[PATCH 1/6] dt-bindings: rtc: stm32: add st, lsco optional property to select output
From: Valentin Caron <hidden>
Date: 2022-05-04 13:03:19
Also in:
linux-devicetree, linux-rtc, lkml
Subsystem:
open firmware and flattened device tree bindings, real time clock (rtc) subsystem, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Alexandre Belloni, Linus Torvalds
From: Amelie Delaunay <amelie.delaunay@foss.st.com> STM32 RTC has three output pins: RTC_OUT1, RTC_OUT2 or RTC_OUT2_RMP. RTC Low-Speed Clock Output (LSCO) can be output on RTC_OUT1 or RTC_OUT2_RMP. This patch adds constants for RTC output bindings and adds st,lsco optional property for stm32 rtc driver, to select and enable LSCO. A pinctrl state is also optional to reserve pin for RTC output. Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Signed-off-by: Valentin Caron <redacted> --- .../devicetree/bindings/rtc/st,stm32-rtc.yaml | 20 +++++++++++++++++++ include/dt-bindings/rtc/rtc-stm32.h | 14 +++++++++++++ 2 files changed, 34 insertions(+) create mode 100644 include/dt-bindings/rtc/rtc-stm32.h
diff --git a/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml b/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml
index 764717ce1873..56d46ea35c5d 100644
--- a/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml
+++ b/Documentation/devicetree/bindings/rtc/st,stm32-rtc.yaml@@ -52,6 +52,13 @@ properties: override default rtc_ck parent clock phandle of the new parent clock of rtc_ck maxItems: 1 + st,lsco: + $ref: "/schemas/types.yaml#/definitions/uint32" + description: | + To select and enable RTC Low Speed Clock 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:
@@ -65,6 +72,9 @@ allOf: minItems: 1 maxItems: 1 + st,lsco: + maxItems: 0 + clock-names: false required:
@@ -82,6 +92,9 @@ allOf: minItems: 2 maxItems: 2 + st,lsco: + maxItems: 0 + required: - clock-names - st,syscfg
@@ -101,6 +114,9 @@ allOf: assigned-clocks: false assigned-clock-parents: false + st,lsco: + maxItems: 1 + required: - clock-names
@@ -130,12 +146,16 @@ examples: - | #include <dt-bindings/interrupt-controller/arm-gic.h> #include <dt-bindings/clock/stm32mp1-clks.h> + #include <dt-bindings/rtc/rtc-stm32.h> rtc@5c004000 { compatible = "st,stm32mp1-rtc"; reg = <0x5c004000 0x400>; clocks = <&rcc RTCAPB>, <&rcc RTC>; clock-names = "pclk", "rtc_ck"; interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>; + st,lsco = <RTC_OUT2_RMP>; + pinctrl-0 = <&rtc_out2_rmp_pins_a>; + pinctrl-names = "default"; }; ...
diff --git a/include/dt-bindings/rtc/rtc-stm32.h b/include/dt-bindings/rtc/rtc-stm32.h
new file mode 100644
index 000000000000..2fd78c2e62d4
--- /dev/null
+++ b/include/dt-bindings/rtc/rtc-stm32.h@@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * This header provides constants for STM32_RTC bindings. + */ + +#ifndef _DT_BINDINGS_RTC_RTC_STM32_H +#define _DT_BINDINGS_RTC_RTC_STM32_H + +#define RTC_NO_OUT 0 +#define RTC_OUT1 1 +#define RTC_OUT2 2 +#define RTC_OUT2_RMP 3 + +#endif
--
2.25.1
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