Re: [PATCH] pinctrl: pinctrl-single: Fix pcs_request_gpio() when bits_per_mux != 0

[Andy Shevchenko]

On Mon, Jan 22, 2018 at 1:03 AM, David Lechner <david@xxxxxxxxxxxxxx> wrote:
> This fixes pcs_request_gpio() in the pinctrl-single driver when
> bits_per_mux != 0. It appears this was overlooked when the multiple
> pins per register feature was added.
>
> Fixes: 4e7e8017a80e ("pinctrl: pinctrl-single: enhance to configure
> multiple pins of different modules")

One line?

> +                       byte_num = (pcs->bits_per_pin * pin) / BITS_PER_BYTE;
> +                       offset = (byte_num / mux_bytes) * mux_bytes;
> +                       pin_shift = pin % (pcs->width / pcs->bits_per_pin) *
> +                                   pcs->bits_per_pin;

Sounds like playing around pretty well defined macro and functions,
e.g. DIV_ROUND_UP(), round_up().

-- 
With Best Regards,
Andy Shevchenko