[PATCH v4] ARM: dts: sun8i: Add dts file for Olimex A33-OLinuXino

[Icenowy Zheng]

26.07.2016, 23:38, "Maxime Ripard" <maxime.ripard at free-electrons.com>:
> Hi Stefan,
>
> On Mon, Jul 25, 2016 at 03:37:23PM +0300, Stefan Mavrodiev wrote:
>>  A33-OLinuXino is A33 development board designed by Olimex LTD.
>>
>>  It has AXP233 PMU, 1GB DRAM, a micro SD card, one USB-OTG connector,
>>  headphone and mic jacks, connector for LiPo battery and optional
>>  4GB NAND Flash.
>>
>>  It has two 40-pin headers. One for LCD panel, and one for
>>  additional modules. Also there is CSI/DSI connector.
>>
>>  Signed-off-by: Stefan Mavrodiev <stefan.mavrodiev at gmail.com>
>
> It looks mostly good, a few comments though.
>>  +&pio {
>>  + led_pin_olinuxino: led_pins at 0 {
>>  + allwinner,pins = "PB7";
>>  + allwinner,function = "gpio_out";
>
> This line is not properly indented.
>
>>  + allwinner,drive = <SUN4I_PINCTRL_10_MA>;
>>  + allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
>>  + };
>
> And this one too.
>
>>  +&reg_dc1sw {
>>  + regulator-name = "vcc-lcd";
>>  +};
>
> No constraints on this one?
The "regulator" dc1sw is, in fact, a switch (so it's named as "sw").
So it have only on-off status.

The constraints in dc1sw has prevented one of my A31s tablet from booting
when it's not removed.
>
>>  +&reg_dcdc1 {
>>  + regulator-always-on;
>>  + regulator-min-microvolt = <3300000>;
>>  + regulator-max-microvolt = <3300000>;
>>  + regulator-name = "vcc-dsi";
>>  +};
>
> What is it used for? Is it really necessary to keep it on at all time?
>
> Thanks,
> Maxime
>
> --
> Maxime Ripard, Free Electrons
> Embedded Linux and Kernel engineering
> http://free-electrons.com
> ,
>
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