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linux/drivers/mfd/88pm8607.c
Haojian Zhuang 4107da2a28 mfd: Add 88PM8607 driver 
This adds a core driver for 88PM8607 found in Marvell DKB development
platform. This driver is a proxy for all accesses to 88PM8607
sub-drivers which will be merged on top of this one, RTC, regulators,
battery and so on.

This chip is manufactured by Marvell.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-12-13 19:20:37 +01:00

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/*
* Base driver for Marvell 88PM8607
*
* Copyright (C) 2009 Marvell International Ltd.
* Haojian Zhuang <haojian.zhuang@marvell.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/mfd/88pm8607.h>
#define PM8607_REG_RESOURCE(_start, _end) \
{ \
.start = PM8607_##_start, \
.end = PM8607_##_end, \
.flags = IORESOURCE_IO, \
}
static struct resource pm8607_regulator_resources[] = {
PM8607_REG_RESOURCE(BUCK1, BUCK1),
PM8607_REG_RESOURCE(BUCK2, BUCK2),
PM8607_REG_RESOURCE(BUCK3, BUCK3),
PM8607_REG_RESOURCE(LDO1, LDO1),
PM8607_REG_RESOURCE(LDO2, LDO2),
PM8607_REG_RESOURCE(LDO3, LDO3),
PM8607_REG_RESOURCE(LDO4, LDO4),
PM8607_REG_RESOURCE(LDO5, LDO5),
PM8607_REG_RESOURCE(LDO6, LDO6),
PM8607_REG_RESOURCE(LDO7, LDO7),
PM8607_REG_RESOURCE(LDO8, LDO8),
PM8607_REG_RESOURCE(LDO9, LDO9),
PM8607_REG_RESOURCE(LDO10, LDO10),
PM8607_REG_RESOURCE(LDO12, LDO12),
PM8607_REG_RESOURCE(LDO14, LDO14),
};
#define PM8607_REG_DEVS(_name, _id) \
{ \
.name = "88pm8607-" #_name, \
.num_resources = 1, \
.resources = &pm8607_regulator_resources[PM8607_ID_##_id], \
}
static struct mfd_cell pm8607_devs[] = {
PM8607_REG_DEVS(buck1, BUCK1),
PM8607_REG_DEVS(buck2, BUCK2),
PM8607_REG_DEVS(buck3, BUCK3),
PM8607_REG_DEVS(ldo1, LDO1),
PM8607_REG_DEVS(ldo2, LDO2),
PM8607_REG_DEVS(ldo3, LDO3),
PM8607_REG_DEVS(ldo4, LDO4),
PM8607_REG_DEVS(ldo5, LDO5),
PM8607_REG_DEVS(ldo6, LDO6),
PM8607_REG_DEVS(ldo7, LDO7),
PM8607_REG_DEVS(ldo8, LDO8),
PM8607_REG_DEVS(ldo9, LDO9),
PM8607_REG_DEVS(ldo10, LDO10),
PM8607_REG_DEVS(ldo12, LDO12),
PM8607_REG_DEVS(ldo14, LDO14),
};
static inline int pm8607_read_device(struct pm8607_chip *chip,
int reg, int bytes, void *dest)
{
struct i2c_client *i2c = chip->client;
unsigned char data;
int ret;
data = (unsigned char)reg;
ret = i2c_master_send(i2c, &data, 1);
if (ret < 0)
return ret;
ret = i2c_master_recv(i2c, dest, bytes);
if (ret < 0)
return ret;
return 0;
}
static inline int pm8607_write_device(struct pm8607_chip *chip,
int reg, int bytes, void *src)
{
struct i2c_client *i2c = chip->client;
unsigned char buf[bytes + 1];
int ret;
buf[0] = (unsigned char)reg;
memcpy(&buf[1], src, bytes);
ret = i2c_master_send(i2c, buf, bytes + 1);
if (ret < 0)
return ret;
return 0;
}
int pm8607_reg_read(struct pm8607_chip *chip, int reg)
{
unsigned char data;
int ret;
mutex_lock(&chip->io_lock);
ret = chip->read(chip, reg, 1, &data);
mutex_unlock(&chip->io_lock);
if (ret < 0)
return ret;
else
return (int)data;
}
EXPORT_SYMBOL(pm8607_reg_read);
int pm8607_reg_write(struct pm8607_chip *chip, int reg,
unsigned char data)
{
int ret;
mutex_lock(&chip->io_lock);
ret = chip->write(chip, reg, 1, &data);
mutex_unlock(&chip->io_lock);
return ret;
}
EXPORT_SYMBOL(pm8607_reg_write);
int pm8607_bulk_read(struct pm8607_chip *chip, int reg,
int count, unsigned char *buf)
{
int ret;
mutex_lock(&chip->io_lock);
ret = chip->read(chip, reg, count, buf);
