[PATCH v3 0/2] gpio-mmio: Extend to handle pinctrl back-ends

[Linus Walleij <linus.walleij@linaro.org>]

If we're using gpio-mmio with a pinctrl backend the
direction callbacks need to finalize their work by
calling into the pin control back-end.

As I was made aware that the vf610 driver was missing
only that to use gpio-mmio instead of custom code,
I took a stab at it.

This patch is made on top of Johan Korsnes bug fix (v3),
so it needs to be applied after that is in, if this
works.

Plese try it out on vf610!

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
Changes in v3:
- Use the port->gpio_base for accessing GPIO registers.
- Specify only GPOR for setting/clearing/reading the
  output, hoping a RMW on that register works with MMIO.
- Rebased on the applied v3 version of Johan's fix patch.
- Link to v2: https://lore.kernel.org/r/20250215-vf610-mmio-v2-0-4a91f8c8e8d5@linaro.org

Changes in v2:
- Use the dual input/output set/clear registers for output.
- Provide the BGPIOF_READ_OUTPUT_REG_SET flag so the driver
  behaves as described in the commit message...
- Drop the now unused spinlock (gpio-mmio has its own).
- Fix a speling mistake.
- Link to v1: https://lore.kernel.org/r/20250214-vf610-mmio-v1-0-6cccd0292e84@linaro.org

---
Linus Walleij (2):
      gpio: mmio: Add flag for calling pinctrl back-end
      gpio: vf610: Switch to gpio-mmio

 drivers/gpio/Kconfig        |   1 +
 drivers/gpio/gpio-mmio.c    |  36 +++++++++++----
 drivers/gpio/gpio-vf610.c   | 105 +++++++-------------------------------------
 include/linux/gpio/driver.h |   3 ++
 4 files changed, 49 insertions(+), 96 deletions(-)
---
base-commit: f751bf0670cbb166c58e99d57373765405178426
change-id: 20250213-vf610-mmio-eddfaeb6b197

Best regards,
-- 
Linus Walleij <linus.walleij@linaro.org>