On Sun, Jan 22, 2017 at 5:24 PM, Hans de Goede <hdegoede@xxxxxxxxxx> wrote: > On x86 we do not have devicetree to link the pwm controller and > the display controller together. So someone needs to call > pwm_add_table() to create the link, so that the i915 driver's > pwm_get(dev, "pwm_backlight") call returns the lpss' pwm0. > > The pwm subsystem does not want to have pwm_add_table() calls > directly in pwm drivers (this leads to probe ordering issues), > so lets do it here since the acpi-lpss code is always builtin. Hans, just to be sure, the device you have is using LPSS pwm for backlight. Since I just recall that on some (Baytrail) models we have PMIC (Crystal Cove) that responsible for PWM for backlight. And we have no PMIC driver in kernel for CherryTrail (Dollar Cove). -- With Best Regards, Andy Shevchenko -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
