spi: bcm2835: Implement shutdown callback

Make sure we clear the FIFOs, stop the block, disable the clock and
release the DMA channel.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20200528190605.24850-1-f.fainelli@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c
index 20d8581..237bd30 100644 (file)
--- a/drivers/spi/spi-bcm2835.c
+++ b/drivers/spi/spi-bcm2835.c
@@ -1391,6 +1391,15 @@ static int bcm2835_spi_remove(struct platform_device *pdev)
        return 0;
 }
 
+static void bcm2835_spi_shutdown(struct platform_device *pdev)
+{
+       int ret;
+
+       ret = bcm2835_spi_remove(pdev);
+       if (ret)
+               dev_err(&pdev->dev, "failed to shutdown\n");
+}
+
 static const struct of_device_id bcm2835_spi_match[] = {
        { .compatible = "brcm,bcm2835-spi", },
        {}
@@ -1404,6 +1413,7 @@ static struct platform_driver bcm2835_spi_driver = {
        },
        .probe          = bcm2835_spi_probe,
        .remove         = bcm2835_spi_remove,
+       .shutdown       = bcm2835_spi_shutdown,
 };
 module_platform_driver(bcm2835_spi_driver);