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authorKunihiko Hayashi <hayashi.kunihiko@socionext.com>2019-12-24 03:58:25 +0300
committerMark Brown <broonie@kernel.org>2019-12-25 03:08:18 +0300
commit11299c5cd8868479e9acfc525ba3c2e882c7ba0c (patch)
treeba3c404a20b36495bc1aa7562a8ae83d72013a60 /drivers/spi/spi-uniphier.c
parent9859db51387df8a7e8564a211158ff8bf263b0a8 (diff)
downloadlinux-11299c5cd8868479e9acfc525ba3c2e882c7ba0c.tar.xz
spi: uniphier: Add handle_err callback function
This adds master->handle_err() callback function to stop transfer due to error. The function also resets FIFOs and disables interrupt. Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> Link: https://lore.kernel.org/r/1577149107-30670-4-git-send-email-hayashi.kunihiko@socionext.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-uniphier.c')
-rw-r--r--drivers/spi/spi-uniphier.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/spi/spi-uniphier.c b/drivers/spi/spi-uniphier.c
index a44a1a5fb7b0..0b255597fdcb 100644
--- a/drivers/spi/spi-uniphier.c
+++ b/drivers/spi/spi-uniphier.c
@@ -425,6 +425,22 @@ static int uniphier_spi_unprepare_transfer_hardware(struct spi_master *master)
return 0;
}
+static void uniphier_spi_handle_err(struct spi_master *master,
+ struct spi_message *msg)
+{
+ struct uniphier_spi_priv *priv = spi_master_get_devdata(master);
+ u32 val;
+
+ /* stop running spi transfer */
+ writel(0, priv->base + SSI_CTL);
+
+ /* reset FIFOs */
+ val = SSI_FC_TXFFL | SSI_FC_RXFFL;
+ writel(val, priv->base + SSI_FC);
+
+ uniphier_spi_irq_disable(priv, SSI_IE_RCIE | SSI_IE_RORIE);
+}
+
static irqreturn_t uniphier_spi_handler(int irq, void *dev_id)
{
struct uniphier_spi_priv *priv = dev_id;
@@ -531,6 +547,7 @@ static int uniphier_spi_probe(struct platform_device *pdev)
= uniphier_spi_prepare_transfer_hardware;
master->unprepare_transfer_hardware
= uniphier_spi_unprepare_transfer_hardware;
+ master->handle_err = uniphier_spi_handle_err;
master->num_chipselect = 1;
ret = devm_spi_register_master(&pdev->dev, master);