From 2ff6d5a108c6b7c07d1093c38e0def015edd325d Mon Sep 17 00:00:00 2001 From: Shengjiu Wang Date: Sun, 23 Aug 2020 21:54:37 +0800 Subject: [PATCH] ASoC: ak5558: Add regulator support "AVDD" is for analog power supply, "DVDD" is for digital power supply, they can improve the power management. As the regulator is enabled in pm runtime resume, which is behind the component driver probe, so accessing registers in component driver probe will fail. Fix this issue by enabling regcache_cache_only after pm_runtime_enable. Signed-off-by: Shengjiu Wang Link: https://lore.kernel.org/r/1598190877-9213-2-git-send-email-shengjiu.wang@nxp.com Signed-off-by: Mark Brown --- sound/soc/codecs/ak5558.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/sound/soc/codecs/ak5558.c b/sound/soc/codecs/ak5558.c index 8179512129d3..2f076d5ee284 100644 --- a/sound/soc/codecs/ak5558.c +++ b/sound/soc/codecs/ak5558.c @@ -11,6 +11,7 @@ #include #include #include +#include #include #include @@ -22,8 +23,15 @@ #include "ak5558.h" +#define AK5558_NUM_SUPPLIES 2 +static const char *ak5558_supply_names[AK5558_NUM_SUPPLIES] = { + "DVDD", + "AVDD", +}; + /* AK5558 Codec Private Data */ struct ak5558_priv { + struct regulator_bulk_data supplies[AK5558_NUM_SUPPLIES]; struct snd_soc_component component; struct regmap *regmap; struct i2c_client *i2c; @@ -299,12 +307,22 @@ static int __maybe_unused ak5558_runtime_suspend(struct device *dev) regcache_cache_only(ak5558->regmap, true); ak5558_power_off(ak5558); + regulator_bulk_disable(ARRAY_SIZE(ak5558->supplies), + ak5558->supplies); return 0; } static int __maybe_unused ak5558_runtime_resume(struct device *dev) { struct ak5558_priv *ak5558 = dev_get_drvdata(dev); + int ret; + + ret = regulator_bulk_enable(ARRAY_SIZE(ak5558->supplies), + ak5558->supplies); + if (ret != 0) { + dev_err(dev, "Failed to enable supplies: %d\n", ret); + return ret; + } ak5558_power_off(ak5558); ak5558_power_on(ak5558); @@ -350,6 +368,7 @@ static int ak5558_i2c_probe(struct i2c_client *i2c) { struct ak5558_priv *ak5558; int ret = 0; + int i; ak5558 = devm_kzalloc(&i2c->dev, sizeof(*ak5558), GFP_KERNEL); if (!ak5558) @@ -367,6 +386,16 @@ static int ak5558_i2c_probe(struct i2c_client *i2c) if (IS_ERR(ak5558->reset_gpiod)) return PTR_ERR(ak5558->reset_gpiod); + for (i = 0; i < ARRAY_SIZE(ak5558->supplies); i++) + ak5558->supplies[i].supply = ak5558_supply_names[i]; + + ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(ak5558->supplies), + ak5558->supplies); + if (ret != 0) { + dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret); + return ret; + } + ret = devm_snd_soc_register_component(&i2c->dev, &soc_codec_dev_ak5558, &ak5558_dai, 1); @@ -374,6 +403,7 @@ static int ak5558_i2c_probe(struct i2c_client *i2c) return ret; pm_runtime_enable(&i2c->dev); + regcache_cache_only(ak5558->regmap, true); return 0; } -- 2.20.1