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| author | Conor Dooley <conor.dooley@microchip.com> | 2022-04-13 09:58:33 +0200 |
|---|---|---|
| committer | Stephen Boyd <sboyd@kernel.org> | 2022-04-23 03:40:19 +0200 |
| commit | 8e8fbab4f1e659f9955bc946a2fc71b8c3ba17e0 (patch) | |
| tree | 04cd5061778bfc8c6e4b2d118bc1dc727adf01f4 /Documentation | |
| parent | dt-bindings: clk: mpfs: add defines for two new clocks (diff) | |
| download | linux-8e8fbab4f1e659f9955bc946a2fc71b8c3ba17e0.tar.xz linux-8e8fbab4f1e659f9955bc946a2fc71b8c3ba17e0.zip | |
dt-bindings: rtc: add refclk to mpfs-rtc
The rtc on PolarFire SoC does not use the AHB clock as its reference
frequency, but rather a 1 MHz refclk that it shares with MTIMER. Add
this second clock to the binding as a required property.
Fixes: 4cbcc0d7b397 ("dt-bindings: rtc: add bindings for microchip mpfs rtc")
Reviewed-by: Daire McNamara <daire.mcnamara@microchip.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20220413075835.3354193-7-conor.dooley@microchip.com
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/rtc/microchip,mfps-rtc.yaml | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/rtc/microchip,mfps-rtc.yaml b/Documentation/devicetree/bindings/rtc/microchip,mfps-rtc.yaml index a2e984ea3553..500c62becd6b 100644 --- a/Documentation/devicetree/bindings/rtc/microchip,mfps-rtc.yaml +++ b/Documentation/devicetree/bindings/rtc/microchip,mfps-rtc.yaml @@ -31,11 +31,19 @@ properties: to that of the RTC's count register. clocks: - maxItems: 1 + items: + - description: | + AHB clock + - description: | + Reference clock: divided by the prescaler to create a time-based + strobe (typically 1 Hz) for the calendar counter. By default, the rtc + on the PolarFire SoC shares it's reference with MTIMER so this will + be a 1 MHz clock. clock-names: items: - const: rtc + - const: rtcref required: - compatible @@ -48,11 +56,12 @@ additionalProperties: false examples: - | + #include "dt-bindings/clock/microchip,mpfs-clock.h" rtc@20124000 { compatible = "microchip,mpfs-rtc"; reg = <0x20124000 0x1000>; - clocks = <&clkcfg 21>; - clock-names = "rtc"; + clocks = <&clkcfg CLK_RTC>, <&clkcfg CLK_RTCREF>; + clock-names = "rtc", "rtcref"; interrupts = <80>, <81>; }; ... |