/*
- * I2C driver for Marvell 88PM8607
+ * I2C driver for Marvell 88PM860x
*
* Copyright (C) 2009 Marvell International Ltd.
* Haojian Zhuang <haojian.zhuang@marvell.com>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
-#include <linux/mfd/88pm8607.h>
+#include <linux/mfd/88pm860x.h>
+#include <linux/slab.h>
-static inline int pm8607_read_device(struct pm8607_chip *chip,
+static inline int pm860x_read_device(struct i2c_client *i2c,
int reg, int bytes, void *dest)
{
- struct i2c_client *i2c = chip->client;
unsigned char data;
int ret;
return 0;
}
-static inline int pm8607_write_device(struct pm8607_chip *chip,
+static inline int pm860x_write_device(struct i2c_client *i2c,
int reg, int bytes, void *src)
{
- struct i2c_client *i2c = chip->client;
unsigned char buf[bytes + 1];
int ret;
return 0;
}
-int pm8607_reg_read(struct pm8607_chip *chip, int reg)
+int pm860x_reg_read(struct i2c_client *i2c, int reg)
{
+ struct pm860x_chip *chip = i2c_get_clientdata(i2c);
unsigned char data;
int ret;
mutex_lock(&chip->io_lock);
- ret = chip->read(chip, reg, 1, &data);
+ ret = pm860x_read_device(i2c, reg, 1, &data);
mutex_unlock(&chip->io_lock);
if (ret < 0)
else
return (int)data;
}
-EXPORT_SYMBOL(pm8607_reg_read);
+EXPORT_SYMBOL(pm860x_reg_read);
-int pm8607_reg_write(struct pm8607_chip *chip, int reg,
+int pm860x_reg_write(struct i2c_client *i2c, int reg,
unsigned char data)
{
+ struct pm860x_chip *chip = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&chip->io_lock);
- ret = chip->write(chip, reg, 1, &data);
+ ret = pm860x_write_device(i2c, reg, 1, &data);
mutex_unlock(&chip->io_lock);
return ret;
}
-EXPORT_SYMBOL(pm8607_reg_write);
+EXPORT_SYMBOL(pm860x_reg_write);
-int pm8607_bulk_read(struct pm8607_chip *chip, int reg,
+int pm860x_bulk_read(struct i2c_client *i2c, int reg,
int count, unsigned char *buf)
{
+ struct pm860x_chip *chip = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&chip->io_lock);
- ret = chip->read(chip, reg, count, buf);
+ ret = pm860x_read_device(i2c, reg, count, buf);
mutex_unlock(&chip->io_lock);
return ret;
}
-EXPORT_SYMBOL(pm8607_bulk_read);
+EXPORT_SYMBOL(pm860x_bulk_read);
-int pm8607_bulk_write(struct pm8607_chip *chip, int reg,
+int pm860x_bulk_write(struct i2c_client *i2c, int reg,
int count, unsigned char *buf)
{
+ struct pm860x_chip *chip = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&chip->io_lock);
- ret = chip->write(chip, reg, count, buf);
+ ret = pm860x_write_device(i2c, reg, count, buf);
mutex_unlock(&chip->io_lock);
return ret;
}
-EXPORT_SYMBOL(pm8607_bulk_write);
+EXPORT_SYMBOL(pm860x_bulk_write);
-int pm8607_set_bits(struct pm8607_chip *chip, int reg,
+int pm860x_set_bits(struct i2c_client *i2c, int reg,
unsigned char mask, unsigned char data)
{
+ struct pm860x_chip *chip = i2c_get_clientdata(i2c);
unsigned char value;
int ret;
mutex_lock(&chip->io_lock);
- ret = chip->read(chip, reg, 1, &value);
+ ret = pm860x_read_device(i2c, reg, 1, &value);
if (ret < 0)
goto out;
value &= ~mask;
value |= data;
- ret = chip->write(chip, reg, 1, &value);
+ ret = pm860x_write_device(i2c, reg, 1, &value);
out:
mutex_unlock(&chip->io_lock);
return ret;
}
-EXPORT_SYMBOL(pm8607_set_bits);
+EXPORT_SYMBOL(pm860x_set_bits);
static const struct i2c_device_id pm860x_id_table[] = {
- { "88PM8607", 0 },
+ { "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 int __devinit pm860x_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 ret;
+ struct pm860x_platform_data *pdata = client->dev.platform_data;
+ struct pm860x_chip *chip;
- chip = kzalloc(sizeof(struct pm8607_chip), GFP_KERNEL);
+ 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->client = client;
- chip->dev = &client->dev;
- chip->read = pm8607_read_device;
- chip->write = pm8607_write_device;
- memcpy(&chip->id, id, sizeof(struct i2c_device_id));
i2c_set_clientdata(client, chip);
-
+ chip->dev = &client->dev;
mutex_init(&chip->io_lock);
dev_set_drvdata(chip->dev, chip);
- ret = pm860x_device_init(chip, pdata);
- if (ret < 0)
- goto out;
-
-
+ /*
+ * 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);
+ i2c_set_clientdata(chip->companion, chip);
+ }
+
+ pm860x_device_init(chip, pdata);
return 0;
-
-out:
- i2c_set_clientdata(client, NULL);
- kfree(chip);
- return ret;
}
static int __devexit pm860x_remove(struct i2c_client *client)
{
- struct pm8607_chip *chip = i2c_get_clientdata(client);
+ struct pm860x_chip *chip = i2c_get_clientdata(client);
+ pm860x_device_exit(chip);
+ i2c_unregister_device(chip->companion);
+ i2c_set_clientdata(chip->companion, NULL);
+ i2c_set_clientdata(chip->client, NULL);
kfree(chip);
return 0;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff