linux-kernel - [PATCH] MIPS: BCM47XX: Enable USB power on Netgear WNDR3400v3

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Message-Id: <20180819192023.18463-1-tuomas.tynkkynen@iki.fi>
Date:   Sun, 19 Aug 2018 22:20:23 +0300
From:   Tuomas Tynkkynen <tuomas.tynkkynen@....fi>
To:     Hauke Mehrtens <hauke@...ke-m.de>,
        Rafał Miłecki <zajec5@...il.com>
Cc:     linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org,
        Tuomas Tynkkynen <tuomas.tynkkynen@....fi>
Subject: [PATCH] MIPS: BCM47XX: Enable USB power on Netgear WNDR3400v3

Setting GPIO 21 high seems to be required to enable power to USB ports
on the WNDR3400v3. As there is already similar code for WNR3500L,
make the existing USB power GPIO code generic and use that.

Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@....fi>
---
 arch/mips/bcm47xx/workarounds.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/mips/bcm47xx/workarounds.c b/arch/mips/bcm47xx/workarounds.c
index 1a8a07e7a563..46eddbec8d9f 100644
--- a/arch/mips/bcm47xx/workarounds.c
+++ b/arch/mips/bcm47xx/workarounds.c
@@ -5,9 +5,8 @@
 #include <bcm47xx_board.h>
 #include <bcm47xx.h>
 
-static void __init bcm47xx_workarounds_netgear_wnr3500l(void)
+static void __init bcm47xx_workarounds_enable_usb_power(int usb_power)
 {
-	const int usb_power = 12;
 	int err;
 
 	err = gpio_request_one(usb_power, GPIOF_OUT_INIT_HIGH, "usb_power");
@@ -23,7 +22,10 @@ void __init bcm47xx_workarounds(void)
 
 	switch (board) {
 	case BCM47XX_BOARD_NETGEAR_WNR3500L:
-		bcm47xx_workarounds_netgear_wnr3500l();
+		bcm47xx_workarounds_enable_usb_power(12);
+		break;
+	case BCM47XX_BOARD_NETGEAR_WNDR3400_V3:
+		bcm47xx_workarounds_enable_usb_power(21);
 		break;
 	default:
 		/* No workaround(s) needed */
-- 
2.16.3