64710af3e2
Add Flat Device Tree support to the AS3711 MFD driver. This patch just allows to bind the driver to I2C devices, instantiated from the DT. DT support for AS3711 cell drivers will be added in separate drivers. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com> Reviwed-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
237 lines
6 KiB
C
237 lines
6 KiB
C
/*
|
|
* AS3711 PMIC MFC driver
|
|
*
|
|
* Copyright (C) 2012 Renesas Electronics Corporation
|
|
* Author: Guennadi Liakhovetski, <g.liakhovetski@gmx.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the version 2 of the GNU General Public License as
|
|
* published by the Free Software Foundation
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/err.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mfd/as3711.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/module.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/slab.h>
|
|
|
|
enum {
|
|
AS3711_REGULATOR,
|
|
AS3711_BACKLIGHT,
|
|
};
|
|
|
|
/*
|
|
* Ok to have it static: it is only used during probing and multiple I2C devices
|
|
* cannot be probed simultaneously. Just make sure to avoid stale data.
|
|
*/
|
|
static struct mfd_cell as3711_subdevs[] = {
|
|
[AS3711_REGULATOR] = {.name = "as3711-regulator",},
|
|
[AS3711_BACKLIGHT] = {.name = "as3711-backlight",},
|
|
};
|
|
|
|
static bool as3711_volatile_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case AS3711_GPIO_SIGNAL_IN:
|
|
case AS3711_INTERRUPT_STATUS_1:
|
|
case AS3711_INTERRUPT_STATUS_2:
|
|
case AS3711_INTERRUPT_STATUS_3:
|
|
case AS3711_CHARGER_STATUS_1:
|
|
case AS3711_CHARGER_STATUS_2:
|
|
case AS3711_REG_STATUS:
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool as3711_precious_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case AS3711_INTERRUPT_STATUS_1:
|
|
case AS3711_INTERRUPT_STATUS_2:
|
|
case AS3711_INTERRUPT_STATUS_3:
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool as3711_readable_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case AS3711_SD_1_VOLTAGE:
|
|
case AS3711_SD_2_VOLTAGE:
|
|
case AS3711_SD_3_VOLTAGE:
|
|
case AS3711_SD_4_VOLTAGE:
|
|
case AS3711_LDO_1_VOLTAGE:
|
|
case AS3711_LDO_2_VOLTAGE:
|
|
case AS3711_LDO_3_VOLTAGE:
|
|
case AS3711_LDO_4_VOLTAGE:
|
|
case AS3711_LDO_5_VOLTAGE:
|
|
case AS3711_LDO_6_VOLTAGE:
|
|
case AS3711_LDO_7_VOLTAGE:
|
|
case AS3711_LDO_8_VOLTAGE:
|
|
case AS3711_SD_CONTROL:
|
|
case AS3711_GPIO_SIGNAL_OUT:
|
|
case AS3711_GPIO_SIGNAL_IN:
|
|
case AS3711_SD_CONTROL_1:
|
|
case AS3711_SD_CONTROL_2:
|
|
case AS3711_CURR_CONTROL:
|
|
case AS3711_CURR1_VALUE:
|
|
case AS3711_CURR2_VALUE:
|
|
case AS3711_CURR3_VALUE:
|
|
case AS3711_STEPUP_CONTROL_1:
|
|
case AS3711_STEPUP_CONTROL_2:
|
|
case AS3711_STEPUP_CONTROL_4:
|
|
case AS3711_STEPUP_CONTROL_5:
|
|
case AS3711_REG_STATUS:
|
|
case AS3711_INTERRUPT_STATUS_1:
|
|
case AS3711_INTERRUPT_STATUS_2:
|
|
case AS3711_INTERRUPT_STATUS_3:
|
|
case AS3711_CHARGER_STATUS_1:
|
|
case AS3711_CHARGER_STATUS_2:
|
|
case AS3711_ASIC_ID_1:
|
|
case AS3711_ASIC_ID_2:
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static const struct regmap_config as3711_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.volatile_reg = as3711_volatile_reg,
|
|
.readable_reg = as3711_readable_reg,
|
|
.precious_reg = as3711_precious_reg,
|
|
.max_register = AS3711_MAX_REGS,
|
|
.num_reg_defaults_raw = AS3711_MAX_REGS,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
};
|
|
|
|
#ifdef CONFIG_OF
|
|
static struct of_device_id as3711_of_match[] = {
|
|