mutex_unlock(&chip->io_lock);
return ret;
}
EXPORT_SYMBOL(pm8607_bulk_read);
int pm8607_bulk_write(struct pm8607_chip *chip, int reg,
int count, unsigned char *buf)
{
int ret;
mutex_lock(&chip->io_lock);
ret = chip->write(chip, reg, count, buf);
mutex_unlock(&chip->io_lock);
return ret;
}
EXPORT_SYMBOL(pm8607_bulk_write);
int pm8607_set_bits(struct pm8607_chip *chip, int reg,
unsigned char mask, unsigned char data)
{
unsigned char value;
int ret;
mutex_lock(&chip->io_lock);
ret = chip->read(chip, reg, 1, &value);
if (ret < 0)
goto out;
value &= ~mask;
value |= data;
ret = chip->write(chip, reg, 1, &value);
out:
mutex_unlock(&chip->io_lock);
return ret;
}
EXPORT_SYMBOL(pm8607_set_bits);
static const struct i2c_device_id pm8607_id_table[] = {
{ "88PM8607", 0 },
{}
};
MODULE_DEVICE_TABLE(i2c, pm8607_id_table);
static int __devinit pm8607_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct pm8607_platform_data *pdata = client->dev.platform_data;
struct pm8607_chip *chip;
int i, count;
int ret;
chip = kzalloc(sizeof(struct pm8607_chip), GFP_KERNEL);
if (chip == NULL)
return -ENOMEM;
chip->client = client;
chip->dev = &client->dev;
chip->read = pm8607_read_device;
chip->write = pm8607_write_device;
i2c_set_clientdata(client, chip);
mutex_init(&chip->io_lock);
dev_set_drvdata(chip->dev, chip);
ret = pm8607_reg_read(chip, PM8607_CHIP_ID);
if (ret < 0) {
dev_err(chip->dev, "Failed to read CHIP ID: %d\n", ret);
goto out;
}
if ((ret & CHIP_ID_MASK) == CHIP_ID)
dev_info(chip->dev, "Marvell 88PM8607 (ID: %02x) detected\n",
ret);
else {
dev_err(chip->dev, "Failed to detect Marvell 88PM8607. "
"Chip ID: %02x\n", ret);
goto out;
}
chip->chip_id = ret;
ret = pm8607_reg_read(chip, PM8607_BUCK3);
if (ret < 0) {
dev_err(chip->dev, "Failed to read BUCK3 register: %d\n", ret);
goto out;
}
if (ret & PM8607_BUCK3_DOUBLE)
chip->buck3_double = 1;
ret = pm8607_reg_read(chip, PM8607_MISC1);
if (ret < 0) {
dev_err(chip->dev, "Failed to read MISC1 register: %d\n", ret);
goto out;
}
if (pdata->i2c_port == PI2C_PORT)
ret |= PM8607_MISC1_PI2C;
else
ret &= ~PM8607_MISC1_PI2C;
ret = pm8607_reg_write(chip, PM8607_MISC1, ret);
if (ret < 0) {
dev_err(chip->dev, "Failed to write MISC1 register: %d\n", ret);
goto out;
}
count = ARRAY_SIZE(pm8607_devs);
for (i = 0; i < count; i++) {
ret = mfd_add_devices(chip->dev, i, &pm8607_devs[i],
1, NULL, 0);
if (ret != 0) {
dev_err(chip->dev, "Failed to add subdevs\n");
goto out;
}
}
return 0;
out:
i2c_set_clientdata(client, NULL);
kfree(chip);
return ret;
}
static int __devexit pm8607_remove(struct i2c_client *client)
{
struct pm8607_chip *chip = i2c_get_clientdata(client);
mfd_remove_devices(chip->dev);
kfree(chip);
return 0;
}
static struct i2c_driver pm8607_driver = {
.driver = {
.name = "88PM8607",
.owner = THIS_MODULE,
},
.probe = pm8607_probe,
.remove = __devexit_p(pm8607_remove),
.id_table = pm8607_id_table,
};
static int __init pm8607_init(void)
{
int ret;
ret = i2c_add_driver(&pm8607_driver);
if (ret != 0)
pr_err("Failed to register 88PM8607 I2C driver: %d\n", ret);
return ret;
}
subsys_initcall(pm8607_init);
static void __exit pm8607_exit(void)
{
i2c_del_driver(&pm8607_driver);
}
module_exit(pm8607_exit);
MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM8607");
MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
MODULE_LICENSE("GPL");
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