brcm2708: update to latest patches from RPi Foundation

[openwrt/staging/dedeckeh.git] / target / linux / brcm2708 / patches-4.19 / 950-0445-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0445-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch b/target/linux/brcm2708/patches-4.19/950-0445-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch
new file mode 100644 (file)
index 0000000..6229fdc
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0445-w1-w1-gpio-Make-GPIO-an-output-for-strong-pullup.patch
@@ -0,0 +1,27 @@
+From afea1f84cbda94c47ba4a8f84d16c4330e145a0a Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Wed, 12 Jun 2019 17:15:05 +0100
+Subject: [PATCH] w1: w1-gpio: Make GPIO an output for strong pullup
+
+The logic to drive the data line high to implement a strong pullup
+assumed that the pin was already an output - setting a value does
+not change an input.
+
+See: https://github.com/raspberrypi/firmware/issues/1143
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ drivers/w1/masters/w1-gpio.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/w1/masters/w1-gpio.c
++++ b/drivers/w1/masters/w1-gpio.c
+@@ -33,7 +33,7 @@ static u8 w1_gpio_set_pullup(void *data,
+                        * This will OVERRIDE open drain emulation and force-pull
+                        * the line high for some time.
+                        */
+-                      gpiod_set_raw_value(pdata->gpiod, 1);
++                      gpiod_direction_output_raw(pdata->gpiod, 1);
+                       msleep(pdata->pullup_duration);
+                       /*
+                        * This will simply set the line as input since we are doing