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@xxxxxxxxxxxxxxxx> >> --- >> .../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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