Unverified Commit 11299c5c authored by Kunihiko Hayashi's avatar Kunihiko Hayashi Committed by Mark Brown
Browse files

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: default avatarKunihiko Hayashi <hayashi.kunihiko@socionext.com>
Link: https://lore.kernel.org/r/1577149107-30670-4-git-send-email-hayashi.kunihiko@socionext.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 9859db51

drivers/spi/spi-uniphier.c

+17 −0
Original line number Diff line number Diff line
@@ -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);

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