bcm27xx: import latest patches from the RPi foundation

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 182 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0661-ARM-dts-Create-bcm2708-rpi-b-rev1.dts.patch b/target/linux/bcm27xx/patches-5.4/950-0661-ARM-dts-Create-bcm2708-rpi-b-rev1.dts.patch
new file mode 100644
index 0000000000..42067a7816
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0661-ARM-dts-Create-bcm2708-rpi-b-rev1.dts.patch
@@ -0,0 +1,182 @@
+From bd291f0ff613ad270a7c9352f3f27a09c058553f Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.com>
+Date: Tue, 21 Apr 2020 17:34:27 +0100
+Subject: [PATCH] ARM: dts: Create bcm2708-rpi-b-rev1.dts
+
+The first revision of the Pi Model B used I2C0 to address the camera
+and I2C0 was available for user applications on the 26-pin header.
+The second revision switched the roles, kept I2C0 on the 26-pin header
+and added I2C1 on a new 8-way header (P5).
+
+Up to now, downstream DTS has used a single file for both revisions of
+the board, with a small amount of patching from the firmware. With the
+introduction of an I2C mux to share I2C0 between the camera/display
+connectors and the IDC headers, the difference between the two versions
+becomes too great to comfortably manage with tweaking, hence this split.
+
+Upstream DTS files already have bcm2835-rpi-b.dts and
+bcm2835-rpi-b-rev2.dts, but for backwards compatibility the new file is
+being added as bcm2708-rpi-b-rev1.dts, rather than renaming the old
+shared version to bcm2708-rpi-b-rev2.dts.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ arch/arm/boot/dts/Makefile               |   1 +
+ arch/arm/boot/dts/bcm2708-rpi-b-rev1.dts | 127 +++++++++++++++++++++++
+ arch/arm/boot/dts/bcm270x-rpi.dtsi       |   4 +
+ 3 files changed, 132 insertions(+)
+ create mode 100644 arch/arm/boot/dts/bcm2708-rpi-b-rev1.dts
+
+--- a/arch/arm/boot/dts/Makefile
++++ b/arch/arm/boot/dts/Makefile
+@@ -2,6 +2,7 @@
+ 
+ dtb-$(CONFIG_ARCH_BCM2835) += \
+ 	bcm2708-rpi-b.dtb \
++	bcm2708-rpi-b-rev1.dtb \
+ 	bcm2708-rpi-b-plus.dtb \
+ 	bcm2708-rpi-cm.dtb \
+ 	bcm2708-rpi-zero.dtb \
+--- /dev/null
++++ b/arch/arm/boot/dts/bcm2708-rpi-b-rev1.dts
+@@ -0,0 +1,127 @@
++/dts-v1/;
++
++#include "bcm2708.dtsi"
++#include "bcm2708-rpi.dtsi"
++#include "bcm283x-rpi-smsc9512.dtsi"
++#include "bcm283x-rpi-csi1-2lane.dtsi"
++
++/ {
++	compatible = "raspberrypi,model-b", "brcm,bcm2835";
++	model = "Raspberry Pi Model B";
++};
++
++&gpio {
++	spi0_pins: spi0_pins {
++		brcm,pins = <9 10 11>;
++		brcm,function = <4>; /* alt0 */
++	};
++
++	spi0_cs_pins: spi0_cs_pins {
++		brcm,pins = <8 7>;
++		brcm,function = <1>; /* output */
++	};
++
++	i2c0_pins: i2c0 {
++		brcm,pins = <0 1>;
++		brcm,function = <4>;
++	};
++
++	i2c1_pins: i2c1 {
++		brcm,pins = <2 3>;
++		brcm,function = <4>;
++	};
++
++	i2s_pins: i2s {
++		brcm,pins = <28 29 30 31>;
++		brcm,function = <6>; /* alt2 */
++	};
++
++	audio_pins: audio_pins {
++		brcm,pins = <40 45>;
++		brcm,function = <4>;
++	};
++};
++
++&uart0 {
++	status = "okay";
++};
++
++&spi0 {
++	pinctrl-names = "default";
++	pinctrl-0 = <&spi0_pins &spi0_cs_pins>;
++	cs-gpios = <&gpio 8 1>, <&gpio 7 1>;
++
++	spidev0: spidev@0{
++		compatible = "spidev";
++		reg = <0>;	/* CE0 */
++		#address-cells = <1>;
++		#size-cells = <0>;
++		spi-max-frequency = <125000000>;
++	};
++
++	spidev1: spidev@1{
++		compatible = "spidev";
++		reg = <1>;	/* CE1 */
++		#address-cells = <1>;
++		#size-cells = <0>;
++		spi-max-frequency = <125000000>;
++	};
++};
++
++/delete-node/ &i2c0mux;
++
++i2c0: &i2c0if {
++	pinctrl-names = "default";
++	pinctrl-0 = <&i2c0_pins>;
++	clock-frequency = <100000>;
++};
++
++i2c_csi_dsi: &i2c1 {
++	pinctrl-names = "default";
++	pinctrl-0 = <&i2c1_pins>;
++	clock-frequency = <100000>;
++};
++
++/ {
++	aliases {
++		i2c0 = &i2c0;
++	};
++
++	__overrides__ {
++		i2c0 = <&i2c0>, "status";
++	};
++};
++
++&i2c2 {
++	clock-frequency = <100000>;
++};
++
++&i2s {
++	pinctrl-names = "default";
++	pinctrl-0 = <&i2s_pins>;
++};
++
++&leds {
++	act_led: act {
++		label = "led0";
++		linux,default-trigger = "mmc0";
++		gpios = <&gpio 16 1>;
++	};
++};
++
++&hdmi {
++	hpd-gpios = <&gpio 46 GPIO_ACTIVE_HIGH>;
++};
++
++&audio {
++	pinctrl-names = "default";
++	pinctrl-0 = <&audio_pins>;
++};
++
++/ {
++	__overrides__ {
++		act_led_gpio = <&act_led>,"gpios:4";
++		act_led_activelow = <&act_led>,"gpios:8";
++		act_led_trigger = <&act_led>,"linux,default-trigger";
++	};
++};
+--- a/arch/arm/boot/dts/bcm270x-rpi.dtsi
++++ b/arch/arm/boot/dts/bcm270x-rpi.dtsi
+@@ -110,6 +110,10 @@
+ 	status = "disabled";
+ };
+ 
++&i2c0mux {
++	status = "disabled";
++};
++
+ &i2c1 {
+ 	status = "disabled";
+ };