[rtc-linux] Re: [PATCH 2/2] doc: dt: add documentation for alphascale,asm9260-rtc

[Oleksij Rempel <linux@rempel-privat.de>]

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Am 01.02.2016 um 16:27 schrieb Rob Herring:
> On Fri, Jan 29, 2016 at 09:40:02AM +0100, Oleksij Rempel wrote:
>> Document Alphascale asm9260 RTC bindings
>>
>> Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
>> ---
>>  .../bindings/rtc/alphascale,asm9260-rtc.txt        | 25 ++++++++++++++++++++++
>>  1 file changed, 25 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/rtc/alphascale,asm9260-rtc.txt
>>
>> diff --git a/Documentation/devicetree/bindings/rtc/alphascale,asm9260-rtc.txt b/Documentation/devicetree/bindings/rtc/alphascale,asm9260-rtc.txt
>> new file mode 100644
>> index 0000000..2c0ff3c
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/rtc/alphascale,asm9260-rtc.txt
>> @@ -0,0 +1,25 @@
>> +* Alphascale asm9260 SoC Real Time Clock
>> +
>> +Required properties:
>> +- compatible: Should be "alphascale,asm9260-rtc"
>> +- reg: Physical base address of the controller and length
>> +       of memory mapped region.
>> +- interrupts: IRQ line for the RTC.
>> +- clocks: Reference to the clock entry.
>> +- clock-names: should contain:
>> +  * "ahb" for the SoC RTC clock
>> +
>> +Optional:
>> +- calibration: calibration value for 1 sec period.
>> +		Max value for forward calibration is 0x1ffff (131071),
>> +		Min value for backward calibration is 0xfffe0001 (-131071).
> 
> This should be prefixed with 'alphascale,'

ok,

> How is this value determined?

To each second the counter value will be increased to decreased by
calibration value - if google translated it correctly from chinese :)

It is RAW value which will be written to register. Since DT compiler do
not support signed values i converted it to HEX.

-- 
Regards,
Oleksij

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