On Wed, 2018-02-28 at 15:49 +0800, Zhiyong Tao wrote:
> On Wed, 2018-02-28 at 15:33 +0800, Sean Wang wrote:
> > On Mon, 2018-02-26 at 16:34 +0800, Zhiyong Tao wrote:
> > > For generic pins, parameter "arg" is 0 or 1.
> > > For special pins, bias-disable is set by R0R1,
> > > so we need transmited "00" to set bias-disable
> > > When we set "bias-disable" as high-z property,
> > > the parameter should be "MTK_PUPD_SET_R1R0_00".
> > >
> > > Signed-off-by: Zhiyong Tao <zhiyong.tao@xxxxxxxxxxxx>
> > > ---
> > > drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 13 +++++++++++--
> > > 1 file changed, 11 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> > > index 3cf384f..e88ba04 100644
> > > --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> > > +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> > > @@ -301,8 +301,17 @@ static int mtk_pconf_set_pull_select(struct mtk_pinctrl *pctl,
> > > * resistor bit, so we need this special handle.
> > > */
> > > if (pctl->devdata->spec_pull_set) {
> > > - ret = pctl->devdata->spec_pull_set(mtk_get_regmap(pctl, pin),
> > > - pin, pctl->devdata->port_align, isup, arg);
> > > + if (enable) {
> > > + ret = pctl->devdata->spec_pull_set(
> > > + mtk_get_regmap(pctl, pin), pin,
> > > + pctl->devdata->port_align, isup,
> > > + arg);
> > > + } else {
> > > + ret = pctl->devdata->spec_pull_set(
> > > + mtk_get_regmap(pctl, pin), pin,
> > > + pctl->devdata->port_align, isup,
> > > + MTK_PUPD_SET_R1R0_00);
> > > + }
> >
> >
> > it looks like you can use as following snippet with reusing original
> > logic and less effort on maintaining these common code (?)
> ==> Thanks for your suggestion very much. It seems better.
> I will change it in v3.
==>
Hi sean,
we try it in our site. we can't change like this.
Because we will check "arg" after setting "arg = MTK_PUPD_SET_R1R0_00;".
following snippet which check "arg" value is o or 1. If it not, which
will print error. so we can't change like this.
/* For generic pull config, default arg value should be 0 or 1. */
if (arg != 0 && arg != 1) {
dev_err(pctl->dev, "invalid pull-up argument %d on pin %d .\n", arg,
pin);
return -EINVAL;
}
Thanks.
> >
> >
> > if (pctl->devdata->spec_pull_set) {
> > + if (!enable)
> > + arg = MTK_PUPD_SET_R1R0_00;
> >
> > ret = pctl->devdata->spec_pull_set(mtk_get_regmap(pctl, pin),
> > pin, pctl->devdata->port_align, isup, arg);
> >
> >
> > Also, it's better to add more comments to such kind of special path for
> > allowing future SoCs to follow and extend more easily.
>
> ==> Thanks for your suggestion very much. I will add more comments here.
> >
> > > if (!ret)
> > > return 0;
> > > }
> >
> >
>
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