On newer chipsets interrupt need to be acknowledged as they use
different interrupt controller which does not acknowledge the
interrupts automatically.
Signed-off-by: Dilip Kota <eswara.kota@xxxxxxxxxxxxxxx>
---
drivers/spi/spi-lantiq-ssc.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/spi/spi-lantiq-ssc.c b/drivers/spi/spi-lantiq-ssc.c
index 98e1c5d807597..cbe019f995999 100644
--- a/drivers/spi/spi-lantiq-ssc.c
+++ b/drivers/spi/spi-lantiq-ssc.c
@@ -161,6 +161,7 @@ struct lantiq_ssc_hwcfg {
unsigned int irnen_t;
unsigned int irncr;
unsigned int irnicr;
+ bool irq_ack;
};
struct lantiq_ssc_spi {
@@ -623,9 +624,14 @@ static void rx_request(struct lantiq_ssc_spi *spi)
static irqreturn_t lantiq_ssc_xmit_interrupt(int irq, void *data)
{
struct lantiq_ssc_spi *spi = data;
+ const struct lantiq_ssc_hwcfg *hwcfg = spi->hwcfg;
+ u32 val = lantiq_ssc_readl(spi, hwcfg->irncr);
unsigned long flags;
spin_lock_irqsave(&spi->lock, flags);
+ if (hwcfg->irq_ack)
+ lantiq_ssc_writel(spi, val, hwcfg->irncr);
+
if (spi->tx) {
if (spi->rx && spi->rx_todo)
rx_fifo_read_full_duplex(spi);
@@ -660,13 +666,18 @@ static irqreturn_t lantiq_ssc_xmit_interrupt(int irq, void *data)
static irqreturn_t lantiq_ssc_err_interrupt(int irq, void *data)
{
struct lantiq_ssc_spi *spi = data;
+ const struct lantiq_ssc_hwcfg *hwcfg = spi->hwcfg;
u32 stat = lantiq_ssc_readl(spi, LTQ_SPI_STAT);
+ u32 val = lantiq_ssc_readl(spi, hwcfg->irncr);
unsigned long flags;
if (!(stat & LTQ_SPI_STAT_ERRORS))
return IRQ_NONE;
spin_lock_irqsave(&spi->lock, flags);
+ if (hwcfg->irq_ack)
+ lantiq_ssc_writel(spi, val, hwcfg->irncr);
+
if (stat & LTQ_SPI_STAT_RUE)
dev_err(spi->dev, "receive underflow error\n");
if (stat & LTQ_SPI_STAT_TUE)
@@ -797,6 +808,7 @@ static const struct lantiq_ssc_hwcfg lantiq_ssc_xway = {
.irnen_t = LTQ_SPI_IRNEN_T_XWAY,
.irnicr = 0xF8,
.irncr = 0xFC,
+ .irq_ack = false,
};
static const struct lantiq_ssc_hwcfg lantiq_ssc_xrx = {
@@ -804,6 +816,7 @@ static const struct lantiq_ssc_hwcfg lantiq_ssc_xrx = {
.irnen_t = LTQ_SPI_IRNEN_T_XRX,
.irnicr = 0xF8,
.irncr = 0xFC,
+ .irq_ack = false,
};
static const struct of_device_id lantiq_ssc_match[] = {
--
2.11.0
