brcm2708: update to latest patches from RPi Foundation

[openwrt/staging/chunkeey.git] / target / linux / brcm2708 / patches-4.19 / 950-0011-spi-bcm2835-Disable-forced-software-CS.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0011-spi-bcm2835-Disable-forced-software-CS.patch b/target/linux/brcm2708/patches-4.19/950-0011-spi-bcm2835-Disable-forced-software-CS.patch
new file mode 100644 (file)
index 0000000..30a65ff
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0011-spi-bcm2835-Disable-forced-software-CS.patch
@@ -0,0 +1,34 @@
+From 2610aceda837370048f86b4af27852463c3b5a47 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Fri, 1 Jul 2016 22:09:24 +0100
+Subject: [PATCH] spi-bcm2835: Disable forced software CS
+
+Select software CS in bcm2708_common.dtsi, and disable the automatic
+conversion in the driver to allow hardware CS to be re-enabled with an
+overlay.
+
+See: https://github.com/raspberrypi/linux/issues/1547
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ drivers/spi/spi-bcm2835.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/drivers/spi/spi-bcm2835.c
++++ b/drivers/spi/spi-bcm2835.c
+@@ -706,6 +706,7 @@ static int bcm2835_spi_setup(struct spi_
+               return -EINVAL;
+       }
+ 
++#if 0
+       /* now translate native cs to GPIO */
+       /* first look for chip select pins in the devices pin groups */
+       for (pingroup_index = 0;
+@@ -755,6 +756,7 @@ static int bcm2835_spi_setup(struct spi_
+                       spi->chip_select, spi->cs_gpio, err);
+               return err;
+       }
++#endif
+ 
+       return 0;
+ }