/
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#define AB8500_IT_LATCH1_REG 0x0E20
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#define AB8500_IT_LATCH2_REG 0x0E21
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#define AB8500_IT_LATCH3_REG 0x0E22
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#define AB8500_IT_LATCH4_REG 0x0E23
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#define AB8500_IT_LATCH5_REG 0x0E24
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#define AB8500_IT_LATCH6_REG 0x0E25
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#define AB8500_IT_LATCH7_REG 0x0E26
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#define AB8500_IT_LATCH8_REG 0x0E27
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#define AB8500_IT_LATCH9_REG 0x0E28
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#define AB8500_IT_LATCH10_REG 0x0E29
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#define AB8500_IT_LATCH19_REG 0x0E32
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#define AB8500_IT_LATCH20_REG 0x0E33
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#define AB8500_IT_LATCH21_REG 0x0E34
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#define AB8500_IT_LATCH22_REG 0x0E35
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#define AB8500_IT_LATCH23_REG 0x0E36
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#define AB8500_IT_LATCH24_REG 0x0E37
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/*
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* mask registers
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*/
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#define AB8500_IT_MASK1_REG 0x0E40
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#define AB8500_IT_MASK2_REG 0x0E41
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#define AB8500_IT_MASK3_REG 0x0E42
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#define AB8500_IT_MASK4_REG 0x0E43
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#define AB8500_IT_MASK5_REG 0x0E44
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#define AB8500_IT_MASK6_REG 0x0E45
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#define AB8500_IT_MASK7_REG 0x0E46
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#define AB8500_IT_MASK8_REG 0x0E47
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#define AB8500_IT_MASK9_REG 0x0E48
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#define AB8500_IT_MASK10_REG 0x0E49
|
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#define AB8500_IT_MASK11_REG 0x0E4A
|
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#define AB8500_IT_MASK12_REG 0x0E4B
|
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#define AB8500_IT_MASK13_REG 0x0E4C
|
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#define AB8500_IT_MASK14_REG 0x0E4D
|
||||
#define AB8500_IT_MASK15_REG 0x0E4E
|
||||
#define AB8500_IT_MASK16_REG 0x0E4F
|
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#define AB8500_IT_MASK17_REG 0x0E50
|
||||
#define AB8500_IT_MASK18_REG 0x0E51
|
||||
#define AB8500_IT_MASK19_REG 0x0E52
|
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#define AB8500_IT_MASK20_REG 0x0E53
|
||||
#define AB8500_IT_MASK21_REG 0x0E54
|
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#define AB8500_IT_MASK22_REG 0x0E55
|
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#define AB8500_IT_MASK23_REG 0x0E56
|
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#define AB8500_IT_MASK24_REG 0x0E57
|
||||
|
||||
#define AB8500_REV_REG 0x1080
|
||||
|
||||
/*
|
||||
* Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
|
||||
* numbers are indexed into this array with (num / 8).
|
||||
*
|
||||
* This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at
|
||||
* offset 0.
