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Commit e93c5387 authored by Mark Brown's avatar Mark Brown Committed by Samuel Ortiz
Browse files

mfd: Add WM8994 bulk register write operation 



Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 09b03419

drivers/mfd/wm8994-core.c

+23 −0
Original line number Diff line number Diff line
@@ -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

 *

include/linux/mfd/wm8994/core.h

+2 −0
Original line number Diff line number Diff line
@@ -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 */