Re: [PATCH 0/4] rtc/scmi: Support multiple RTCs

Alexandre Belloni
2025-01-20T10:21:20Z

Hello,

On 20/01/2025 10:25:32+0800, Peng Fan (OSS) wrote:
> i.MX95 System Manager(SM) BBM protocol exports two RTCs for EVK board.
> one RTC is SoC internal RTC, the other is board RTC.
>
> The current driver only use the 1st RTC. With this patchset, both RTCs
> could be used in Linux. To achieve this:
>
> 1. Support more event sources for BBM protocol
> 2. Add bbm_info hook to let users could query the number of RTCs
> 3. Introduce devm_rtc_allocate_device_priv to support setting rtc device
> private information
> 4. Update rtc-imx-sm-bbm.c to register both RTCs
>

I'm sorry but no, you have to register two RTCs like any other system
would do.

> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
> Peng Fan (4):
> firmware: arm_scmi: imx: Support more event sources
> firmware: arm_scmi: imx: Introduce bbm_info hook
> rtc: Introduce devm_rtc_allocate_device_priv
> rtc: imx-sm-bbm: Support multiple RTCs
>
> drivers/firmware/arm_scmi/vendors/imx/imx-sm-bbm.c | 33 ++++++++++-
> drivers/rtc/class.c | 9 ++-
> drivers/rtc/dev.c | 8 ++-
> drivers/rtc/interface.c | 16 ++---
> drivers/rtc/proc.c | 2 +-
> drivers/rtc/rtc-imx-sm-bbm.c | 69 ++++++++++++++--------
> include/linux/rtc.h | 2 +
> include/linux/scmi_imx_protocol.h | 2 +
> 8 files changed, 100 insertions(+), 41 deletions(-)
> ---
> base-commit: e7bb221a638962d487231ac45a6699fb9bb8f9fa
> change-id: 20250116-rtc-3834e01786a8
>
> Best regards,
> --
> Peng Fan <peng.fan@nxp.com>
>

--
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering