Hi Alexandre

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

Hello,

On 20/01/2025 10:25:32+0800, Peng Fan (OSS) wrote:

quoted

i.MX95 System Manager(SM) BBM protocol exports two RTCs for EVK

board.

quoted

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

quoted

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.

It is the i.MX SCMI Protocol exports two RTCs using one protocol.

Two RTC devices are created, but share one parent device.

Do you mean each RTC device should have a unique parent device?

Thanks,
Peng.

quoted

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

++++++++++-

quoted

 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 ++++++++++++++-------

-

quoted

 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 [off-list ref]

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