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mfd: Add WM8994 bulk register write operation 

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Mark Brown 2011-03-10 13:54:07 +00:00 committed by Samuel Ortiz
parent 09b034191a
commit e93c53870c
2 changed files with 25 additions and 0 deletions
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23
drivers/mfd/wm8994-core.c
View File

@ -137,6 +137,29 @@ int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg,
}
EXPORT_SYMBOL_GPL(wm8994_reg_write);
/**
* wm8994_bulk_write: Write multiple WM8994 registers
*
* @wm8994: Device to write to
* @reg: First register
* @count: Number of registers
* @buf: Buffer to write from.
*/
int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg,
int count, u16 *buf)
{
int ret;
mutex_lock(&wm8994->io_lock);
ret = wm8994_write(wm8994, reg, count * 2, buf);
mutex_unlock(&wm8994->io_lock);
return ret;
}
EXPORT_SYMBOL_GPL(wm8994_bulk_write);
/**
* wm8994_set_bits: Set the value of a bitfield in a WM8994 register
*

2
include/linux/mfd/wm8994/core.h
View File

@ -88,6 +88,8 @@ int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg,
unsigned short mask, unsigned short val);
int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg,
int count, u16 *buf);
int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg,
int count, u16 *buf);
/* Helper to save on boilerplate */