|
||||
*/
|
||||
static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = {
|
||||
0, 1, 2, 3, 4, 6, 7, 8, 9, 18, 19, 20, 21,
|
||||
};
|
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|
||||
static int __ab8500_write(struct ab8500 *ab8500, u16 addr, u8 data)
|
||||
{
|
||||
int ret;
|
||||
|
||||
dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data);
|
||||
|
||||
ret = ab8500->write(ab8500, addr, data);
|
||||
if (ret < 0)
|
||||
dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
|
||||
addr, ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* ab8500_write() - write an AB8500 register
|
||||
* @ab8500: device to write to
|
||||
* @addr: address of the register
|
||||
* @data: value to write
|
||||
*/
|
||||
int ab8500_write(struct ab8500 *ab8500, u16 addr, u8 data)
|
||||
{
|
||||
int ret;
|
||||
|
||||
mutex_lock(&ab8500->lock);
|
||||
ret = __ab8500_write(ab8500, addr, data);
|
||||
mutex_unlock(&ab8500->lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(ab8500_write);
|
||||
|
||||
static int __ab8500_read(struct ab8500 *ab8500, u16 addr)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = ab8500->read(ab8500, addr);
|
||||
if (ret < 0)
|
||||
dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
|
||||
addr, ret);
|
||||
|
||||
dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* ab8500_read() - read an AB8500 register
|
||||
* @ab8500: device to read from
|
||||
* @addr: address of the register
|
||||
*/
|
||||
int ab8500_read(struct ab8500 *ab8500, u16 addr)
|
||||
{
|
||||
int ret;
|
||||
|
||||
mutex_lock(&ab8500->lock);
|
||||
ret = __ab8500_read(ab8500, addr);
|
||||
mutex_unlock(&ab8500->lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(ab8500_read);
|
||||
|
||||
/**
|
||||
* ab8500_set_bits() - set a bitfield in an AB8500 register
|
||||
* @ab8500: device to read from
|
||||
* @addr: address of the register
|
||||
* @mask: mask of the bitfield to modify
|
||||
* @data: value to set to the bitfield
|
||||
*/
|
||||
int ab8500_set_bits(struct ab8500 *ab8500, u16 addr, u8 mask, u8 data)
|
||||
{
|
||||
int ret;
|
||||
|
||||
mutex_lock(&ab8500->lock);
|
||||
|
||||
ret = __ab8500_read(ab8500, addr);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
ret &= ~mask;
|
||||
ret |= data;
|
||||
|
||||
ret = __ab8500_write(ab8500, addr, ret);
|
||||
|
||||
out:
|
||||
mutex_unlock(&ab8500->lock);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(ab8500_set_bits);
|
||||
|
||||
static void ab8500_irq_lock(unsigned int irq)
|
||||
{
|
||||
struct ab8500 *ab8500 = get_irq_chip_data(irq);
|
||||
|
||||
mutex_lock(&ab8500->irq_lock);
|
||||
}
|
||||
|
||||
static void ab8500_irq_sync_unlock(unsigned int irq)
|
||||
{
|
||||
struct ab8500 *ab8500 = get_irq_chip_data(irq);
|
||||
int i;
|
||||
|
||||
for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) {
|
||||
u8 old = ab8500->oldmask[i];
|
||||
u8 new = ab8500->mask[i];
|
||||
int reg;
|
||||
|
||||
if (new == old)
|
||||
continue;
|
||||
|
||||
ab8500->oldmask[i] = new;
|
||||
|
||||
reg = AB8500_IT_MASK1_REG + ab8500_irq_regoffset[i];
|
||||
ab8500_write(ab8500, reg, new);
|
||||
}
|
||||
|
||||
mutex_unlock(&ab8500->irq_lock);
|
||||
}
|
||||
|
||||
