From: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
To: Mark Brown <broonie@kernel.org>, linux-spi@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Keiji Hayashibara <hayashibara.keiji@socionext.com>,
Masami Hiramatsu <masami.hiramatsu@linaro.org>,
Jassi Brar <jaswinder.singh@linaro.org>,
Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Subject: [PATCH 3/5] spi: uniphier: Add handle_err callback function
Date: Tue, 24 Dec 2019 09:58:25 +0900 [thread overview]
Message-ID: <1577149107-30670-4-git-send-email-hayashi.kunihiko@socionext.com> (raw)
In-Reply-To: <1577149107-30670-1-git-send-email-hayashi.kunihiko@socionext.com>
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>
---
drivers/spi/spi-uniphier.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/spi/spi-uniphier.c b/drivers/spi/spi-uniphier.c
index 3859649..c4e3b96 100644
--- a/drivers/spi/spi-uniphier.c
+++ b/drivers/spi/spi-uniphier.c
@@ -432,6 +432,22 @@ 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;
@@ -538,6 +554,7 @@ 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);
--
2.7.4
next prev parent reply other threads:[~2019-12-24 0:59 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-24 0:58 [PATCH 0/5] spi: uniphier: Introduce DMA transfer mode Kunihiko Hayashi
2019-12-24 0:58 ` [PATCH 1/5] spi: uniphier: Fix FIFO threshold Kunihiko Hayashi
2019-12-25 0:09 ` Applied "spi: uniphier: Fix FIFO threshold" to the spi tree Mark Brown
2019-12-24 0:58 ` [PATCH 2/5] spi: uniphier: Change argument of irq functions to private structure Kunihiko Hayashi
2019-12-25 0:09 ` Applied "spi: uniphier: Change argument of irq functions to private structure" to the spi tree Mark Brown
2019-12-24 0:58 ` Kunihiko Hayashi [this message]
2019-12-25 0:09 ` Applied "spi: uniphier: Add handle_err callback function" " Mark Brown
2019-12-24 0:58 ` [PATCH 4/5] spi: uniphier: Add SPI_LOOP to the capabilities Kunihiko Hayashi
2019-12-25 18:01 ` Mark Brown
2019-12-26 1:55 ` Kunihiko Hayashi
2019-12-24 0:58 ` [PATCH 5/5] spi: uniphier: Add DMA transfer mode support Kunihiko Hayashi
2019-12-25 18:22 ` Applied "spi: uniphier: Add DMA transfer mode support" to the spi tree Mark Brown
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