[v3] at91: Remove of_platform_default_populate() calls

[PATCH v3 0/3] at91: Remove of_platform_default_populate() calls

Posted by Rob Herring (Arm) 1 month ago

This is another attempt at removing of_platform_default_populate() calls 
on at91 platforms. The last attempts were in 2018[1] and 2023[2]. The 
problems reported are PM and NAND failures. Both of these depend on SRAM 
pool which doesn't have any fw_devlink tracking. Also, the PM code is 
not a driver, so fw_devlink wouldn't help. For the NAND driver, we can 
simply defer probe. For the PM init, we can move it to the .late_init 
hook.

Rob

[1] https://lore.kernel.org/all/20180712192222.32481-1-robh@kernel.org/
[2] https://lore.kernel.org/all/3908fa6f-dc33-4aac-c21f-4a676a3a6b23@microchip.com/

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
---
Changes in v3:
- Fixup mismatch in my author vs. Sob.
- Fixup the split between patch 2 and 3 to fix bisection
- Use dev_err_probe() in NAND driver
- Link to v2: https://patch.msgid.link/20251120-at91-probe-v2-0-8c8592f02e8e@kernel.org

---
Rob Herring (Arm) (3):
      mtd: nand: atmel: Defer probe if SRAM is missing
      ARM: at91: Move PM init functions to .init_late hook
      ARM: at91: remove unnecessary of_platform_default_populate calls

 arch/arm/mach-at91/at91rm9200.c              | 12 +-----------
 arch/arm/mach-at91/at91sam9.c                | 12 +-----------
 arch/arm/mach-at91/sam9x60.c                 | 12 +-----------
 arch/arm/mach-at91/sam9x7.c                  | 12 +-----------
 arch/arm/mach-at91/sama5.c                   | 21 +++------------------
 arch/arm/mach-at91/sama7.c                   | 11 +----------
 drivers/mtd/nand/raw/atmel/nand-controller.c |  6 ++----
 7 files changed, 10 insertions(+), 76 deletions(-)
---
base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8
change-id: 20251120-at91-probe-20fbce9a6d1b

Best regards,
--  
Rob Herring (Arm) <robh@kernel.org>

Re: [PATCH v3 0/3] at91: Remove of_platform_default_populate() calls

Posted by Miquel Raynal 2 weeks, 4 days ago

On Mon, 05 Jan 2026 15:06:42 -0600, Rob Herring (Arm) wrote:
> This is another attempt at removing of_platform_default_populate() calls
> on at91 platforms. The last attempts were in 2018[1] and 2023[2]. The
> problems reported are PM and NAND failures. Both of these depend on SRAM
> pool which doesn't have any fw_devlink tracking. Also, the PM code is
> not a driver, so fw_devlink wouldn't help. For the NAND driver, we can
> simply defer probe. For the PM init, we can move it to the .late_init
> hook.
> 
> [...]

Applied to nand/next, thanks!

[1/3] mtd: nand: atmel: Defer probe if SRAM is missing

Patche(s) should be available on mtd/linux.git and will be
part of the next PR (provided that no robot complains by then).

Kind regards,
Miquèl

Re: [PATCH v3 0/3] at91: Remove of_platform_default_populate() calls

Posted by Claudiu Beznea 3 weeks, 6 days ago


On 1/5/26 23:06, Rob Herring (Arm) wrote:
> Rob Herring (Arm) (3):
>        ARM: at91: Move PM init functions to .init_late hook
>        ARM: at91: remove unnecessary of_platform_default_populate calls

Applied to at91-soc, thanks!