mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
![Jett.Zhou](/assets/img/avatar_default.png)
For 88pm860x pmic, it can wake the system from low power mode by irq, its sub-devs like RTC and onkey can be enabled for this usage. Signed-off-by: Jett.Zhou <jtzhou@marvell.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
390 lines
9.6 KiB
C
390 lines
9.6 KiB
C
/*
|
|
* I2C driver for Marvell 88PM860x
|
|
*
|
|
* 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/platform_device.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/err.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/mfd/88pm860x.h>
|
|
#include <linux/slab.h>
|
|
|
|
int pm860x_reg_read(struct i2c_client *i2c, int reg)
|
|
{
|
|
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
|
|
struct regmap *map = (i2c == chip->client) ? chip->regmap
|
|
: chip->regmap_companion;
|
|
unsigned int data;
|
|
int ret;
|
|
|
|
ret = regmap_read(map, reg, &data);
|
|
if (ret < 0)
|
|
return ret;
|
|
else
|
|
return (int)data;
|
|
}
|
|
EXPORT_SYMBOL(pm860x_reg_read);
|
|
|
|
int pm860x_reg_write(struct i2c_client *i2c, int reg,
|
|
unsigned char data)
|
|
{
|
|
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
|
|
struct regmap *map = (i2c == chip->client) ? chip->regmap
|
|
: chip->regmap_companion;
|
|
int ret;
|
|
|
|
ret = regmap_write(map, reg, data);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(pm860x_reg_write);
|
|
|
|
int pm860x_bulk_read(struct i2c_client *i2c, int reg,
|
|
int count, unsigned char *buf)
|
|
{
|
|
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
|
|
struct regmap *map = (i2c == chip->client) ? chip->regmap
|
|
: chip->regmap_companion;
|
|
int ret;
|
|
|
|
ret = regmap_raw_read(map, reg, buf, count);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(pm860x_bulk_read);
|
|
|
|
int pm860x_bulk_write(struct i2c_client *i2c, int reg,
|
|
int count, unsigned char *buf)
|
|
{
|
|
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
|
|
struct regmap *map = (i2c == chip->client) ? chip->regmap
|
|
: chip->regmap_companion;
|
|
int ret;
|
|
|
|
ret = regmap_raw_write(map, reg, buf, count);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(pm860x_bulk_write);
|
|
|
|
int pm860x_set_bits(struct i2c_client *i2c, int reg,
|
|
unsigned char mask, unsigned char data)
|
|
{
|
|
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
|
|
struct regmap *map = (i2c == chip->client) ? chip->regmap
|
|
: chip->regmap_companion;
|
|
int ret;
|
|
|
|
ret = regmap_update_bits(map, reg, mask, data);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(pm860x_set_bits);
|
|
|
|
static int read_device(struct i2c_client *i2c, int reg,
|
|
int bytes, void *dest)
|
|
{
|
|
unsigned char msgbuf0[I2C_SMBUS_BLOCK_MAX + 3];
|
|
unsigned char msgbuf1[I2C_SMBUS_BLOCK_MAX + 2];
|
|
struct i2c_adapter *adap = i2c->adapter;
|
|
struct i2c_msg msg[2] = {{i2c->addr, 0, 1, msgbuf0},
|
|
{i2c->addr, I2C_M_RD, 0, msgbuf1},
|
|
};
|
|
int num = 1, ret = 0;
|
|
|
|
if (dest == NULL)
|
|
return -EINVAL;
|
|
msgbuf0[0] = (unsigned char)reg; /* command */
|
|
msg[1].len = bytes;
|
|
|
|
/* if data needs to read back, num should be 2 */
|
|
if (bytes > 0)
|
|
num = 2;
|
|
ret = adap->algo->master_xfer(adap, msg, num);
|
|
memcpy(dest, msgbuf1, bytes);
|
|
if (ret < 0)
|
|
return ret;
|
|
return 0;
|
|
}
|
|
|
|
static int write_device(struct i2c_client *i2c, int reg,
|
|
int bytes, void *src)
|
|
{
|
|
unsigned char buf[bytes + 1];
|
|
struct i2c_adapter *adap = i2c->adapter;
|
|
struct i2c_msg msg;
|
|
int ret;
|
|
|
|
buf[0] = (unsigned char)reg;
|
|
memcpy(&buf[1], src, bytes);
|
|
msg.addr = i2c->addr;
|
|
msg.flags = 0;
|
|
msg.len = bytes + 1;
|
|
msg.buf = buf;
|
|
|
|
ret = adap->algo->master_xfer(adap, &msg, 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
return 0;
|
|
}
|
|
|
|
int pm860x_page_reg_read(struct i2c_client *i2c, int reg)
|
|
{
|
|
unsigned char zero = 0;
|
|
unsigned char data;
|
|
int ret;
|
|
|
|
i2c_lock_adapter(i2c->adapter);
|
|
read_device(i2c, 0xFA, 0, &zero);
|
|
read_device(i2c, 0xFB, 0, &zero);
|
|
read_device(i2c, 0xFF, 0, &zero);
|
|
ret = read_device(i2c, reg, 1, &data);
|
|
if (ret >= 0)
|
|
ret = (int)data;
