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authorÁlvaro Fernández Rojas <noltari@gmail.com>2019-07-31 18:23:26 +0200
committerÁlvaro Fernández Rojas <noltari@gmail.com>2019-08-02 18:51:32 +0200
commit19226502bf6393706defe7f049c587b32c9b4f33 (patch)
tree0bff89a72b7006051a6eec1ac3c0c9250490cf4f /target/linux/brcm2708/patches-4.19/950-0700-overlays-i2c-gpio-Fix-the-bus-parameter.patch
parent66458c49aa14ebc9ba2e4f9b6a323b8ff122807b (diff)
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brcm2708: update to latest patches from the RPi foundation
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0700-overlays-i2c-gpio-Fix-the-bus-parameter.patch')
-rw-r--r--target/linux/brcm2708/patches-4.19/950-0700-overlays-i2c-gpio-Fix-the-bus-parameter.patch35
1 files changed, 35 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0700-overlays-i2c-gpio-Fix-the-bus-parameter.patch b/target/linux/brcm2708/patches-4.19/950-0700-overlays-i2c-gpio-Fix-the-bus-parameter.patch
new file mode 100644
index 0000000000..81b9c71a52
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0700-overlays-i2c-gpio-Fix-the-bus-parameter.patch
@@ -0,0 +1,35 @@
+From 55672983dee952815d614651a92f76044785ca46 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Tue, 9 Jul 2019 10:32:40 +0100
+Subject: [PATCH 700/725] 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 */