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Date:	Fri, 19 Sep 2014 14:27:12 +0200
From:	Nicolas Ferre <nicolas.ferre@...el.com>
To:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
CC:	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, Josh Wu <josh.wu@...el.com>
Subject: Re: [PATCHv3 5/7] ARM: at91: dt: add device tree file for SAMA5D4ek
 board

On 15/09/2014 18:15, Alexandre Belloni :
> From: Nicolas Ferre <nicolas.ferre@...el.com>
> 
> Add reference SAMA5D4-EK platform DT file.
> 
> Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>
> Signed-off-by: Josh Wu <josh.wu@...el.com>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
> ---
>  arch/arm/boot/dts/Makefile           |   2 +
>  arch/arm/boot/dts/at91-sama5d4ek.dts | 308 +++++++++++++++++++++++++++++++++++
>  2 files changed, 310 insertions(+)
>  create mode 100644 arch/arm/boot/dts/at91-sama5d4ek.dts
> 
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index 75c7b7425c79..a7df6aeb5a1a 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -48,6 +48,8 @@ dtb-$(CONFIG_ARCH_AT91)	+= sama5d33ek.dtb
>  dtb-$(CONFIG_ARCH_AT91)	+= sama5d34ek.dtb
>  dtb-$(CONFIG_ARCH_AT91)	+= sama5d35ek.dtb
>  dtb-$(CONFIG_ARCH_AT91)	+= sama5d36ek.dtb
> +# sama5d4
> +dtb-$(CONFIG_ARCH_AT91)	+= at91-sama5d4ek.dtb
>  
>  dtb-$(CONFIG_ARCH_ATLAS6) += atlas6-evb.dtb
>  dtb-$(CONFIG_ARCH_AXXIA) += axm5516-amarillo.dtb
> diff --git a/arch/arm/boot/dts/at91-sama5d4ek.dts b/arch/arm/boot/dts/at91-sama5d4ek.dts
> new file mode 100644
> index 000000000000..aa01c2610c6d
> --- /dev/null
> +++ b/arch/arm/boot/dts/at91-sama5d4ek.dts
> @@ -0,0 +1,308 @@
> +/*
> + * sama5d4ek.dts - Device Tree file for SAMA5D4 Evaluation Kit
> + *
> + *  Copyright (C) 2014 Atmel,
> + *                2014 Nicolas Ferre <nicolas.ferre@...el.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 library 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 library 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.
> + */
> +/dts-v1/;
> +#include "sama5d4.dtsi"
> +
> +/ {
> +	model = "Atmel SAMA5D4-EK";
> +	compatible = "atmel,sama5d4ek", "atmel,sama5d4", "atmel,sama5";
> +
> +	chosen {
> +		bootargs = "console=ttyS0,115200 ignore_loglevel earlyprintk";
> +	};
> +
> +	memory {
> +		reg = <0x20000000 0x20000000>;
> +	};
> +
> +	clocks {
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		ranges;
> +
> +		main_clock: clock@0 {
> +			compatible = "atmel,osc", "fixed-clock";
> +			clock-frequency = <12000000>;
> +		};
> +
> +		slow_xtal {
> +			clock-frequency = <32768>;
> +		};
> +
> +		main_xtal {
> +			clock-frequency = <12000000>;
> +		};
> +	};
> +
> +	ahb {
> +		apb {
> +			lcd_bus@...00000 {
> +				status = "okay";
> +
> +				lcd@...00000 {
> +					status = "okay";
> +				};
> +
> +				lcdovl1@...00140 {
> +					status = "okay";
> +				};
> +
> +				lcdovl2@...00240 {
> +					status = "okay";
> +				};
> +
> +				lcdheo1@...00340 {
> +					status = "okay";
> +				};
> +			};
> +
> +			adc0: adc@...34000 {
> +				/* The vref depends on JP22 of EK. If connect 1-2 then use 3.3V. connect 2-3 use 3.0V */
> +				atmel,adc-vref = <3300>;
> +				/*atmel,adc-ts-wires = <4>;*/	/* Set up ADC touch screen */
> +				status = "okay";		/* Enable ADC IIO support */
> +			};
> +
> +			mmc0: mmc@...00000 {
> +				pinctrl-names = "default";
> +				pinctrl-0 = <&pinctrl_mmc0_clk_cmd_dat0 &pinctrl_mmc0_dat1_3 &pinctrl_mmc0_cd>;
> +				slot@1 {
> +					reg = <1>;
> +					bus-width = <4>;
> +					cd-gpios = <&pioE 5 0>;
> +				};
> +			};
> +
> +			spi0: spi@...10000 {
> +				cs-gpios = <&pioC 3 0>, <0>, <0>, <0>;
> +				status = "okay";
> +				m25p80@0 {
> +					compatible = "atmel,at25df321a";
> +					spi-max-frequency = <50000000>;
> +					reg = <0>;
> +				};
> +			};
> +
> +			i2c0: i2c@...14000 {
> +				status = "okay";
> +				pmic: act8865@5b {
> +					compatible = "active-semi,act8865";

I remove the PMIC entry here because of the issues with this component
i2c handling. More details at:
http://www.active-semi.com/sheets/ACT8865_Datasheet.pdf

The solution is to enable the desired regulators in the bootloader and
then shut down the i2c interface completely.

I'll do it while integrating the patch in my PR: no need to re-send.

Thanks, bye.

