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SubjectRe: [PATCH v4 11/21] ARM: dts: imx6qdl-apalis: Add sleep state to can interfaces
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On Mon, 2019-08-19 at 13:27 +0200, Shawn Guo wrote:
> On Mon, Aug 12, 2019 at 02:21:31PM +0000, Philippe Schenker wrote:
> > This patch prepares the devicetree for the new Ixora V1.2 where we
> > are
> > able to turn off the supply of the can transceiver. This implies to
> > use
> > a sleep state on transmission pins in order to prevent backfeeding.
> >
> > Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
> > Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
> >
> > ---
> >
> > Changes in v4:
> > - Add Marcel Ziswiler's Ack
> >
> > Changes in v3: None
> > Changes in v2:
> > - Changed commit title to '...imx6qdl-apalis:...'
> >
> > arch/arm/boot/dts/imx6qdl-apalis.dtsi | 27 +++++++++++++++++++++---
> > ---
> > 1 file changed, 21 insertions(+), 6 deletions(-)
> >
> > diff --git a/arch/arm/boot/dts/imx6qdl-apalis.dtsi
> > b/arch/arm/boot/dts/imx6qdl-apalis.dtsi
> > index 7c4ad541c3f5..59ed2e4a1fd1 100644
> > --- a/arch/arm/boot/dts/imx6qdl-apalis.dtsi
> > +++ b/arch/arm/boot/dts/imx6qdl-apalis.dtsi
> > @@ -148,14 +148,16 @@
> > };
> >
> > &can1 {
> > - pinctrl-names = "default";
> > - pinctrl-0 = <&pinctrl_flexcan1>;
>
> This line doesn't need to be changed.

You're right, but by adding pinctrl_flexcan1_sleep here, I'd like to
emphasize between "default" and "sleep" and change that.

Since it's only used in this file I don't see any problems.

Philippe
>
> > + pinctrl-names = "default", "sleep";
> > + pinctrl-0 = <&pinctrl_flexcan1_default>;
> > + pinctrl-1 = <&pinctrl_flexcan1_sleep>;
> > status = "disabled";
> > };
> >
> > &can2 {
> > - pinctrl-names = "default";
> > - pinctrl-0 = <&pinctrl_flexcan2>;
> > + pinctrl-names = "default", "sleep";
> > + pinctrl-0 = <&pinctrl_flexcan2_default>;
> > + pinctrl-1 = <&pinctrl_flexcan2_sleep>;
> > status = "disabled";
> > };
> >
> > @@ -599,19 +601,32 @@
> > >;
> > };
> >
> > - pinctrl_flexcan1: flexcan1grp {
>
> Ditto. I take them as unnecessary changes.
>
> Shawn
>
> > + pinctrl_flexcan1_default: flexcan1defgrp {
> > fsl,pins = <
> > MX6QDL_PAD_GPIO_7__FLEXCAN1_TX 0x1b0b0
> > MX6QDL_PAD_GPIO_8__FLEXCAN1_RX 0x1b0b0
> > >;
> > };
> >
> > - pinctrl_flexcan2: flexcan2grp {
> > + pinctrl_flexcan1_sleep: flexcan1slpgrp {
> > + fsl,pins = <
> > + MX6QDL_PAD_GPIO_7__GPIO1_IO07 0x0
> > + MX6QDL_PAD_GPIO_8__GPIO1_IO08 0x0
> > + >;
> > + };
> > +
> > + pinctrl_flexcan2_default: flexcan2defgrp {
> > fsl,pins = <
> > MX6QDL_PAD_KEY_COL4__FLEXCAN2_TX 0x1b0b0
> > MX6QDL_PAD_KEY_ROW4__FLEXCAN2_RX 0x1b0b0
> > >;
> > };
> > + pinctrl_flexcan2_sleep: flexcan2slpgrp {
> > + fsl,pins = <
> > + MX6QDL_PAD_KEY_COL4__GPIO4_IO14 0x0
> > + MX6QDL_PAD_KEY_ROW4__GPIO4_IO15 0x0
> > + >;
> > + };
> >
> > pinctrl_gpio_bl_on: gpioblon {
> > fsl,pins = <
> > --
> > 2.22.0
> >
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