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ASoC: stm32: i2s: add power management

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Add suspend and resume sleep callbacks,
to support system low power modes.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Olivier Moysan 2019-02-08 11:49:53 +01:00 committed by Mark Brown
parent d9186330c8
commit 307cce4a00
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GPG Key ID: 24D68B725D5487D0
1 changed files with 30 additions and 3 deletions
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33
sound/soc/stm/stm32_i2s.c
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@ -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
@ -596,8 +597,8 @@ static int stm32_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
return ret;
}
ret = regmap_update_bits(i2s->regmap, STM32_I2S_CR1_REG,
I2S_CR1_CSTART, I2S_CR1_CSTART);
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);
return 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,