Commit d17bf318 authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Mark Brown
Browse files

ASoC: twl6040: Introduce SW only shadow register 



Software only shadow register to be used by the driver.
For example Earpiece path will need this shadow register.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: default avatarLiam Girdwood <lrg@ti.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 5bf692d9

include/linux/mfd/twl6040.h

+0 −2
Original line number Diff line number Diff line
@@ -68,8 +68,6 @@ 
#define TWL6040_REG_ACCCTL		0x2D

#define TWL6040_REG_STATUS		0x2E



#define TWL6040_CACHEREGNUM		(TWL6040_REG_STATUS + 1)



/* INTID (0x03) fields */



#define TWL6040_THINT			0x01

sound/soc/codecs/twl6040.c

+16 −3
Original line number Diff line number Diff line
@@ -57,6 +57,10 @@ 
#define TWL6040_HF_VOL_MASK	0x1F

#define TWL6040_HF_VOL_SHIFT	0



/* Shadow register used by the driver */

#define TWL6040_REG_SW_SHADOW	0x2F

#define TWL6040_CACHEREGNUM	(TWL6040_REG_SW_SHADOW + 1)



struct twl6040_output {

	u16 active;

	u16 left_vol;
@@ -153,6 +157,8 @@ static const u8 twl6040_reg[TWL6040_CACHEREGNUM] = { 
	0x00, /* REG_HFOTRIM	0x2C	*/

	0x09, /* REG_ACCCTL	0x2D	*/

	0x00, /* REG_STATUS	0x2E (ro) */



	0x00, /* REG_SW_SHADOW	0x2F - Shadow, non HW register */

};



/* List of registers to be restored after power up */
@@ -236,8 +242,12 @@ static int twl6040_read_reg_volatile(struct snd_soc_codec *codec, 
	if (reg >= TWL6040_CACHEREGNUM)

		return -EIO;



	if (likely(reg < TWL6040_REG_SW_SHADOW)) {

		value = twl6040_reg_read(twl6040, reg);

		twl6040_write_reg_cache(codec, reg, value);

	} else {

		value = twl6040_read_reg_cache(codec, reg);

	}



	return value;

}
@@ -254,7 +264,10 @@ static int twl6040_write(struct snd_soc_codec *codec, 
		return -EIO;



	twl6040_write_reg_cache(codec, reg, value);

	if (likely(reg < TWL6040_REG_SW_SHADOW))

		return twl6040_reg_write(twl6040, reg, value);

	else

		return 0;

}



static void twl6040_init_chip(struct snd_soc_codec *codec)

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