[PATCH v7 09/15] gpiolib: regmap: add gpio_regmap_get_chip()

[zl020895]

Hi Michael,

Thanks for the review.

gpio-regmap can already attach a domain via config.irq_domain or
regmap_irq_chip. PL061 cannot use regmap-irq: type is programmed in
IS/IBE/IEV (including both-edge) and the parent IRQ is an AMBA chained
demux.

In v8 the custom linear domain used the gpio_chip as host_data, and
that chip only exists after gpio_regmap_register(), so I added
gpio_regmap_get_chip().

I can drop the helper: create the domain with the PL061 private data as
host_data, pass it in config.irq_domain, and let gpio-regmap register
it. I will do that in the next revision if you agree.

Best regards,
Long Zhao

At 2026-09-21 20:48:44, "Michael Walle" <michael at walle.cc> wrote:
>On Tue Sep 15, 2026 at 1:15 PM CEST, Long Zhao via B4 Relay wrote:
>> From: Long Zhao <longzhao at ambarella.com>
>>
>> Let drivers that implement a custom irqchip retrieve the gpio_chip
>> after registration. Attach a caller-provided irq_domain only when it
>> is present.
>
>So why do we need this? Why can't gpio-regmap register the
>irq_domain?
>
>-michael