From c05b84d14b230a96e3f782c9d87ab18d82df8bd2 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Fri, 7 Sep 2012 12:57:11 +0800 Subject: ASoC: dapm: Allow regulators to bypass as well as disable when idle Allow regulators managed via DAPM to make use of the bypass support that has recently been added to the regulator API by setting a flag SND_SOC_DAPM_REGULATOR_BYPASS. When this flag is set the regulator will be put into bypass mode before being disabled, allowing the regulator to fall into bypass mode if it can't be disabled due to other users. Signed-off-by: Mark Brown --- include/sound/soc-dapm.h | 3 +++ sound/soc/soc-dapm.c | 23 +++++++++++++++++++++-- 2 files changed, 24 insertions(+), 2 deletions(-) diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h index c96bf5ae80a6..e1ef63d4a5c4 100644 --- a/include/sound/soc-dapm.h +++ b/include/sound/soc-dapm.h @@ -320,6 +320,9 @@ struct device; #define SND_SOC_DAPM_EVENT_OFF(e) \ (e & (SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD)) +/* regulator widget flags */ +#define SND_SOC_DAPM_REGULATOR_BYPASS 0x1 /* bypass when disabled */ + struct snd_soc_dapm_widget; enum snd_soc_dapm_type; struct snd_soc_dapm_path; diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 873e6e76ee87..d0a4be38dc0f 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -1017,10 +1017,29 @@ EXPORT_SYMBOL_GPL(dapm_reg_event); int dapm_regulator_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, int event) { - if (SND_SOC_DAPM_EVENT_ON(event)) + int ret; + + if (SND_SOC_DAPM_EVENT_ON(event)) { + if (w->invert & SND_SOC_DAPM_REGULATOR_BYPASS) { + ret = regulator_allow_bypass(w->regulator, true); + if (ret != 0) + dev_warn(w->dapm->dev, + "Failed to bypass %s: %d\n", + w->name, ret); + } + return regulator_enable(w->regulator); - else + } else { + if (w->invert & SND_SOC_DAPM_REGULATOR_BYPASS) { + ret = regulator_allow_bypass(w->regulator, false); + if (ret != 0) + dev_warn(w->dapm->dev, + "Failed to unbypass %s: %d\n", + w->name, ret); + } + return regulator_disable_deferred(w->regulator, w->shift); + } } EXPORT_SYMBOL_GPL(dapm_regulator_event); -- cgit v1.2.3