1 // SPDX-License-Identifier: GPL-2.0
3  * Backlight code for via-pmu
6  * Copyright (C) 2001-2002 Benjamin Herrenschmidt
7  * Copyright (C) 2006      Michael Hanselmann <linux-kernel@hansmi.ch>
25 	int i, flat, count, range = (max - min);  in pmu_backlight_init_curve()
39 	int level = (FB_BACKLIGHT_LEVELS - 1);  in pmu_backlight_curve_lookup()  local
48 		int diff = abs(bl_curve[i] - value);  in pmu_backlight_curve_lookup()
51 			level = i;  in pmu_backlight_curve_lookup()
54 	return level;  in pmu_backlight_curve_lookup()
57 static int pmu_backlight_get_level_brightness(int level)  in pmu_backlight_get_level_brightness()  argument
62 	pmulevel = bl_curve[level] * FB_BACKLIGHT_MAX / MAX_PMU_LEVEL;  in pmu_backlight_get_level_brightness()
74 	int level = bd->props.brightness;  in __pmu_backlight_update_status()  local
77 	if (bd->props.power != FB_BLANK_UNBLANK ||  in __pmu_backlight_update_status()
78 	    bd->props.fb_blank != FB_BLANK_UNBLANK)  in __pmu_backlight_update_status()
79 		level = 0;  in __pmu_backlight_update_status()
81 	if (level > 0) {  in __pmu_backlight_update_status()
82 		int pmulevel = pmu_backlight_get_level_brightness(level);  in __pmu_backlight_update_status()
105 	/* Don't update brightness when sleeping */  in pmu_backlight_update_status()
144 	int level, autosave;  in pmu_backlight_init()  local
161 	props.max_brightness = FB_BACKLIGHT_LEVELS - 1;  in pmu_backlight_init()
171 	level = bd->props.max_brightness;  in pmu_backlight_init()
179 		level = pmu_backlight_curve_lookup(  in pmu_backlight_init()
181 				bd->props.max_brightness / 15);  in pmu_backlight_init()
184 	bd->props.brightness = level;  in pmu_backlight_init()
185 	bd->props.power = FB_BLANK_UNBLANK;  in pmu_backlight_init()