ASoC: ad1836: use soc-cache framework for codec registers access
Signed-off-by: Barry Song <Barry.Song@analog.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index 02c2357..cde7b63 100644
--- a/sound/soc/soc-cache.c
+++ b/sound/soc/soc-cache.c
@@ -15,6 +15,68 @@
#include <linux/spi/spi.h>
#include <sound/soc.h>
+static unsigned int snd_soc_4_12_read(struct snd_soc_codec *codec,
+ unsigned int reg)
+{
+ u16 *cache = codec->reg_cache;
+ if (reg >= codec->reg_cache_size)
+ return -1;
+ return cache[reg];
+}
+
+static int snd_soc_4_12_write(struct snd_soc_codec *codec, unsigned int reg,
+ unsigned int value)
+{
+ u16 *cache = codec->reg_cache;
+ u8 data[2];
+ int ret;
+
+ BUG_ON(codec->volatile_register);
+
+ data[0] = (reg << 4) | ((value >> 8) & 0x000f);
+ data[1] = value & 0x00ff;
+
+ if (reg < codec->reg_cache_size)
+ cache[reg] = value;
+ ret = codec->hw_write(codec->control_data, data, 2);
+ if (ret == 2)
+ return 0;
+ if (ret < 0)
+ return ret;
+ else
+ return -EIO;
+}
+
+#if defined(CONFIG_SPI_MASTER)
+static int snd_soc_4_12_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[1];
+ msg[1] = data[0];
+
+ 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_4_12_spi_write NULL
+#endif
+
static unsigned int snd_soc_7_9_read(struct snd_soc_codec *codec,
unsigned int reg)
{
@@ -180,6 +242,11 @@
unsigned int (*i2c_read)(struct snd_soc_codec *, unsigned int);
} io_types[] = {
{
+ .addr_bits = 4, .data_bits = 12,
+ .write = snd_soc_4_12_write, .read = snd_soc_4_12_read,
+ .spi_write = snd_soc_4_12_spi_write,
+ },
+ {
.addr_bits = 7, .data_bits = 9,
.write = snd_soc_7_9_write, .read = snd_soc_7_9_read,
.spi_write = snd_soc_7_9_spi_write,