[PATCH v4 04/14] dt-bindings: rtc: add bindings for microchip mpfs rtc

From: conor.dooley
Date: Mon Jan 17 2022 - 06:06:31 EST


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
+
+ 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
+
+ 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