kernel: brcm47xx: Backport fixes for USB on WNDR3400v2 (fixes FS#2170)

Eric has reported on OpenWrt's bug tracking system[1], that he's not
able to use USB devices on his WNDR3400v2 device after the boot, until
he turns on GPIO #21 manually through sysfs.

1. https://bugs.openwrt.org/index.php?do=details&task_id=2170

Signed-off-by: Petr Štetiar <ynezz@true.cz>

target/linux/brcm47xx/patches-4.14/035-v5.1-mips-bcm47xx-Enable-USB-power-on-Netgear-WNDR3400v2.patch

@@ -0,0 +1,39 @@
+From cdb8faa00e3fcdd0ad10add743516d616dc7d38e Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20=C5=A0tetiar?= <ynezz@true.cz>
+Date: Mon, 11 Mar 2019 22:08:22 +0100
+Subject: [PATCH] mips: bcm47xx: Enable USB power on Netgear WNDR3400v2
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Eric has reported on OpenWrt's bug tracking system[1], that he's not
+able to use USB devices on his WNDR3400v2 device after the boot, until
+he turns on GPIO #21 manually through sysfs.
+
+1. https://bugs.openwrt.org/index.php?do=details&task_id=2170
+
+Cc: Rafał Miłecki <zajec5@gmail.com>
+Cc: Hauke Mehrtens <hauke@hauke-m.de>
+Reported-by: Eric Bohlman <ericbohlman@gmail.com>
+Tested-by: Eric Bohlman <ericbohlman@gmail.com>
+Signed-off-by: Petr Štetiar <ynezz@true.cz>
+Signed-off-by: Paul Burton <paul.burton@mips.com>
+---
+ arch/mips/bcm47xx/workarounds.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/arch/mips/bcm47xx/workarounds.c b/arch/mips/bcm47xx/workarounds.c
+index 46eddbe..0ab95dd 100644
+--- a/arch/mips/bcm47xx/workarounds.c
++++ b/arch/mips/bcm47xx/workarounds.c
+@@ -24,6 +24,7 @@ void __init bcm47xx_workarounds(void)
+ 	case BCM47XX_BOARD_NETGEAR_WNR3500L:
+ 		bcm47xx_workarounds_enable_usb_power(12);
+ 		break;
++	case BCM47XX_BOARD_NETGEAR_WNDR3400V2:
+ 	case BCM47XX_BOARD_NETGEAR_WNDR3400_V3:
+ 		bcm47xx_workarounds_enable_usb_power(21);
+ 		break;
+-- 
+1.9.1
+

target/linux/brcm47xx/patches-4.19/031-v5.1-mips-bcm47xx-Enable-USB-power-on-Netgear-WNDR3400v2.patch

@@ -0,0 +1,39 @@
+From cdb8faa00e3fcdd0ad10add743516d616dc7d38e Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20=C5=A0tetiar?= <ynezz@true.cz>
+Date: Mon, 11 Mar 2019 22:08:22 +0100
+Subject: [PATCH] mips: bcm47xx: Enable USB power on Netgear WNDR3400v2
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Eric has reported on OpenWrt's bug tracking system[1], that he's not
+able to use USB devices on his WNDR3400v2 device after the boot, until
+he turns on GPIO #21 manually through sysfs.
+
+1. https://bugs.openwrt.org/index.php?do=details&task_id=2170
+
+Cc: Rafał Miłecki <zajec5@gmail.com>
+Cc: Hauke Mehrtens <hauke@hauke-m.de>
+Reported-by: Eric Bohlman <ericbohlman@gmail.com>
+Tested-by: Eric Bohlman <ericbohlman@gmail.com>
+Signed-off-by: Petr Štetiar <ynezz@true.cz>
+Signed-off-by: Paul Burton <paul.burton@mips.com>
+---
+ arch/mips/bcm47xx/workarounds.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/arch/mips/bcm47xx/workarounds.c b/arch/mips/bcm47xx/workarounds.c
+index 46eddbe..0ab95dd 100644
+--- a/arch/mips/bcm47xx/workarounds.c
++++ b/arch/mips/bcm47xx/workarounds.c
+@@ -24,6 +24,7 @@ void __init bcm47xx_workarounds(void)
+ 	case BCM47XX_BOARD_NETGEAR_WNR3500L:
+ 		bcm47xx_workarounds_enable_usb_power(12);
+ 		break;
++	case BCM47XX_BOARD_NETGEAR_WNDR3400V2:
+ 	case BCM47XX_BOARD_NETGEAR_WNDR3400_V3:
+ 		bcm47xx_workarounds_enable_usb_power(21);
+ 		break;
+-- 
+1.9.1
+