linux-kernel - Re: [PATCH v2 2/3] ARM: dts: sun8i: Add Allwinner A83T dtsi

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Date:	Sun, 25 Oct 2015 21:20:12 +0100
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Vishnu Patekar <vishnupatekar0510@...il.com>
Cc:	robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	linux@....linux.org.uk, emilio@...pez.com.ar,
	linus.walleij@...aro.org, jenskuske@...il.com, hdegoede@...hat.com,
	wens@...e.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-sunxi@...glegroups.com, linux-gpio@...r.kernel.org
Subject: Re: [PATCH v2 2/3] ARM: dts: sun8i: Add Allwinner A83T dtsi

Hi,

On Fri, Oct 23, 2015 at 07:46:16AM +0800, Vishnu Patekar wrote:
> +	memory {
> +		reg = <0x40000000 0x80000000>;
> +	};
> +
> +	timer {
> +		compatible = "arm,armv7-timer";
> +		interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> +			     <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> +			     <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> +			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;

Shouldn't the number of CPUs be 8?

> +		clock-frequency = <24000000>;
> +		arm,cpu-registers-not-fw-configured;
> +	};

Is there some u-boot support for this SoC yet?

If so, both the memory node and the clock-frequency and
arm,cpu-registers-not-fw-configured properties are useless (and
harmful for the latter).

> +	soc@...00000 {

Please remove the address. It's both wrong and useless.

> +		compatible = "simple-bus";
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		ranges;
> +
> +		gic: interrupt-controller@...81000 {
> +			compatible = "arm,cortex-a7-gic", "arm,cortex-a15-gic";
> +			reg = <0x01c81000 0x1000>,
> +			      <0x01c82000 0x1000>,
> +			      <0x01c84000 0x2000>,
> +			      <0x01c86000 0x2000>;
> +			interrupt-controller;
> +			#interrupt-cells = <3>;
> +			interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
> +		};
> +
> +		pio: pinctrl@...20800 {
> +			compatible = "allwinner,sun8i-a83t-pinctrl";
> +			interrupts = <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>,
> +			<GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>,
> +			<GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>;

Please align these lines with the first one, like you did for the
GIC's reg for example.

> +			reg = <0x01c20800 0x400>;
> +			clocks = <&osc24M>;
> +			gpio-controller;
> +			interrupt-controller;
> +			#interrupt-cells = <3>;
> +			#gpio-cells = <3>;
> +
> +			i2c0_pins_a: i2c0@0 {
> +				allwinner,pins = "PH0", "PH1";
> +				allwinner,function = "i2c0";
> +				allwinner,drive = <SUN4I_PINCTRL_10_MA>;
> +				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> +			};
> +
> +			i2c1_pins_a: i2c1@0 {
> +				allwinner,pins = "PH2", "PH3";
> +				allwinner,function = "i2c1";
> +				allwinner,drive = <SUN4I_PINCTRL_10_MA>;
> +				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> +			};
> +
> +			i2c2_pins_a: i2c2@0 {
> +				allwinner,pins = "PH4", "PH5";
> +				allwinner,function = "i2c2";
> +				allwinner,drive = <SUN4I_PINCTRL_10_MA>;
> +				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> +			};
> +
> +			mmc0_pins_a: mmc0@0 {
> +				allwinner,pins = "PF0", "PF1", "PF2",
> +						 "PF3", "PF4", "PF5";
> +				allwinner,function = "mmc0";
> +				allwinner,drive = <SUN4I_PINCTRL_30_MA>;
> +				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> +			};
> +
> +			mmc1_pins_a: mmc1@0 {
> +				allwinner,pins = "PG0", "PG1", "PG2",
> +						 "PG3", "PG4", "PG5";
> +				allwinner,function = "mmc1";
> +				allwinner,drive = <SUN4I_PINCTRL_30_MA>;
> +				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> +			};
> +
> +			mmc2_8bit_pins: mmc2_8bit {
> +				allwinner,pins = "PC5", "PC6", "PC8",
> +						 "PC9", "PC10", "PC11",
> +						 "PC12", "PC13", "PC14",
> +						 "PC15";
> +				allwinner,function = "mmc2";
> +				allwinner,drive = <SUN4I_PINCTRL_30_MA>;
> +				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> +			};
> +
> +			uart0_pins_a: uart0@0 {
> +				allwinner,pins = "PF2", "PF4";
> +				allwinner,function = "uart0";
> +				allwinner,drive = <SUN4I_PINCTRL_10_MA>;
> +				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> +			};
> +
> +			uart0_pins_b: uart0@1 {
> +				allwinner,pins = "PB9", "PB10";
> +				allwinner,function = "uart0";
> +				allwinner,drive = <SUN4I_PINCTRL_10_MA>;
> +				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> +			};

Are you going to use all these options?

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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