openwrtv4/target/linux/brcm2708/patches-4.4/0424-BCM270X_DT-Declare-the-audio-PWM-pins-explicitly.patch
Álvaro Fernández Rojas 2b1c6b21b5 brcm2708: update linux 4.4 patches to latest version
As usual these patches were extracted and rebased from the raspberry pi repo:
https://github.com/raspberrypi/linux/tree/rpi-4.4.y

Also adds support for Raspberry Pi Compute Module 3 (untested).

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2016-09-10 14:54:26 +02:00

122 lines
2.5 KiB
Diff

From 4a1655a918b26f5d24d04b1bb798feb39982ac78 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Mon, 20 Jun 2016 13:21:26 +0100
Subject: [PATCH] BCM270X_DT: Declare the audio PWM pins explicitly
Make the audio driver's use of the PWM functions explicit. Overlays
that want to use the PWM functionality for other purposes must
disable the audio node.
See: https://github.com/raspberrypi/linux/issues/1473
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
arch/arm/boot/dts/bcm2708-rpi-b-plus.dts | 10 ++++++++++
arch/arm/boot/dts/bcm2708-rpi-b.dts | 9 +++++++++
arch/arm/boot/dts/bcm2709-rpi-2-b.dts | 10 ++++++++++
arch/arm/boot/dts/bcm2710-rpi-3-b.dts | 10 ++++++++++
4 files changed, 39 insertions(+)
--- a/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
+++ b/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
@@ -37,6 +37,11 @@
brcm,pins = <18 19 20 21>;
brcm,function = <4>; /* alt0 */
};
+
+ audio_pins: audio_pins {
+ brcm,pins = <40 45>;
+ brcm,function = <4>;
+ };
};
&sdhost {
@@ -120,6 +125,11 @@
hpd-gpios = <&gpio 46 GPIO_ACTIVE_LOW>;
};
+&audio {
+ pinctrl-names = "default";
+ pinctrl-0 = <&audio_pins>;
+};
+
/ {
__overrides__ {
uart0 = <&uart0>,"status";
--- a/arch/arm/boot/dts/bcm2708-rpi-b.dts
+++ b/arch/arm/boot/dts/bcm2708-rpi-b.dts
@@ -36,6 +36,10 @@
i2s_pins: i2s {
brcm,pins = <28 29 30 31>;
brcm,function = <6>; /* alt2 */
+
+ audio_pins: audio_pins {
+ brcm,pins = <40 45>;
+ brcm,function = <4>;
};
};
@@ -114,6 +118,11 @@
hpd-gpios = <&gpio 46 GPIO_ACTIVE_HIGH>;
};
+&audio {
+ pinctrl-names = "default";
+ pinctrl-0 = <&audio_pins>;
+};
+
/ {
__overrides__ {
uart0 = <&uart0>,"status";
--- a/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
+++ b/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
@@ -37,6 +37,11 @@
brcm,pins = <18 19 20 21>;
brcm,function = <4>; /* alt0 */
};
+
+ audio_pins: audio_pins {
+ brcm,pins = <40 45>;
+ brcm,function = <4>;
+ };
};
&sdhost {
@@ -120,6 +125,11 @@
hpd-gpios = <&gpio 46 GPIO_ACTIVE_LOW>;
};
+&audio {
+ pinctrl-names = "default";
+ pinctrl-0 = <&audio_pins>;
+};
+
/ {
__overrides__ {
uart0 = <&uart0>,"status";
--- a/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
+++ b/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
@@ -61,6 +61,11 @@
brcm,function;
brcm,pull;
};
+
+ audio_pins: audio_pins {
+ brcm,pins = <40 41>;
+ brcm,function = <4>;
+ };
};
&sdhost {
@@ -165,6 +170,11 @@
hpd-gpios = <&gpio 46 GPIO_ACTIVE_LOW>;
};
+&audio {
+ pinctrl-names = "default";
+ pinctrl-0 = <&audio_pins>;
+};
+
/ {
chosen {
bootargs = "8250.nr_uarts=1";