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/linux/arch/powerpc/platforms/powermac/
A Dbacklight.c109 int brightness; in pmac_backlight_key_worker() local
113 brightness = props->brightness + in pmac_backlight_key_worker()
117 if (brightness < 0) in pmac_backlight_key_worker()
118 brightness = 0; in pmac_backlight_key_worker()
120 brightness = props->max_brightness; in pmac_backlight_key_worker()
122 props->brightness = brightness; in pmac_backlight_key_worker()
150 props->brightness = brightness * in __pmac_backlight_set_legacy_brightness()
155 props->brightness = props->max_brightness; in __pmac_backlight_set_legacy_brightness()
156 else if (props->brightness < 0) in __pmac_backlight_set_legacy_brightness()
157 props->brightness = 0; in __pmac_backlight_set_legacy_brightness()
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/linux/drivers/video/backlight/
A Daat2870_bl.c25 int brightness; /* current brightness */ member
29 int brightness) in aat2870_brightness() argument
34 val = brightness * (aat2870_bl->max_current - 1); in aat2870_brightness()
62 int brightness = bd->props.brightness; in aat2870_bl_update_status() local
65 if ((brightness < 0) || (bd->props.max_brightness < brightness)) { in aat2870_bl_update_status()
76 brightness = 0; in aat2870_bl_update_status()
83 if (brightness == 0) { in aat2870_bl_update_status()
87 } else if (aat2870_bl->brightness == 0) { in aat2870_bl_update_status()
93 aat2870_bl->brightness = brightness; in aat2870_bl_update_status()
170 aat2870_bl->brightness = 0; in aat2870_bl_probe()
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A Das3711_bl.c29 int brightness; member
62 brightness); in as3711_set_brightness_auto_i()
65 brightness); in as3711_set_brightness_auto_i()
68 brightness); in as3711_set_brightness_auto_i()
77 if (brightness > 31) in as3711_set_brightness_v()
107 int brightness; in as3711_bl_update_status() local
127 if (brightness) { in as3711_bl_update_status()
141 brightness); in as3711_bl_update_status()
145 brightness); in as3711_bl_update_status()
149 brightness); in as3711_bl_update_status()
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A Drt4831-backlight.c36 int brightness = backlight_get_brightness(bl_dev); in rt4831_bl_update_status() local
37 unsigned int enable = brightness ? RT4831_BLEN_MASK : 0; in rt4831_bl_update_status()
41 if (brightness) { in rt4831_bl_update_status()
42 v[0] = (brightness - 1) & RT4831_BLDIML_MASK; in rt4831_bl_update_status()
43 v[1] = ((brightness - 1) & RT4831_BLDIMH_MASK) >> RT4831_BLDIMH_SHIFT; in rt4831_bl_update_status()
88 u32 brightness; in rt4831_parse_backlight_properties() local
93 ret = device_property_read_u32(dev, "max-brightness", &brightness); in rt4831_parse_backlight_properties()
95 brightness = RT4831_BLMAX_BRIGHTNESS; in rt4831_parse_backlight_properties()
101 brightness = bl_props->max_brightness; in rt4831_parse_backlight_properties()
103 bl_props->brightness = min_t(u32, brightness, bl_props->max_brightness); in rt4831_parse_backlight_properties()
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A Dpcf50633-backlight.c22 unsigned int brightness; member
58 else if (bl->props.brightness < pcf_bl->brightness_limit) in pcf50633_bl_update_status()
59 new_brightness = bl->props.brightness; in pcf50633_bl_update_status()
64 if (pcf_bl->brightness == new_brightness) in pcf50633_bl_update_status()
70 if (!pcf_bl->brightness) in pcf50633_bl_update_status()
76 pcf_bl->brightness = new_brightness; in pcf50633_bl_update_status()
85 return pcf_bl->brightness; in pcf50633_bl_get_brightness()
112 bl_props.brightness = pdata->default_brightness; in pcf50633_bl_probe()
115 bl_props.brightness = 0x3f; in pcf50633_bl_probe()
136 pcf_bl->brightness = pcf_bl->bl->props.brightness + 1; in pcf50633_bl_probe()
A Dpandora_bl.c42 int brightness = bl->props.brightness; in pandora_backlight_update_status() local
47 brightness = 0; in pandora_backlight_update_status()
49 brightness = 0; in pandora_backlight_update_status()
51 brightness = 0; in pandora_backlight_update_status()
53 if ((unsigned int)brightness > MAX_USER_VALUE) in pandora_backlight_update_status()
54 brightness = MAX_USER_VALUE; in pandora_backlight_update_status()
56 if (brightness == 0) { in pandora_backlight_update_status()
93 twl_i2c_write_u8(TWL_MODULE_PWM, MIN_VALUE + brightness, TWL_PWM0_OFF); in pandora_backlight_update_status()
96 if (brightness != 0) in pandora_backlight_update_status()
138 bl->props.brightness = MAX_USER_VALUE; in pandora_backlight_probe()
A Dktd253-backlight.c78 int brightness = backlight_get_brightness(bl); in ktd253_backlight_update_status() local
83 dev_dbg(ktd253->dev, "new brightness/ratio: %d/32\n", brightness); in ktd253_backlight_update_status()
85 target_ratio = brightness; in ktd253_backlight_update_status()
149 u32 brightness; in ktd253_backlight_probe() local
166 ret = device_property_read_u32(dev, "default-brightness", &brightness); in ktd253_backlight_probe()
