diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0703-overlays-gpio-keys-Avoid-open-drain-warnings.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0703-overlays-gpio-keys-Avoid-open-drain-warnings.patch | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0703-overlays-gpio-keys-Avoid-open-drain-warnings.patch b/target/linux/bcm27xx/patches-5.4/950-0703-overlays-gpio-keys-Avoid-open-drain-warnings.patch new file mode 100644 index 0000000000..579b3b61b6 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0703-overlays-gpio-keys-Avoid-open-drain-warnings.patch @@ -0,0 +1,29 @@ +From ae10c15867d9a5b85eefaf11333bd30473af4b2b Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.com> +Date: Sat, 2 May 2020 13:43:06 +0100 +Subject: [PATCH] overlays: gpio-keys: Avoid open-drain warnings + +The i2c-gpio driver expects to use a GPIO in open-drain mode. Failure +to configure it in that way causes alarming warnings in the kernel log. +The BCM283x and BCM2711 GPIO blocks don't support open-drain mode, +but i2c-gpio works anyway. Silence the warning by declaring that +open-drain mode has been enabled by other means. + +See: https://github.com/raspberrypi/firmware/issues/1381 + +Signed-off-by: Phil Elwell <phil@raspberrypi.com> +--- + arch/arm/boot/dts/overlays/i2c-gpio-overlay.dts | 2 ++ + 1 file changed, 2 insertions(+) + +--- a/arch/arm/boot/dts/overlays/i2c-gpio-overlay.dts ++++ b/arch/arm/boot/dts/overlays/i2c-gpio-overlay.dts +@@ -16,6 +16,8 @@ + &gpio 24 0 /* scl */ + >; + i2c-gpio,delay-us = <2>; /* ~100 kHz */ ++ i2c-gpio,sda-open-drain; ++ i2c-gpio,scl-open-drain; + #address-cells = <1>; + #size-cells = <0>; + }; |