diff options
author | Andrejs Cainikovs <andrejs.cainikovs@toradex.com> | 2024-04-04 10:31:09 +0200 |
---|---|---|
committer | Andrejs Cainikovs <andrejs.cainikovs@toradex.com> | 2024-04-18 11:58:32 +0200 |
commit | 616e42766ef0485a6b4f2ea5641ca45ba3c04788 (patch) | |
tree | fc03af6205119975ca109913492600a1233862d5 | |
parent | fe7a06e696819105f9e89f1e281a68e1c93e99f4 (diff) |
ASoC: nau8822: add MCLK support
This change adds MCLK clock handling directly within driver.
When used in combination with simple-audio-card, and mclk-fs is set,
simple-audio-card will change MCLK frequency before configuring PLL.
In some cases, however, MCLK reference clock should be static (see [1]),
which means it needs to be moved away from simple-audio-card.
[1]: https://lore.kernel.org/all/ZfBdxrzX3EnPuGOn@ediswmail9.ad.cirrus.com/
Upstream-Status: Submitted [https://lore.kernel.org/all/20240409121719.337709-3-andrejs.cainikovs@gmail.com/]
Signed-off-by: Andrejs Cainikovs <andrejs.cainikovs@toradex.com>
-rw-r--r-- | sound/soc/codecs/nau8822.c | 43 | ||||
-rw-r--r-- | sound/soc/codecs/nau8822.h | 1 |
2 files changed, 40 insertions, 4 deletions
diff --git a/sound/soc/codecs/nau8822.c b/sound/soc/codecs/nau8822.c index 88326c87107d..ab7535c50629 100644 --- a/sound/soc/codecs/nau8822.c +++ b/sound/soc/codecs/nau8822.c @@ -14,6 +14,7 @@ #include <linux/moduleparam.h> #include <linux/kernel.h> #include <linux/init.h> +#include <linux/clk.h> #include <linux/delay.h> #include <linux/pm.h> #include <linux/i2c.h> @@ -773,11 +774,26 @@ static int nau8822_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id, { struct snd_soc_component *component = dai->component; struct nau8822 *nau8822 = snd_soc_component_get_drvdata(component); + unsigned long mclk_freq; nau8822->div_id = clk_id; nau8822->sysclk = freq; + + if (nau8822->mclk) { + mclk_freq = clk_get_rate(nau8822->mclk); + if (mclk_freq != freq) { + int ret = nau8822_set_pll(dai, NAU8822_CLK_MCLK, + NAU8822_CLK_MCLK, mclk_freq, freq); + if (ret) { + dev_err(component->dev, "Failed to set PLL\n"); + return ret; + } + nau8822->div_id = NAU8822_CLK_PLL; + } + } + dev_dbg(component->dev, "master sysclk %dHz, source %s\n", freq, - clk_id == NAU8822_CLK_PLL ? "PLL" : "MCLK"); + nau8822->div_id == NAU8822_CLK_PLL ? "PLL" : "MCLK"); return 0; } @@ -848,7 +864,7 @@ static int nau8822_hw_params(struct snd_pcm_substream *substream, { struct snd_soc_component *component = dai->component; struct nau8822 *nau8822 = snd_soc_component_get_drvdata(component); - int val_len = 0, val_rate = 0; + int div = 0, val_len = 0, val_rate = 0; unsigned int ctrl_val, bclk_fs, bclk_div; /* make BCLK and LRC divide configuration if the codec as master. */ @@ -915,8 +931,10 @@ static int nau8822_hw_params(struct snd_pcm_substream *substream, /* If the master clock is from MCLK, provide the runtime FS for driver * to get the master clock prescaler configuration. */ - if (nau8822->div_id == NAU8822_CLK_MCLK) - nau8822_config_clkdiv(dai, 0, params_rate(params)); + if (nau8822->div_id != NAU8822_CLK_MCLK) + div = nau8822->pll.mclk_scaler; + + nau8822_config_clkdiv(dai, div, params_rate(params)); return 0; } @@ -940,12 +958,23 @@ static int nau8822_mute(struct snd_soc_dai *dai, int mute, int direction) static int nau8822_set_bias_level(struct snd_soc_component *component, enum snd_soc_bias_level level) { + struct nau8822 *nau8822 = snd_soc_component_get_drvdata(component); + switch (level) { case SND_SOC_BIAS_ON: case SND_SOC_BIAS_PREPARE: snd_soc_component_update_bits(component, NAU8822_REG_POWER_MANAGEMENT_1, NAU8822_REFIMP_MASK, NAU8822_REFIMP_80K); + if (nau8822->mclk) { + int ret = clk_prepare_enable(nau8822->mclk); + + if (ret) { + dev_err(component->dev, + "Failed to enable MCLK: %d\n", ret); + return ret; + } + } break; case SND_SOC_BIAS_STANDBY: @@ -973,6 +1002,7 @@ static int nau8822_set_bias_level(struct snd_soc_component *component, NAU8822_REG_POWER_MANAGEMENT_2, 0); snd_soc_component_write(component, NAU8822_REG_POWER_MANAGEMENT_3, 0); + clk_disable_unprepare(nau8822->mclk); break; } @@ -1125,6 +1155,11 @@ static int nau8822_i2c_probe(struct i2c_client *i2c) } i2c_set_clientdata(i2c, nau8822); + nau8822->mclk = devm_clk_get_optional(&i2c->dev, "mclk"); + if (IS_ERR(nau8822->mclk)) + return dev_err_probe(&i2c->dev, PTR_ERR(nau8822->mclk), + "Error getting mclk\n"); + nau8822->regmap = devm_regmap_init_i2c(i2c, &nau8822_regmap_config); if (IS_ERR(nau8822->regmap)) { ret = PTR_ERR(nau8822->regmap); diff --git a/sound/soc/codecs/nau8822.h b/sound/soc/codecs/nau8822.h index 646f6bb64bc5..ad6236a75c39 100644 --- a/sound/soc/codecs/nau8822.h +++ b/sound/soc/codecs/nau8822.h @@ -215,6 +215,7 @@ struct nau8822_pll { struct nau8822 { struct device *dev; struct regmap *regmap; + struct clk *mclk; int mclk_idx; struct nau8822_pll pll; int sysclk; |