Re: [PATCH RFT 2/2] macb: kill PHY reset code

[Sergei Shtylyov]

Hello.

On 4/12/2016 12:22 PM, Nicolas Ferre wrote:

> > > With  the 'phylib' now  being aware of  the "reset-gpios" PHY node property,
> > > there should be no need to frob the PHY reset in this  driver anymore...
> > >
> > > Signed-off-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
> > >
> > > ---
> > >   drivers/net/ethernet/cadence/macb.c |   17 -----------------
> > >   drivers/net/ethernet/cadence/macb.h |    1 -
> > >   2 files changed, 18 deletions(-)
> > >
> > > Index: net-next/drivers/net/ethernet/cadence/macb.c
> > > ===================================================================
> > > --- net-next.orig/drivers/net/ethernet/cadence/macb.c
> > > +++ net-next/drivers/net/ethernet/cadence/macb.c
[...]
> > > @@ -2977,18 +2976,6 @@ static int macb_probe(struct platform_de
> > >   	else
> > >   		macb_get_hwaddr(bp);
> > >
> > > -	/* Power up the PHY if there is a GPIO reset */
> > > -	phy_node =  of_get_next_available_child(np, NULL);
> > > -	if (phy_node) {
> > > -		int gpio = of_get_named_gpio(phy_node, "reset-gpios", 0);
> > > -
> > > -		if (gpio_is_valid(gpio)) {
> > > -			bp->reset_gpio = gpio_to_desc(gpio);
> > > -			gpiod_direction_output(bp->reset_gpio, 1);
> >
> > Hi Sergei
> >
> > The code you are deleting would of ignored the flags in the gpio
>
> I don't parse this.

> The code deleted does take the flag into account.

   Not really -- you need to call of_get_named_gpio_flags() (with a valid 
last argument) for that.

> And the DT property
> associated to it seems correct to me (I mean, with proper flag
> specification).

   It apparently is not as it have GPIO_ACTIVE_HIGH and the driver assumes 
active-low reset signal.

[...]
> Bye,

MBR, Sergei