diff options
Diffstat (limited to 'sound/soc/soc-cache.c')
| -rw-r--r-- | sound/soc/soc-cache.c | 39 |
1 files changed, 36 insertions, 3 deletions
diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c index ab058b811633..56ec3f22bf1c 100644 --- a/sound/soc/soc-cache.c +++ b/sound/soc/soc-cache.c @@ -12,6 +12,7 @@ */ #include <linux/i2c.h> +#include <linux/spi/spi.h> #include <sound/soc.h> static unsigned int snd_soc_7_9_read(struct snd_soc_codec *codec, @@ -46,6 +47,36 @@ static int snd_soc_7_9_write(struct snd_soc_codec *codec, unsigned int reg, return -EIO; } +#if defined(CONFIG_SPI_MASTER) +static int snd_soc_7_9_spi_write(void *control_data, const char *data, + int len) +{ + struct spi_device *spi = control_data; + struct spi_transfer t; + struct spi_message m; + u8 msg[2]; + + if (len <= 0) + return 0; + + msg[0] = data[0]; + msg[1] = data[1]; + + spi_message_init(&m); + memset(&t, 0, (sizeof t)); + + t.tx_buf = &msg[0]; + t.len = len; + + spi_message_add_tail(&t, &m); + spi_sync(spi, &m); + + return len; +} +#else +#define snd_soc_7_9_spi_write NULL +#endif + static int snd_soc_8_16_write(struct snd_soc_codec *codec, unsigned int reg, unsigned int value) { @@ -115,12 +146,12 @@ static struct { int addr_bits; int data_bits; int (*write)(struct snd_soc_codec *codec, unsigned int, unsigned int); + int (*spi_write)(void *, const char *, int); unsigned int (*read)(struct snd_soc_codec *, unsigned int); unsigned int (*i2c_read)(struct snd_soc_codec *, unsigned int); } io_types[] = { - { 7, 9, snd_soc_7_9_write, snd_soc_7_9_read }, - { 8, 16, - snd_soc_8_16_write, snd_soc_8_16_read, + { 7, 9, snd_soc_7_9_write, snd_soc_7_9_spi_write, snd_soc_7_9_read }, + { 8, 16, snd_soc_8_16_write, NULL, snd_soc_8_16_read, snd_soc_8_16_read_i2c }, }; @@ -177,6 +208,8 @@ int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec, break; case SND_SOC_SPI: + if (io_types[i].spi_write) + codec->hw_write = io_types[i].spi_write; break; } |