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ASoC: stm32: i2s: fix IRQ clearing 

Because of regmap cache, interrupts may not be cleared
as expected.
Declare IFCR register as write only and make writings
to IFCR register unconditional.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Olivier Moysan 2019-02-26 14:51:04 +01:00 committed by Mark Brown
parent ae3f563a85
commit 8ba3c5215d
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 6 additions and 7 deletions
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13
sound/soc/stm/stm32_i2s.c
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@ -247,8 +247,8 @@ static irqreturn_t stm32_i2s_isr(int irq, void *devid)
return IRQ_NONE;
}
regmap_update_bits(i2s->regmap, STM32_I2S_IFCR_REG,
I2S_IFCR_MASK, flags);
regmap_write_bits(i2s->regmap, STM32_I2S_IFCR_REG,
I2S_IFCR_MASK, flags);
if (flags & I2S_SR_OVR) {
dev_dbg(&pdev->dev, "Overrun\n");
@ -277,7 +277,6 @@ static bool stm32_i2s_readable_reg(struct device *dev, unsigned int reg)
case STM32_I2S_CFG2_REG:
case STM32_I2S_IER_REG:
case STM32_I2S_SR_REG:
case STM32_I2S_IFCR_REG:
case STM32_I2S_TXDR_REG:
case STM32_I2S_RXDR_REG:
case STM32_I2S_CGFR_REG:
@ -559,8 +558,8 @@ static int stm32_i2s_startup(struct snd_pcm_substream *substream,
i2s->refcount++;
spin_unlock(&i2s->lock_fd);
return regmap_update_bits(i2s->regmap, STM32_I2S_IFCR_REG,
I2S_IFCR_MASK, I2S_IFCR_MASK);
return regmap_write_bits(i2s->regmap, STM32_I2S_IFCR_REG,
I2S_IFCR_MASK, I2S_IFCR_MASK);
}
static int stm32_i2s_hw_params(struct snd_pcm_substream *substream,
@ -611,8 +610,8 @@ static int stm32_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
return ret;
}
regmap_update_bits(i2s->regmap, STM32_I2S_IFCR_REG,
I2S_IFCR_MASK, I2S_IFCR_MASK);
regmap_write_bits(i2s->regmap, STM32_I2S_IFCR_REG,
I2S_IFCR_MASK, I2S_IFCR_MASK);
if (playback_flg) {
ier = I2S_IER_UDRIE;