boards: stm32: Define lptim domain clock using device tree

Convert lptim configuration from Kconfig to device tree.
Note that some boards were using Kconfig default value (LSI),
which now has to be made explicit using device tree.

If not done already, enable the required clock node (lse/lsi).

Clean up related Kconfig bits when required.

(cherry picked from commit ddd6207ce5ac98fa93076a67d03c5b5c009a0017)

Original-Signed-off-by: Erwan Gouriou <>
GitOrigin-RevId: ddd6207ce5ac98fa93076a67d03c5b5c009a0017
Change-Id: I12504a2d69b15ad5ca4fb5e6d4c4ba4fa6ca9860
Commit-Queue: Jack Rosenthal <>
Tested-by: CopyBot Service Account <>
Reviewed-by: Jack Rosenthal <>
1 file changed