| /* |
| * Generic PWM backlight driver data - see drivers/video/backlight/pwm_bl.c |
| */ |
| #ifndef __LINUX_PWM_BACKLIGHT_H |
| #define __LINUX_PWM_BACKLIGHT_H |
| |
| struct platform_pwm_backlight_data { |
| int pwm_id; |
| /* The platform can either specify simply the maximum and default |
| * brightness steps or those plus a set max_brightness PWM pulse |
| * widths, in nanoseconds. In the former case, the PWM pulses are |
| * linear from 1 to max_brightness. In the latter case, the |
| * platform specifies whatever ramp (e.g. eye response) makes |
| * sense. |
| */ |
| unsigned int max_brightness; |
| unsigned int dft_brightness; |
| const unsigned long *ramp; |
| unsigned int lth_brightness; |
| unsigned int pwm_period_ns; |
| /* The platform can optionally specify LED driver-specific |
| * parameters such as a constant enable duration, minimum pulse |
| * width and an initial start pulse train. |
| */ |
| struct { |
| int enable_ns; |
| int pulse_min_ns; |
| int start_pulse_min_ns; |
| int start_pulse_ns; |
| int start_ms; |
| int start_period_ns; |
| } driver; |
| int (*init)(struct device *dev); |
| int (*notify)(struct device *dev, int brightness); |
| void (*exit)(struct device *dev); |
| }; |
| |
| #endif |
