ASoC: stm32: i2s: add power management (307cce4a) · Commits · 戴 / test

sound/soc/stm/stm32_i2s.c

+30 −3

Original line number	Diff line number	Diff line
		@@ -186,8 +186,9 @@ enum i2s_datlen {
		#define STM32_I2S_IS_SLAVE(x) ((x)->ms_flg == I2S_MS_SLAVE)

		/**
		* struct stm32_i2s_data - private data of I2S
		* @regmap_conf: I2S register map configuration pointer
		* @egmap: I2S register map pointer
		* @regmap: I2S register map pointer
		* @pdev: device data pointer
		* @dai_drv: DAI driver pointer
		* @dma_data_tx: dma configuration data for tx channel
		@@ -596,7 +597,7 @@ static int stm32_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
		return ret;
		}

		ret = regmap_update_bits(i2s->regmap, STM32_I2S_CR1_REG,
		ret = regmap_write_bits(i2s->regmap, STM32_I2S_CR1_REG,
		I2S_CR1_CSTART, I2S_CR1_CSTART);
		if (ret < 0) {
		dev_err(cpu_dai->dev, "Error %d starting I2S\n", ret);
		@@ -703,6 +704,7 @@ static const struct regmap_config stm32_h7_i2s_regmap_conf = {
		.volatile_reg = stm32_i2s_volatile_reg,
		.writeable_reg = stm32_i2s_writeable_reg,
		.fast_io = true,
		.cache_type = REGCACHE_FLAT,
		};

		static const struct snd_soc_dai_ops stm32_i2s_pcm_dai_ops = {
		@@ -929,10 +931,35 @@ static int stm32_i2s_remove(struct platform_device *pdev)

		MODULE_DEVICE_TABLE(of, stm32_i2s_ids);

		#ifdef CONFIG_PM_SLEEP
		static int stm32_i2s_suspend(struct device *dev)
		{
		struct stm32_i2s_data *i2s = dev_get_drvdata(dev);

		regcache_cache_only(i2s->regmap, true);
		regcache_mark_dirty(i2s->regmap);

		return 0;
		}

		static int stm32_i2s_resume(struct device *dev)
		{
		struct stm32_i2s_data *i2s = dev_get_drvdata(dev);

		regcache_cache_only(i2s->regmap, false);
		return regcache_sync(i2s->regmap);
		}
		#endif /* CONFIG_PM_SLEEP */

		static const struct dev_pm_ops stm32_i2s_pm_ops = {
		SET_SYSTEM_SLEEP_PM_OPS(stm32_i2s_suspend, stm32_i2s_resume)
		};

		static struct platform_driver stm32_i2s_driver = {
		.driver = {
		.name = "st,stm32-i2s",
		.of_match_table = stm32_i2s_ids,
		.pm = &stm32_i2s_pm_ops,
		},
		.probe = stm32_i2s_probe,
		.remove = stm32_i2s_remove,

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