If master clock is provided through device tree, then update the master clock frequency during set_sysclk.
Documentation has been updated to reflect the change. Signed-off-by: Tushar Behera <[email protected]> --- .../devicetree/bindings/sound/max98095.txt | 6 ++++++ sound/soc/codecs/max98095.c | 14 ++++++++++++++ 2 files changed, 20 insertions(+) diff --git a/Documentation/devicetree/bindings/sound/max98095.txt b/Documentation/devicetree/bindings/sound/max98095.txt index bacbeaa..318a4c8 100644 --- a/Documentation/devicetree/bindings/sound/max98095.txt +++ b/Documentation/devicetree/bindings/sound/max98095.txt @@ -8,6 +8,12 @@ Required properties: - reg : The I2C address of the device. +Optional properties: + +- clocks: The phandle of the master clock to the CODEC + +- clock-names: Should be "mclk" + Example: max98095: codec@11 { diff --git a/sound/soc/codecs/max98095.c b/sound/soc/codecs/max98095.c index d6c1e4c..4d66b95 100644 --- a/sound/soc/codecs/max98095.c +++ b/sound/soc/codecs/max98095.c @@ -15,6 +15,7 @@ #include <linux/delay.h> #include <linux/pm.h> #include <linux/i2c.h> +#include <linux/clk.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> @@ -42,6 +43,7 @@ struct max98095_priv { struct regmap *regmap; enum max98095_type devtype; struct max98095_pdata *pdata; + struct clk *mclk; unsigned int sysclk; struct max98095_cdata dai[3]; const char **eq_texts; @@ -1395,6 +1397,11 @@ static int max98095_dai_set_sysclk(struct snd_soc_dai *dai, if (freq == max98095->sysclk) return 0; + if (!IS_ERR(max98095->mclk)) { + freq = clk_round_rate(max98095->mclk, freq); + clk_set_rate(max98095->mclk, freq); + } + /* Setup clocks for slave mode, and using the PLL * PSCLK = 0x01 (when master clk is 10MHz to 20MHz) * 0x02 (when master clk is 20MHz to 40MHz).. @@ -2238,6 +2245,10 @@ static int max98095_probe(struct snd_soc_codec *codec) struct i2c_client *client; int ret = 0; + max98095->mclk = devm_clk_get(codec->dev, "mclk"); + if (!IS_ERR(max98095->mclk)) + clk_prepare_enable(max98095->mclk); + /* reset the codec, the DSP core, and disable all interrupts */ max98095_reset(codec); @@ -2340,6 +2351,9 @@ static int max98095_remove(struct snd_soc_codec *codec) if (max98095->headphone_jack || max98095->mic_jack) max98095_jack_detect_disable(codec); + if (!IS_ERR(max98095->mclk)) + clk_disable_unprepare(max98095->mclk); + if (client->irq) free_irq(client->irq, codec); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