|
|
read_device(i2c, 0xFE, 0, &zero);
|
|
read_device(i2c, 0xFC, 0, &zero);
|
|
i2c_unlock_adapter(i2c->adapter);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(pm860x_page_reg_read);
|
|
|
|
int pm860x_page_reg_write(struct i2c_client *i2c, int reg,
|
|
unsigned char data)
|
|
{
|
|
unsigned char zero;
|
|
int ret;
|
|
|
|
i2c_lock_adapter(i2c->adapter);
|
|
read_device(i2c, 0xFA, 0, &zero);
|
|
read_device(i2c, 0xFB, 0, &zero);
|
|
read_device(i2c, 0xFF, 0, &zero);
|
|
ret = write_device(i2c, reg, 1, &data);
|
|
read_device(i2c, 0xFE, 0, &zero);
|
|
read_device(i2c, 0xFC, 0, &zero);
|
|
i2c_unlock_adapter(i2c->adapter);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(pm860x_page_reg_write);
|
|
|
|
int pm860x_page_bulk_read(struct i2c_client *i2c, int reg,
|
|
int count, unsigned char *buf)
|
|
{
|
|
unsigned char zero = 0;
|
|
int ret;
|
|
|
|
i2c_lock_adapter(i2c->adapter);
|
|
read_device(i2c, 0xfa, 0, &zero);
|
|
read_device(i2c, 0xfb, 0, &zero);
|
|
read_device(i2c, 0xff, 0, &zero);
|
|
ret = read_device(i2c, reg, count, buf);
|
|
read_device(i2c, 0xFE, 0, &zero);
|
|
read_device(i2c, 0xFC, 0, &zero);
|
|
i2c_unlock_adapter(i2c->adapter);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(pm860x_page_bulk_read);
|
|
|
|
int pm860x_page_bulk_write(struct i2c_client *i2c, int reg,
|
|
int count, unsigned char *buf)
|
|
{
|
|
unsigned char zero = 0;
|
|
int ret;
|
|
|
|
i2c_lock_adapter(i2c->adapter);
|
|
read_device(i2c, 0xFA, 0, &zero);
|
|
read_device(i2c, 0xFB, 0, &zero);
|
|
read_device(i2c, 0xFF, 0, &zero);
|
|
ret = write_device(i2c, reg, count, buf);
|
|
read_device(i2c, 0xFE, 0, &zero);
|
|
read_device(i2c, 0xFC, 0, &zero);
|
|
i2c_unlock_adapter(i2c->adapter);
|
|
i2c_unlock_adapter(i2c->adapter);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(pm860x_page_bulk_write);
|
|
|
|
int pm860x_page_set_bits(struct i2c_client *i2c, int reg,
|
|
unsigned char mask, unsigned char data)
|
|
{
|
|
unsigned char zero;
|
|
unsigned char value;
|
|
int ret;
|
|
|
|
i2c_lock_adapter(i2c->adapter);
|
|
read_device(i2c, 0xFA, 0, &zero);
|
|
read_device(i2c, 0xFB, 0, &zero);
|
|
read_device(i2c, 0xFF, 0, &zero);
|
|
ret = read_device(i2c, reg, 1, &value);
|
|
if (ret < 0)
|
|
goto out;
|
|
value &= ~mask;
|
|
value |= data;
|
|
ret = write_device(i2c, reg, 1, &value);
|
|
out:
|
|
read_device(i2c, 0xFE, 0, &zero);
|
|
read_device(i2c, 0xFC, 0, &zero);
|
|
i2c_unlock_adapter(i2c->adapter);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(pm860x_page_set_bits);
|
|
|
|
static const struct i2c_device_id pm860x_id_table[] = {
|
|
{ "88PM860x", 0 },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, pm860x_id_table);
|
|
|
|
static int verify_addr(struct i2c_client *i2c)
|
|
{
|
|
unsigned short addr_8607[] = {0x30, 0x34};
|
|
unsigned short addr_8606[] = {0x10, 0x11};
|
|
int size, i;
|
|
|
|
if (i2c == NULL)
|
|
return 0;
|
|
size = ARRAY_SIZE(addr_8606);
|
|
for (i = 0; i < size; i++) {
|
|
if (i2c->addr == *(addr_8606 + i))
|
|
return CHIP_PM8606;
|
|
}
|
|
size = ARRAY_SIZE(addr_8607);
|
|
for (i = 0; i < size; i++) {
|
|
if (i2c->addr == *(addr_8607 + i))
|
|
return CHIP_PM8607;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct regmap_config pm860x_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
};
|
|
|
|
static int __devinit pm860x_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct pm860x_platform_data *pdata = client->dev.platform_data;
|
|
struct pm860x_chip *chip;
|
|
int ret;
|
|
|
|
if (!pdata) {
|
|
pr_info("No platform data in %s!\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
chip = kzalloc(sizeof(struct pm860x_chip), GFP_KERNEL);
|
|
if (chip == NULL)
|
|
return -ENOMEM;
|
|
|
|
chip->id = verify_addr(client);
|
|
chip->regmap = regmap_init_i2c(client, &pm860x_regmap_config);
|
|
if (IS_ERR(chip->regmap)) {
|
|
ret = PTR_ERR(chip->regmap);
|
|
dev_err(&client->dev, "Failed to allocate register map: %d\n",
|
|
ret);
|
|
kfree(chip);
|
|
return ret;
|
|
}
|
|
chip->client = client;
|
|
i2c_set_clientdata(client, chip);
|
|
chip->dev = &client->dev;
|
|
dev_set_drvdata(chip->dev, chip);
|
|
|
|
/*
|
|
* Both client and companion client shares same platform driver.
