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-rw-r--r--dts/Bindings/rtc/st,stm32-rtc.txt37
1 files changed, 26 insertions, 11 deletions
diff --git a/dts/Bindings/rtc/st,stm32-rtc.txt b/dts/Bindings/rtc/st,stm32-rtc.txt
index a66692a..c920e27 100644
--- a/dts/Bindings/rtc/st,stm32-rtc.txt
+++ b/dts/Bindings/rtc/st,stm32-rtc.txt
@@ -1,23 +1,29 @@
STM32 Real Time Clock
Required properties:
-- compatible: can be either "st,stm32-rtc" or "st,stm32h7-rtc", depending on
- the device is compatible with stm32(f4/f7) or stm32h7.
+- compatible: can be one of the following:
+ - "st,stm32-rtc" for devices compatible with stm32(f4/f7).
+ - "st,stm32h7-rtc" for devices compatible with stm32h7.
+ - "st,stm32mp1-rtc" for devices compatible with stm32mp1.
- reg: address range of rtc register set.
- clocks: can use up to two clocks, depending on part used:
- "rtc_ck": RTC clock source.
- It is required on stm32(f4/f7) and stm32h7.
- "pclk": RTC APB interface clock.
It is not present on stm32(f4/f7).
- It is required on stm32h7.
+ It is required on stm32(h7/mp1).
- clock-names: must be "rtc_ck" and "pclk".
- It is required only on stm32h7.
+ It is required on stm32(h7/mp1).
- interrupt-parent: phandle for the interrupt controller.
-- interrupts: rtc alarm interrupt.
-- st,syscfg: phandle for pwrcfg, mandatory to disable/enable backup domain
- (RTC registers) write protection.
+ It is required on stm32(f4/f7/h7).
+- interrupts: rtc alarm interrupt. On stm32mp1, a second interrupt is required
+ for rtc alarm wakeup interrupt.
+- st,syscfg: phandle/offset/mask triplet. The phandle to pwrcfg used to
+ access control register at offset, and change the dbp (Disable Backup
+ Protection) bit represented by the mask, mandatory to disable/enable backup
+ domain (RTC registers) write protection.
+ It is required on stm32(f4/f7/h7).
-Optional properties (to override default rtc_ck parent clock):
+Optional properties (to override default rtc_ck parent clock on stm32(f4/f7/h7):
- assigned-clocks: reference to the rtc_ck clock entry.
- assigned-clock-parents: phandle of the new parent clock of rtc_ck.
@@ -31,7 +37,7 @@ Example:
assigned-clock-parents = <&rcc 1 CLK_LSE>;
interrupt-parent = <&exti>;
interrupts = <17 1>;
- st,syscfg = <&pwrcfg>;
+ st,syscfg = <&pwrcfg 0x00 0x100>;
};
rtc: rtc@58004000 {
@@ -44,5 +50,14 @@ Example:
interrupt-parent = <&exti>;
interrupts = <17 1>;
interrupt-names = "alarm";
- st,syscfg = <&pwrcfg>;
+ st,syscfg = <&pwrcfg 0x00 0x100>;
+ };
+
+ rtc: rtc@5c004000 {
+ compatible = "st,stm32mp1-rtc";
+ reg = <0x5c004000 0x400>;
+ clocks = <&rcc RTCAPB>, <&rcc RTC>;
+ clock-names = "pclk", "rtc_ck";
+ interrupts-extended = <&intc GIC_SPI 3 IRQ_TYPE_NONE>,
+ <&exti 19 1>;
};