brcm63xx: add linux 4.19 support

Boot tested on Comtrend AR-5387un:
https://gist.github.com/Noltari/57e5030455da8dc38e61f8c3a5922254

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
[jonas.gorski: make 4.19 an optional testing version; add gcc 8.3 fix]
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/target/linux/brcm63xx/patches-4.19/337-MIPS-BCM63XX-widen-cpuid-field.patch b/target/linux/brcm63xx/patches-4.19/337-MIPS-BCM63XX-widen-cpuid-field.patch
new file mode 100644
index 0000000000..c38b431125
--- /dev/null
+++ b/target/linux/brcm63xx/patches-4.19/337-MIPS-BCM63XX-widen-cpuid-field.patch
@@ -0,0 +1,56 @@
+From f1477f6e3551fd6beecfee5368fed1325dcd421f Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jogo@openwrt.org>
+Date: Sat, 7 Dec 2013 14:54:51 +0100
+Subject: [PATCH 47/53] MIPS: BCM63XX: widen cpuid field
+
+---
+ arch/mips/bcm63xx/cpu.c                          | 2 +-
+ arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h | 8 ++++----
+ 2 files changed, 5 insertions(+), 5 deletions(-)
+
+--- a/arch/mips/bcm63xx/cpu.c
++++ b/arch/mips/bcm63xx/cpu.c
+@@ -24,7 +24,7 @@ EXPORT_SYMBOL(bcm63xx_regs_base);
+ const int *bcm63xx_irqs;
+ EXPORT_SYMBOL(bcm63xx_irqs);
+ 
+-u16 bcm63xx_cpu_id __read_mostly;
++u32 bcm63xx_cpu_id __read_mostly;
+ EXPORT_SYMBOL(bcm63xx_cpu_id);
+ 
+ static u32 bcm63xx_cpu_variant __read_mostly;
+@@ -127,7 +127,7 @@ unsigned int bcm63xx_get_memory_size(voi
+ 
+ static unsigned int detect_cpu_clock(void)
+ {
+-	u16 cpu_id = bcm63xx_get_cpu_id();
++	u32 cpu_id = bcm63xx_get_cpu_id();
+ 
+ 	switch (cpu_id) {
+ 	case BCM3368_CPU_ID:
+--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
++++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
+@@ -28,7 +28,7 @@ u32 bcm63xx_get_cpu_variant(void);
+ u8 bcm63xx_get_cpu_rev(void);
+ unsigned int bcm63xx_get_cpu_freq(void);
+ 
+-static inline u16 __pure __bcm63xx_get_cpu_id(const u16 cpu_id)
++static inline u32 __pure __bcm63xx_get_cpu_id(const u32 cpu_id)
+ {
+ 	switch (cpu_id) {
+ #ifdef CONFIG_BCM63XX_CPU_3368
+@@ -70,11 +70,11 @@ static inline u16 __pure __bcm63xx_get_c
+ 	return cpu_id;
+ }
+ 
+-extern u16 bcm63xx_cpu_id;
++extern u32 bcm63xx_cpu_id;
+ 
+-static inline u16 __pure bcm63xx_get_cpu_id(void)
++static inline u32 __pure bcm63xx_get_cpu_id(void)
+ {
+-	const u16 cpu_id = bcm63xx_cpu_id;
++	const u32 cpu_id = bcm63xx_cpu_id;
+ 
+ 	return __bcm63xx_get_cpu_id(cpu_id);
+ }