spi: dspi: clear SPI_SR before enable interrupt (5ee67b58) · Commits · 戴 / test

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 <yao.yuan@nxp.com> Signed-off-by:

Mark Brown <broonie@kernel.org>

drivers/spi/spi-fsl-dspi.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -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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