rockchip 添加设备树插件功能

.gitignore

@@ -137,4 +137,5 @@ defconfig
 
 # Kdevelop4
 *.kdev4
-
+*.dtb*
+*.scr

arch/arm64/boot/dts/rockchip/Makefile

@@ -113,3 +113,5 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-nvr-demo-v12-linux.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-nvr-demo-v12-linux-spi-nand.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-lubancat2.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-lubancat2-io.dtb
+
+subdir-y	:= $(dts-dirs) overlay

arch/arm64/boot/dts/rockchip/overlay/Makefile

@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: GPL-2.0
+dtbo-$(CONFIG_ARCH_ROCKCHIP) += \
+	lubancat2-uart3-overlay.dtbo
+
+scr-$(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
+

arch/arm64/boot/dts/rockchip/overlay/README.rockchip-overlays

@@ -0,0 +1,13 @@
+## Introduction
+
+## Platform and Chips:
+
+rockchip (Rockchip)
+- rk3566
+- rk3568
+
+## usage
+
+Kernel provided DT overlay files are in
+  /boot/dtbs/$(uname -r)/rockchip/overlay/
+

arch/arm64/boot/dts/rockchip/overlay/lubancat2-uart3-overlay.dts

@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2022 - All Rights Reserved by
+ * filename : lubancat2-uart-overlay.dts
+ * brief : Device Tree overlay for ebf lubancat2 uart device
+ * author : embedfire
+ * date : 2022-05-31
+ * version : A001
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/pinctrl/rockchip.h>
+#include <dt-bindings/clock/rk3568-cru.h>
+
+
+/ {
+	fragment@0 {
+		target = <&uart3>;
+
+		__overlay__ {
+			status = "okay";
+		};
+	};
+};
+

arch/arm64/boot/dts/rockchip/overlay/rockchip-fixup.scr-cmd

@@ -0,0 +1,30 @@
+# overlays fixup script
+# implements (or rather substitutes) overlay arguments functionality
+# using u-boot scripting, environment variables and "fdt" command
+
+setenv decompose_pin 'setexpr tmp_pinctrl sub "GPIO(0|1|2|3|4)_\\S\\d+" "\\1";
+setexpr tmp_bank sub "GPIO\\d_(\\S)\\d+" "\\1";
+test "${tmp_bank}" = "A" && setenv tmp_bank 0;
+test "${tmp_bank}" = "B" && setenv tmp_bank 1;
+test "${tmp_bank}" = "C" && setenv tmp_bank 2;
+test "${tmp_bank}" = "D" && setenv tmp_bank 3;
+setexpr tmp_pin sub "GPIO\\d_\\S(\\d+)" "\\1";
+setexpr tmp_bank ${tmp_bank} * 8;
+setexpr tmp_pin ${tmp_bank} + ${tmp_pin}'
+
+if test -n "${param_w1_pin}"; then
+	setenv tmp_pinctrl "${param_w1_pin}"
+	setenv tmp_bank "${param_w1_pin}"
+	setenv tmp_pin "${param_w1_pin}"
+	run decompose_pin
+	echo "${param_w1_pin} ---> pinctrl = ${tmp_pinctrl}"
+	echo "${param_w1_pin} ---> bank = ${tmp_bank}"
+	echo "${param_w1_pin} ---> pin = ${tmp_pin}"
+	fdt get value tmp_pinctrl /__symbols__	gpio${tmp_pinctrl}
+	echo "${param_w1_pin} ---> tmp_pinctrl = ${tmp_pinctrl}"
+	fdt get value tmp_phandle ${tmp_pinctrl} phandle
+	echo "${param_w1_pin} ---> tmp_phandle = ${tmp_phandle}"
+	fdt set /onewire@0 gpios "<${tmp_phandle} ${tmp_pin} 0 0>"
+	env delete tmp_pinctrl tmp_bank tmp_pin tmp_phandle
+fi
+

arch/arm64/configs/lubancat2_defconfig

@@ -126,6 +126,7 @@ CONFIG_MTD=y
 CONFIG_MTD_CMDLINE_PARTS=y
 CONFIG_MTD_BLOCK=y
 CONFIG_MTD_UBI=y
+CONFIG_OF_OVERLAY=y
 CONFIG_ZRAM=y
 CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_RAM=y

scripts/Makefile.dtbinst

@@ -20,6 +20,9 @@ include scripts/Kbuild.include
 include $(src)/Makefile
 
 dtbinst-files	:= $(sort $(dtb-y) $(if $(CONFIG_OF_ALL_DTBS), $(dtb-)))
+dtboinst-files	:= $(dtbo-y)
+script-files	:= $(scr-y)
+readme-files	:= $(dtbotxt-y)
 dtbinst-dirs	:= $(subdir-y) $(subdir-m)
 
 # Helper targets for Installing DTBs into the boot directory
@@ -31,10 +34,19 @@ install-dir = $(patsubst $(dtbinst_root)%,$(INSTALL_DTBS_PATH)%,$(obj))
 $(dtbinst-files): %.dtb: $(obj)/%.dtb
 	$(call cmd,dtb_install,$(install-dir))
 
+$(dtboinst-files): %.dtbo: $(obj)/%.dtbo
+	$(call cmd,dtb_install,$(install-dir))
+
+$(script-files): %.scr: $(obj)/%.scr
+	$(call cmd,dtb_install,$(install-dir))
+
+$(readme-files): %: $(src)/%
+	$(call cmd,dtb_install,$(install-dir))
+
 $(dtbinst-dirs):
 	$(Q)$(MAKE) $(dtbinst)=$(obj)/$@
 
-PHONY += $(dtbinst-files) $(dtbinst-dirs)
-__dtbs_install: $(dtbinst-files) $(dtbinst-dirs)
+PHONY += $(dtbinst-files) $(dtboinst-files) $(script-files) $(readme-files) $(dtbinst-dirs)
+__dtbs_install: $(dtbinst-files) $(dtboinst-files) $(script-files) $(readme-files) $(dtbinst-dirs)
 
 .PHONY: $(PHONY)

scripts/Makefile.lib

@@ -61,6 +61,9 @@ real-obj-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))
@@ -277,6 +280,9 @@ endif
 
 DTC_FLAGS += $(DTC_FLAGS_$(basetarget))
 
+# Overlay support
+DTC_FLAGS += -@ -Wno-unit_address_format -Wno-simple_bus_reg
+
 # Generate an assembly file to wrap the output of the device tree compiler
 quiet_cmd_dt_S_dtb= DTB     $@
 cmd_dt_S_dtb=						\
@@ -306,6 +312,23 @@ cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
 $(obj)/%.dtb: $(src)/%.dts $(DTC) FORCE
 	$(call if_changed_dep,dtc)
 
+quiet_cmd_dtco = DTCO    $@
+cmd_dtco = mkdir -p $(dir ${dtc-tmp}) ; \
+	$(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
+	$(DTC) -@ -O dtb -o $@ -b 0 \
+		-i $(dir $<) $(DTC_FLAGS) \
+		-d $(depfile).dtc.tmp $(dtc-tmp) ; \
+	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
+
+$(obj)/%.dtbo: $(src)/%.dts FORCE
+	$(call if_changed_dep,dtco)
+
+quiet_cmd_scr = MKIMAGE $@
+cmd_scr = mkimage -C none -A $(ARCH) -T script -d $< $@
+
+$(obj)/%.scr: $(src)/%.scr-cmd FORCE
+	$(call if_changed,scr)
+
 dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
 
 # Bzip2