RE: [PATCH] gpio: mmio: do not calculate bgpio_bits via "ngpios"
From: Asmaa Mnebhi
Date: Wed Jun 26 2024 - 11:00:09 EST
I am not sure this change is needed?
When I initially submitted " gpio: mmio: handle "ngpios" properly in bgpio_init() ", It was specifically because I have a 32bit reg access but only 16 gpios. Initially, I did not add the else and so Andy suggested to add it with the roundup_pow_of_two to stay backward compatible. If your system is a 32 bit arch and you only use 16 Gpio bits, why don't you configure that in your DTS?
Thanks.
Asmaa
> drivers/gpio/gpio-mmio.c | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/drivers/gpio/gpio-mmio.c b/drivers/gpio/gpio-mmio.c index
> 71e1af7c2184..d89e78f0ead3 100644
> --- a/drivers/gpio/gpio-mmio.c
> +++ b/drivers/gpio/gpio-mmio.c
> @@ -619,8 +619,6 @@ int bgpio_init(struct gpio_chip *gc, struct device *dev,
> ret = gpiochip_get_ngpios(gc, dev);
> if (ret)
> gc->ngpio = gc->bgpio_bits;
> - else
> - gc->bgpio_bits = roundup_pow_of_two(round_up(gc->ngpio,
> 8));
>
> ret = bgpio_setup_io(gc, dat, set, clr, flags);
> if (ret)
> --
> 2.45.1