Re: [PATCH v4 11/21] ARM: dts: imx6qdl-apalis: Add sleep state to can interfaces

Shawn Guo
2019-08-19T11:28:10Z

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.

> + 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
>