Add suspend and resume sleep callbacks,
to support system low power modes.
Signed-off-by: Olivier Moysan <olivier.moy...@st.com>
---
sound/soc/stm/stm32_i2s.c | 33 ++++++++++++++++++++++++++++++---
1 file changed, 30 insertions(+), 3 deletions(-)
diff --git a/sound/soc/stm/stm32_i2s.c b/sound/soc/stm/stm32_i2s.c
index 6d0bf78d114d..dbe23a709d24 100644
--- a/sound/soc/stm/stm32_i2s.c
+++ b/sound/soc/stm/stm32_i2s.c
@@ -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,
--
2.7.4
