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Commit 341c9b84 authored by Joonyoung Shim's avatar Joonyoung Shim Committed by Mark Brown
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ASoC: Factor out I2C 8 bit address 8 bit data I/O 



This patch is for the AK4671 codec driver using this format.

Signed-off-by: default avatarJoonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 85488037

sound/soc/soc-cache.c

+30 −0
Original line number Diff line number Diff line
@@ -77,6 +77,35 @@ static int snd_soc_7_9_spi_write(void *control_data, const char *data, 
#define snd_soc_7_9_spi_write NULL

#endif



static int snd_soc_8_8_write(struct snd_soc_codec *codec, unsigned int reg,

			     unsigned int value)

{

	u8 *cache = codec->reg_cache;

	u8 data[2];



	BUG_ON(codec->volatile_register);



	data[0] = reg & 0xff;

	data[1] = value & 0xff;



	if (reg < codec->reg_cache_size)

		cache[reg] = value;



	if (codec->hw_write(codec->control_data, data, 2) == 2)

		return 0;

	else

		return -EIO;

}



static unsigned int snd_soc_8_8_read(struct snd_soc_codec *codec,

				     unsigned int reg)

{

	u8 *cache = codec->reg_cache;

	if (reg >= codec->reg_cache_size)

		return -1;

	return cache[reg];

}



static int snd_soc_8_16_write(struct snd_soc_codec *codec, unsigned int reg,

			      unsigned int value)

{
@@ -151,6 +180,7 @@ static struct { 
	unsigned int (*i2c_read)(struct snd_soc_codec *, unsigned int);

} io_types[] = {

	{ 7, 9, snd_soc_7_9_write, snd_soc_7_9_spi_write, snd_soc_7_9_read },

	{ 8, 8, snd_soc_8_8_write, NULL, snd_soc_8_8_read, NULL },

	{ 8, 16, snd_soc_8_16_write, NULL, snd_soc_8_16_read,

	  snd_soc_8_16_read_i2c },

};