[1/2] ARM: dts: add cubietech cubieboard4

From: Tyler Baker <tyler.baker@linaro.org>

Add a Cubietech Cubieboard4 device tree and instruct make to build it. This
device tree has been derived from the sun9i-a80-optimus.dts as they are very
similar in design[1]. Notably, I2C3 is not used on Cubieboard4 and the LED/PWM
definitions will need to be updated in the future.

[1] http://dl.cubieboard.org/model/cc-a80/Hardware/CC-A80-HW-V1.1.pdf

Signed-off-by: Tyler Baker <tyler.baker@linaro.org>
---
 arch/arm/boot/dts/Makefile                  |   3 +-
 arch/arm/boot/dts/sun9i-a80-cubieboard4.dts | 100 ++++++++++++++++++++++++++++
 2 files changed, 102 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/boot/dts/sun9i-a80-cubieboard4.dts

Hi Maxime,

On 8 March 2015 at 10:28, Maxime Ripard
<maxime.ripard@free-electrons.com> wrote:
> Hi Tyler,
>
> On Fri, Mar 06, 2015 at 03:35:04PM -0800, tyler.baker@linaro.org wrote:
>> From: Tyler Baker <tyler.baker@linaro.org>
>>
>> Add a Cubietech Cubieboard4 device tree and instruct make to build it. This
>> device tree has been derived from the sun9i-a80-optimus.dts as they are very
>> similar in design[1]. Notably, I2C3 is not used on Cubieboard4 and the LED/PWM
>> definitions will need to be updated in the future.
>>
>> [1] http://dl.cubieboard.org/model/cc-a80/Hardware/CC-A80-HW-V1.1.pdf
>>
>> Signed-off-by: Tyler Baker <tyler.baker@linaro.org>
>> ---
>>  arch/arm/boot/dts/Makefile                  |   3 +-
>>  arch/arm/boot/dts/sun9i-a80-cubieboard4.dts | 100 ++++++++++++++++++++++++++++
>>  2 files changed, 102 insertions(+), 1 deletion(-)
>>  create mode 100644 arch/arm/boot/dts/sun9i-a80-cubieboard4.dts
>>
>> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
>> index 4837044..0f67dab 100644
>> --- a/arch/arm/boot/dts/Makefile
>> +++ b/arch/arm/boot/dts/Makefile
>> @@ -553,7 +553,8 @@ dtb-$(CONFIG_MACH_SUN8I) += \
>>       sun8i-a23-ippo-q8h-v5.dtb \
>>       sun8i-a23-ippo-q8h-v1.2.dtb
>>  dtb-$(CONFIG_MACH_SUN9I) += \
>> -     sun9i-a80-optimus.dtb
>> +     sun9i-a80-optimus.dtb \
>> +     sun9i-a80-cubieboard4.dtb
>>  dtb-$(CONFIG_ARCH_TEGRA_2x_SOC) += \
>>       tegra20-harmony.dtb \
>>       tegra20-iris-512.dtb \
>> diff --git a/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts b/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts
>> new file mode 100644
>> index 0000000..b239b39
>> --- /dev/null
>> +++ b/arch/arm/boot/dts/sun9i-a80-cubieboard4.dts
>> @@ -0,0 +1,100 @@
>> +/*
>> + * Copyright 2015 Tyler Baker
>> + *
>> + * Tyler Baker <tyler.baker@linaro.org>
>> + * Chen-Yu Tsai <wens@csie.org>
>> + *
>> + * 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.
>> + */
>> +
>> +/dts-v1/;
>> +#include "sun9i-a80.dtsi"
>> +#include "sunxi-common-regulators.dtsi"
>> +
>> +#include <dt-bindings/gpio/gpio.h>
>> +#include <dt-bindings/pinctrl/sun4i-a10.h>
>> +
>> +/ {
>> +     model = "Cubietech Cubieboard4";
>> +     compatible = "cubietech,a80-cubietruck", "allwinner,sun9i-a80";

I noticed this should not be a80-cubietruck but instead
a80-cubieboard4. Will fix in v1.

>> +
>> +     aliases {
>> +             serial0 = &uart0;
>> +     };
>> +
>> +     chosen {
>> +             bootargs = "earlyprintk console=ttyS0,115200";
>
> It would be great not to use earlyprintk, just in case we have a
> kernel compiled with earlyprintk support, but for another SoC.
>
> And while we're at it, using stdout-path would allow use to get rid of
> the bootargs entirely.

Great suggestion. I've removed the bootargs, added stdout-path, and
have done some testing locally. Working just fine, will be included in
v1.

>
>> +     };
>> +
>> +};
>> +
>> +&pio {
>> +
>
> This new line is not needed.

Ack.

>
>> +     mmc0_cd_pin_cubieboard4: mmc0_cd_pin@0 {
>> +             allwinner,pins = "PH18";
>> +             allwinner,function = "gpio_in";
>> +             allwinner,drive = <SUN4I_PINCTRL_10_MA>;
>> +             allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
>> +     };
>> +};
>> +
>> +&mmc0 {
>> +     pinctrl-names = "default";
>> +     pinctrl-0 = <&mmc0_pins>, <&mmc0_cd_pin_cubieboard4>;
>> +     vmmc-supply = <&reg_vcc3v0>;
>> +     bus-width = <4>;
>> +     cd-gpios = <&pio 7 18 GPIO_ACTIVE_HIGH>; /* PH18 */
>> +     cd-inverted;
>> +     status = "okay";
>> +};
>> +
>> +&mmc2 {
>> +     pinctrl-names = "default";
>> +     pinctrl-0 = <&mmc2_8bit_pins>;
>> +     vmmc-supply = <&reg_vcc3v0>;
>> +     bus-width = <8>;
>> +     non-removable;
>> +     status = "okay";
>> +};
>> +
>> +&uart0 {
>> +     pinctrl-names = "default";
>> +     pinctrl-0 = <&uart0_pins_a>;
>> +     status = "okay";
>> +};
>
> Looks good otherwise, thanks!

Thanks for the review!

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

Tyler
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