On Sat, Apr 29, 2023 at 9:16 PM Hans de Goede <hdegoede@xxxxxxxxxx> wrote:
>
> On the Android yb1-x90f/l models there is not ACPI method to control
> the keyboard backlight brightness. Instead the second PWM controller
> is exposed directly to the OS there.
>
> Add support for controlling keyboard backlight brightness on the Android
> model by using the PWM subsystem to directly control the PWM.
...
> +#define YB_KBD_BL_PWM_PERIOD 13333
Defined...
> +static struct pwm_lookup yogabook_pdev_pwm_lookup[] = {
> + PWM_LOOKUP_WITH_MODULE("80862289:00", 0, YB_PDEV_NAME,
> + "kbd_bl_pwm", 13333, PWM_POLARITY_NORMAL,
...but not used?
> + "pwm-lpss-platform"),
> +};
...
> + if (IS_ERR(data->kbd_bl_pwm)) {
> + r = PTR_ERR(data->kbd_bl_pwm);
> + dev_err_probe(dev, r, "Getting keyboard backlight PWM\n");
r = dev_err_probe();
> + goto error_put_devs;
> + }
--
With Best Regards,
Andy Shevchenko
