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mfd: Append additional read write on 88pm860x 

Append the additional read/write operation on 88pm860x for accessing
test page in 88PM860x.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Haojian Zhuang 2011-03-07 23:43:16 +08:00 committed by Samuel Ortiz
parent c9f560b3d0
commit 09b034191a
2 changed files with 111 additions and 0 deletions
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103
drivers/mfd/88pm860x-i2c.c
View File

@ -126,6 +126,109 @@ out:
}
EXPORT_SYMBOL(pm860x_set_bits);
int pm860x_page_reg_read(struct i2c_client *i2c, int reg)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
unsigned char zero = 0;
unsigned char data;
int ret;
mutex_lock(&chip->io_lock);
pm860x_write_device(i2c, 0xFA, 0, &zero);
pm860x_write_device(i2c, 0xFB, 0, &zero);
pm860x_write_device(i2c, 0xFF, 0, &zero);
ret = pm860x_read_device(i2c, reg, 1, &data);
if (ret >= 0)
ret = (int)data;
pm860x_write_device(i2c, 0xFE, 0, &zero);
pm860x_write_device(i2c, 0xFC, 0, &zero);
mutex_unlock(&chip->io_lock);
return ret;
}
EXPORT_SYMBOL(pm860x_page_reg_read);
int pm860x_page_reg_write(struct i2c_client *i2c, int reg,
unsigned char data)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
unsigned char zero;
int ret;
mutex_lock(&chip->io_lock);
pm860x_write_device(i2c, 0xFA, 0, &zero);
pm860x_write_device(i2c, 0xFB, 0, &zero);
pm860x_write_device(i2c, 0xFF, 0, &zero);
ret = pm860x_write_device(i2c, reg, 1, &data);
pm860x_write_device(i2c, 0xFE, 0, &zero);
pm860x_write_device(i2c, 0xFC, 0, &zero);
mutex_unlock(&chip->io_lock);
return ret;
}
EXPORT_SYMBOL(pm860x_page_reg_write);
int pm860x_page_bulk_read(struct i2c_client *i2c, int reg,
int count, unsigned char *buf)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
unsigned char zero = 0;
int ret;
mutex_lock(&chip->io_lock);
pm860x_write_device(i2c, 0xFA, 0, &zero);
pm860x_write_device(i2c, 0xFB, 0, &zero);
pm860x_write_device(i2c, 0xFF, 0, &zero);
ret = pm860x_read_device(i2c, reg, count, buf);
pm860x_write_device(i2c, 0xFE, 0, &zero);
pm860x_write_device(i2c, 0xFC, 0, &zero);
mutex_unlock(&chip->io_lock);
return ret;
}
EXPORT_SYMBOL(pm860x_page_bulk_read);
int pm860x_page_bulk_write(struct i2c_client *i2c, int reg,
int count, unsigned char *buf)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
unsigned char zero = 0;
int ret;
mutex_lock(&chip->io_lock);
pm860x_write_device(i2c, 0xFA, 0, &zero);
pm860x_write_device(i2c, 0xFB, 0, &zero);
pm860x_write_device(i2c, 0xFF, 0, &zero);
ret = pm860x_write_device(i2c, reg, count, buf);
pm860x_write_device(i2c, 0xFE, 0, &zero);
pm860x_write_device(i2c, 0xFC, 0, &zero);
mutex_unlock(&chip->io_lock);
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)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
unsigned char zero;
unsigned char value;
int ret;
mutex_lock(&chip->io_lock);
pm860x_write_device(i2c, 0xFA, 0, &zero);
pm860x_write_device(i2c, 0xFB, 0, &zero);
pm860x_write_device(i2c, 0xFF, 0, &zero);
ret = pm860x_read_device(i2c, reg, 1, &value);
if (ret < 0)
goto out;
value &= ~mask;
value |= data;
ret = pm860x_write_device(i2c, reg, 1, &value);
out:
pm860x_write_device(i2c, 0xFE, 0, &zero);
pm860x_write_device(i2c, 0xFC, 0, &zero);
mutex_unlock(&chip->io_lock);
return ret;
}
EXPORT_SYMBOL(pm860x_page_set_bits);
static const struct i2c_device_id pm860x_id_table[] = {
{ "88PM860x", 0 },

8
include/linux/mfd/88pm860x.h
View File

@ -368,6 +368,14 @@ extern int pm860x_bulk_read(struct i2c_client *, int, int, unsigned char *);
extern int pm860x_bulk_write(struct i2c_client *, int, int, unsigned char *);
extern int pm860x_set_bits(struct i2c_client *, int, unsigned char,
unsigned char);
extern int pm860x_page_reg_read(struct i2c_client *, int);
extern int pm860x_page_reg_write(struct i2c_client *, int, unsigned char);
extern int pm860x_page_bulk_read(struct i2c_client *, int, int,
unsigned char *);
extern int pm860x_page_bulk_write(struct i2c_client *, int, int,
unsigned char *);
extern int pm860x_page_set_bits(struct i2c_client *, int, unsigned char,
unsigned char);
extern int pm860x_device_init(struct pm860x_chip *chip,
struct pm860x_platform_data *pdata) __devinit ;