118 lines
3.6 KiB
Diff
118 lines
3.6 KiB
Diff
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From 8319cfe761a6b045e142d8a2052220d16aff5379 Mon Sep 17 00:00:00 2001
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From: stephen <stephen@vamrs.com>
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Date: Fri, 22 Feb 2019 19:07:26 +0800
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Subject: [PATCH 34/97] add device tree overlay for rockpi
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Here uses the at24c02 module as a test sample.
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Signed-off-by: stephen <stephen@vamrs.com>
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---
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arch/arm64/boot/dts/.gitignore | 1 +
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arch/arm64/boot/dts/rockchip/Makefile | 13 +++++++++++-
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.../arm64/boot/dts/rockchip/overlays/Makefile | 10 +++++++++
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.../dts/rockchip/overlays/at24c02-overlay.dts | 21 +++++++++++++++++++
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arch/arm64/configs/rockchip_linux_defconfig | 1 +
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scripts/Makefile.lib | 11 ++++++++++
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6 files changed, 56 insertions(+), 1 deletion(-)
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create mode 100644 arch/arm64/boot/dts/rockchip/overlays/Makefile
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create mode 100644 arch/arm64/boot/dts/rockchip/overlays/at24c02-overlay.dts
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diff --git a/arch/arm64/boot/dts/.gitignore b/arch/arm64/boot/dts/.gitignore
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index b60ed208c779..77ed402cbbc8 100644
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--- a/arch/arm64/boot/dts/.gitignore
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+++ b/arch/arm64/boot/dts/.gitignore
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@@ -1 +1,2 @@
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*.dtb
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+*.dtbo
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diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
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index cb02dda8e20e..9aa944b743e2 100644
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--- a/arch/arm64/boot/dts/rockchip/Makefile
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+++ b/arch/arm64/boot/dts/rockchip/Makefile
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@@ -84,6 +84,17 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rock960-model-ab-linux.dtb
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dtb-$(CONFIG_ARCH_ROCKCHIP) += rock960-model-c-linux.dtb
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dtb-$(CONFIG_ARCH_ROCKCHIP) += rockpi-4b-linux.dtb
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+targets += dtbs dtbs_instal
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+targets += $(dtb-y)
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+dtstree := $(srctree)/$(src)
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+dtb-$(CONFIG_OF_ALL_DTBS) := $(patsubst $(dtstree)/%.dts,%.dtb, $(wildcard $(dtstree)/*.dts))
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+
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always := $(dtb-y)
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-subdir-y := $(dts-dirs)
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+subdir-y := $(dts-dirs) overlays
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clean-files := *.dtb
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+
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+# Enable fixups to support overlays on ROCK Pi platforms
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+ifeq ($(CONFIG_ARCH_ROCKCHIP),y)
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+ DTC_FLAGS ?= -@ -H epapr
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+ dts-dirs += overlays
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+endif
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diff --git a/arch/arm64/boot/dts/rockchip/overlays/Makefile b/arch/arm64/boot/dts/rockchip/overlays/Makefile
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new file mode 100644
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index 000000000000..b4ded11e7a8f
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--- /dev/null
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+++ b/arch/arm64/boot/dts/rockchip/overlays/Makefile
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@@ -0,0 +1,10 @@
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+# Overlays for the ROCK Pi platform
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+
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+dtbo-$(CONFIG_ARCH_ROCKCHIP) += \
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+ at24c02.dtbo
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+
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+targets += dtbs dtbs_install
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+targets += $(dtbo-y)
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+
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+always := $(dtbo-y)
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+clean-files := *.dtbo
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diff --git a/arch/arm64/boot/dts/rockchip/overlays/at24c02-overlay.dts b/arch/arm64/boot/dts/rockchip/overlays/at24c02-overlay.dts
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new file mode 100644
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index 000000000000..535753163ff0
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--- /dev/null
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+++ b/arch/arm64/boot/dts/rockchip/overlays/at24c02-overlay.dts
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@@ -0,0 +1,21 @@
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+/dts-v1/;
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+/plugin/;
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+
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+/ {
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+ model = "ROCK PI 4B";
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+ compatible = "rockchip,rockpi","rockchip,rk3399";
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+
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+ fragment@0 {
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+ target = <&i2c2>;
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+
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+ __overlay__ {
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+
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+ at24c02@50 {
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+ status = "okay";
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+ compatible = "atmel,24c02";
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+ reg = <0x50>;
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+ pagesize = <8>;
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+ };
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+ };
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+ };
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+};
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diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
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index 3fb2aaa00411..75aa16f7baa9 100644
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--- a/scripts/Makefile.lib
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+++ b/scripts/Makefile.lib
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@@ -319,6 +319,17 @@ cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
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$(obj)/%.dtb: $(src)/%.dts FORCE
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$(call if_changed_dep,dtc)
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+quiet_cmd_dtco = DTCO $@
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+cmd_dtco = mkdir -p $(dir ${dtc-tmp}) ; \
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+ $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
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+ $(DTC) -@ -H epapr -O dtb -o $@ -b 0 \
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+ -i $(dir $<) $(DTC_FLAGS) \
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+ -d $(depfile).dtc.tmp $(dtc-tmp) ; \
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+ cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
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+
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+$(obj)/%.dtbo: $(src)/%-overlay.dts FORCE
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+ $(call if_changed_dep,dtco)
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+
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dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
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# cat
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--
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2.25.1
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