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add overlays framework for rockchip

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This commit is contained in:
Martin Ayotte 2018-12-05 15:00:44 -05:00
parent 9324bde9b9
commit 677cf44f46
1 changed files with 97 additions and 0 deletions
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97
patch/kernel/rockchip64-dev/general-rockchip-overlays.patch Normal file
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@ -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))