linux-kernel - Re: [PATCH 4/5] ARM: dts: at91: at91-sama5d27_som1: add sama5d27 SoM1 support

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Message-ID: <20170629145841.srpjgcdw7jo2f6as@rfolt0960.corp.atmel.com>
Date:   Thu, 29 Jun 2017 16:58:41 +0200
From:   Ludovic Desroches <ludovic.desroches@...rochip.com>
To:     Claudiu Beznea <claudiu.beznea@...rochip.com>
CC:     <nicolas.ferre@...rochip.com>,
        <alexandre.belloni@...e-electrons.com>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <linux@...linux.org.uk>, <sza@....hu>,
        <devicetree@...r.kernel.org>, <cristian.birsan@...rochip.com>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 4/5] ARM: dts: at91: at91-sama5d27_som1: add sama5d27
 SoM1 support

On Thu, Jun 29, 2017 at 02:44:33PM +0300, Claudiu Beznea wrote:
> Add specific DTS file and bindings for sama5d27 SoM1 board.
> 
> Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
> Signed-off-by: Cristian Birsan <cristian.birsan@...rochip.com>
> ---
>  arch/arm/boot/dts/at91-sama5d27_som1.dtsi | 178 ++++++++++++++++++++++++++++++
>  1 file changed, 178 insertions(+)
>  create mode 100644 arch/arm/boot/dts/at91-sama5d27_som1.dtsi
> 
> diff --git a/arch/arm/boot/dts/at91-sama5d27_som1.dtsi b/arch/arm/boot/dts/at91-sama5d27_som1.dtsi
> new file mode 100644
> index 0000000..b3af4d4
> --- /dev/null
> +++ b/arch/arm/boot/dts/at91-sama5d27_som1.dtsi
> @@ -0,0 +1,178 @@
> +/*
> + * at91-sama5d27_som1.dtsi - Device Tree file for SAMA5D27 SoM1 board
> + *
> + *  Copyright (c) 2017, Microchip Technology Inc.
> + *                2017 Cristian Birsan <cristian.birsan@...rochip.com>
> + *                2017 Claudiu Beznea <claudiu.beznea@...rochip.com>
> + *
> + * This file is dual-licensed: you can use it either under the terms
> + * of the GPL or the X11 license, at your option. Note that this dual
> + * licensing only applies to this file, and not this project as a
> + * whole.
> + *
> + *  a) This file is free software; you can redistribute it and/or
> + *     modify it under the terms of the GNU General Public License as
> + *     published by the Free Software Foundation; either version 2 of the
> + *     License, or (at your option) any later version.
> + *
> + *     This file is distributed in the hope that it will be useful,
> + *     but WITHOUT ANY WARRANTY; without even the implied warranty of
> + *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + *     GNU General Public License for more details.
> + *
> + * Or, alternatively,
> + *
> + *  b) Permission is hereby granted, free of charge, to any person
> + *     obtaining a copy of this software and associated documentation
> + *     files (the "Software"), to deal in the Software without
> + *     restriction, including without limitation the rights to use,
> + *     copy, modify, merge, publish, distribute, sublicense, and/or
> + *     sell copies of the Software, and to permit persons to whom the
> + *     Software is furnished to do so, subject to the following
> + *     conditions:
> + *
> + *     The above copyright notice and this permission notice shall be
> + *     included in all copies or substantial portions of the Software.
> + *
> + *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> + *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
> + *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
> + *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
> + *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
> + *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> + *     OTHER DEALINGS IN THE SOFTWARE.
> + */
> +#include "sama5d2.dtsi"
> +#include "sama5d2-pinfunc.h"
> +
> +/ {
> +	model = "Atmel SAMA5D27 SoM1";
> +	compatible = "atmel,sama5d27-som1", "atmel,sama5d27", "atmel,sama5d2", "atmel,sama5";
> +
> +	clocks {
> +		slow_xtal {
> +			clock-frequency = <32768>;
> +		};
> +
> +		main_xtal {
> +			clock-frequency = <24000000>;
> +		};
> +	};
> +
> +	ahb {
> +		apb {
> +			qspi1: spi@...24000 {
> +				pinctrl-names = "default";
> +				pinctrl-0 = <&pinctrl_qspi1_default>;
> +				flash@0 {
> +					#address-cells = <1>;
> +					#size-cells = <1>;
> +					compatible = "jedec,spi-nor";
> +					reg = <0>;
> +					spi-max-frequency = <83000000>;
> +					m25p,fast-read;
> +
> +					at91bootstrap@...00000 {
> +						label = "at91bootstrap";
> +						reg = <0x00000000 0x00010000>;
> +					};
> +
> +					bootloaderenv@...10000 {
> +						label = "bootloader env";
> +						reg = <0x00010000 0x00010000>;
> +					};
> +
> +					bootloader@...20000 {
> +						label = "bootloader";
> +						reg = <0x00020000 0x00050000>;
> +					};
> +
> +					dtb@...70000 {
> +						label = "device tree";
> +						reg = <0x00070000 0x00010000>;
> +					};
> +
> +					kernel@...80000 {
> +						label = "kernel";
> +						reg = <0x00080000 0x00380000>;
> +					};