{.compatible = "ams,as3711",},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, as3711_of_match);
|
|
#endif
|
|
|
|
static int as3711_i2c_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct as3711 *as3711;
|
|
struct as3711_platform_data *pdata;
|
|
unsigned int id1, id2;
|
|
int ret;
|
|
|
|
if (!client->dev.of_node) {
|
|
pdata = client->dev.platform_data;
|
|
if (!pdata)
|
|
dev_dbg(&client->dev, "Platform data not found\n");
|
|
} else {
|
|
pdata = devm_kzalloc(&client->dev,
|
|
sizeof(*pdata), GFP_KERNEL);
|
|
if (!pdata) {
|
|
dev_err(&client->dev, "Failed to allocate pdata\n");
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
as3711 = devm_kzalloc(&client->dev, sizeof(struct as3711), GFP_KERNEL);
|
|
if (!as3711) {
|
|
dev_err(&client->dev, "Memory allocation failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
as3711->dev = &client->dev;
|
|
i2c_set_clientdata(client, as3711);
|
|
|
|
if (client->irq)
|
|
dev_notice(&client->dev, "IRQ not supported yet\n");
|
|
|
|
as3711->regmap = devm_regmap_init_i2c(client, &as3711_regmap_config);
|
|
if (IS_ERR(as3711->regmap)) {
|
|
ret = PTR_ERR(as3711->regmap);
|
|
dev_err(&client->dev, "regmap initialization failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = regmap_read(as3711->regmap, AS3711_ASIC_ID_1, &id1);
|
|
if (!ret)
|
|
ret = regmap_read(as3711->regmap, AS3711_ASIC_ID_2, &id2);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "regmap_read() failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
if (id1 != 0x8b)
|
|
return -ENODEV;
|
|
dev_info(as3711->dev, "AS3711 detected: %x:%x\n", id1, id2);
|
|
|
|
/* We can reuse as3711_subdevs[], it will be copied in mfd_add_devices() */
|
|
if (pdata) {
|
|
as3711_subdevs[AS3711_REGULATOR].platform_data = &pdata->regulator;
|
|
as3711_subdevs[AS3711_REGULATOR].pdata_size = sizeof(pdata->regulator);
|
|
as3711_subdevs[AS3711_BACKLIGHT].platform_data = &pdata->backlight;
|
|
as3711_subdevs[AS3711_BACKLIGHT].pdata_size = sizeof(pdata->backlight);
|
|
} else {
|
|
as3711_subdevs[AS3711_REGULATOR].platform_data = NULL;
|
|
as3711_subdevs[AS3711_REGULATOR].pdata_size = 0;
|
|
as3711_subdevs[AS3711_BACKLIGHT].platform_data = NULL;
|
|
as3711_subdevs[AS3711_BACKLIGHT].pdata_size = 0;
|
|
}
|
|
|
|
ret = mfd_add_devices(as3711->dev, -1, as3711_subdevs,
|
|
ARRAY_SIZE(as3711_subdevs), NULL, 0, NULL);
|
|
if (ret < 0)
|
|
dev_err(&client->dev, "add mfd devices failed: %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int as3711_i2c_remove(struct i2c_client *client)
|
|
{
|
|
struct as3711 *as3711 = i2c_get_clientdata(client);
|
|
|
|
mfd_remove_devices(as3711->dev);
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id as3711_i2c_id[] = {
|
|
{.name = "as3711", .driver_data = 0},
|
|
{}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, as3711_i2c_id);
|
|
|
|
static struct i2c_driver as3711_i2c_driver = {
|
|
.driver = {
|
|
.name = "as3711",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = of_match_ptr(as3711_of_match),
|
|
},
|
|
.probe = as3711_i2c_probe,
|
|
.remove = as3711_i2c_remove,
|
|
.id_table = as3711_i2c_id,
|
|
};
|
|
|
|
static int __init as3711_i2c_init(void)
|
|
{
|
|
return i2c_add_driver(&as3711_i2c_driver);
|
|
}
|
|
/* Initialise early */
|
|
subsys_initcall(as3711_i2c_init);
|
|
|
|
static void __exit as3711_i2c_exit(void)
|
|
{
|
|
i2c_del_driver(&as3711_i2c_driver);
|
|
}
|
|
module_exit(as3711_i2c_exit);
|
|
|
|
MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
|
|
MODULE_DESCRIPTION("AS3711 PMIC driver");
|
|
MODULE_LICENSE("GPL v2");
|