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i2c: designware: Simplify slave interrupt handler nesting 

Interrupt processing code in i2c-designware-slave.c is bit more readable
if not divided into another subroutine. Also explicit IRQ_NONE and
IRQ_HANDLED return values are more obvious.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Jarkko Nikula 2022-11-07 15:42:42 +02:00 committed by Wolfram Sang
parent 5cd6985030
commit 4c7107c297
1 changed files with 4 additions and 14 deletions
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18
drivers/i2c/busses/i2c-designware-slave.c
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@ -147,9 +147,9 @@ static u32 i2c_dw_read_clear_intrbits_slave(struct dw_i2c_dev *dev)
* Interrupt service routine. This gets called whenever an I2C slave interrupt
* occurs.
*/
static int i2c_dw_irq_handler_slave(struct dw_i2c_dev *dev)
static irqreturn_t i2c_dw_isr_slave(int this_irq, void *dev_id)
{
struct dw_i2c_dev *dev = dev_id;
u32 raw_stat, stat, enabled, tmp;
u8 val = 0, slave_activity;
@ -159,7 +159,7 @@ static int i2c_dw_irq_handler_slave(struct dw_i2c_dev *dev)
slave_activity = ((tmp & DW_IC_STATUS_SLAVE_ACTIVITY) >> 6);
if (!enabled || !(raw_stat & ~DW_IC_INTR_ACTIVITY) || !dev->slave)
return 0;
return IRQ_NONE;
stat = i2c_dw_read_clear_intrbits_slave(dev);
dev_dbg(dev->dev,
@ -205,17 +205,7 @@ static int i2c_dw_irq_handler_slave(struct dw_i2c_dev *dev)
if (stat & DW_IC_INTR_STOP_DET)
i2c_slave_event(dev->slave, I2C_SLAVE_STOP, &val);
return 1;
}
static irqreturn_t i2c_dw_isr_slave(int this_irq, void *dev_id)
{
struct dw_i2c_dev *dev = dev_id;
int ret;
ret = i2c_dw_irq_handler_slave(dev);
return IRQ_RETVAL(ret);
return IRQ_HANDLED;
}
static const struct i2c_algorithm i2c_dw_algo = {