Re: [PATCH] pinctrl: stm32: add lock mechanism for irqmux selection

[Alexandre Torgue]

On 5/24/19 1:26 PM, Linus Walleij wrote:
> On Fri, May 10, 2019 at 9:43 AM Alexandre Torgue
> <alexandre.torgue@xxxxxx> wrote:
>
> > GPIOs are split between several banks (A, B, ...) and each bank can have
> > up to 16 lines. Those GPIOs could be used as interrupt lines thanks to
> > exti lines. As there are only 16 exti lines, a mux is used to select which
> > gpio line is connected to which exti line. Mapping is done as follow:
> >
> > -A0, B0, C0.. -->exti_line_0 (X0 selected by mux_0)
> > -A1, B1, C1.. -->exti_line_1 (X1 selected by mux_1)
> > ...
> >
> > This patch adds a protection to avoid overriding on mux_n for exti_line_n.
> >
> > Signed-off-by: Alexandre Torgue <alexandre.torgue@xxxxxx>
>
> Patch applied, can't say I fully understand it but you know what
> you're doing!

Thanks :). Do you need a better explanation ?

> Yours,
> Linus Walleij