Mon, Mar 06, 2023 at 09:00:04AM +0000, Biju Das kirjoitti:
> Add a simple sysfs interface to the generic pinctrl framework
> for configuring pins for output disable operation.
>
> /sys/class/pinctrl/
> `-- output-disable/
> |-- configure (w/o) ask the kernel to configure a pin group
> for output disable operation.
>
> echo "<group-name function-name 0 1>" > configure
>
> The existing "pinmux-functions" debugfs file lists the pin functions
> registered for the pin controller. For example:
>
> function 0: usb0, groups = [ usb0 ]
> function 1: usb1, groups = [ usb1 ]
> function 2: gpt4-pins, groups = [ gpt4-pins ]
> function 3: scif0, groups = [ scif0 ]
> function 4: scif2, groups = [ scif2 ]
> function 5: spi1, groups = [ spi1 ]
>
> To configure gpt4-pins for output disable activation by user:
>
> echo "gpt4-pins gpt4-pins 0 1" > configure
...
> +static struct attribute *pinctrl_attrs[] = {
> + &dev_attr_configure.attr,
> + NULL,
No comma for a terminator entry.
> +};
--
With Best Regards,
Andy Shevchenko