168 brightness = KTD253_DEFAULT_RATIO; in ktd253_backlight_probe()
169 if (brightness > max_brightness) { in ktd253_backlight_probe()
172 brightness = max_brightness; in ktd253_backlight_probe()
194 if (brightness) { in ktd253_backlight_probe()
195 bl->props.brightness = brightness; in ktd253_backlight_probe()
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A Dda9052_bl.c40 uint brightness; member
72 if (wleds->brightness) { in da9052_adjust_wled_brightness()
74 wleds->brightness); in da9052_adjust_wled_brightness()
84 int brightness = bl->props.brightness; in da9052_backlight_update_status() local
87 wleds->brightness = brightness; in da9052_backlight_update_status()
97 return wleds->brightness; in da9052_backlight_get_brightness()
116 wleds->brightness = 0; in da9052_backlight_probe()
132 bl->props.brightness = 0; in da9052_backlight_probe()
143 wleds->brightness = 0; in da9052_backlight_remove()
A Dlm3639_bl.c116 return bl->props.brightness; in lm3639_bled_update_status()
127 if (!bl->props.brightness) in lm3639_bled_update_status()
134 return bl->props.brightness; in lm3639_bled_update_status()
137 return bl->props.brightness; in lm3639_bled_update_status()
153 return bl->props.brightness; in lm3639_bled_get_brightness()
165 bl->props.brightness = reg_val; in lm3639_bled_get_brightness()
167 return bl->props.brightness; in lm3639_bled_get_brightness()
170 return bl->props.brightness; in lm3639_bled_get_brightness()
220 enum led_brightness brightness) in lm3639_torch_brightness_set() argument
235 if (!brightness) { in lm3639_torch_brightness_set()
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A Dams369fg06.c233 if ((brightness >= 0) && (brightness <= 50)) in ams369fg06_gamma_ctl()
235 else if ((brightness > 50) && (brightness <= 100)) in ams369fg06_gamma_ctl()
237 else if ((brightness > 100) && (brightness <= 150)) in ams369fg06_gamma_ctl()
239 else if ((brightness > 150) && (brightness <= 200)) in ams369fg06_gamma_ctl()
241 else if ((brightness > 200) && (brightness <= 255)) in ams369fg06_gamma_ctl()
341 ret = ams369fg06_gamma_ctl(lcd, bd->props.brightness); in ams369fg06_power_on()
411 int brightness = bd->props.brightness; in ams369fg06_set_brightness() local
414 if (brightness < MIN_BRIGHTNESS || in ams369fg06_set_brightness()
415 brightness > bd->props.max_brightness) { in ams369fg06_set_brightness()
421 ret = ams369fg06_gamma_ctl(lcd, bd->props.brightness); in ams369fg06_set_brightness()
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A Dtosa_bl.c36 static void tosa_bl_set_backlight(struct tosa_bl_data *data, int brightness) in tosa_bl_set_backlight() argument
43 i2c_smbus_write_byte_data(data->i2c, DAC_CH2, (u8)(brightness & 0xff)); in tosa_bl_set_backlight()
46 gpiod_set_value(data->gpio, brightness & 0x100); in tosa_bl_set_backlight()
48 tosa_bl_enable(spi, brightness); in tosa_bl_set_backlight()
56 int brightness = props->brightness; in tosa_bl_update_status() local
59 brightness = 0; in tosa_bl_update_status()
61 tosa_bl_set_backlight(data, brightness); in tosa_bl_update_status()
70 return props->brightness; in tosa_bl_get_brightness()
112 data->bl->props.brightness = 69; in tosa_bl_probe()
A Dlm3630a_bl.c205 if (bl->props.brightness < 0x4) in lm3630a_bank_a_update_status()
221 int brightness, rval; in lm3630a_bank_a_get_brightness() local
233 brightness |= rval; in lm3630a_bank_a_get_brightness()
245 brightness = rval; in lm3630a_bank_a_get_brightness()
248 bl->props.brightness = brightness; in lm3630a_bank_a_get_brightness()
249 return bl->props.brightness; in lm3630a_bank_a_get_brightness()
296 int brightness, rval; in lm3630a_bank_b_get_brightness() local
308 brightness |= rval; in lm3630a_bank_b_get_brightness()
320 brightness = rval; in lm3630a_bank_b_get_brightness()
323 bl->props.brightness = brightness; in lm3630a_bank_b_get_brightness()
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/linux/drivers/hid/
A Dhid-lg-g15.c103 brightness = g15->leds[g15_led->led].brightness; in lg_g15_led_get()
106 return brightness; in lg_g15_led_get()
133 val = brightness; in lg_g15_led_set()
150 g15_led->brightness = brightness; in lg_g15_led_set()
176 brightness[i] = g15->leds[i].brightness; in lg_g15_leds_changed_work()
187 brightness[i]); in lg_g15_leds_changed_work()
247 g15_led->brightness = brightness; in lg_g510_kbd_led_write()
390 brightness = g15->leds[g15_led->led].brightness; in lg_g510_mkey_led_get()
393 return brightness; in lg_g510_mkey_led_get()
413 val = brightness; in lg_g510_mkey_led_set()
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/linux/Documentation/devicetree/bindings/leds/backlight/
A Dpwm-backlight.yaml42 brightness-levels:
44 Array of distinct brightness levels. Typically these are in the range
51 default-brightness-level:
53 The default brightness level (index into the array defined by the
54 "brightness-levels" property).
