From: Olivier Moysan olivier.moysan@st.com
commit 8ba3c5215d69c09f5c39783ff3b78347769822ad upstream.
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 Signed-off-by: Mathieu Poirier mathieu.poirier@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- sound/soc/stm/stm32_i2s.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-)
--- a/sound/soc/stm/stm32_i2s.c +++ b/sound/soc/stm/stm32_i2s.c @@ -246,8 +246,8 @@ static irqreturn_t stm32_i2s_isr(int irq 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"); @@ -276,7 +276,6 @@ static bool stm32_i2s_readable_reg(struc 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: @@ -547,8 +546,8 @@ static int stm32_i2s_startup(struct snd_ 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, @@ -603,8 +602,8 @@ static int stm32_i2s_trigger(struct snd_ 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;