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| author | Kunihiko Hayashi <hayashi.kunihiko@socionext.com> | 2019-12-24 09:58:25 +0900 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-12-25 00:08:18 +0000 |
| commit | 11299c5cd8868479e9acfc525ba3c2e882c7ba0c (patch) | |
| tree | ba3c404a20b36495bc1aa7562a8ae83d72013a60 /drivers/spi/spi-uniphier.c | |
| parent | 9859db51387df8a7e8564a211158ff8bf263b0a8 (diff) | |
| download | linux-11299c5cd8868479e9acfc525ba3c2e882c7ba0c.tar.gz linux-11299c5cd8868479e9acfc525ba3c2e882c7ba0c.tar.bz2 linux-11299c5cd8868479e9acfc525ba3c2e882c7ba0c.zip | |
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.c | 17 |
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); |