Date:   Wed, 23 Aug 2017 08:56:31 +0800
From:   Icenowy Zheng <icenowy@...c.io>
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>
CC:     Chen-Yu Tsai <wens@...e.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH 1/3] ARM: dts: sun8i: Add basic dtsi file for Allwinner R40



于 2017年8月23日 GMT+08:00 上午4:05:21, Maxime Ripard <maxime.ripard@...e-electrons.com> 写到:
>Hi,
>
>On Tue, Aug 22, 2017 at 02:17:40PM +0800, Icenowy Zheng wrote:
>> From: Chen-Yu Tsai <wens@...e.org>
>> 
>> The Allwinner R40 SoC is marketed as the successor to the A20 SoC.
>> The R40 is a smaller chip than the A20, but features the same set
>> of programmable pins, with a couple extra pins and some new pin
>> functions. The chip features 4 Cortex-A7 cores and a Mali-400 MP2
>> GPU. It retains most if not all features from the A20, while adding
>> some new features, such as MIPI DSI output, or updating various
>> hardware blocks, such as DE 2.0.
>> 
>> Signed-off-by: Chen-Yu Tsai <wens@...e.org>
>> Signed-off-by: Icenowy Zheng <icenowy@...c.io>
>
>I'm not sure why you have two series to achieve one thing here. And
>the fact that you don't have a cover letter doesn't make it any
>clearer.
>
>Please make series based on what you're trying to do and not split it
>arbitrarily. And document what you're doing in a cover letter.
>
>> ---
>>  arch/arm/boot/dts/sun8i-r40.dtsi | 396
>+++++++++++++++++++++++++++++++++++++++
>>  1 file changed, 396 insertions(+)
>>  create mode 100644 arch/arm/boot/dts/sun8i-r40.dtsi
>> 
>> diff --git a/arch/arm/boot/dts/sun8i-r40.dtsi
>b/arch/arm/boot/dts/sun8i-r40.dtsi
>> new file mode 100644
>> index 000000000000..5b48801bdd01
>> --- /dev/null
>> +++ b/arch/arm/boot/dts/sun8i-r40.dtsi
>> @@ -0,0 +1,396 @@
>> +/*
>> + * Copyright 2017 Chen-Yu Tsai <wens@...e.org>
>> + * Copyright 2017 Icenowy Zheng <icenowy@...c.io>
>> + *
>> + * 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 <dt-bindings/interrupt-controller/arm-gic.h>
>> +#include <dt-bindings/clock/sun8i-r40-ccu.h>
>> +#include <dt-bindings/reset/sun8i-r40-ccu.h>
>> +
>> +/ {
>> +	#address-cells = <1>;
>> +	#size-cells = <1>;
>> +	interrupt-parent = <&gic>;
>> +
>> +	clocks {
>> +		#address-cells = <1>;
>> +		#size-cells = <1>;
>> +		ranges;
>> +
>> +		osc24M: osc24M {
>> +			#clock-cells = <0>;
>> +			compatible = "fixed-clock";
>> +			clock-frequency = <24000000>;
>> +			clock-output-names = "osc24M";
>> +		};
>> +
>> +		osc32k: osc32k {
>> +			#clock-cells = <0>;
>> +			compatible = "fixed-clock";
>> +			clock-frequency = <32768>;
>> +			clock-output-names = "osc32k";
>> +		};
>> +	};
>> +
>> +	cpus {
>> +		#address-cells = <1>;
>> +		#size-cells = <0>;
>> +
>> +		cpu@0 {
>> +			compatible = "arm,cortex-a7";
>> +			device_type = "cpu";
>> +			reg = <0>;
>> +		};
>> +
>> +		cpu@1 {
>> +			compatible = "arm,cortex-a7";
>> +			device_type = "cpu";
>> +			reg = <1>;
>> +		};
>> +
>> +		cpu@2 {
>> +			compatible = "arm,cortex-a7";
>> +			device_type = "cpu";
>> +			reg = <2>;
>> +		};
>> +
>> +		cpu@3 {
>> +			compatible = "arm,cortex-a7";
>> +			device_type = "cpu";
>> +			reg = <3>;
>> +		};
>> +	};
>> +
>> +	soc {
>> +		compatible = "simple-bus";
>> +		#address-cells = <1>;
>> +		#size-cells = <1>;
>> +		ranges;
>> +
>> +		nmi_intc: interrupt-controller@...0030 {
>> +			compatible = "allwinner,sun7i-a20-sc-nmi";
>> +			interrupt-controller;
>> +			#interrupt-cells = <2>;
>> +			reg = <0x01c00030 0x0c>;
>> +			interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>;
>> +		};
>
>You should use the new compatible here.

