26aec009f6
This device tree support is added for PMIC block of S5m8767 multi function driver. The usage detail is added in the device tree documentation section. This change is tested on exynos5250 based arndale platform by regulator voltage set/get API's. Reviewed-by: Thomas Abraham <thomas.abraham@linaro.org> Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com> Tested-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
288 lines
6.6 KiB
C
288 lines
6.6 KiB
C
/*
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* sec-core.c
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*
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* Copyright (c) 2012 Samsung Electronics Co., Ltd
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* http://www.samsung.com
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/of_irq.h>
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#include <linux/interrupt.h>
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#include <linux/pm_runtime.h>
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#include <linux/mutex.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/samsung/core.h>
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#include <linux/mfd/samsung/irq.h>
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#include <linux/mfd/samsung/rtc.h>
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#include <linux/regmap.h>
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static struct mfd_cell s5m8751_devs[] = {
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{
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.name = "s5m8751-pmic",
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}, {
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.name = "s5m-charger",
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}, {
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.name = "s5m8751-codec",
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},
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};
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static struct mfd_cell s5m8763_devs[] = {
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{
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.name = "s5m8763-pmic",
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}, {
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.name = "s5m-rtc",
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}, {
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.name = "s5m-charger",
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},
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};
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static struct mfd_cell s5m8767_devs[] = {
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{
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.name = "s5m8767-pmic",
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}, {
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.name = "s5m-rtc",
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},
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};
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static struct mfd_cell s2mps11_devs[] = {
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{
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.name = "s2mps11-pmic",
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},
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};
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#ifdef CONFIG_OF
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static struct of_device_id sec_dt_match[] = {
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{ .compatible = "samsung,s5m8767-pmic",
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.data = (void *)S5M8767X,
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},
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{},
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};
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#endif
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int sec_reg_read(struct sec_pmic_dev *sec_pmic, u8 reg, void *dest)
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{
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return regmap_read(sec_pmic->regmap, reg, dest);
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}
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EXPORT_SYMBOL_GPL(sec_reg_read);
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int sec_bulk_read(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf)
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{
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return regmap_bulk_read(sec_pmic->regmap, reg, buf, count);
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}
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EXPORT_SYMBOL_GPL(sec_bulk_read);
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int sec_reg_write(struct sec_pmic_dev *sec_pmic, u8 reg, u8 value)
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{
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return regmap_write(sec_pmic->regmap, reg, value);
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}
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EXPORT_SYMBOL_GPL(sec_reg_write);
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int sec_bulk_write(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf)
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{
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return regmap_raw_write(sec_pmic->regmap, reg, buf, count);
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}
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EXPORT_SYMBOL_GPL(sec_bulk_write);
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int sec_reg_update(struct sec_pmic_dev *sec_pmic, u8 reg, u8 val, u8 mask)
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{
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return regmap_update_bits(sec_pmic->regmap, reg, mask, val);
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}
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EXPORT_SYMBOL_GPL(sec_reg_update);
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static struct regmap_config sec_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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#ifdef CONFIG_OF
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/*
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* Only the common platform data elements for s5m8767 are parsed here from the
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* device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
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* others have to parse their own platform data elements from device tree.
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*
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* The s5m8767 platform data structure is instantiated here and the drivers for
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* the sub-modules need not instantiate another instance while parsing their
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* platform data.
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*/
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static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
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struct device *dev)
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{
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struct sec_platform_data *pd;
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pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
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if (!pd) {
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dev_err(dev, "could not allocate memory for pdata\n");
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return ERR_PTR(-ENOMEM);
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}
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/*
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* ToDo: the 'wakeup' member in the platform data is more of a linux
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* specfic information. Hence, there is no binding for that yet and
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* not parsed here.
