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Subject[PATCH 2/6] dt-bindings: rtc: stm32: add alarm A out property to select output
Date
STM32 RTC can pulse some SOC pins when an alarm of RTC expires.

This patch adds property to activate alarm A output. The pulse can
output on three pins RTC_OUT1, RTC_OUT2, RTC_OUT2_RMP
(PC13, PB2, PI8 on stm32mp15) (PC13, PB2, PI1 on stm32mp13).

Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
---
.../devicetree/bindings/rtc/st,stm32-rtc.yaml | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml b/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml
index 56d46ea35c5d..71e02604e8de 100644
--- a/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml
+++ b/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml
@@ -59,6 +59,13 @@ properties:
Refer to <include/dt-bindings/rtc/rtc-stm32.h> for the supported values.
Pinctrl state named "default" may be defined to reserve pin for RTC output.

+ st,alarm:
+ $ref: "/schemas/types.yaml#/definitions/uint32"
+ description: |
+ To select and enable RTC Alarm A output.
+ Refer to <include/dt-bindings/rtc/rtc-stm32.h> for the supported values.
+ Pinctrl state named "default" may be defined to reserve pin for RTC output.
+
allOf:
- if:
properties:
@@ -75,6 +82,9 @@ allOf:
st,lsco:
maxItems: 0

+ st,alarm:
+ maxItems: 0
+
clock-names: false

required:
@@ -95,6 +105,9 @@ allOf:
st,lsco:
maxItems: 0

+ st,alarm:
+ maxItems: 0
+
required:
- clock-names
- st,syscfg
@@ -117,6 +130,9 @@ allOf:
st,lsco:
maxItems: 1

+ st,alarm:
+ maxItems: 1
+
required:
- clock-names

@@ -153,8 +169,9 @@ examples:
clocks = <&rcc RTCAPB>, <&rcc RTC>;
clock-names = "pclk", "rtc_ck";
interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
+ st,alarm = <RTC_OUT1>;
st,lsco = <RTC_OUT2_RMP>;
- pinctrl-0 = <&rtc_out2_rmp_pins_a>;
+ pinctrl-0 = <&rtc_out1_pins_a &rtc_out2_rmp_pins_a>;
pinctrl-names = "default";
};

--
2.25.1
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