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, 129 insertions, 0 deletions

diff --git a/target/linux/brcm63xx/patches-4.19/377-MIPS-BCM63XX-register-lookup-for-ephy-reset-gpio.patch b/target/linux/brcm63xx/patches-4.19/377-MIPS-BCM63XX-register-lookup-for-ephy-reset-gpio.patch
new file mode 100644
index 0000000000..c061ec4e60
--- /dev/null
+++ b/target/linux/brcm63xx/patches-4.19/377-MIPS-BCM63XX-register-lookup-for-ephy-reset-gpio.patch
@@ -0,0 +1,129 @@
+From d13bdf92ec885105cf107183f8464c40e5f3b93b Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jogo@openwrt.org>
+Date: Sat, 21 Feb 2015 17:21:59 +0100
+Subject: [PATCH 4/6] MIPS: BCM63XX: register lookup for ephy-reset gpio
+
+
+Signed-off-by: Jonas Gorski <jogo@openwrt.org>
+---
+ arch/mips/bcm63xx/boards/board_bcm963xx.c          |    2 +-
+ arch/mips/bcm63xx/boards/board_common.c            |    7 +++--
+ arch/mips/bcm63xx/gpio.c                           |   32 ++++++++++++++++++++
+ arch/mips/include/asm/mach-bcm63xx/bcm63xx_gpio.h  |    2 ++
+ .../mips/include/asm/mach-bcm63xx/board_bcm963xx.h |    5 +--
+ 5 files changed, 42 insertions(+), 6 deletions(-)
+
+--- a/arch/mips/bcm63xx/boards/board_bcm963xx.c
++++ b/arch/mips/bcm63xx/boards/board_bcm963xx.c
+@@ -55,7 +55,7 @@ static struct board_info __initdata boar
+ 	},
+ 
+ 	.ephy_reset_gpio		= 36,
+-	.ephy_reset_gpio_flags		= GPIOF_INIT_HIGH,
++	.ephy_reset_gpio_flags		= GPIO_ACTIVE_LOW,
+ };
+ #endif
+ 
+--- a/arch/mips/bcm63xx/boards/board_common.c
++++ b/arch/mips/bcm63xx/boards/board_common.c
+@@ -247,9 +247,10 @@ int __init board_register_devices(void)
+ 
+ 	platform_device_register(&bcm63xx_gpio_leds);
+ 
+-	if (board.ephy_reset_gpio && board.ephy_reset_gpio_flags)
+-		gpio_request_one(board.ephy_reset_gpio,
+-				board.ephy_reset_gpio_flags, "ephy-reset");
++	if (board.ephy_reset_gpio && board.ephy_reset_gpio_flags) {
++		bcm63xx_gpio_ephy_reset(board.ephy_reset_gpio,
++					board.ephy_reset_gpio_flags);
++	}
+ 
+ 	return 0;
+ }
+--- a/arch/mips/bcm63xx/gpio.c
++++ b/arch/mips/bcm63xx/gpio.c
+@@ -8,15 +8,23 @@
+  * Copyright (C) Jonas Gorski <jogo@openwrt.org>
+  */
+ 
++#include <asm/addrspace.h>
++
+ #include <linux/kernel.h>
+ #include <linux/init.h>
+ #include <linux/platform_device.h>
+ #include <linux/gpio/driver.h>
++#include <linux/gpio/machine.h>
+ 
+ #include <bcm63xx_cpu.h>
+ #include <bcm63xx_gpio.h>
+ #include <bcm63xx_regs.h>
+ 
++static const char * const gpio_chip_labels[] = {
++	"bcm63xx-gpio.0",
++	"bcm63xx-gpio.1",
++};
++
+ static void __init bcm63xx_gpio_init_one(int id, int dir, int data, int ngpio)
+ {
+ 	struct resource res[2];
+@@ -64,3 +72,25 @@ int __init bcm63xx_gpio_init(void)
+ 	return 0;
+ 
+ }
++
++static struct gpiod_lookup_table ephy_reset = {
++	.dev_id = "bcm63xx_enet-0",
++	.table = {
++		{ /* filled at runtime */ },
++		{ },
++	},
++};
++
++
++void bcm63xx_gpio_ephy_reset(int hw_gpio, enum gpio_lookup_flags flags)
++{
++	if (ephy_reset.table[0].chip_label)
++		return;
++
++	ephy_reset.table[0].chip_label = gpio_chip_labels[hw_gpio / 32];
++	ephy_reset.table[0].chip_hwnum = hw_gpio % 32;
++	ephy_reset.table[0].con_id = "reset";
++	ephy_reset.table[0].flags = flags;
++
++	gpiod_add_lookup_table(&ephy_reset);
++}
+--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_gpio.h
++++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_gpio.h
+@@ -3,9 +3,11 @@
+ #define BCM63XX_GPIO_H
+ 
+ #include <linux/init.h>
++#include <linux/gpio/machine.h>
+ #include <bcm63xx_cpu.h>
+ 
+ int __init bcm63xx_gpio_init(void);
++void bcm63xx_gpio_ephy_reset(int hw_gpio, enum gpio_lookup_flags flags);
+ 
+ static inline unsigned long bcm63xx_gpio_count(void)
+ {
+--- a/arch/mips/include/asm/mach-bcm63xx/board_bcm963xx.h
++++ b/arch/mips/include/asm/mach-bcm63xx/board_bcm963xx.h
+@@ -4,6 +4,7 @@
+ 
+ #include <linux/types.h>
+ #include <linux/gpio.h>
++#include <linux/gpio/machine.h>
+ #include <linux/leds.h>
+ #include <bcm63xx_dev_enet.h>
+ #include <bcm63xx_dev_usb_usbd.h>
+@@ -50,8 +51,8 @@ struct board_info {
+ 	/* External PHY reset GPIO */
+ 	unsigned int ephy_reset_gpio;
+ 
+-	/* External PHY reset GPIO flags from gpio.h */
+-	unsigned long ephy_reset_gpio_flags;
++	/* External PHY reset GPIO flags from gpio/machine.h */
++	enum gpio_lookup_flags ephy_reset_gpio_flags;
+ 
+ 	/* fallback sprom config */
+ 	struct fallback_sprom_data fallback_sprom;