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spi: uniphier: Add handle_err callback function

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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>
This commit is contained in:
Kunihiko Hayashi 2019-12-24 09:58:25 +09:00 committed by Mark Brown
parent 9859db5138
commit 11299c5cd8
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GPG Key ID: 24D68B725D5487D0
1 changed files with 17 additions and 0 deletions
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17
drivers/spi/spi-uniphier.c
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@ -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);