static void ab8500_irq_mask(unsigned int irq)
|
||||
{
|
||||
struct ab8500 *ab8500 = get_irq_chip_data(irq);
|
||||
int offset = irq - ab8500->irq_base;
|
||||
int index = offset / 8;
|
||||
int mask = 1 << (offset % 8);
|
||||
|
||||
ab8500->mask[index] |= mask;
|
||||
}
|
||||
|
||||
static void ab8500_irq_unmask(unsigned int irq)
|
||||
{
|
||||
struct ab8500 *ab8500 = get_irq_chip_data(irq);
|
||||
int offset = irq - ab8500->irq_base;
|
||||
int index = offset / 8;
|
||||
int mask = 1 << (offset % 8);
|
||||
|
||||
ab8500->mask[index] &= ~mask;
|
||||
}
|
||||
|
||||
static struct irq_chip ab8500_irq_chip = {
|
||||
.name = "ab8500",
|
||||
.bus_lock = ab8500_irq_lock,
|
||||
.bus_sync_unlock = ab8500_irq_sync_unlock,
|
||||
.mask = ab8500_irq_mask,
|
||||
.unmask = ab8500_irq_unmask,
|
||||
};
|
||||
|
||||
static irqreturn_t ab8500_irq(int irq, void *dev)
|
||||
{
|
||||
struct ab8500 *ab8500 = dev;
|
||||
int i;
|
||||
|
||||
dev_vdbg(ab8500->dev, "interrupt\n");
|
||||
|
||||
for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) {
|
||||
int regoffset = ab8500_irq_regoffset[i];
|
||||
int status;
|
||||
|
||||
status = ab8500_read(ab8500, AB8500_IT_LATCH1_REG + regoffset);
|
||||
if (status <= 0)
|
||||
continue;
|
||||
|
||||
do {
|
||||
int bit = __ffs(status);
|
||||
int line = i * 8 + bit;
|
||||
|
||||
handle_nested_irq(ab8500->irq_base + line);
|
||||
status &= ~(1 << bit);
|
||||
} while (status);
|
||||
}
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int ab8500_irq_init(struct ab8500 *ab8500)
|
||||
{
|
||||
int base = ab8500->irq_base;
|
||||
int irq;
|
||||
|
||||
for (irq = base; irq < base + AB8500_NR_IRQS; irq++) {
|
||||
set_irq_chip_data(irq, ab8500);
|
||||
set_irq_chip_and_handler(irq, &ab8500_irq_chip,
|
||||
handle_simple_irq);
|
||||
set_irq_nested_thread(irq, 1);
|
||||
#ifdef CONFIG_ARM
|
||||
set_irq_flags(irq, IRQF_VALID);
|
||||
#else
|
||||
set_irq_noprobe(irq);
|
||||
#endif
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void ab8500_irq_remove(struct ab8500 *ab8500)
|
||||
{
|
||||
int base = ab8500->irq_base;
|
||||
int irq;
|
||||
|
||||
for (irq = base; irq < base + AB8500_NR_IRQS; irq++) {
|
||||
#ifdef CONFIG_ARM
|
||||
set_irq_flags(irq, 0);
|
||||
#endif
|
||||
set_irq_chip_and_handler(irq, NULL, NULL);
|
||||
set_irq_chip_data(irq, NULL);
|
||||
}
|
||||
}
|
||||
|
||||
static struct resource ab8500_gpadc_resources[] = {
|
||||
{
|
||||
.name = "HW_CONV_END",
|
||||
.start = AB8500_INT_GP_HW_ADC_CONV_END,
|
||||
.end = AB8500_INT_GP_HW_ADC_CONV_END,
|
||||
.flags = IORESOURCE_IRQ,
|
||||
},
|
||||
{
|
||||
.name = "SW_CONV_END",
|
||||
.start = AB8500_INT_GP_SW_ADC_CONV_END,
|
||||
.end = AB8500_INT_GP_SW_ADC_CONV_END,
|
||||
.flags = IORESOURCE_IRQ,
|
||||
},
|
||||
};
|
||||
|
||||
static struct resource ab8500_rtc_resources[] = {
|
||||
{
|
||||
.name = "60S",
|
||||
.start = AB8500_INT_RTC_60S,
|
||||
.end = AB8500_INT_RTC_60S,
|
||||
.flags = IORESOURCE_IRQ,
|
||||
},
|
||||
{
|
||||
.name = "ALARM",
|
||||
.start = AB8500_INT_RTC_ALARM,
|
||||
.end = AB8500_INT_RTC_ALARM,
|
||||
.flags = IORESOURCE_IRQ,
|
||||
},
|
||||
};
|
||||
|
||||
static struct mfd_cell ab8500_devs[] = {
|
||||
{
|
||||
.name = "ab8500-gpadc",
|
||||
