011f2c26f1
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
100 lines
2.9 KiB
Diff
100 lines
2.9 KiB
Diff
From c3b4c2b0432a51abe5836dd8a90fd25c1e08f2ad Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.org>
|
|
Date: Fri, 6 May 2016 12:53:16 +0100
|
|
Subject: [PATCH] BCM270X_DT: i2c0-bcm2708 - pin group params
|
|
|
|
Add parameters to set pin groups as a unit, setting the pin function
|
|
appropriately. The parameters are:
|
|
pins_0_1
|
|
pins_28_29
|
|
pins_44_45
|
|
pins_46_47
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
|
|
---
|
|
arch/arm/boot/dts/overlays/README | 11 ++++--
|
|
.../arm/boot/dts/overlays/i2c0-bcm2708-overlay.dts | 43 +++++++++++++++++-----
|
|
2 files changed, 42 insertions(+), 12 deletions(-)
|
|
|
|
--- a/arch/arm/boot/dts/overlays/README
|
|
+++ b/arch/arm/boot/dts/overlays/README
|
|
@@ -449,10 +449,15 @@ Params: ds1307 Select t
|
|
|
|
|
|
Name: i2c0-bcm2708
|
|
-Info: Enable the i2c_bcm2708 driver for the i2c0 bus
|
|
+Info: Enable the i2c_bcm2708 driver for the i2c0 bus. Not all pin combinations
|
|
+ are usable on all platforms.
|
|
Load: dtoverlay=i2c0-bcm2708,<param>=<val>
|
|
-Params: sda0_pin GPIO pin for SDA0 (0, 28 [or 44] - default 0)
|
|
- scl0_pin GPIO pin for SCL0 (1, 29 [or 45] - default 1)
|
|
+Params: sda0_pin GPIO pin for SDA0 (deprecated - use pins_*)
|
|
+ scl0_pin GPIO pin for SCL0 (deprecated - use pins_*)
|
|
+ pins_0_1 Use pins 0 and 1 (default)
|
|
+ pins_28_29 Use pins 28 and 29
|
|
+ pins_44_45 Use pins 44 and 45
|
|
+ pins_46_47 Use pins 46 and 47
|
|
|
|
|
|
Name: i2c1-bcm2708
|
|
--- a/arch/arm/boot/dts/overlays/i2c0-bcm2708-overlay.dts
|
|
+++ b/arch/arm/boot/dts/overlays/i2c0-bcm2708-overlay.dts
|
|
@@ -14,23 +14,48 @@
|
|
fragment@0 {
|
|
target = <&i2c0>;
|
|
__overlay__ {
|
|
- pinctrl-0 = <&i2c0_pins>;
|
|
status = "okay";
|
|
};
|
|
};
|
|
|
|
fragment@1 {
|
|
- target = <&gpio>;
|
|
- __overlay__ {
|
|
- i2c0_pins: i2c0 {
|
|
- brcm,pins = <0 1>;
|
|
- brcm,function = <4>; /* alt0 */
|
|
- };
|
|
+ target = <&i2c0_pins>;
|
|
+ frag1: __overlay__ {
|
|
+ brcm,pins = <0 1>;
|
|
+ brcm,function = <4>; /* alt0 */
|
|
+ };
|
|
+ };
|
|
+
|
|
+ fragment@2 {
|
|
+ target = <&i2c0_pins>;
|
|
+ __dormant__ {
|
|
+ brcm,pins = <28 29>;
|
|
+ brcm,function = <4>; /* alt0 */
|
|
+ };
|
|
+ };
|
|
+
|
|
+ fragment@3 {
|
|
+ target = <&i2c0_pins>;
|
|
+ __dormant__ {
|
|
+ brcm,pins = <44 45>;
|
|
+ brcm,function = <5>; /* alt1 */
|
|
+ };
|
|
+ };
|
|
+
|
|
+ fragment@4 {
|
|
+ target = <&i2c0_pins>;
|
|
+ __dormant__ {
|
|
+ brcm,pins = <46 47>;
|
|
+ brcm,function = <4>; /* alt0 */
|
|
};
|
|
};
|
|
|
|
__overrides__ {
|
|
- sda0_pin = <&i2c0_pins>,"brcm,pins:0";
|
|
- scl0_pin = <&i2c0_pins>,"brcm,pins:4";
|
|
+ sda0_pin = <&frag1>,"brcm,pins:0";
|
|
+ scl0_pin = <&frag1>,"brcm,pins:4";
|
|
+ pins_0_1 = <0>,"+1-2-3-4";
|
|
+ pins_28_29 = <0>,"-1+2-3-4";
|
|
+ pins_44_45 = <0>,"-1-2+3-4";
|
|
+ pins_46_47 = <0>,"-1-2-3+4";
|
|
};
|
|
};
|