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

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

[Tuomas Tynkkynen]

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@iki.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

Re: [PATCH] MIPS: BCM47XX: Enable USB power on Netgear WNDR3400v3

[Hauke Mehrtens]

On 08/19/2018 09:20 PM, Tuomas Tynkkynen wrote:
> 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@iki.fi>

I didn't runtime tested this and didn't checked the board, but this
looks good.

Acked-by: Hauke Mehrtens <hauke@hauke-m.de>

> ---
>  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 */
> 

Re: [PATCH] MIPS: BCM47XX: Enable USB power on Netgear WNDR3400v3

[Paul Burton]

Hi Tuomas,

On Sun, Aug 19, 2018 at 10:20:23PM +0300, Tuomas Tynkkynen wrote:
> 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@iki.fi>
> ---
>  arch/mips/bcm47xx/workarounds.c | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)

It'd be nice to see this stuff move towards DT, and configuring a GPIO
to enable power doesn't seem so much a workaround as a normal expected
part of operation.

But I've applied this to mips-next for 4.20 since it doesn't really make
things any worse for now...

Thanks,
    Paul