I am wondering if it's a good idea to give the flash map here. If we
take a kernel generated by a sama5_defconfig, it is about 3.8 MB.

> +				};
> +			};
> +
> +			macb0: ethernet@...08000 {
> +				pinctrl-names = "default";
> +				pinctrl-0 = <&pinctrl_macb0_default>;
> +				phy-mode = "rmii";
> +
> +				ethernet-phy@1 {
> +					reg = <0x1>;
> +					interrupt-parent = <&pioA>;
> +					interrupts = <73 IRQ_TYPE_LEVEL_LOW>;

Are you sure about this value? pinctrl tells PD31 so 127. By the way, it
is better to use macros: PIN_PD31.

Regards

Ludovic

> +					pinctrl-names = "default";
> +					pinctrl-0 = <&pinctrl_macb0_phy_irq>;
> +				};
> +			};
> +
> +			i2c0: i2c@...28000 {
> +				dmas = <0>, <0>;
> +				pinctrl-names = "default";
> +				pinctrl-0 = <&pinctrl_i2c0_default>;
> +				i2c-sda-hold-time-ns = <350>;
> +				status = "disabled";
> +
> +				24aa@50 {
> +					compatible = "24mac602";
> +					reg = <0x50>;
> +					pagesize = <8>;
> +					start-offset = /bits/ 8 <0xf8>;
> +					read-only;
> +				};
> +			};
> +
> +			pinctrl@...38000 {
> +
> +				pinctrl_i2c0_default: i2c0_default {
> +					pinmux = <PIN_PD21__TWD0>,
> +						 <PIN_PD22__TWCK0>;
> +					bias-disable;
> +				};
> +
> +				pinctrl_macb0_default: macb0_default {
> +					pinmux = <PIN_PD9__GTXCK>,
> +						 <PIN_PD10__GTXEN>,
> +						 <PIN_PD11__GRXDV>,
> +						 <PIN_PD12__GRXER>,
> +						 <PIN_PD13__GRX0>,
> +						 <PIN_PD14__GRX1>,
> +						 <PIN_PD15__GTX0>,
> +						 <PIN_PD16__GTX1>,
> +						 <PIN_PD17__GMDC>,
> +						 <PIN_PD18__GMDIO>;
> +					bias-disable;
> +				};
> +
> +				pinctrl_macb0_phy_irq: macb0_phy_irq {
> +					pinmux = <PIN_PD31__GPIO>;
> +					bias-disable;
> +				};
> +
> +				pinctrl_qspi1_default: qspi1_default {
> +					sck_cs {
> +						pinmux = <PIN_PB5__QSPI1_SCK>,
> +							 <PIN_PB6__QSPI1_CS>;
> +						bias-disable;
> +					};
> +
> +					data {
> +						pinmux = <PIN_PB7__QSPI1_IO0>,
> +							 <PIN_PB8__QSPI1_IO1>,
> +							 <PIN_PB9__QSPI1_IO2>,
> +							 <PIN_PB10__QSPI1_IO3>;
> +						bias-pull-up;
> +					};
> +				};
> +			};
> +		};
> +	};
> +};
> -- 
> 2.7.4
> 
> 
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