brcm2708: update to latest patches from RPi Foundation

[openwrt/staging/chunkeey.git] / target / linux / brcm2708 / patches-4.19 / 950-0479-spi-bcm2835-enable-shared-interrupt-support.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0479-spi-bcm2835-enable-shared-interrupt-support.patch b/target/linux/brcm2708/patches-4.19/950-0479-spi-bcm2835-enable-shared-interrupt-support.patch
new file mode 100644 (file)
index 0000000..f929b3a
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0479-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);