It's not the R_INTC, but the same NMI with A20.

R40 has even no R_ peripherals.

>
>> +		mmc0: mmc@...f000 {
>> +			compatible = "allwinner,sun50i-a64-mmc";
>
>Please add a soc specific compatible for all the blocks.
>
>> +			reg = <0x01c0f000 0x1000>;
>> +			clocks = <&ccu CLK_BUS_MMC0>, <&ccu CLK_MMC0>;
>> +			clock-names = "ahb", "mmc";
>> +			resets = <&ccu RST_BUS_MMC0>;
>> +			reset-names = "ahb";
>> +			pinctrl-0 = <&mmc0_pins>;
>> +			pinctrl-names = "default";
>> +			interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
>> +			max-frequency = <150000000>;
>
>have you tested that frequency?

No.

Should I decrease it?

>
>> +			status = "disabled";
>> +			#address-cells = <1>;
>> +			#size-cells = <0>;
>> +		};
>> +
>> +		mmc1: mmc@...0000 {
>> +			compatible = "allwinner,sun50i-a64-mmc";
>> +			reg = <0x01c10000 0x1000>;
>> +			clocks = <&ccu CLK_BUS_MMC1>, <&ccu CLK_MMC1>;
>> +			clock-names = "ahb", "mmc";
>> +			resets = <&ccu RST_BUS_MMC1>;
>> +			reset-names = "ahb";
>> +			interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>;
>> +			max-frequency = <150000000>;
>
>Ditto.
>
>> +			status = "disabled";
>> +			#address-cells = <1>;
>> +			#size-cells = <0>;
>> +		};
>> +
>> +		mmc2: mmc@...1000 {
>> +			compatible = "allwinner,sun50i-a64-emmc";
>> +			reg = <0x01c11000 0x1000>;
>> +			clocks = <&ccu CLK_BUS_MMC2>, <&ccu CLK_MMC2>;
>> +			clock-names = "ahb", "mmc";
>> +			resets = <&ccu RST_BUS_MMC2>;
>> +			reset-names = "ahb";
>> +			pinctrl-0 = <&mmc2_pins>;
>> +			pinctrl-names = "default";
>> +			interrupts = <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
>> +			max-frequency = <200000000>;
>
>Ditto.
>
>> +			status = "disabled";
>> +			#address-cells = <1>;
>> +			#size-cells = <0>;
>> +		};
>> +
>> +		mmc3: mmc@...2000 {
>> +			compatible = "allwinner,sun50i-a64-mmc";
>> +			reg = <0x01c12000 0x1000>;
>> +			clocks = <&ccu CLK_BUS_MMC3>, <&ccu CLK_MMC3>;
>> +			clock-names = "ahb", "mmc";
>> +			resets = <&ccu RST_BUS_MMC3>;
>> +			reset-names = "ahb";
>> +			interrupts = <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>;
>> +			max-frequency = <150000000>;
>
>Ditto.
>
>> +			status = "disabled";
>> +			#address-cells = <1>;
>> +			#size-cells = <0>;
>> +		};
>> +
>> +		ccu: clock@...0000 {
>> +			compatible = "allwinner,sun8i-r40-ccu";
>> +			reg = <0x01c20000 0x400>;
>> +			clocks = <&osc24M>, <&osc32k>;
>> +			clock-names = "hosc", "losc";
>> +			#clock-cells = <1>;
>> +			#reset-cells = <1>;
>> +		};
>> +
>> +		pio: pinctrl@...0800 {
>> +			compatible = "allwinner,sun8i-r40-pinctrl";
>> +			reg = <0x01c20800 0x400>;
>> +			interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>;
>> +			clocks = <&ccu CLK_BUS_PIO>, <&osc24M>, <&osc32k>;
>> +			clock-names = "apb", "hosc", "losc";
>> +			gpio-controller;
>> +			interrupt-controller;
>> +			#interrupt-cells = <3>;
