pinctrl: keembay: make keembay_gpio_irqchip const

gpiolib warns about mutable irq_chips at probe time:
"not an immutable chip, please consider fixing it!"

Make keembay_gpio_irqchip const, flag it as IRQCHIP_IMMUTABLE, add the
GPIOCHIP_IRQ_RESOURCE_HELPERS and register it with
gpio_irq_chip_set_chip().

The chip only implements .irq_enable() and .irq_disable(), so call
gpiochip_enable_irq() and gpiochip_disable_irq() from those callbacks,
following commit 35d008679a5a ("pinctrl: plgpio: Convert to immutable
irq_chip") [1] and commit 2993d2dd8ff4 ("gpio: timberdale: Make irq_chip
immutable") [2]. gpiochip_enable_irq() is called once a free interrupt
source and slot have been found, so a line is only marked enabled when
it is actually routed. gpiochip_disable_irq() is called after the line
has been cleared from the interrupt configuration register.

Link: https://lore.kernel.org/r/20230414-immutable-irqchips-2-v1-3-6b59a5186b00@linaro.org [1]
Link: https://lore.kernel.org/r/20250509-gpio-v1-8-639377c98288@nxp.com [2]
Signed-off-by: Areeb Ul Haq Mirza <auhmirza02@gmail.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>

0 files changed, 0 insertions, 0 deletions