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spi: fsl-espi: improve and simplify interrupt handler

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Simplify the interrupt handler a little. In addition don't call
fsl_espi_cpu_irq() if no event bit is set.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Heiner Kallweit 2016-09-13 23:15:57 +02:00 committed by Mark Brown
parent d198ebfb75
commit 35f5d71e38
1 changed files with 6 additions and 10 deletions
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16
drivers/spi/spi-fsl-espi.c
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@ -443,17 +443,11 @@ static void fsl_espi_cpu_irq(struct mpc8xxx_spi *mspi, u32 events)
&reg_base->event)) & SPIE_NF), 1000, 0);
if (!ret) {
dev_err(mspi->dev, "tired waiting for SPIE_NF\n");
/* Clear the SPIE bits */
mpc8xxx_spi_write_reg(&reg_base->event, events);
complete(&mspi->done);
return;
}
}
/* Clear the events */
mpc8xxx_spi_write_reg(&reg_base->event, events);
mspi->count -= 1;
if (mspi->count) {
u32 word = mspi->get_tx(mspi);
@ -468,19 +462,21 @@ static irqreturn_t fsl_espi_irq(s32 irq, void *context_data)
{
struct mpc8xxx_spi *mspi = context_data;
struct fsl_espi_reg *reg_base = mspi->reg_base;
irqreturn_t ret = IRQ_NONE;
u32 events;
/* Get interrupt events(tx/rx) */
events = mpc8xxx_spi_read_reg(&reg_base->event);
if (events)
ret = IRQ_HANDLED;
if (!events)
return IRQ_NONE;
dev_vdbg(mspi->dev, "%s: events %x\n", __func__, events);
fsl_espi_cpu_irq(mspi, events);
return ret;
/* Clear the events */
mpc8xxx_spi_write_reg(&reg_base->event, events);
return IRQ_HANDLED;
}
#ifdef CONFIG_PM