path: root/Documentation/devicetree/bindings/rtc/st,stm32-rtc.txt
diff options
authorAmelie Delaunay <amelie.delaunay@st.com>2018-04-19 15:21:42 +0200
committerAlexandre Belloni <alexandre.belloni@bootlin.com>2018-05-06 22:22:42 +0200
commitdeb7dcfbf00ccdf0d7fadfa4fa18adacef2b8b7a (patch)
treea441b2fccf0babb1c94f9383f586c72c398c5b78 /Documentation/devicetree/bindings/rtc/st,stm32-rtc.txt
parentrtc: stm32: fix alarm interrupt flags by removing IRQF_TRIGGER_RISING (diff)
dt-bindings: rtc: update stm32-rtc documentation for st, syscfg property
RTC driver should not be aware of the PWR registers offset and bits position. Furthermore, we can imagine that Disable Backup Protection (DBP) relative register and bit mask could change depending on the SoC. So this patch moves st,syscfg property from single pwrcfg phandle to pwrcfg phandle/offset/mask triplet. Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com> Acked-by: Alexandre TORGUE <alexandre.torgue@st.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'Documentation/devicetree/bindings/rtc/st,stm32-rtc.txt')
1 files changed, 6 insertions, 4 deletions
diff --git a/Documentation/devicetree/bindings/rtc/st,stm32-rtc.txt b/Documentation/devicetree/bindings/rtc/st,stm32-rtc.txt
index a66692a08ace..00f8b5d27fbe 100644
--- a/Documentation/devicetree/bindings/rtc/st,stm32-rtc.txt
+++ b/Documentation/devicetree/bindings/rtc/st,stm32-rtc.txt
@@ -14,8 +14,10 @@ Required properties:
It is required only on stm32h7.
- 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.
+- 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.
Optional properties (to override default rtc_ck parent clock):
- assigned-clocks: reference to the rtc_ck clock entry.
@@ -31,7 +33,7 @@ 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 +46,5 @@ Example:
interrupt-parent = <&exti>;
interrupts = <17 1>;
interrupt-names = "alarm";
- st,syscfg = <&pwrcfg>;
+ st,syscfg = <&pwrcfg 0x00 0x100>;