diff options
| author | Dilip Kota <eswara.kota@linux.intel.com> | 2020-07-17 08:27:51 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-07-22 02:55:54 +0200 |
| commit | ddf41bf782d2fb1df605407c7fff1160f488c949 (patch) | |
| tree | aab488339ad14549ba52a90ef59563e6a077cd6a /drivers/spi/spi-lantiq-ssc.c | |
| parent | spi: lantiq: fix: Rx overflow error in full duplex mode (diff) | |
| download | linux-ddf41bf782d2fb1df605407c7fff1160f488c949.tar.xz linux-ddf41bf782d2fb1df605407c7fff1160f488c949.zip | |
spi: lantiq: Add SMP support
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>
Diffstat (limited to 'drivers/spi/spi-lantiq-ssc.c')
| -rw-r--r-- | drivers/spi/spi-lantiq-ssc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/spi/spi-lantiq-ssc.c b/drivers/spi/spi-lantiq-ssc.c index 24585890996b..2ffe30354c13 100644 --- a/drivers/spi/spi-lantiq-ssc.c +++ b/drivers/spi/spi-lantiq-ssc.c @@ -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; } |