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| author | Valentin Caron <valentin.caron@foss.st.com> | 2024-07-22 18:00:21 +0200 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2024-08-14 11:37:07 +0200 |
| commit | bb7b0df2be5c6b7bfe0cf9c93067c5b1489566ca (patch) | |
| tree | 889b76b9334cabaf85b8a52679c85e6603c89b82 /drivers/rtc/Kconfig | |
| parent | rtc: stm32: add pinctrl and pinmux interfaces (diff) | |
| download | linux-bb7b0df2be5c6b7bfe0cf9c93067c5b1489566ca.tar.xz linux-bb7b0df2be5c6b7bfe0cf9c93067c5b1489566ca.zip | |
rtc: stm32: add Low Speed Clock Output (LSCO) support
RTC is able to output on a pin the "LSE" internal clock.
STM32 RTC is now registered as a clock provider.
It provides rtc_lsco clock, that means RTC_LSCO is output on either
RTC_OUT1 or RTC_OUT2_RMP, depending on pinmux DT property.
The clock is marked as CLK_IGNORE_UNUSED and CLK_IS_CRITICAL because
RTC_LSCO can be early required by devices needed it to init.
Add LSCO in pinmux functions.
Add "stm32_rtc_clean_outs" to disable LSCO. As RTC is part of "backup"
power domain, it is not reset during shutdown or reboot. So force LSCO
disable at probe.
Co-developed-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
Link: https://lore.kernel.org/r/20240722160022.454226-4-valentin.caron@foss.st.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'drivers/rtc/Kconfig')
| -rw-r--r-- | drivers/rtc/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 4b1a87027a3d..b3469f6986e9 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -1928,6 +1928,7 @@ config RTC_DRV_STM32 select PINMUX select PINCONF select GENERIC_PINCONF + depends on COMMON_CLK help If you say yes here you get support for the STM32 On-Chip Real Time Clock. |