[PATCH 1/2] ASoC: dt-bindings: ak5558: Add power supply property

[PATCH 1/2] ASoC: dt-bindings: ak5558: Add power supply property

[Shengjiu Wang]

AVDD-supply is for Analog power supply
DVDD-supply is for Digital power supply

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
 Documentation/devicetree/bindings/sound/ak5558.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/ak5558.txt b/Documentation/devicetree/bindings/sound/ak5558.txt
index 7d67ca6ced80..36934098170c 100644
--- a/Documentation/devicetree/bindings/sound/ak5558.txt
+++ b/Documentation/devicetree/bindings/sound/ak5558.txt
@@ -10,6 +10,8 @@ Required properties:
 Optional properties:
 
 - reset-gpios: A GPIO specifier for the power down & reset pin.
+- AVDD-supply: Analog power supply
+- DVDD-supply: Digital power supply
 
 Example:
 
-- 
2.27.0

[PATCH 2/2] ASoC: ak5558: Add regulator support

[Shengjiu Wang]

"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 <shengjiu.wang@nxp.com>
---
 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 <linux/module.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
 #include <linux/slab.h>
 
 #include <sound/initval.h>
@@ -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;
 }
-- 
2.27.0

Re: [PATCH 1/2] ASoC: dt-bindings: ak5558: Add power supply property

[Mark Brown]

On Sun, 23 Aug 2020 21:54:36 +0800, Shengjiu Wang wrote:
> AVDD-supply is for Analog power supply
> DVDD-supply is for Digital power supply

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/2] ASoC: dt-bindings: ak5558: Add power supply property
      commit: 5edc8c4fe019b920ae9bd1e3413d66f6e8adf29b
[2/2] ASoC: ak5558: Add regulator support
      commit: 2ff6d5a108c6b7c07d1093c38e0def015edd325d

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark