brcm2708: add linux 4.19 support

Boot tested on Raspberry Pi B+ (BCM2708) and Raspberry Pi 2 (BCM2709)

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

1 files changed, 80 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.19/950-0642-overlays-Add-the-spi-gpio40-45-overlay.patch b/target/linux/brcm2708/patches-4.19/950-0642-overlays-Add-the-spi-gpio40-45-overlay.patch
new file mode 100644
index 0000000000..53508b2608
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0642-overlays-Add-the-spi-gpio40-45-overlay.patch
@@ -0,0 +1,80 @@
+From 14cd6256f49abbf230edc0c7a963f5e780255e98 Mon Sep 17 00:00:00 2001
+From: Tim Gover <tim.gover@raspberrypi.org>
+Date: Tue, 22 Jan 2019 10:49:41 +0000
+Subject: [PATCH 642/703] overlays: Add the spi-gpio40-45 overlay
+
+The 2711 B0 boot EEPROM is programmed via SPI0 on GPIO
+pins 40-43 CS0. Add a device tree overlay to optionally
+change the SPI0 pinmux from the external GPIO pins to
+the boot EEPROM pins.
+---
+ arch/arm/boot/dts/overlays/Makefile           |  1 +
+ arch/arm/boot/dts/overlays/README             |  6 ++++
+ .../dts/overlays/spi-gpio40-45-overlay.dts    | 36 +++++++++++++++++++
+ 3 files changed, 43 insertions(+)
+ create mode 100644 arch/arm/boot/dts/overlays/spi-gpio40-45-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -135,6 +135,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
+ 	smi-dev.dtbo \
+ 	smi-nand.dtbo \
+ 	spi-gpio35-39.dtbo \
++	spi-gpio40-45.dtbo \
+ 	spi-rtc.dtbo \
+ 	spi0-cs.dtbo \
+ 	spi0-hw-cs.dtbo \
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -1967,6 +1967,12 @@ Load:   dtoverlay=spi-gpio35-39
+ Params: <None>
+ 
+ 
++Name:   spi-gpio40-45
++Info:   Move SPI function block to GPIOs 40 to 45
++Load:   dtoverlay=spi-gpio40-45
++Params: <None>
++
++
+ Name:   spi-rtc
+ Info:   Adds support for a number of SPI Real Time Clock devices
+ Load:   dtoverlay=spi-rtc,<param>=<val>
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/spi-gpio40-45-overlay.dts
+@@ -0,0 +1,36 @@
++/*
++ * Boot EEPROM overlay
++ */
++
++/dts-v1/;
++/plugin/;
++
++/ {
++	compatible = "brcm,bcm2835";
++
++	fragment@0 {
++		target = <&spi0>;
++		__overlay__ {
++			cs-gpios = <&gpio 43 1>, <&gpio 44 1>, <&gpio 45 1>;
++			status = "okay";
++		};
++	};
++
++	fragment@1 {
++		target = <&spi0_cs_pins>;
++		__overlay__ {
++			brcm,pins = <45 44 43>;
++			brcm,function = <1>; /* output */
++			status = "okay";
++		};
++	};
++
++	fragment@2 {
++		target = <&spi0_pins>;
++		__overlay__ {
++			brcm,pins = <40 41 42>;
++			brcm,function = <3>; /* alt4 */
++			status = "okay";
++		};
++	};
++};