linux-kernel - RE: [PATCH V2] arm64: dts: imx8mp-evk: add CAN support

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Message-ID: <DB8PR04MB67953476E69F68BA5DEEB77AE6110@DB8PR04MB6795.eurprd04.prod.outlook.com>
Date:   Tue, 3 Nov 2020 07:46:42 +0000
From:   Joakim Zhang <qiangqing.zhang@....com>
To:     Krzysztof Kozlowski <krzk@...nel.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>
CC:     "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mkl@...gutronix.de" <mkl@...gutronix.de>
Subject: RE: [PATCH V2] arm64: dts: imx8mp-evk: add CAN support


> -----Original Message-----
> From: Krzysztof Kozlowski <krzk@...nel.org>
> Sent: 2020年11月3日 15:39
> To: Joakim Zhang <qiangqing.zhang@....com>
> Cc: shawnguo@...nel.org; s.hauer@...gutronix.de; festevam@...il.com;
> dl-linux-imx <linux-imx@....com>; devicetree@...r.kernel.org;
> linux-arm-kernel@...ts.infradead.org; linux-kernel@...r.kernel.org;
> mkl@...gutronix.de
> Subject: Re: [PATCH V2] arm64: dts: imx8mp-evk: add CAN support
> 
> On Tue, Nov 03, 2020 at 01:23:12AM +0000, Joakim Zhang wrote:
> >
> > > -----Original Message-----
> > > From: Krzysztof Kozlowski <krzk@...nel.org>
> > > Sent: 2020年11月2日 16:29
> > > To: Joakim Zhang <qiangqing.zhang@....com>
> > > Cc: shawnguo@...nel.org; s.hauer@...gutronix.de;
> festevam@...il.com;
> > > dl-linux-imx <linux-imx@....com>; devicetree@...r.kernel.org;
> > > linux-arm-kernel@...ts.infradead.org; linux-kernel@...r.kernel.org;
> > > mkl@...gutronix.de
> > > Subject: Re: [PATCH V2] arm64: dts: imx8mp-evk: add CAN support
> > >
> > > On Mon, Nov 02, 2020 at 10:16:34AM +0800, Joakim Zhang wrote:
> > > > Add CAN device node and pinctrl on i.MX8MP evk board.
> > > >
> > > > Signed-off-by: Joakim Zhang <qiangqing.zhang@....com>
> > > > ---
> > > > ChangeLogs:
> > > > V1->V2:
> > > > 	* add missing space before '=',
> > > > 	fsl,clk-source= /bits/ 8 <0> -> fsl,clk-source = /bits/ 8 <0>
> > > > ---
> > > >  arch/arm64/boot/dts/freescale/imx8mp-evk.dts | 62
> > > ++++++++++++++++++++
> > > >  arch/arm64/boot/dts/freescale/imx8mp.dtsi    | 30 ++++++++++
> > > >  2 files changed, 92 insertions(+)
> > > >
> > > > diff --git a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
> > > > b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
> > > > index 908b92bb4dcd..b10dce8767a4 100644
> > > > --- a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
> > > > +++ b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
> > > > @@ -33,6 +33,28 @@
> > > >  		      <0x1 0x00000000 0 0xc0000000>;
> > > >  	};
> > > >
> > > > +	reg_can1_stby: regulator-can1-stby {
> > > > +		compatible = "regulator-fixed";
> > > > +		regulator-name = "can1-stby";
> > > > +		pinctrl-names = "default";
> > > > +		pinctrl-0 = <&pinctrl_flexcan1_reg>;
> > > > +		regulator-min-microvolt = <3300000>;
> > > > +		regulator-max-microvolt = <3300000>;
> > > > +		gpio = <&gpio5 5 GPIO_ACTIVE_HIGH>;
> > > > +		enable-active-high;
> > > > +	};
> > > > +
> > > > +	reg_can2_stby: regulator-can2-stby {
> > > > +		compatible = "regulator-fixed";
> > > > +		regulator-name = "can2-stby";
> > > > +		pinctrl-names = "default";
> > > > +		pinctrl-0 = <&pinctrl_flexcan2_reg>;
> > > > +		regulator-min-microvolt = <3300000>;
> > > > +		regulator-max-microvolt = <3300000>;
