The patch
ASoC: codecs: ad193x: Add support to disable on-chip PLL
has been applied to the asoc tree at
https://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.
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Thanks, Mark
From 59529473751e987e28c926838f70aaef588b83b0 Mon Sep 17 00:00:00 2001
From: Codrin Ciubotariu codrin.ciubotariu@microchip.com Date: Mon, 18 Feb 2019 16:10:36 +0000 Subject: [PATCH] ASoC: codecs: ad193x: Add support to disable on-chip PLL
The on-chip PLL can be disabled if on the MCLKI pin we have an external clock at 512 x fs. This clock can be used as direct internal clock for ADCs or DACs. To support this, we add an extra clock id that can be configured using the set_sysclk() callback.
Signed-off-by: Codrin Ciubotariu codrin.ciubotariu@microchip.com Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/codecs/ad193x.c | 26 +++++++++++++++++++++++++- sound/soc/codecs/ad193x.h | 8 ++++++++ 2 files changed, 33 insertions(+), 1 deletion(-)
diff --git a/sound/soc/codecs/ad193x.c b/sound/soc/codecs/ad193x.c index f8cf182518a3..96d7cb2e4a56 100644 --- a/sound/soc/codecs/ad193x.c +++ b/sound/soc/codecs/ad193x.c @@ -100,6 +100,15 @@ static const struct snd_soc_dapm_widget ad193x_adc_widgets[] = { SND_SOC_DAPM_INPUT("ADC2IN"), };
+static int ad193x_check_pll(struct snd_soc_dapm_widget *source, + struct snd_soc_dapm_widget *sink) +{ + struct snd_soc_component *component = snd_soc_dapm_to_component(source->dapm); + struct ad193x_priv *ad193x = snd_soc_component_get_drvdata(component); + + return !!ad193x->sysclk; +} + static const struct snd_soc_dapm_route audio_paths[] = { { "DAC", NULL, "SYSCLK" }, { "DAC Output", NULL, "DAC" }, @@ -108,7 +117,7 @@ static const struct snd_soc_dapm_route audio_paths[] = { { "DAC2OUT", NULL, "DAC Output" }, { "DAC3OUT", NULL, "DAC Output" }, { "DAC4OUT", NULL, "DAC Output" }, - { "SYSCLK", NULL, "PLL_PWR" }, + { "SYSCLK", NULL, "PLL_PWR", &ad193x_check_pll }, };
static const struct snd_soc_dapm_route ad193x_adc_audio_paths[] = { @@ -276,7 +285,22 @@ static int ad193x_set_dai_sysclk(struct snd_soc_dai *codec_dai, int clk_id, unsigned int freq, int dir) { struct snd_soc_component *component = codec_dai->component; + struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component); struct ad193x_priv *ad193x = snd_soc_component_get_drvdata(component); + + if (clk_id == AD193X_SYSCLK_MCLK) { + /* MCLK must be 512 x fs */ + if (dir == SND_SOC_CLOCK_OUT || freq != 24576000) + return -EINVAL; + + regmap_update_bits(ad193x->regmap, AD193X_PLL_CLK_CTRL1, + AD193X_PLL_SRC_MASK, + AD193X_PLL_DAC_SRC_MCLK | + AD193X_PLL_CLK_SRC_MCLK); + + snd_soc_dapm_sync(dapm); + return 0; + } switch (freq) { case 12288000: case 18432000: diff --git a/sound/soc/codecs/ad193x.h b/sound/soc/codecs/ad193x.h index 8b1e65f928d2..27d6afbd7dfb 100644 --- a/sound/soc/codecs/ad193x.h +++ b/sound/soc/codecs/ad193x.h @@ -31,6 +31,11 @@ int ad193x_probe(struct device *dev, struct regmap *regmap, #define AD193X_PLL_INPUT_512 (2 << 1) #define AD193X_PLL_INPUT_768 (3 << 1) #define AD193X_PLL_CLK_CTRL1 0x01 +#define AD193X_PLL_SRC_MASK 0x03 +#define AD193X_PLL_DAC_SRC_PLL 0 +#define AD193X_PLL_DAC_SRC_MCLK 1 +#define AD193X_PLL_CLK_SRC_PLL (0 << 1) +#define AD193X_PLL_CLK_SRC_MCLK (1 << 1) #define AD193X_DAC_CTRL0 0x02 #define AD193X_DAC_POWERDOWN 0x01 #define AD193X_DAC_SERFMT_MASK 0xC0 @@ -96,4 +101,7 @@ int ad193x_probe(struct device *dev, struct regmap *regmap,
#define AD193X_NUM_REGS 17
+#define AD193X_SYSCLK_PLL 0 +#define AD193X_SYSCLK_MCLK 1 + #endif