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*/
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return pd;
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}
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#else
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static struct sec_platform_data *sec_i2c_parse_dt_pdata(
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struct device *dev)
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{
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return 0;
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}
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#endif
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static inline int sec_i2c_get_driver_data(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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#ifdef CONFIG_OF
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if (i2c->dev.of_node) {
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const struct of_device_id *match;
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match = of_match_node(sec_dt_match, i2c->dev.of_node);
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return (int)match->data;
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}
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#endif
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return (int)id->driver_data;
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}
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static int sec_pmic_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct sec_platform_data *pdata = i2c->dev.platform_data;
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struct sec_pmic_dev *sec_pmic;
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int ret;
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sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
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GFP_KERNEL);
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if (sec_pmic == NULL)
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return -ENOMEM;
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i2c_set_clientdata(i2c, sec_pmic);
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sec_pmic->dev = &i2c->dev;
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sec_pmic->i2c = i2c;
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sec_pmic->irq = i2c->irq;
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sec_pmic->type = sec_i2c_get_driver_data(i2c, id);
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if (sec_pmic->dev->of_node) {
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pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev);
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if (IS_ERR(pdata)) {
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ret = PTR_ERR(pdata);
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return ret;
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}
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pdata->device_type = sec_pmic->type;
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}
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if (pdata) {
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sec_pmic->device_type = pdata->device_type;
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sec_pmic->ono = pdata->ono;
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sec_pmic->irq_base = pdata->irq_base;
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sec_pmic->wakeup = pdata->wakeup;
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sec_pmic->pdata = pdata;
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}
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sec_pmic->regmap = devm_regmap_init_i2c(i2c, &sec_regmap_config);
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if (IS_ERR(sec_pmic->regmap)) {
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ret = PTR_ERR(sec_pmic->regmap);
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dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
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ret);
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return ret;
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}
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sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
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i2c_set_clientdata(sec_pmic->rtc, sec_pmic);
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if (pdata && pdata->cfg_pmic_irq)
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pdata->cfg_pmic_irq();
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sec_irq_init(sec_pmic);
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pm_runtime_set_active(sec_pmic->dev);
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switch (sec_pmic->device_type) {
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case S5M8751X:
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ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs,
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ARRAY_SIZE(s5m8751_devs), NULL, 0, NULL);
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break;
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case S5M8763X:
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ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs,
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ARRAY_SIZE(s5m8763_devs), NULL, 0, NULL);
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break;
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case S5M8767X:
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ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs,
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ARRAY_SIZE(s5m8767_devs), NULL, 0, NULL);
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break;
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case S2MPS11X:
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ret = mfd_add_devices(sec_pmic->dev, -1, s2mps11_devs,
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ARRAY_SIZE(s2mps11_devs), NULL, 0, NULL);
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break;
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default:
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/* If this happens the probe function is problem */
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BUG();
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}
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if (ret < 0)
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goto err;
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return ret;
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err:
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mfd_remove_devices(sec_pmic->dev);
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sec_irq_exit(sec_pmic);
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i2c_unregister_device(sec_pmic->rtc);
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return ret;
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}
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static int sec_pmic_remove(struct i2c_client *i2c)
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{
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struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
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mfd_remove_devices(sec_pmic->dev);
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sec_irq_exit(sec_pmic);
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i2c_unregister_device(sec_pmic->rtc);
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return 0;
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}
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static const struct i2c_device_id sec_pmic_id[] = {
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{ "sec_pmic", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, sec_pmic_id);
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static struct i2c_driver sec_pmic_driver = {
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.driver = {
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.name = "sec_pmic",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(sec_dt_match),
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},
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.probe = sec_pmic_probe,
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.remove = sec_pmic_remove,
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.id_table = sec_pmic_id,
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};
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static int __init sec_pmic_init(void)
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{
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return i2c_add_driver(&sec_pmic_driver);
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}
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subsys_initcall(sec_pmic_init);
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static void __exit sec_pmic_exit(void)
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{
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i2c_del_driver(&sec_pmic_driver);
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}
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module_exit(sec_pmic_exit);
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MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
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MODULE_DESCRIPTION("Core support for the S5M MFD");
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MODULE_LICENSE("GPL");
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