From 677cf44f4620e11ff573257551c8231eceee1d4b Mon Sep 17 00:00:00 2001
From: Martin Ayotte <martinayotte@yahoo.ca>
Date: Wed, 5 Dec 2018 15:00:44 -0500
Subject: [PATCH] add overlays framework for rockchip

---
 .../general-rockchip-overlays.patch           | 97 +++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 patch/kernel/rockchip64-dev/general-rockchip-overlays.patch

diff --git a/patch/kernel/rockchip64-dev/general-rockchip-overlays.patch b/patch/kernel/rockchip64-dev/general-rockchip-overlays.patch
new file mode 100644
index 000000000000..3ffe178d9c19
--- /dev/null
+++ b/patch/kernel/rockchip64-dev/general-rockchip-overlays.patch
@@ -0,0 +1,97 @@
+diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
+index 6a33eff..60fc91a 100644
+--- a/arch/arm64/boot/dts/rockchip/Makefile
++++ b/arch/arm64/boot/dts/rockchip/Makefile
+@@ -17,3 +17,5 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-puma-haikou.dtb
+ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-sapphire.dtb
+ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-rockpro64.dtb
+ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-sapphire-excavator.dtb
++
++subdir-y       := $(dts-dirs) overlay
+diff --git a/arch/arm64/boot/dts/rockchip/overlay/Makefile b/arch/arm64/boot/dts/rockchip/overlay/Makefile
+index e69de29..576e190 100644
+--- /dev/null
++++ b/arch/arm64/boot/dts/rockchip/overlay/Makefile
+@@ -0,0 +1,16 @@
++# SPDX-License-Identifier: GPL-2.0
++dtbo-$(CONFIG_ARCH_ROCKCHIP) += \
++	rockchip-i2c8.dtbo
++
++scr-$(CONFIG_ARCH_ROCKCHIP) += \
++       rockchip-fixup.scr
++
++dtbotxt-$(CONFIG_ARCH_ROCKCHIP) += \
++       README.rockchip-overlays
++
++targets += $(dtbo-y) $(scr-y) $(dtbotxt-y)
++
++always         := $(dtbo-y) $(scr-y) $(dtbotxt-y)
++clean-files    := *.dtbo *.scr
++
++
+diff --git a/arch/arm64/boot/dts/rockchip/overlay/README.rockchip-overlays b/arch/arm64/boot/dts/rockchip/overlay/README.rockchip-overlays
+index e69de29..9512445 100644
+--- /dev/null
++++ b/arch/arm64/boot/dts/rockchip/overlay/README.rockchip-overlays
+@@ -0,0 +1,20 @@
++This document describes overlays provided in the kernel packages
++For generic Armbian overlays documentation please see
++https://docs.armbian.com/User-Guide_Allwinner_overlays/
++
++### Platform:
++
++rockchip (Rockchip)
++
++### Provided overlays:
++
++- i2c8
++
++### Overlay details:
++
++### i2c8
++
++Activates TWI/I2C bus 8
++
++I2C8 pins (SCL, SDA): GPIO1-C4, GPIO1-C5
++
+diff --git a/arch/arm64/boot/dts/rockchip/overlay/rockchip-fixup.scr-cmd b/arch/arm64/boot/dts/rockchip/overlay/rockchip-fixup.scr-cmd
+new file mode 100644
+index 0000000..d4c39e2
+--- /dev/null
++++ b/arch/arm64/boot/dts/rockchip/overlay/rockchip-fixup.scr-cmd
+@@ -0,0 +1,4 @@
++# overlays fixup script
++# implements (or rather substitutes) overlay arguments functionality
++# using u-boot scripting, environment variables and "fdt" command
++
+diff --git a/arch/arm64/boot/dts/rockchip/overlay/rockchip-i2c8.dts b/arch/arm64/boot/dts/rockchip/overlay/rockchip-i2c8.dts
+new file mode 100644
+index 0000000..54bc844
+--- /dev/null
++++ b/arch/arm64/boot/dts/rockchip/overlay/rockchip-i2c8.dts
+@@ -0,0 +1,11 @@
++/dts-v1/;
++
++/ {
++    compatible = "rockchip,rk3399";
++    fragment@0 {
++        target-path = "/i2c@ff3e0000";
++        __overlay__ {
++            status = "okay";
++        };
++    };
++};
+diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
+index 26e6af4..65b9435 100644
+--- a/scripts/Makefile.lib
++++ b/scripts/Makefile.lib
+@@ -65,6 +65,9 @@ real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)
+ extra-y				+= $(dtb-y)
+ extra-$(CONFIG_OF_ALL_DTBS)	+= $(dtb-)
+ 
++# Overlay targets
++extra-y				+= $(dtbo-y) $(scr-y) $(dtbotxt-y)
++
+ # Add subdir path
+ 
+ extra-y		:= $(addprefix $(obj)/,$(extra-y))