Re: [RFC PATCH v2 1/4] dt-bindings: update the Allwinner GPADC device tree binding for H3

Icenowy Zheng
2017-04-04T15:02:52Z

在 2017年04月04日 22:47, Rob Herring 写道:
> On Sun, Apr 02, 2017 at 09:33:01PM +0800, Icenowy Zheng wrote:
>> Allwinner H3 features a thermal sensor like the one in A33, but has its
>> register re-arranged, the clock divider moved to CCU (originally the
>> clock divider is in ADC) and added a pair of bus clock and reset.
>>
>> Update the binding document to cover H3.
>>
>> Signed-off-by: Icenowy Zheng <icenowy-h8G6r0blFSE@public.gmane.org>
>> ---
>> .../devicetree/bindings/mfd/sun4i-gpadc.txt | 23 ++++++++++++++++++++--
>> 1 file changed, 21 insertions(+), 2 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/mfd/sun4i-gpadc.txt b/Documentation/devicetree/bindings/mfd/sun4i-gpadc.txt
>> index badff3611a98..7753133ca0ff 100644
>> --- a/Documentation/devicetree/bindings/mfd/sun4i-gpadc.txt
>> +++ b/Documentation/devicetree/bindings/mfd/sun4i-gpadc.txt
>> @@ -4,12 +4,20 @@ The Allwinner SoCs all have an ADC that can also act as a thermal sensor
>> and sometimes as a touchscreen controller.
>>
>> Required properties:
>> - - compatible: "allwinner,sun8i-a33-ths",
>> + - compatible: must contain one of the following compatibles:
>> + - "allwinner,sun8i-a33-ths"
>> + - "allwinner,sun8i-h3-ths"
>> - reg: mmio address range of the chip,
>> - #thermal-sensor-cells: shall be 0,
>> - #io-channel-cells: shall be 0,
>>
>> -Example:
>> +Required properties for the following compatibles:
>> + - "allwinner,sun8i-h3-ths"
>> + - clocks: the bus clock and the input clock of the ADC,
>> + - clock-names: should be "bus" and "ths",
>> + - resets: the bus reset of the ADC,
>> +
>> +Example for A33:
>> ths: ths@01c25000 {
>> compatible = "allwinner,sun8i-a33-ths";
>> reg = <0x01c25000 0x100>;
>> @@ -17,6 +25,17 @@ Example:
>> #io-channel-cells = <0>;
>> };
>>
>> +Example for H3:
>> + ths: ths@01c25000 {
>
> adc@...

It's a thermal sensor, so I think call it THS is more appropriate
here. It's implemented as an ADC driver just because the internal
code reusing of Linux. From device tree binding view I choose to
call it ths.

>
> And drop the leading 0.

OK.

>
>> + compatible = "allwinner,sun8i-h3-ths";
>> + reg = <0x01c25000 0x100>;
>> + clocks = <&ccu CLK_BUS_THS>, <&ccu CLK_THS>;
>> + clock-names = "bus", "ths";
>> + resets = <&ccu RST_BUS_THS>;
>> + #thermal-sensor-cells = <0>;
>> + #io-channel-cells = <0>;
>> + };
>> +
>> sun4i, sun5i and sun6i SoCs are also supported via the older binding:
>>
>> sun4i resistive touchscreen controller
>> --
>> 2.12.2
>>
>>
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>
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