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SubjectApplied "spi: dspi: clear SPI_SR before enable interrupt" to the spi tree
The patch

spi: dspi: clear SPI_SR before enable interrupt

has been applied to the spi tree at


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tree (usually sometime in the next 24 hours) and sent to Linus during
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From 5ee67b587a2b0092bdea3123349c8c3c43e8e46e Mon Sep 17 00:00:00 2001
From: Yuan Yao <>
Date: Mon, 17 Oct 2016 18:02:34 +0800
Subject: [PATCH] spi: dspi: clear SPI_SR before enable interrupt

Once dspi is used in uboot, the SPI_SR have been set by some value.
At this time, if kernel enable the interrupt before clear the
status flag, that will trigger the wrong interrupt.

Signed-off-by: Yuan Yao <>
Signed-off-by: Mark Brown <>
drivers/spi/spi-fsl-dspi.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index 35c0dd945668..a67b0ff6a362 100644
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -70,6 +70,7 @@
#define SPI_SR 0x2c
#define SPI_SR_EOQF 0x10000000
#define SPI_SR_TCFQF 0x80000000
+#define SPI_SR_CLEAR 0xdaad0000

#define SPI_RSER 0x30
#define SPI_RSER_EOQFE 0x10000000
@@ -646,6 +647,11 @@ static const struct regmap_config dspi_regmap_config = {
.max_register = 0x88,

+static void dspi_init(struct fsl_dspi *dspi)
+ regmap_write(dspi->regmap, SPI_SR, SPI_SR_CLEAR);
static int dspi_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
@@ -709,6 +715,7 @@ static int dspi_probe(struct platform_device *pdev)
return PTR_ERR(dspi->regmap);

+ dspi_init(dspi);
dspi->irq = platform_get_irq(pdev, 0);
if (dspi->irq < 0) {
dev_err(&pdev->dev, "can't get platform irq\n");
 \ /
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