linux-kernel - Re: [PATCH 11/22] ARM: dts: imx6: Add sleep state to can interfaces

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Date:   Wed, 31 Jul 2019 11:13:04 +0000
From:   Philippe Schenker <philippe.schenker@...adex.com>
To:     "stefan@...er.ch" <stefan@...er.ch>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Max Krummenacher <max.krummenacher@...adex.com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "michal.vokac@...ft.com" <michal.vokac@...ft.com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>
CC:     "festevam@...il.com" <festevam@...il.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-imx@....com" <linux-imx@....com>
Subject: Re: [PATCH 11/22] ARM: dts: imx6: Add sleep state to can interfaces

On Wed, 2019-07-31 at 09:14 +0200, Michal Vokáč wrote:
> On 30. 07. 19 16:46, Philippe Schenker wrote:
> > From: Philippe Schenker <philippe.schenker@...adex.com>
> > 
> > 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@...adex.com>
> > ---
> 
> What about "ARM: dts: imx6qdl-apalis: " for the subject?
> To be clear that this is not related to the imx6 SoC itself.

Thanks for your comments Michal! Will takte those into account for v2.

> 
> >   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>;
> > +	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 {
> > +	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 = <
> >