>> +			#gpio-cells = <3>;
>> +
>> +			i2c0_pins: i2c0-pins {
>> +				pins = "PB0", "PB1";
>> +				function = "i2c0";
>> +			};
>> +
>> +			mmc0_pins: mmc0-pins {
>> +				pins = "PF0", "PF1", "PF2",
>> +				       "PF3", "PF4", "PF5";
>> +				function = "mmc0";
>> +				drive-strength = <30>;
>> +				bias-pull-up;
>> +			};
>> +
>> +			mmc1_pg_pins: mmc1-pg-pins {
>> +				pins = "PG0", "PG1", "PG2",
>> +				       "PG3", "PG4", "PG5";
>> +				function = "mmc1";
>> +				drive-strength = <30>;
>> +				bias-pull-up;
>> +			};
>> +
>> +			mmc2_pins: mmc2-pins {
>> +				pins = "PC5", "PC6", "PC7", "PC8", "PC9",
>> +				       "PC10", "PC11", "PC12", "PC13", "PC14",
>> +				       "PC15", "PC24";
>> +				function = "mmc2";
>> +				drive-strength = <30>;
>> +				bias-pull-up;
>> +			};
>> +
>> +			uart0_pb_pins: uart0-pb-pins {
>> +				pins = "PB22", "PB23";
>> +				function = "uart0";
>> +			};
>> +		};
>> +
>> +		uart0: serial@...8000 {
>> +			compatible = "snps,dw-apb-uart";
>> +			reg = <0x01c28000 0x400>;
>> +			interrupts = <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>;
>> +			reg-shift = <2>;
>> +			reg-io-width = <4>;
>> +			clocks = <&ccu CLK_BUS_UART0>;
>> +			resets = <&ccu RST_BUS_UART0>;
>> +			status = "disabled";
>> +		};
>> +
>> +		uart1: serial@...8400 {
>> +			compatible = "snps,dw-apb-uart";
>> +			reg = <0x01c28400 0x400>;
>> +			interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
>> +			reg-shift = <2>;
>> +			reg-io-width = <4>;
>> +			clocks = <&ccu CLK_BUS_UART1>;
>> +			resets = <&ccu RST_BUS_UART1>;
>> +			status = "disabled";
>> +		};
>> +
>> +		uart2: serial@...8800 {
>> +			compatible = "snps,dw-apb-uart";
>> +			reg = <0x01c28800 0x400>;
>> +			interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
>> +			reg-shift = <2>;
>> +			reg-io-width = <4>;
>> +			clocks = <&ccu CLK_BUS_UART2>;
>> +			resets = <&ccu RST_BUS_UART2>;
>> +			status = "disabled";
>> +		};
>> +
>> +		uart3: serial@...8c00 {
>> +			compatible = "snps,dw-apb-uart";
>> +			reg = <0x01c28c00 0x400>;
>> +			interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
>> +			reg-shift = <2>;
>> +			reg-io-width = <4>;
>> +			clocks = <&ccu CLK_BUS_UART3>;
>> +			resets = <&ccu RST_BUS_UART3>;
>> +			status = "disabled";
>> +		};
>> +
>> +		uart4: serial@...9000 {
>> +			compatible = "snps,dw-apb-uart";
>> +			reg = <0x01c29000 0x400>;
>> +			interrupts = <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>;
>> +			reg-shift = <2>;
>> +			reg-io-width = <4>;
>> +			clocks = <&ccu CLK_BUS_UART4>;
>> +			resets = <&ccu RST_BUS_UART4>;
>> +			status = "disabled";
>> +		};
>> +
>> +		uart5: serial@...9400 {
>> +			compatible = "snps,dw-apb-uart";
>> +			reg = <0x01c29400 0x400>;
>> +			interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;
>> +			reg-shift = <2>;
>> +			reg-io-width = <4>;
>> +			clocks = <&ccu CLK_BUS_UART5>;
