realtek: backport upstream platform

Backport the patch that introduced the MACH_REALTEK_RTL platform in
5.12, which is based on MIPS_GENERIC. This will allow some custom
platform code to be dropped from the realtek target.

Co-developed-by: INAGAKI Hiroshi <musashino.open@gmail.com>
Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
Signed-off-by: Sander Vanheule <sander@svanheule.net>
Tested-by: Bjørn Mork <bjorn@mork.no>

diff --git a/target/linux/realtek/patches-5.10/009-5.12-MIPS-add-realtek-rtl838x-rtl839x-support.patch b/target/linux/realtek/patches-5.10/009-5.12-MIPS-add-realtek-rtl838x-rtl839x-support.patch
new file mode 100644 (file)
index 0000000..f343251
--- /dev/null
+++ b/target/linux/realtek/patches-5.10/009-5.12-MIPS-add-realtek-rtl838x-rtl839x-support.patch
@@ -0,0 +1,45 @@
+From 4042147a0cc6af5a400b5e12a7855e893dec01b4 Mon Sep 17 00:00:00 2001
+From: Bert Vermeulen <bert@biot.com>
+Date: Tue, 19 Jan 2021 10:21:07 +0100
+Subject: [PATCH] MIPS: Add Realtek RTL838x/RTL839x support as generic MIPS
+ system
+
+This is just enough system to boot the kernel with earlycon working.
+
+Signed-off-by: Bert Vermeulen <bert@biot.com>
+Signed-off-by: Sander Vanheule <sander@svanheule.net>
+Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
+---
+ arch/mips/Kconfig | 21 +++++++++++++++++++++
+ 1 file changed, 21 insertions(+)
+
+--- a/arch/mips/Kconfig
++++ b/arch/mips/Kconfig
+@@ -632,6 +632,27 @@ config RALINK
+       select ARCH_HAS_RESET_CONTROLLER
+       select RESET_CONTROLLER
+ 
++config MACH_REALTEK_RTL
++      bool "Realtek RTL838x/RTL839x based machines"
++      select MIPS_GENERIC
++      select DMA_NONCOHERENT
++      select IRQ_MIPS_CPU
++      select CSRC_R4K
++      select CEVT_R4K
++      select SYS_HAS_CPU_MIPS32_R1
++      select SYS_HAS_CPU_MIPS32_R2
++      select SYS_SUPPORTS_BIG_ENDIAN
++      select SYS_SUPPORTS_32BIT_KERNEL
++      select SYS_SUPPORTS_MIPS16
++      select SYS_SUPPORTS_MULTITHREADING
++      select SYS_SUPPORTS_VPE_LOADER
++      select SYS_HAS_EARLY_PRINTK
++      select SYS_HAS_EARLY_PRINTK_8250
++      select USE_GENERIC_EARLY_PRINTK_8250
++      select BOOT_RAW
++      select PINCTRL
++      select USE_OF
++
+ config SGI_IP22
+       bool "SGI IP22 (Indy/Indigo2)"
+       select ARC_MEMORY