> > > > +		gpio = <&gpio4 27 GPIO_ACTIVE_HIGH>;
> > > > +		enable-active-high;
> > > > +	};
> > > > +
> > > >  	reg_usdhc2_vmmc: regulator-usdhc2 {
> > > >  		compatible = "regulator-fixed";
> > > >  		pinctrl-names = "default";
> > > > @@ -45,6 +67,20 @@
> > > >  	};
> > > >  };
> > > >
> > > > +&flexcan1 {
> > > > +	pinctrl-names = "default";
> > > > +	pinctrl-0 = <&pinctrl_flexcan1>;
> > > > +	xceiver-supply = <&reg_can1_stby>;
> > > > +	status = "okay";
> > > > +};
> > > > +
> > > > +&flexcan2 {
> > > > +	pinctrl-names = "default";
> > > > +	pinctrl-0 = <&pinctrl_flexcan2>;
> > > > +	xceiver-supply = <&reg_can2_stby>;
> > > > +	status = "disabled";/* can2 pin conflict with pdm */ };
> > > > +
> > > >  &fec {
> > > >  	pinctrl-names = "default";
> > > >  	pinctrl-0 = <&pinctrl_fec>;
> > > > @@ -144,6 +180,32 @@
> > > >  		>;
> > > >  	};
> > > >
> > > > +	pinctrl_flexcan1: flexcan1grp {
> > > > +		fsl,pins = <
> > > > +			MX8MP_IOMUXC_SPDIF_RX__CAN1_RX          0x154
> > > > +			MX8MP_IOMUXC_SPDIF_TX__CAN1_TX          0x154
> > > > +		>;
> > > > +	};
> > > > +
> > > > +	pinctrl_flexcan2: flexcan2grp {
> > > > +		fsl,pins = <
> > > > +			MX8MP_IOMUXC_SAI5_MCLK__CAN2_RX
> 0x154
> > > > +			MX8MP_IOMUXC_SAI5_RXD3__CAN2_TX         0x154
> > > > +		>;
> > > > +	};
> > > > +
> > > > +	pinctrl_flexcan1_reg: flexcan1reggrp {
> > > > +		fsl,pins = <
> > > > +			MX8MP_IOMUXC_SPDIF_EXT_CLK__GPIO5_IO05  0x154
> /*
> > > CAN1_STBY */
> > > > +		>;
> > > > +	};
> > > > +
> > > > +	pinctrl_flexcan2_reg: flexcan2reggrp {
> > > > +		fsl,pins = <
> > > > +			MX8MP_IOMUXC_SAI2_MCLK__GPIO4_IO27      0x154
> > > /* CAN2_STBY */
> > > > +		>;
> > > > +	};
> > > > +
> > > >  	pinctrl_gpio_led: gpioledgrp {
> > > >  		fsl,pins = <
> > > >  			MX8MP_IOMUXC_NAND_READY_B__GPIO3_IO16	0x19
> > > > diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > > > b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > > > index 479312293036..ecccfbb4f5ad 100644
> > > > --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > > > +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > > > @@ -552,6 +552,36 @@
> > > >  				status = "disabled";
> > > >  			};
> > > >
> > > > +			flexcan1: can@...c0000 {
> > > > +				compatible = "fsl,imx8mp-flexcan",
> "fsl,imx6q-flexcan";
> > >
> > > Undocumented compatible in
> > > Documentation/devicetree/bindings/net/can/fsl-flexcan.txt
> >
> > Hi Krzsztof,
> >
> > Yes, I will resend the patch after below patch goes into mainline. Thanks.
> > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.
> >
> spinics.net%2Flists%2Flinux-can%2Fmsg04896.html&amp;data=04%7C01%7Cq
> ia
> >
> ngqing.zhang%40nxp.com%7C2f9b2df0480f4de63a6f08d87fcb8ad8%7C686ea1
> d3bc
> >
> 2b4c6fa92cd99c5c301635%7C0%7C0%7C637399859470358123%7CUnknown
> %7CTWFpbG
> >
> Zsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6M
> n0%
> >
> 3D%7C1000&amp;sdata=0Dhxa3tOXVsHySV8wblYoORpwcupGsZzThSdauJH8T
> M%3D&amp
> > ;reserved=0
> 
> Thanks for the link. It's all good and there is no need to resend because your
> compatible is mentioned there.


Yes, "fsl,imx8mp-flexcan" compatible string is mentioned there, then could anyone apply this patch? Shawn?

Best Regards,
Joakim Zhang
> Best regards,
> Krzysztof