>> +			resets = <&ccu RST_BUS_UART5>;
>> +			status = "disabled";
>> +		};
>> +
>> +		uart6: serial@...9800 {
>> +			compatible = "snps,dw-apb-uart";
>> +			reg = <0x01c29800 0x400>;
>> +			interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>;
>> +			reg-shift = <2>;
>> +			reg-io-width = <4>;
>> +			clocks = <&ccu CLK_BUS_UART6>;
>> +			resets = <&ccu RST_BUS_UART6>;
>> +			status = "disabled";
>> +		};
>> +
>> +		uart7: serial@...9c00 {
>> +			compatible = "snps,dw-apb-uart";
>> +			reg = <0x01c29c00 0x400>;
>> +			interrupts = <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>;
>> +			reg-shift = <2>;
>> +			reg-io-width = <4>;
>> +			clocks = <&ccu CLK_BUS_UART7>;
>> +			resets = <&ccu RST_BUS_UART7>;
>> +			status = "disabled";
>> +		};
>> +
>> +		i2c0: i2c@...ac00 {
>> +			compatible = "allwinner,sun6i-a31-i2c";
>> +			reg = <0x01c2ac00 0x400>;
>> +			interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
>> +			clocks = <&ccu CLK_BUS_I2C0>;
>> +			resets = <&ccu RST_BUS_I2C0>;
>> +			pinctrl-0 = <&i2c0_pins>;
>> +			pinctrl-names = "default";
>> +			status = "disabled";
>> +			#address-cells = <1>;
>> +			#size-cells = <0>;
>> +		};
>> +
>> +		i2c1: i2c@...b000 {
>> +			compatible = "allwinner,sun6i-a31-i2c";
>> +			reg = <0x01c2b000 0x400>;
>> +			interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
>> +			clocks = <&ccu CLK_BUS_I2C1>;
>> +			resets = <&ccu RST_BUS_I2C1>;
>> +			status = "disabled";
>> +			#address-cells = <1>;
>> +			#size-cells = <0>;
>> +		};
>> +
>> +		i2c2: i2c@...b400 {
>> +			compatible = "allwinner,sun6i-a31-i2c";
>> +			reg = <0x01c2b400 0x400>;
>> +			interrupts = <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
>> +			clocks = <&ccu CLK_BUS_I2C2>;
>> +			resets = <&ccu RST_BUS_I2C2>;
>> +			status = "disabled";
>> +			#address-cells = <1>;
>> +			#size-cells = <0>;
>> +		};
>> +
>> +		i2c3: i2c@...b800 {
>> +			compatible = "allwinner,sun6i-a31-i2c";
>> +			reg = <0x01c2b800 0x400>;
>> +			interrupts = <GIC_SPI 88 IRQ_TYPE_LEVEL_HIGH>;
>> +			clocks = <&ccu CLK_BUS_I2C3>;
>> +			resets = <&ccu RST_BUS_I2C3>;
>> +			status = "disabled";
>> +			#address-cells = <1>;
>> +			#size-cells = <0>;
>> +		};
>> +
>> +		i2c4: i2c@...c000 {
>> +			compatible = "allwinner,sun6i-a31-i2c";
>> +			reg = <0x01c2c000 0x400>;
>> +			interrupts = <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>;
>> +			clocks = <&ccu CLK_BUS_I2C4>;
>> +			resets = <&ccu RST_BUS_I2C4>;
>> +			status = "disabled";
>> +			#address-cells = <1>;
>> +			#size-cells = <0>;
>> +		};
>> +
>> +		gic: interrupt-controller@...1000 {
>> +			compatible = "arm,gic-400";
>> +			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)>;
>> +		};
>> +	};
>> +
>> +	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)>;
>
>Those masks are wrong.
>
>Maxime

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