[PATCH] ASoC: tlv320adcx140: Fix bias config values

[PATCH] ASoC: tlv320adcx140: Fix bias config values

[Dan Murphy]

The device tree binding declares the ti,mic-bias-source and the
ti,vref-source properties as u32.  The code reads them as u8 which is
incorrect.  Since the device tree binding indicates them as u32 the
conde needs to be updated to read u32.

In addition the bias source needs to be shifted 4 bits to
correctly write the register.

Fixes: 37bde5acf040 ("ASoC: tlv320adcx140: Add the tlv320adcx140 codec
driver family")
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
 sound/soc/codecs/tlv320adcx140.c | 13 +++++++------
 sound/soc/codecs/tlv320adcx140.h |  1 +
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/sound/soc/codecs/tlv320adcx140.c b/sound/soc/codecs/tlv320adcx140.c
index 0f713efde046..1d7d7b34a46e 100644
--- a/sound/soc/codecs/tlv320adcx140.c
+++ b/sound/soc/codecs/tlv320adcx140.c
@@ -739,11 +739,12 @@ static int adcx140_codec_probe(struct snd_soc_component *component)
 {
 	struct adcx140_priv *adcx140 = snd_soc_component_get_drvdata(component);
 	int sleep_cfg_val = ADCX140_WAKE_DEV;
-	u8 bias_source;
-	u8 vref_source;
+	u32 bias_source;
+	u32 vref_source;
+	u8 bias_cfg;
 	int ret;
 
-	ret = device_property_read_u8(adcx140->dev, "ti,mic-bias-source",
+	ret = device_property_read_u32(adcx140->dev, "ti,mic-bias-source",
 				      &bias_source);
 	if (ret)
 		bias_source = ADCX140_MIC_BIAS_VAL_VREF;
@@ -754,7 +755,7 @@ static int adcx140_codec_probe(struct snd_soc_component *component)
 		return -EINVAL;
 	}
 
-	ret = device_property_read_u8(adcx140->dev, "ti,vref-source",
+	ret = device_property_read_u32(adcx140->dev, "ti,vref-source",
 				      &vref_source);
 	if (ret)
 		vref_source = ADCX140_MIC_BIAS_VREF_275V;
@@ -765,7 +766,7 @@ static int adcx140_codec_probe(struct snd_soc_component *component)
 		return -EINVAL;
 	}
 
-	bias_source |= vref_source;
+	bias_cfg = bias_source << ADCX140_MIC_BIAS_SHIFT | vref_source;
 
 	ret = adcx140_reset(adcx140);
 	if (ret)
@@ -785,7 +786,7 @@ static int adcx140_codec_probe(struct snd_soc_component *component)
 
 	ret = regmap_update_bits(adcx140->regmap, ADCX140_BIAS_CFG,
 				ADCX140_MIC_BIAS_VAL_MSK |
-				ADCX140_MIC_BIAS_VREF_MSK, bias_source);
+				ADCX140_MIC_BIAS_VREF_MSK, bias_cfg);
 	if (ret)
 		dev_err(adcx140->dev, "setting MIC bias failed %d\n", ret);
 out:
diff --git a/sound/soc/codecs/tlv320adcx140.h b/sound/soc/codecs/tlv320adcx140.h
index 6d055e55909e..69de52d473f4 100644
--- a/sound/soc/codecs/tlv320adcx140.h
+++ b/sound/soc/codecs/tlv320adcx140.h
@@ -116,6 +116,7 @@
 #define ADCX140_MIC_BIAS_VAL_VREF_1096	1
 #define ADCX140_MIC_BIAS_VAL_AVDD	6
 #define ADCX140_MIC_BIAS_VAL_MSK GENMASK(6, 4)
+#define ADCX140_MIC_BIAS_SHIFT		4
 
 #define ADCX140_MIC_BIAS_VREF_275V	0
 #define ADCX140_MIC_BIAS_VREF_25V	1
-- 
2.26.2

Re: [PATCH] ASoC: tlv320adcx140: Fix bias config values

[Mark Brown]

On Wed, 13 May 2020 09:28:07 -0500, Dan Murphy wrote:
> The device tree binding declares the ti,mic-bias-source and the
> ti,vref-source properties as u32.  The code reads them as u8 which is
> incorrect.  Since the device tree binding indicates them as u32 the
> conde needs to be updated to read u32.
> 
> In addition the bias source needs to be shifted 4 bits to
> correctly write the register.
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.7

Thanks!

[1/1] ASoC: tlv320adcx140: Fix bias config values
      commit: 0e36f32f6b6c4c86a6bf3d6f0940831691b0a3b0

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