[PATCH v8 0/1] Polarfire SoC GPIO support

[Conor Dooley <conor@xxxxxxxxxx>]

From: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>

Hey all,

Lewis is no longer at Microchip, so I've taken over the GPIO controller
patchset that he had been working on prior to that:
https://lore.kernel.org/linux-gpio/20220815120834.1562544-1-lewis.hanly@xxxxxxxxxxxxx/

One thing that was wrong with Lewis' series was that it could only,
depending on the iteration of the series, support GPIOs that had their
interrupts muxed or GPIOs that had dedicated interrupts at the
parent interrupt controller. I found that to be problematic, because the
hardware itself always has a mix of muxed and dedicated interrupts and
so there was always a controller rendered unusable for interrupts.
I attempted to fix this by remodelling how the interrupt hierarchy in
the devicetree is described, with a mux added between the GPIO
controllers and the platform's interrupt controller. v7 introduced an
irqchip driver for the mux between the GPIO controllers and PLIC to handle
that problem.

After some discussion with Linus on v7, I've opted to strip out the
interrupt handling entirely, in order to upstream this piecemeal.
Interrupt controller support will be added at a later date, when I've
sorted out the bits that Thomas did not approve of.

The binding for this GPIO controller is already upstream, so there's
just one patch here now.

Cheers,
Conor.

v7: https://lore.kernel.org/linux-gpio/20240723-supervise-drown-d5d3b303e7fd@wendy/

CC: Daire McNamara <daire.mcnamara@xxxxxxxxxxxxx>
CC: valentina.fernandezalanis@xxxxxxxxxxxxx
CC: Linus Walleij <linus.walleij@xxxxxxxxxx>
CC: Bartosz Golaszewski <brgl@xxxxxxxx>
CC: <linux-gpio@xxxxxxxxxxxxxxx>

Lewis Hanly (1):
  gpio: mpfs: add polarfire soc gpio support

 drivers/gpio/Kconfig     |   7 ++
 drivers/gpio/Makefile    |   1 +
 drivers/gpio/gpio-mpfs.c | 178 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 186 insertions(+)
 create mode 100644 drivers/gpio/gpio-mpfs.c

-- 
2.45.2