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Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0477-spi-bcm2835-enable-shared-interrupt-support.patch')
-rw-r--r--target/linux/brcm2708/patches-4.19/950-0477-spi-bcm2835-enable-shared-interrupt-support.patch35
1 files changed, 35 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0477-spi-bcm2835-enable-shared-interrupt-support.patch b/target/linux/brcm2708/patches-4.19/950-0477-spi-bcm2835-enable-shared-interrupt-support.patch
new file mode 100644
index 0000000000..f929b3a969
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0477-spi-bcm2835-enable-shared-interrupt-support.patch
@@ -0,0 +1,35 @@
+From 21dd7cd6dc231287b92a8c8b9ecf9d0844c2d325 Mon Sep 17 00:00:00 2001
+From: Martin Sperl <kernel@martin.sperl.org>
+Date: Mon, 13 May 2019 11:05:27 +0000
+Subject: [PATCH] spi: bcm2835: enable shared interrupt support
+
+Add shared interrupt support for this driver.
+
+Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
+---
+ drivers/spi/spi-bcm2835.c | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+--- a/drivers/spi/spi-bcm2835.c
++++ b/drivers/spi/spi-bcm2835.c
+@@ -150,6 +150,10 @@ static irqreturn_t bcm2835_spi_interrupt
+ struct spi_master *master = dev_id;
+ struct bcm2835_spi *bs = spi_master_get_devdata(master);
+
++ /* check if we got interrupt enabled */
++ if (!(bcm2835_rd(bs, BCM2835_SPI_CS) & BCM2835_SPI_CS_INTR))
++ return IRQ_NONE;
++
+ /* Read as many bytes as possible from FIFO */
+ bcm2835_rd_fifo(bs);
+ /* Write as many bytes as possible to FIFO */
+@@ -756,7 +760,8 @@ static int bcm2835_spi_probe(struct plat
+ bcm2835_wr(bs, BCM2835_SPI_CS,
+ BCM2835_SPI_CS_CLEAR_RX | BCM2835_SPI_CS_CLEAR_TX);
+
+- err = devm_request_irq(&pdev->dev, bs->irq, bcm2835_spi_interrupt, 0,
++ err = devm_request_irq(&pdev->dev, bs->irq, bcm2835_spi_interrupt,
++ IRQF_SHARED,
+ dev_name(&pdev->dev), master);
+ if (err) {
+ dev_err(&pdev->dev, "could not request IRQ: %d\n", err);