On 19/01/2022 03:12, Rob Herring wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > On Mon, Jan 17, 2022 at 11:07:45AM +0000, conor.dooley@xxxxxxxxxxxxx wrote: >> From: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> >> >> Add device tree bindings for the real time clock on >> the Microchip PolarFire SoC. >> >> Signed-off-by: Daire McNamara <daire.mcnamara@xxxxxxxxxxxxx> >> Signed-off-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> >> --- >> .../bindings/rtc/microchip,mfps-rtc.yaml | 63 +++++++++++++++++++ >> 1 file changed, 63 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/rtc/microchip,mfps-rtc.yaml >> >> diff --git a/Documentation/devicetree/bindings/rtc/microchip,mfps-rtc.yaml b/Documentation/devicetree/bindings/rtc/microchip,mfps-rtc.yaml >> new file mode 100644 >> index 000000000000..d57460cbe5e3 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/rtc/microchip,mfps-rtc.yaml >> @@ -0,0 +1,63 @@ >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/rtc/microchip,mfps-rtc.yaml# >> + >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: Microchip PolarFire Soc (MPFS) RTC Device Tree Bindings >> + >> +allOf: >> + - $ref: rtc.yaml# >> + >> +maintainers: >> + - Daire McNamara <daire.mcnamara@xxxxxxxxxxxxx> >> + - Lewis Hanly <lewis.hanly@xxxxxxxxxxxxx> >> + >> +properties: >> + compatible: >> + enum: >> + - microchip,mpfs-rtc >> + >> + reg: >> + maxItems: 1 >> + >> + interrupts: >> + maxItems: 2 > > Need to define what each one is. Sure. > >> + >> + microchip,prescaler: >> + description: | >> + The prescaler divides the input frequency to create a time-based strobe (typically 1 Hz) for >> + the calendar counter. The Alarm and Compare Registers, in conjunction with the calendar >> + counter, facilitate time-matched events. To properly operate in Calendar or Binary mode, >> + the 26-bit prescaler must be programmed to generate a strobe to the RTC. >> + maxItems: 1 >> + $ref: /schemas/types.yaml#/definitions/uint32 > > Can't you calculate this based on the clock input freq? I mistakenly thought this was set when the bitstream was programmed to the FPGA but it is just an APB register & should be calculated. I'll drop the property. > >> + >> + clocks: >> + maxItems: 1 >> + >> + clock-names: >> + items: >> + - const: rtc >> + >> +required: >> + - compatible >> + - reg >> + - interrupts >> + - clocks >> + - clock-names >> + >> +additionalProperties: false >> + >> +examples: >> + - | >> + #include <dt-bindings/clock/microchip,mpfs-clock.h> >> + rtc@20124000 { >> + compatible = "microchip,mpfs-rtc"; >> + reg = <0x20124000 0x1000>; >> + clocks = <&clkcfg CLK_RTC>; >> + clock-names = "rtc"; >> + interrupts = <80>, <81>; >> + }; >> +... >> -- >> 2.32.0 >> >>