|
|
* Driver distinguishes them by pdata->companion_addr.
|
|
* pdata->companion_addr is only assigned if companion chip exists.
|
|
* At the same time, the companion_addr shouldn't equal to client
|
|
* address.
|
|
*/
|
|
if (pdata->companion_addr && (pdata->companion_addr != client->addr)) {
|
|
chip->companion_addr = pdata->companion_addr;
|
|
chip->companion = i2c_new_dummy(chip->client->adapter,
|
|
chip->companion_addr);
|
|
chip->regmap_companion = regmap_init_i2c(chip->companion,
|
|
&pm860x_regmap_config);
|
|
if (IS_ERR(chip->regmap_companion)) {
|
|
ret = PTR_ERR(chip->regmap_companion);
|
|
dev_err(&chip->companion->dev,
|
|
"Failed to allocate register map: %d\n", ret);
|
|
return ret;
|
|
}
|
|
i2c_set_clientdata(chip->companion, chip);
|
|
}
|
|
|
|
pm860x_device_init(chip, pdata);
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit pm860x_remove(struct i2c_client *client)
|
|
{
|
|
struct pm860x_chip *chip = i2c_get_clientdata(client);
|
|
|
|
pm860x_device_exit(chip);
|
|
if (chip->companion) {
|
|
regmap_exit(chip->regmap_companion);
|
|
i2c_unregister_device(chip->companion);
|
|
}
|
|
regmap_exit(chip->regmap);
|
|
kfree(chip);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int pm860x_suspend(struct device *dev)
|
|
{
|
|
struct i2c_client *client = container_of(dev, struct i2c_client, dev);
|
|
struct pm860x_chip *chip = i2c_get_clientdata(client);
|
|
|
|
if (device_may_wakeup(dev) && chip->wakeup_flag)
|
|
enable_irq_wake(chip->core_irq);
|
|
return 0;
|
|
}
|
|
|
|
static int pm860x_resume(struct device *dev)
|
|
{
|
|
struct i2c_client *client = container_of(dev, struct i2c_client, dev);
|
|
struct pm860x_chip *chip = i2c_get_clientdata(client);
|
|
|
|
if (device_may_wakeup(dev) && chip->wakeup_flag)
|
|
disable_irq_wake(chip->core_irq);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(pm860x_pm_ops, pm860x_suspend, pm860x_resume);
|
|
|
|
static struct i2c_driver pm860x_driver = {
|
|
.driver = {
|
|
.name = "88PM860x",
|
|
.owner = THIS_MODULE,
|
|
.pm = &pm860x_pm_ops,
|
|
},
|
|
.probe = pm860x_probe,
|
|
.remove = __devexit_p(pm860x_remove),
|
|
.id_table = pm860x_id_table,
|
|
};
|
|
|
|
static int __init pm860x_i2c_init(void)
|
|
{
|
|
int ret;
|
|
ret = i2c_add_driver(&pm860x_driver);
|
|
if (ret != 0)
|
|
pr_err("Failed to register 88PM860x I2C driver: %d\n", ret);
|
|
return ret;
|
|
}
|
|
subsys_initcall(pm860x_i2c_init);
|
|
|
|
static void __exit pm860x_i2c_exit(void)
|
|
{
|
|
i2c_del_driver(&pm860x_driver);
|
|
}
|
|
module_exit(pm860x_i2c_exit);
|
|
|
|
MODULE_DESCRIPTION("I2C Driver for Marvell 88PM860x");
|
|
MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
|
|
MODULE_LICENSE("GPL");
|