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, 59 insertions, 0 deletions

diff --git a/target/linux/brcm63xx/patches-4.19/379-MIPS-BCM63XX-provide-a-gpio-lookup-for-the-pcmcia-re.patch b/target/linux/brcm63xx/patches-4.19/379-MIPS-BCM63XX-provide-a-gpio-lookup-for-the-pcmcia-re.patch
new file mode 100644
index 0000000000..b5719990bd
--- /dev/null
+++ b/target/linux/brcm63xx/patches-4.19/379-MIPS-BCM63XX-provide-a-gpio-lookup-for-the-pcmcia-re.patch
@@ -0,0 +1,59 @@
+From 1647cccc871bf43876c3df9852869680880d054c Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jogo@openwrt.org>
+Date: Wed, 25 Mar 2015 13:52:02 +0100
+Subject: [PATCH 1/2] MIPS: BCM63XX: provide a gpio lookup for the pcmcia
+ ready gpio
+
+To prepare for a time when gpiobases don't need to be fixed anymore.
+
+Signed-off-by: Jonas Gorski <jogo@openwrt.org>
+---
+ arch/mips/bcm63xx/dev-pcmcia.c |   13 +++++++++++++
+ 1 file changed, 13 insertions(+)
+
+--- a/arch/mips/bcm63xx/dev-pcmcia.c
++++ b/arch/mips/bcm63xx/dev-pcmcia.c
+@@ -10,6 +10,7 @@
+ #include <linux/kernel.h>
+ #include <asm/bootinfo.h>
+ #include <linux/platform_device.h>
++#include <linux/gpio/machine.h>
+ #include <bcm63xx_cs.h>
+ #include <bcm63xx_cpu.h>
+ #include <bcm63xx_dev_pcmcia.h>
+@@ -101,6 +102,14 @@ static const struct {
+ 	},
+ };
+ 
++static struct gpiod_lookup_table pcmcia_gpios_table = {
++	.dev_id = "bcm63xx_pcmcia.0",
++	.table = {
++		GPIO_LOOKUP("bcm63xx-gpio.0", 0, "ready", GPIO_ACTIVE_HIGH),
++		{ },
++	},
++};
++
+ int __init bcm63xx_pcmcia_register(void)
+ {
+ 	int ret, i;
+@@ -112,16 +121,20 @@ int __init bcm63xx_pcmcia_register(void)
+ 	switch (bcm63xx_get_cpu_id()) {
+ 	case BCM6348_CPU_ID:
+ 		pd.ready_gpio = 22;
++		pcmcia_gpios_table.table[0].chip_hwnum = 22;
+ 		break;
+ 
+ 	case BCM6358_CPU_ID:
+ 		pd.ready_gpio = 18;
++		pcmcia_gpios_table.table[0].chip_hwnum = 18;
+ 		break;
+ 
+ 	default:
+ 		return -ENODEV;
+ 	}
+ 
++	gpiod_add_lookup_table(&pcmcia_gpios_table);
++
+ 	pcmcia_resources[0].start = bcm63xx_regset_address(RSET_PCMCIA);
+ 	pcmcia_resources[0].end = pcmcia_resources[0].start +
+ 		RSET_PCMCIA_SIZE - 1;