diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0609-overlays-i2c-gpio-Fix-the-bus-parameter.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0609-overlays-i2c-gpio-Fix-the-bus-parameter.patch | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0609-overlays-i2c-gpio-Fix-the-bus-parameter.patch b/target/linux/brcm2708/patches-4.19/950-0609-overlays-i2c-gpio-Fix-the-bus-parameter.patch new file mode 100644 index 0000000000..9a6d15506e --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0609-overlays-i2c-gpio-Fix-the-bus-parameter.patch @@ -0,0 +1,35 @@ +From d562b2187263b40aacc1a50d3f25db2cf28696d6 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Tue, 9 Jul 2019 10:32:40 +0100 +Subject: [PATCH] overlays: i2c-gpio: Fix the "bus" parameter + +The "bus" parameter has two functions - providing unique names for +multiple instances of the overlay, and allowing the number of the bus +(i.e. "i2c-<bus>") to be specified. The second function hasn't worked +as intended because the overlay doesn't include a "reg" property and +the firmware intentionally won't create a "reg" property if one doesn't +already exist. + +Allow the bus numbering scheme to work as intended by providing a "reg" +with a default value that means "the next available one". + +See: https://github.com/raspberrypi/linux/issues/3062 + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> +--- + 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 +@@ -7,8 +7,10 @@ + + fragment@0 { + target-path = "/"; ++ + __overlay__ { + i2c_gpio: i2c@0 { ++ reg = <0xffffffff>; + compatible = "i2c-gpio"; + gpios = <&gpio 23 0 /* sda */ + &gpio 24 0 /* scl */ |