> +					reg = <0x5b>;
> +					status = "okay";
> +
> +					regulators {
> +						vcc_1v8_reg: DCDC_REG1 {
> +							regulator-name = "VCC_1V8";
> +							regulator-min-microvolt = <1800000>;
> +							regulator-max-microvolt = <1800000>;
> +							regulator-always-on;
> +						};
> +
> +						vcc_1v2_reg: DCDC_REG2 {
> +							regulator-name = "1V2_HDMI";
> +							regulator-min-microvolt = <1200000>;
> +							regulator-max-microvolt = <1200000>;
> +							regulator-always-on;
> +						};
> +
> +						vcc_3v3_reg: DCDC_REG3 {
> +							regulator-name = "VCC_3V3";
> +							regulator-min-microvolt = <3300000>;
> +							regulator-max-microvolt = <3300000>;
> +							regulator-always-on;
> +						};
> +
> +						vdd_2v5_reg: LDO_REG1 {
> +							regulator-name = "FUSE_2V5";
> +							regulator-min-microvolt = <2500000>;
> +							regulator-max-microvolt = <2500000>;
> +						};
> +
> +						vdd_3v3_reg: LDO_REG2 {
> +							regulator-name = "VDDANA";
> +							regulator-min-microvolt = <3300000>;
> +							regulator-max-microvolt = <3300000>;
> +							regulator-always-on;
> +						};
> +
> +						vdd_1v8_reg: LDO_REG3 {
> +							regulator-name = "1V8_AUDIO";
> +							regulator-min-microvolt = <1800000>;
> +							regulator-max-microvolt = <1800000>;
> +							regulator-always-on;
> +						};
> +					};
> +				};
> +			};
> +
> +			macb0: ethernet@...20000 {
> +				phy-mode = "rmii";
> +				status = "okay";
> +			};
> +
> +			mmc1: mmc@...00000 {
> +				pinctrl-names = "default";
> +				pinctrl-0 = <&pinctrl_mmc1_clk_cmd_dat0 &pinctrl_mmc1_dat1_3 &pinctrl_mmc1_cd>;
> +				status = "okay";
> +				slot@0 {
> +					reg = <0>;
> +					bus-width = <4>;
> +					cd-gpios = <&pioE 6 0>;
> +				};
> +			};
> +
> +			usart2: serial@...08000 {
> +				status = "okay";
> +			};
> +
> +			usart3: serial@...0c000 {
> +				status = "okay";
> +			};
> +
> +			usart4: serial@...10000 {
> +				status = "okay";
> +			};
> +
> +			watchdog@...68640 {
> +				status = "okay";
> +			};
> +
> +			pinctrl@...6a000 {
> +				board {
> +					pinctrl_mmc0_cd: mmc0_cd {
> +						atmel,pins =
> +							<AT91_PIOE 5 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP_DEGLITCH>;
> +					};
> +					pinctrl_mmc1_cd: mmc1_cd {
> +						atmel,pins =
> +							<AT91_PIOE 6 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP_DEGLITCH>;
> +					};
> +					pinctrl_usba_vbus: usba_vbus {
> +						atmel,pins =
> +							<AT91_PIOE 31 AT91_PERIPH_GPIO AT91_PINCTRL_DEGLITCH>;
> +					};
> +					pinctrl_key_gpio: key_gpio_0 {
> +						atmel,pins =
> +							<AT91_PIOE 13 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP_DEGLITCH>; /* PE13 gpio */
> +					};
> +				};
> +			};
> +		};
> +
> +		usb0: gadget@...00000 {
> +			atmel,vbus-gpio = <&pioE 31 GPIO_ACTIVE_HIGH>;
> +			pinctrl-names = "default";
> +			pinctrl-0 = <&pinctrl_usba_vbus>;
> +			status = "okay";
> +		};
> +
> +		usb1: ohci@...00000 {
> +			num-ports = <3>;
> +			atmel,vbus-gpio = <0 /* &pioE 10 GPIO_ACTIVE_LOW */
> +					   &pioE 11 GPIO_ACTIVE_LOW
> +					   &pioE 12 GPIO_ACTIVE_LOW
> +					  >;
> +			status = "okay";
> +		};
> +
> +		usb2: ehci@...00000 {
> +			status = "okay";
> +		};
> +
> +		nand0: nand@...00000 {
> +			nand-bus-width = <8>;
> +			nand-ecc-mode = "hw";
> +			nand-on-flash-bbt;
> +			atmel,has-pmecc;
> +			status = "okay";
> +
> +			at91bootstrap@0 {
> +				label = "at91bootstrap";
> +				reg = <0x0 0x40000>;
> +			};
> +
> +			bootloader@...00 {
> +				label = "bootloader";
> +				reg = <0x40000 0x80000>;
> +			};
> +
> +			bootloaderenv@...00 {
> +				label = "bootloader env";
> +				reg = <0xc0000 0xc0000>;
> +			};
> +
> +			dtb@...000 {
> +				label = "device tree";
> +				reg = <0x180000 0x80000>;
> +			};
> +
> +			kernel@...000 {
> +				label = "kernel";
> +				reg = <0x200000 0x600000>;
> +			};
> +
> +			rootfs@...000 {
> +				label = "rootfs";
> +				reg = <0x800000 0x0f800000>;
> +			};
> +		};
> +	};
> +
> +	gpio_keys {
> +		compatible = "gpio-keys";
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_key_gpio>;
> +
> +		pb_user1 {
> +			label = "pb_user1";
> +			gpios = <&pioE 13 GPIO_ACTIVE_HIGH>;
> +			linux,code = <0x100>;
> +			gpio-key,wakeup;
> +		};
> +	};
> +};
> 


-- 
Nicolas Ferre
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