ASoC: Factor out 7 bit register 9 bit data SPI write
This converts all the Wolfson drivers using this format (the only devices
that do) except WM8753 to use it.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index ab058b8..56ec3f2 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 @@
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 @@
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 @@
break;
case SND_SOC_SPI:
+ if (io_types[i].spi_write)
+ codec->hw_write = io_types[i].spi_write;
break;
}