.num_resources = ARRAY_SIZE(ab8500_gpadc_resources),
|
||||
.resources = ab8500_gpadc_resources,
|
||||
},
|
||||
{
|
||||
.name = "ab8500-rtc",
|
||||
.num_resources = ARRAY_SIZE(ab8500_rtc_resources),
|
||||
.resources = ab8500_rtc_resources,
|
||||
},
|
||||
{ .name = "ab8500-charger", },
|
||||
{ .name = "ab8500-audio", },
|
||||
{ .name = "ab8500-usb", },
|
||||
{ .name = "ab8500-pwm", },
|
||||
};
|
||||
|
||||
int __devinit ab8500_init(struct ab8500 *ab8500)
|
||||
{
|
||||
struct ab8500_platform_data *plat = dev_get_platdata(ab8500->dev);
|
||||
int ret;
|
||||
int i;
|
||||
|
||||
if (plat)
|
||||
ab8500->irq_base = plat->irq_base;
|
||||
|
||||
mutex_init(&ab8500->lock);
|
||||
mutex_init(&ab8500->irq_lock);
|
||||
|
||||
ret = ab8500_read(ab8500, AB8500_REV_REG);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/*
|
||||
* 0x0 - Early Drop
|
||||
* 0x10 - Cut 1.0
|
||||
* 0x11 - Cut 1.1
|
||||
*/
|
||||
if (ret == 0x0 || ret == 0x10 || ret == 0x11) {
|
||||
ab8500->revision = ret;
|
||||
dev_info(ab8500->dev, "detected chip, revision: %#x\n", ret);
|
||||
} else {
|
||||
dev_err(ab8500->dev, "unknown chip, revision: %#x\n", ret);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (plat && plat->init)
|
||||
plat->init(ab8500);
|
||||
|
||||
/* Clear and mask all interrupts */
|
||||
for (i = 0; i < 10; i++) {
|
||||
ab8500_read(ab8500, AB8500_IT_LATCH1_REG + i);
|
||||
ab8500_write(ab8500, AB8500_IT_MASK1_REG + i, 0xff);
|
||||
}
|
||||
|
||||
for (i = 18; i < 24; i++) {
|
||||
ab8500_read(ab8500, AB8500_IT_LATCH1_REG + i);
|
||||
ab8500_write(ab8500, AB8500_IT_MASK1_REG + i, 0xff);
|
||||
}
|
||||
|
||||
for (i = 0; i < AB8500_NUM_IRQ_REGS; i++)
|
||||
ab8500->mask[i] = ab8500->oldmask[i] = 0xff;
|
||||
|
||||
if (ab8500->irq_base) {
|
||||
ret = ab8500_irq_init(ab8500);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = request_threaded_irq(ab8500->irq, NULL, ab8500_irq,
|
||||
IRQF_ONESHOT, "ab8500", ab8500);
|
||||
if (ret)
|
||||
goto out_removeirq;
|
||||
}
|
||||
|
||||
ret = mfd_add_devices(ab8500->dev, -1, ab8500_devs,
|
||||
ARRAY_SIZE(ab8500_devs), NULL,
|
||||
ab8500->irq_base);
|
||||
if (ret)
|
||||
goto out_freeirq;
|
||||
|
||||
return ret;
|
||||
|
||||
out_freeirq:
|
||||
if (ab8500->irq_base) {
|
||||
free_irq(ab8500->irq, ab8500);
|
||||
out_removeirq:
|
||||
ab8500_irq_remove(ab8500);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
int __devexit ab8500_exit(struct ab8500 *ab8500)
|
||||
{
|
||||
mfd_remove_devices(ab8500->dev);
|
||||
if (ab8500->irq_base) {
|
||||
free_irq(ab8500->irq, ab8500);
|
||||
ab8500_irq_remove(ab8500);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
MODULE_AUTHOR("Srinidhi Kasagar, Rabin Vincent");
|
||||
MODULE_DESCRIPTION("AB8500 MFD core");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
133
drivers/mfd/ab8500-spi.c
ノーマルファイル
133
drivers/mfd/ab8500-spi.c
ノーマルファイル
@@ -0,0 +1,133 @@
|
||||
/*
|
||||
* Copyright (C) ST-Ericsson SA 2010
|
||||
*
|
||||
* License Terms: GNU General Public License v2
|
||||
* Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/spi/spi.h>
|
||||
#include <linux/mfd/ab8500.h>
|
||||
|
||||
/*
|
||||
* This funtion writes to any AB8500 registers using
|
||||
