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Date: Mon, 29 May 2017 16:15:16 +0800
From: Chen-Yu Tsai <wens@...e.org>
To: Icenowy Zheng <icenowy@...c.io>
Cc: Maxime Ripard <maxime.ripard@...e-electrons.com>,
Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
Linus Walleij <linus.walleij@...aro.org>,
"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
linux-kernel <linux-kernel@...r.kernel.org>,
devicetree <devicetree@...r.kernel.org>,
linux-clk <linux-clk@...r.kernel.org>,
"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>
Subject: Re: [PATCH v3 09/10] ARM: dts: sun8i: Add basic dtsi file for
Allwinner R40
Hi,
On Sat, May 27, 2017 at 6:23 PM, Icenowy Zheng <icenowy@...c.io> 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>
> ---
> Changes in v3:
> - Pinmux changes.
>
> arch/arm/boot/dts/sun8i-r40.dtsi | 408 +++++++++++++++++++++++++++++++++++++++
> 1 file changed, 408 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..1d36485c6ef7
> --- /dev/null
> +++ b/arch/arm/boot/dts/sun8i-r40.dtsi
> @@ -0,0 +1,408 @@
> +/*
> + * 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>;
> +
> + aliases {
> + };
> +
> + chosen {
> + };
> +
> + clocks {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + ranges;
> +
> + osc24M: osc24M {
> + #clock-cells = <0>;
> + compatible = "fixed-clock";
> + clock-frequency = <24000000>;
Please add the accuracy of the oscillator. Allwinner requires it
to be within +/- 50 ppm for this one.
> + };
> +
> + osc32k: osc32k {
> + #clock-cells = <0>;
> + compatible = "fixed-clock";
> + clock-frequency = <32768>;
And +/- 20 ppm for this one.
> + 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>;
> + };
> + };
> +
> + memory {
> + device_type = "memory";
> + reg = <0x40000000 0x80000000>;
> + };
> +
> + soc@...0000 {
Please drop the @1c00000 part to avoid introducing new warnings.
> + 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>;
> + };
> +
> + mmc0: mmc@...f000 {
> + compatible = "allwinner,sun50i-a64-mmc";
Please add a new R40 specific compatible in front, in case we run into any
SoC specific issues.
> + reg = <0x01c0f000 0x1000>;
> + clocks = <&ccu CLK_BUS_MMC0>, <&ccu CLK_MMC0>;
As a rule of thumb, if you are targeting the same release for merging
both the clock driver and any clock users in the device tree, please split
the device tree into two patches, the first using raw numbers, and the
second converting the raw numbers into macros from the device tree binding
headers. This makes it easier for the platform maintainers.
> + 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>;
> + 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>;
> + 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>;
> + 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>;
> + 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";
As mentioned previously by Maxime, the losc clock comes from the RTC
module where it is muxed. The mux is depicted in the clock tree section
of the user manual. Please add the RTC and the internal oscillator.
> + #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 {
Cool!
> + pins = "PG0", "PG1", "PG2",
> + "PG3", "PG4", "PG5";
> + function = "mmc1";
> + drive-strength = <30>;
> + bias-pull-up;
> + };
> +
> + mmc2_pins: mmc2-pins {
Please name this mmc2-emmc-pins, in case someone does a 2-SD-card variant.
> + 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,cortex-a7-gic", "arm,cortex-a15-gic";
Please use "arm,gic-400" instead.
Regards
ChenYu
> + 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)>;
> + clock-frequency = <24000000>;
> + arm,cpu-registers-not-fw-configured;
> + };
> +};
> --
> 2.12.2
>
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