feat: linux: rk2312: init

Signed-off-by: ZHANG Yuntian <[email protected]>

linux/rk2312/0001-Disable-warnings.patch

@@ -0,0 +1,28 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: ZHANG Yuntian <[email protected]>
+Date: Mon, 4 Mar 2024 17:00:58 +0800
+Subject: [PATCH] Disable warnings
+
+---
+ Makefile | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/Makefile b/Makefile
+index 69cdd0d2946c3..585cba7482248 100644
+--- a/Makefile
++++ b/Makefile
+@@ -1083,6 +1088,11 @@ KBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
+ # change __FILE__ to the relative path from the srctree
+ KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
+
++# Disable warnings in Rockchip drivers
++KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
++KBUILD_CFLAGS += $(call cc-disable-warning, incompatible-pointer-types)
++KBUILD_CFLAGS += $(call cc-disable-warning, return-type)
++
+ # include additional Makefiles when needed
+ include-y			:= scripts/Makefile.extrawarn
+ include-$(CONFIG_DEBUG_INFO)	+= scripts/Makefile.debug
+-- 
+2.44.0
+

linux/rk2312/0001-common

@@ -0,0 +1 @@
+../.common/

linux/rk2312/0002-rockchip

@@ -0,0 +1 @@
+../.rockchip

linux/rk2312/fork.conf

@@ -0,0 +1,7 @@
+BSP_GIT="https://github.com/radxa/kernel.git"
+BSP_BRANCH="linux-6.1-stan-rkr1"
+BSP_DEFCONFIG="rockchip_linux_defconfig"
+SUPPORTED_BOARDS=(
+    "rk2312"
+    #"rock-5b"
+)

linux/rk2312/kconfig.conf

@@ -0,0 +1,17 @@
+# Disable outdated pwm-gpio driver
+# Could be replaced with:
+# https://patchwork.ozlabs.org/project/linux-gpio/list/?series=393553
+# CONFIG_PWM_GPIO is not set
+
+# enum dw_pcie_as_type is declared in pcie-dw-rockchip.c,
+# but not in pcie-dw-ep-rockchip.c
+# CONFIG_PCIE_DW_ROCKCHIP_EP is not set
+
+# RK3399's midgard driver is not updated yet
+# CONFIG_MALI_MIDGARD is not set
+
+# RK3588 uses Valhall so disable this outdated driver as well
+# CONFIG_MALI400 is not set
+
+# cpufreq_interactive uses unexported functions
+CONFIG_CPU_FREQ_GOV_INTERACTIVE=y