Commit 77ee09c6 authored by Mark Brown's avatar Mark Brown
Browse files

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: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent a1daf67d

include/sound/soc.h

+1 −0
Original line number Diff line number Diff line
@@ -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;

sound/soc/soc-core.c

+3 −0
Original line number Diff line number Diff line
@@ -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;