Control intel backlight on FreeBSD (and OpenBSD)
openbsd
cleanup whitespace
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intel_backlight.c
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intel_backlight.c
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{
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*(volatile uint32_t *)((volatile char*)mmio + reg) = val;
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}
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static int brightness_levels[] = {1, 2, 4, 6, 9, 12, 16, 20, 25, 30, 36, 43,
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51, 60, 70, 80, 90, 100};
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51, 60, 70, 80, 90, 100};
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static int brightness_incr(int curr)
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{
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min = 0.5 + 0.5 * max / 100.0; // 0.5%
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/*
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printf ("min: %d, NUM_ELEMENTS(brightness_levels): %d\n", min,
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printf ("min: %d, NUM_ELEMENTS(brightness_levels): %d\n", min,
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NUM_ELEMENTS(brightness_levels));
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*/
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result = 0.5 + current * 100.0 / max;
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printf ("current backlight value: %d%% (%d/%d)\n", result, current, max);
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if (argc > 1) {
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uint32_t v;
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if (0 == strcmp(argv[1], "incr"))
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if (0 == strcmp(argv[1], "incr"))
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v = 0.5 + brightness_incr(result) * max / 100.0;
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else if (0 == strcmp(argv[1], "decr"))
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v = 0.5 + brightness_decr(result) * max / 100.0;
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else
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else
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v = 0.5 + atoi (argv[1]) * max / 100.0;
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/*
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printf("v: %d\n", v);