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i2c: stm32f7: perform I2C_ISR read once at beginning of event isr

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Move readl_relaxed of I2C_ISR register at beginning of event isr
so that it done once for both master & slave handling.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Alain Volmat 2023-12-15 18:06:09 +01:00 committed by Wolfram Sang
parent bf12998e1a
commit a058b24c08
1 changed files with 5 additions and 7 deletions
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12
drivers/i2c/busses/i2c-stm32f7.c
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@ -1419,15 +1419,13 @@ static bool stm32f7_i2c_is_slave_busy(struct stm32f7_i2c_dev *i2c_dev)
return i == busy;
}
static irqreturn_t stm32f7_i2c_slave_isr_event(struct stm32f7_i2c_dev *i2c_dev)
static irqreturn_t stm32f7_i2c_slave_isr_event(struct stm32f7_i2c_dev *i2c_dev, u32 status)
{
void __iomem *base = i2c_dev->base;
u32 cr2, status, mask;
u32 cr2, mask;
u8 val;
int ret;
status = readl_relaxed(i2c_dev->base + STM32F7_I2C_ISR);
/* Slave transmitter mode */
if (status & STM32F7_I2C_ISR_TXIS) {
i2c_slave_event(i2c_dev->slave_running,
@ -1531,11 +1529,11 @@ static irqreturn_t stm32f7_i2c_isr_event_thread(int irq, void *data)
u32 status, mask;
int ret;
if (!i2c_dev->master_mode)
return stm32f7_i2c_slave_isr_event(i2c_dev);
status = readl_relaxed(i2c_dev->base + STM32F7_I2C_ISR);
if (!i2c_dev->master_mode)
return stm32f7_i2c_slave_isr_event(i2c_dev, status);
/* NACK received */
if (status & STM32F7_I2C_ISR_NACKF) {
dev_dbg(i2c_dev->dev, "<%s>: Receive NACK (addr %x)\n",