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ASoC: Allow CODECs to flag invalid registers 

This helps CODECs with sparse register maps work better with the
register cache display interface.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2009-07-31 18:26:51 +01:00
parent a1daf67d72
commit 77ee09c67e
2 changed files with 4 additions and 0 deletions
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1
include/sound/soc.h
View File

@ -385,6 +385,7 @@ struct snd_soc_codec {
int (*display_register)(struct snd_soc_codec *, char *,
size_t, unsigned int);
int (*volatile_register)(unsigned int);
int (*readable_register)(unsigned int);
hw_write_t hw_write;
hw_read_t hw_read;
void *reg_cache;

3
sound/soc/soc-core.c
View File

@ -1156,6 +1156,9 @@ static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
count += sprintf(buf, "%s registers\n", codec->name);
for (i = 0; i < codec->reg_cache_size; i += step) {
if (codec->readable_register && !codec->readable_register(i))
continue;
count += sprintf(buf + count, "%2x: ", i);
if (count >= PAGE_SIZE - 1)
break;