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Commit 09b03419 authored by Haojian Zhuang's avatar Haojian Zhuang Committed by Samuel Ortiz
Browse files

mfd: Append additional read write on 88pm860x 



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

Signed-off-by: default avatarHaojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent c9f560b3

drivers/mfd/88pm860x-i2c.c

+103 −0
Original line number Diff line number Diff line
@@ -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 },

include/linux/mfd/88pm860x.h

+8 −0
Original line number Diff line number Diff line
@@ -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 ;