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Message-ID: <20170504143112.upqknjei57oaw2w4@lukather>
Date: Thu, 4 May 2017 16:31:12 +0200
From: Maxime Ripard <maxime.ripard@...e-electrons.com>
To: Icenowy Zheng <icenowy@...c.io>
Cc: Rob Herring <robh+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
Linus Walleij <linus.walleij@...aro.org>,
linux-doc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
linux-clk@...r.kernel.org, linux-gpio@...r.kernel.org,
linux-sunxi@...glegroups.com, Icenowy Zheng <icenowy@...c.xyz>
Subject: Re: [PATCH v2 09/10] ARM: dts: sun8i: Add basic dtsi file for
Allwinner R40
On Thu, May 04, 2017 at 09:50:05PM +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.xyz>
> ---
> arch/arm/boot/dts/sun8i-r40.dtsi | 404 +++++++++++++++++++++++++++++++++++++++
> 1 file changed, 404 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..20d4705a8206
> --- /dev/null
> +++ b/arch/arm/boot/dts/sun8i-r40.dtsi
> @@ -0,0 +1,404 @@
> +/*
> + * Copyright 2017 Chen-Yu Tsai <wens@...e.org>
> + * Copyright 2017 Icenowy Zheng <icenowy@...c.xyz>
> + *
> + * 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 {
> + };
These two are probably useless...
> + clocks {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + ranges;
> +
> + osc24M: osc24M {
> + #clock-cells = <0>;
> + compatible = "fixed-clock";
> + clock-frequency = <24000000>;
> + };
> +
> + 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>;
> + };
> + };
> +
> + memory {
> + device_type = "memory";
> + reg = <0x40000000 0x80000000>;
> + };
This one too.
> + soc@...0000 {
> + 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";
> + reg = <0x01c0f000 0x1000>;
> + clocks = <&ccu CLK_BUS_MMC0>, <&ccu CLK_MMC0>;
> + clock-names = "ahb", "mmc";
> + resets = <&ccu RST_BUS_MMC0>;
> + reset-names = "ahb";
> + 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";
> + 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";
This needs a specific compatible.
> + 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>;
Did you actually test those frequencies?
> + 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";
This is very likely to be fed from the RTC.
> + #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";
Here too.
> + gpio-controller;
> + interrupt-controller;
> + #interrupt-cells = <3>;
> + #gpio-cells = <3>;
> +
> + i2c0_pins: twi0@0 {
> + pins = "PB0", "PB1";
> + function = "i2c0";
> + };
> +
> + mmc0_pins: mmc0@0 {
> + pins = "PF0", "PF1", "PF2",
> + "PF3", "PF4", "PF5";
> + function = "mmc0";
> + drive-strength = <30>;
> + bias-pull-up;
> + };
> +
> + mmc1_pins: mmc1@0 {
> + pins = "PG0", "PG1", "PG2",
> + "PG3", "PG4", "PG5";
> + function = "mmc1";
> + drive-strength = <30>;
> + bias-pull-up;
> + };
> +
> + mmc2_pins: mmc2@0 {
> + pins = "PC5", "PC6", "PC7", "PC8", "PC9",
> + "PC10", "PC11", "PC12", "PC13", "PC14",
> + "PC15", "PC24";
> + function = "mmc2";
> + drive-strength = <30>;
> + bias-pull-up;
> + };
This implies an 8 bit bus width, which is not that common, and not
your default in the MMC driver either.
> + uart0_pins_0: uart0@0 {
> + 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";
> + 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;
Is it true? U-boot doesn't setup those already?
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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