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spi: lantiq: Add SMP support

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Existing driver supports only single core SoC. New multicore platforms uses
the same driver/IP so SMP support is required. This patch adds multicore
support in the driver.

Signed-off-by: Dilip Kota <eswara.kota@linux.intel.com>
Link: https://lore.kernel.org/r/d6663296b41f102c582fda08e71f62b72ca05d5d.1594957019.git.eswara.kota@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Dilip Kota 2020-07-17 14:27:51 +08:00 committed by Mark Brown
parent 661ccf2b3f
commit ddf41bf782
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 7 additions and 0 deletions
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7
drivers/spi/spi-lantiq-ssc.c
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@ -622,7 +622,9 @@ 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;
unsigned long flags;
spin_lock_irqsave(&spi->lock, flags);
if (spi->tx) {
if (spi->rx && spi->rx_todo)
rx_fifo_read_full_duplex(spi);
@ -644,10 +646,12 @@ static irqreturn_t lantiq_ssc_xmit_interrupt(int irq, void *data)
}
}
spin_unlock_irqrestore(&spi->lock, flags);
return IRQ_HANDLED;
completed:
queue_work(spi->wq, &spi->work);
spin_unlock_irqrestore(&spi->lock, flags);
return IRQ_HANDLED;
}
@ -656,10 +660,12 @@ static irqreturn_t lantiq_ssc_err_interrupt(int irq, void *data)
{
struct lantiq_ssc_spi *spi = data;
u32 stat = lantiq_ssc_readl(spi, LTQ_SPI_STAT);
unsigned long flags;
if (!(stat & LTQ_SPI_STAT_ERRORS))
return IRQ_NONE;
spin_lock_irqsave(&spi->lock, flags);
if (stat & LTQ_SPI_STAT_RUE)
dev_err(spi->dev, "receive underflow error\n");
if (stat & LTQ_SPI_STAT_TUE)
@ -680,6 +686,7 @@ static irqreturn_t lantiq_ssc_err_interrupt(int irq, void *data)
if (spi->master->cur_msg)
spi->master->cur_msg->status = -EIO;
queue_work(spi->wq, &spi->work);
spin_unlock_irqrestore(&spi->lock, flags);
return IRQ_HANDLED;
}