Hi Drew,

On Wed, Feb 10, 2021 at 8:50 AM Drew Fustini [off-list ref] wrote:

Add "pinmux-select" to debugfs which will activate a function and group
when 2 integers "<function-selector> <group-selector>" are written to
the file. The write operation pinmux_select() handles this by checking
if fsel and gsel are valid selectors and then calling ops->set_mux().

Thanks for your patch!

The existing "pinmux-functions" debugfs file lists the pin functions
registered for the pin controller. For example:

function: pinmux-uart0, groups = [ pinmux-uart0-pins ]
function: pinmux-mmc0, groups = [ pinmux-mmc0-pins ]
function: pinmux-mmc1, groups = [ pinmux-mmc1-pins ]
function: pinmux-i2c0, groups = [ pinmux-i2c0-pins ]
function: pinmux-i2c1, groups = [ pinmux-i2c1-pins ]
function: pinmux-spi1, groups = [ pinmux-spi1-pins ]

To activate function pinmux-i2c1 (fsel 4) and group pinmux-i2c1-pins
(gsel 4):

echo '4 4' > pinmux-select

I think you forgot to update the example.

I assume

    echo pinmux-i2c1 pinmux-i2c1-pins > mux-select

?

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds