On 07/07/2015 04:27 PM, Roger Quadros wrote: > From: "J.D. Schroeder" <jay.schroe...@garmin.com> > > The previous change 3973c526ae9c (net: can: c_can: Disable pins when CAN > interface > is down) causes a slight glitch on the pinctrl settings when used. Since > commit ab78029 (drivers/pinctrl: grab default handles from device core), > the device core will automatically set the default pins. This causes > the pins to be momentarily set to the default and then to the sleep > state in register_c_can_dev(). By adding an optional "enable" state, > boards can set the default pin state to be disabled and avoid the > glitch when the switch from default to sleep first occurs. If the > "enable" state is not available c_can_pinctrl_select_state() falls > back to using the "default" pinctrl state. > > [Roger Q] - Forward port to v4.2 > > Signed-off-by: J.D. Schroeder <jay.schroe...@garmin.com> > Signed-off-by: Roger Quadros <rog...@ti.com> > --- > drivers/net/can/c_can/c_can.c | 13 ++++++++++++- > 1 file changed, 12 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/can/c_can/c_can.c b/drivers/net/can/c_can/c_can.c > index 041525d..66e98e7 100644 > --- a/drivers/net/can/c_can/c_can.c > +++ b/drivers/net/can/c_can/c_can.c > @@ -605,7 +605,18 @@ static int c_can_start(struct net_device *dev) > priv->can.state = CAN_STATE_ERROR_ACTIVE; > > /* activate pins */ > - pinctrl_pm_select_default_state(dev->dev.parent); > +#ifdef CONFIG_PINCTRL
Please remove the ifdef, AFAICS there are static inline noop functions
if CONFIG_PINCTRL switched off.
> + if (priv->device->pins) {
> + struct pinctrl_state *s;
> +
> + /* Attempt to use "active" if available else use "default" */
> + s = pinctrl_lookup_state(priv->device->pins->p, "active");
> + if (!IS_ERR(s))
> + pinctrl_select_state(priv->device->pins->p, s);
> + else
> + pinctrl_pm_select_default_state(dev->dev.parent);
> + }
> +#endif
> return 0;
> }
>
>
Marc
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