* SPI protocol & before it writes it packs the data
|
||||
* in the below 24 bit frame format
|
||||
*
|
||||
* *|------------------------------------|
|
||||
* *| 23|22...18|17.......10|9|8|7......0|
|
||||
* *| r/w bank adr data |
|
||||
* * ------------------------------------
|
||||
*
|
||||
* This function shouldn't be called from interrupt
|
||||
* context
|
||||
*/
|
||||
static int ab8500_spi_write(struct ab8500 *ab8500, u16 addr, u8 data)
|
||||
{
|
||||
struct spi_device *spi = container_of(ab8500->dev, struct spi_device,
|
||||
dev);
|
||||
unsigned long spi_data = addr << 10 | data;
|
||||
struct spi_transfer xfer;
|
||||
struct spi_message msg;
|
||||
|
||||
ab8500->tx_buf[0] = spi_data;
|
||||
ab8500->rx_buf[0] = 0;
|
||||
|
||||
xfer.tx_buf = ab8500->tx_buf;
|
||||
xfer.rx_buf = NULL;
|
||||
xfer.len = sizeof(unsigned long);
|
||||
|
||||
spi_message_init(&msg);
|
||||
spi_message_add_tail(&xfer, &msg);
|
||||
|
||||
return spi_sync(spi, &msg);
|
||||
}
|
||||
|
||||
static int ab8500_spi_read(struct ab8500 *ab8500, u16 addr)
|
||||
{
|
||||
struct spi_device *spi = container_of(ab8500->dev, struct spi_device,
|
||||
dev);
|
||||
unsigned long spi_data = 1 << 23 | addr << 10;
|
||||
struct spi_transfer xfer;
|
||||
struct spi_message msg;
|
||||
int ret;
|
||||
|
||||
ab8500->tx_buf[0] = spi_data;
|
||||
ab8500->rx_buf[0] = 0;
|
||||
|
||||
xfer.tx_buf = ab8500->tx_buf;
|
||||
xfer.rx_buf = ab8500->rx_buf;
|
||||
xfer.len = sizeof(unsigned long);
|
||||
|
||||
spi_message_init(&msg);
|
||||
spi_message_add_tail(&xfer, &msg);
|
||||
|
||||
ret = spi_sync(spi, &msg);
|
||||
if (!ret)
|
||||
ret = ab8500->rx_buf[0];
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __devinit ab8500_spi_probe(struct spi_device *spi)
|
||||
{
|
||||
struct ab8500 *ab8500;
|
||||
int ret;
|
||||
|
||||
ab8500 = kzalloc(sizeof *ab8500, GFP_KERNEL);
|
||||
if (!ab8500)
|
||||
return -ENOMEM;
|
||||
|
||||
ab8500->dev = &spi->dev;
|
||||
ab8500->irq = spi->irq;
|
||||
|
||||
ab8500->read = ab8500_spi_read;
|
||||
ab8500->write = ab8500_spi_write;
|
||||
|
||||
spi_set_drvdata(spi, ab8500);
|
||||
|
||||
ret = ab8500_init(ab8500);
|
||||
if (ret)
|
||||
kfree(ab8500);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __devexit ab8500_spi_remove(struct spi_device *spi)
|
||||
{
|
||||
struct ab8500 *ab8500 = spi_get_drvdata(spi);
|
||||
|
||||
ab8500_exit(ab8500);
|
||||
kfree(ab8500);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct spi_driver ab8500_spi_driver = {
|
||||
.driver = {
|
||||
.name = "ab8500",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = ab8500_spi_probe,
|
||||
.remove = __devexit_p(ab8500_spi_remove)
|
||||
};
|
||||
|
||||
static int __init ab8500_spi_init(void)
|
||||
{
|
||||
return spi_register_driver(&ab8500_spi_driver);
|
||||
}
|
||||
subsys_initcall(ab8500_spi_init);
|
||||
|
||||
static void __exit ab8500_spi_exit(void)
|
||||
{
|
||||
spi_unregister_driver(&ab8500_spi_driver);
|
||||
}
|
||||
module_exit(ab8500_spi_exit);
|
||||
|
||||
MODULE_AUTHOR("Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com");
|
||||
MODULE_DESCRIPTION("AB8500 SPI");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
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