From 77ee09c67e051a5ebd19a53ba3945dbdc8d21b3c Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Fri, 31 Jul 2009 18:26:51 +0100 Subject: [PATCH] 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 --- include/sound/soc.h | 1 + sound/soc/soc-core.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/include/sound/soc.h b/include/sound/soc.h index 756fb59772d..55b33093726 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -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; diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 5eabb711760..fb8d7a76615 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -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; -- 2.20.1