wm5110: fixes to ANC clock control

The register for ANC clock control has a combination of volatile and non-readback bits and these two patches fix the way we write to this register.

Both patches must be taken together to ensure correct operation.

Richard Fitzgerald (2):
mfd: wm5110: ARIZONA_CLOCK_CONTROL should be volatile
ASoC: arizona: No need to update_bits when writing AEC clock control

 drivers/mfd/wm5110-tables.c | 1 +
 sound/soc/codecs/arizona.c  | 3 +--
 2 files changed, 2 insertions(+), 2 deletions(-)

1.9.1

Some of the bits in this register can be changed by the codec so we must mark it volatile.

---
 drivers/mfd/wm5110-tables.c | 1 +
 1 file changed, 1 insertion(+)

index 8e74e71..1ee68bd 100644
@@ -3066,6 +3066,7 @@ static bool wm5110_volatile_register(struct device *dev, unsigned int reg)
 	case ARIZONA_AOD_IRQ_RAW_STATUS:
 	case ARIZONA_FX_CTRL2:
 	case ARIZONA_ASRC_STATUS:
+	case ARIZONA_CLOCK_CONTROL:
 	case ARIZONA_DSP_STATUS:
 	case ARIZONA_DSP1_STATUS_1:
 	case ARIZONA_DSP1_STATUS_2:

1.9.1

Applied, thanks.

Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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The bits in the ARIZONA_CLOCK_CONTROL register only respond to writes of a '1', a write of '0' is ignored. So there's no need to use update_bits. We can do a simple write to set bits.

---
 sound/soc/codecs/arizona.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

index 0cd27e0..e255740 100644
@@ -1126,7 +1126,6 @@ int arizona_anc_ev(struct snd_soc_dapm_widget *w,
 		   int event)
 {
 	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
-	unsigned int mask = 0x3 << w->shift;
 	unsigned int val;
 
 	switch (event) {

@@ -1140,7 +1139,7 @@ int arizona_anc_ev(struct snd_soc_dapm_widget *w,
 		return 0;
 	}
 
-	snd_soc_update_bits(codec, ARIZONA_CLOCK_CONTROL, mask, val);
+	snd_soc_write(codec, ARIZONA_CLOCK_CONTROL, val);
 
 	return 0;
 }

1.9.1

The patch

ASoC: arizona: No need to update_bits when writing AEC clock control

has been applied to the asoc tree at

git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git

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

From: Richard Fitzgerald <[email protected]>
Date: Tue, 26 Apr 2016 17:06:20 +0100
Subject: [PATCH] ASoC: arizona: No need to update_bits when writing AEC clock
control

The bits in the ARIZONA_CLOCK_CONTROL register only respond to writes of a '1', a write of '0' is ignored. So there's no need to use update_bits. We can do a simple write to set bits.

---
 sound/soc/codecs/arizona.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

index 0caecc6f78df..0239639823b1 100644
@@ -1124,7 +1124,6 @@ int arizona_anc_ev(struct snd_soc_dapm_widget *w,
 		   int event)
 {
 	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
-	unsigned int mask = 0x3 << w->shift;
 	unsigned int val;
 
 	switch (event) {

@@ -1138,7 +1137,7 @@ int arizona_anc_ev(struct snd_soc_dapm_widget *w,
 		return 0;
 	}
 
-	snd_soc_update_bits(codec, ARIZONA_CLOCK_CONTROL, mask, val);
+	snd_soc_write(codec, ARIZONA_CLOCK_CONTROL, val);
 
 	return 0;
 }

2.8.0.rc3