diff options
Diffstat (limited to 'sound/soc/soc-io.c')
| -rw-r--r-- | sound/soc/soc-io.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/sound/soc/soc-io.c b/sound/soc/soc-io.c index 4f11d23..122c0c1 100644 --- a/sound/soc/soc-io.c +++ b/sound/soc/soc-io.c @@ -65,6 +65,31 @@ static unsigned int hw_read(struct snd_soc_codec *codec, unsigned int reg) return val; } +/* Primitive bulk write support for soc-cache. The data pointed to by + * `data' needs to already be in the form the hardware expects. Any + * data written through this function will not go through the cache as + * it only handles writing to volatile or out of bounds registers. + * + * This is currently only supported for devices using the regmap API + * wrappers. + */ +static int snd_soc_hw_bulk_write_raw(struct snd_soc_codec *codec, + unsigned int reg, + const void *data, size_t len) +{ + /* To ensure that we don't get out of sync with the cache, check + * whether the base register is volatile or if we've directly asked + * to bypass the cache. Out of bounds registers are considered + * volatile. + */ + if (!codec->cache_bypass + && !snd_soc_codec_volatile_register(codec, reg) + && reg < codec->driver->reg_cache_size) + return -EINVAL; + + return regmap_raw_write(codec->control_data, reg, data, len); +} + /** * snd_soc_codec_set_cache_io: Set up standard I/O functions. * @@ -94,6 +119,7 @@ int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec, memset(&config, 0, sizeof(config)); codec->write = hw_write; codec->read = hw_read; + codec->bulk_write_raw = snd_soc_hw_bulk_write_raw; config.reg_bits = addr_bits; config.val_bits = data_bits; |