Re: [PATCH 3/4] ARM: dts: sun8i: Add Allwinner A83T dtsi

[Chen-Yu Tsai <wens@csie.org>]

On Tue, Sep 22, 2015 at 11:54 PM, Maxime Ripard
<maxime.ripard@free-electrons.com> wrote:
> On Tue, Sep 22, 2015 at 11:38:56PM +0800, Vishnu Patekar wrote:
>> Allwinner A83T is new octa-core cortex-a7 SOC.
>> This adds the basic dtsi, the clocks differs from
>> earlier sun8i SOCs.
>>
>> Signed-off-by: Vishnu Patekar <vishnupatekar0510@gmail.com>
>> ---
>>  arch/arm/boot/dts/sun8i-a83t.dtsi | 243 ++++++++++++++++++++++++++++++++++++++
>>  1 file changed, 243 insertions(+)
>>  create mode 100644 arch/arm/boot/dts/sun8i-a83t.dtsi
>>
>> diff --git a/arch/arm/boot/dts/sun8i-a83t.dtsi b/arch/arm/boot/dts/sun8i-a83t.dtsi
>> new file mode 100644
>> index 0000000..f6ddd9c
>> --- /dev/null
>> +++ b/arch/arm/boot/dts/sun8i-a83t.dtsi
>> @@ -0,0 +1,243 @@
>> +/*
>> + * Copyright 2015 Vishnu Patekar
>> + *
>> + * Vishnu Patekar <vishnupatekar0510@gmail.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 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 "skeleton.dtsi"
>> +
>> +#include <dt-bindings/interrupt-controller/arm-gic.h>
>> +
>> +#include <dt-bindings/pinctrl/sun4i-a10.h>
>> +
>> +/ {
>> +     interrupt-parent = <&gic>;
>> +
>> +     chosen {
>> +             #address-cells = <1>;
>> +             #size-cells = <1>;
>> +             ranges;
>> +     };
>> +
>> +     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>;
>> +             };
>> +             cpu@4 {
>> +                     compatible = "arm,cortex-a7";
>> +                     device_type = "cpu";
>> +                     reg = <4>;

These don't look right. See Documentation/devicetree/bindings/arm/cpus.txt
Cluster 1 would be 0x100 ~ 0x103.

>> +             };
>> +
>> +             cpu@5 {
>> +                     compatible = "arm,cortex-a7";
>> +                     device_type = "cpu";
>> +                     reg = <5>;
>> +             };
>> +             cpu@6 {
>> +                     compatible = "arm,cortex-a7";
>> +                     device_type = "cpu";
>> +                     reg = <6>;
>> +             };
>> +
>> +             cpu@7 {
>> +                     compatible = "arm,cortex-a7";
>> +                     device_type = "cpu";
>> +                     reg = <7>;
>> +             };
>> +     };
>> +
>> +     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)>;
>> +             clock-frequency = <24000000>;
>> +             arm,cpu-registers-not-fw-configured;
>> +     };
>> +
>> +     clocks {
>> +             #address-cells = <1>;
>> +             #size-cells = <1>;
>> +             ranges;
>> +
>> +             osc24M: osc24M_clk {
>> +                     #clock-cells = <0>;
>> +                     compatible = "fixed-clock";
>> +                     clock-frequency = <24000000>;
>> +                     clock-output-names = "osc24M";
>> +             };
>> +
>> +             osc32k: osc32k_clk {
>> +                     #clock-cells = <0>;
>> +                     compatible = "fixed-clock";
>> +                     clock-frequency = <32768>;
>> +                     clock-output-names = "osc32k";
>> +             };
>> +     };
>> +
>> +     soc@01c00000 {
>> +             compatible = "simple-bus";
>> +             #address-cells = <1>;
>> +             #size-cells = <1>;
>> +             ranges;
>> +
>> +             pio: pinctrl@01c20800 {
>> +                     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>;
>> +                     /* compatible gets set in SoC specific dtsi file */
>
> Which DTSI?
>
>> +                     reg = <0x01c20800 0x400>;
>> +                     /* interrupts get set in SoC specific dtsi file */
>
> Ditto
>
>> +                     clocks = <&osc24M>;
>> +                     gpio-controller;
>> +                     interrupt-controller;
>> +                     #interrupt-cells = <3>;
>> +                     #gpio-cells = <3>;
>> +
>> +                     uart0_pins_a: uart0@0 {
>> +                             allwinner,pins = "PF2", "PF4";
>> +                             allwinner,function = "uart0";
>> +                             allwinner,drive = <SUN4I_PINCTRL_10_MA>;
>> +                             allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
>> +                     };

Could you use PB9 & PB10 for uart0 pins, and not the PF ones?

http://linux-sunxi.org/User:Simos/H8HomletProtoV20_A83T shows
they are available on the headers, and I tested them before.

Thanks!
ChenYu

>> +
>> +                     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";

Would we also want PC16 (SDC2_RST)?

>> +                             allwinner,function = "mmc2";
>> +                             allwinner,drive = <SUN4I_PINCTRL_30_MA>;
>> +                             allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
>> +                     };
>> +
>> +                     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>;
>> +                     };
>
> Please order those by alphabetical order.
>
>> +             };
>> +
>> +             uart0: serial@01c28000 {
>> +                     compatible = "snps,dw-apb-uart";
>> +                     reg = <0x01c28000 0x400>;
>> +                     interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>;
>> +                     reg-shift = <2>;
>> +                     reg-io-width = <4>;
>> +                     clocks = <&osc24M>;
>> +                     status = "disabled";
>> +             };
>> +
>> +             gic: interrupt-controller@01c81000 {
>> +                     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)>;
>> +             };
>> +
>> +     };
>> +};
>> --
>> 1.9.1
>>
>
> Thanks!
> Maxime
>
> --
> Maxime Ripard, Free Electrons
> Embedded Linux, Kernel and Android engineering
> http://free-electrons.com