arm64: dts: st: use lptimer3 as tick broadcast source on stm32mp257f-ev1

During the low power modes the generic ARM timer is deactivated, so the
the tick broadcast is used, based on LPTIMER3 which is clocked by LSE on
STMicroelectronics boards.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

diff --git a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
index 9d1a1155e36ccc283cb73e51b91f3200ee54a4aa..2f561ad4066544445e93db78557bc4be1c27095a 100644 (file)
--- a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
+++ b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
@@ -222,6 +222,14 @@
        };
 };
 
+/* use LPTIMER with tick broadcast for suspend mode */
+&lptimer3 {
+       status = "okay";
+       timer {
+               status = "okay";
+       };
+};
+
 &rtc {
        status = "okay";
 };