65 default-brightness-level: [brightness-levels]
66 num-interpolated-steps: [brightness-levels]
81 brightness-levels = <0 4 8 16 32 64 128 255>;
82 default-brightness-level = <6>;
96 brightness-levels = <0 2048 4096 8192 16384 65535>;
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A Dled-backlight.yaml27 brightness-levels:
29 Array of distinct brightness levels. The levels must be in the range
31 backlight brightness level into a LED brightness level. If it is not
35 default-brightness-level:
37 The default brightness level (index into the array defined by the
38 "brightness-levels" property).
53 brightness-levels = <0 4 8 16 32 64 128 255>;
54 default-brightness-level = <6>;
/linux/drivers/net/wireless/ralink/rt2x00/
A Drt2x00leds.c22 unsigned int brightness; in rt2x00leds_led_quality() local
55 brightness = ((LED_FULL / 6) * rssi) + 1; in rt2x00leds_led_quality()
56 if (brightness != led->led_dev.brightness) { in rt2x00leds_led_quality()
57 led->led_dev.brightness_set(&led->led_dev, brightness); in rt2x00leds_led_quality()
58 led->led_dev.brightness = brightness; in rt2x00leds_led_quality()
64 unsigned int brightness = enabled ? LED_FULL : LED_OFF; in rt2x00led_led_simple() local
69 led->led_dev.brightness_set(&led->led_dev, brightness); in rt2x00led_led_simple()
70 led->led_dev.brightness = brightness; in rt2x00led_led_simple()
99 led->led_dev.brightness = LED_OFF; in rt2x00leds_register_led()
203 led->led_dev.brightness = LED_OFF; in rt2x00leds_suspend_led()
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/linux/Documentation/leds/
A Dleds-lm3556.rst35 #echo 0 > /sys/class/leds/flash/brightness
39 #echo 1 > /sys/class/leds/flash/brightness
45 #echo 16 > /sys/class/leds/flash/brightness
62 #echo 0 > /sys/class/leds/torch/brightness
66 #echo 1 > /sys/class/leds/torch/brightness
72 #echo 8 > /sys/class/leds/torch/brightness
98 Indicator brightness can be controlled through
99 sys/class/leds/indicator/brightness file.
105 #echo 0 > /sys/class/leds/indicator/brightness
109 #echo 1 > /sys/class/leds/indicator/brightness
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A Dleds-class-multicolor.rst12 via brightness file.
35 -rw-r--r-- 1 root root 4096 Oct 19 16:16 brightness
42 The brightness level for each LED is calculated based on the color LED
44 the requested brightness.
46 led_brightness = brightness * multi_intensity/max_brightness
49 A user first writes the multi_intensity file with the brightness levels
69 global 'brightness' control. Assuming a max_brightness of 255 the user
71 128 to the global brightness file then the values written to each LED will be
76 echo 128 > /sys/class/leds/multicolor:status/brightness
82 Reading the global brightness file will return the current brightness value of
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/linux/Documentation/devicetree/bindings/leds/
A Dleds-trigger-pattern.txt3 The pattern is given by a series of tuples, of brightness and duration (ms).
4 The LED is expected to traverse the series and each brightness value for the
5 specified duration. Duration of 0 means brightness should immediately change to
10 change of brightness, i.e. the subsequent brightness will be applied without
22 LED brightness
31 2. To make the LED go instantly from one brightness value to another, we should
32 use zero-time lengths (the brightness must be same as the previous tuple's). So
39 It will make the LED stay off for one second, then stay at max brightness for
42 LED brightness
/linux/drivers/leds/
A Dled-core.c63 unsigned long brightness; in led_timer_function() local
78 brightness = led_get_brightness(led_cdev); in led_timer_function()
79 if (!brightness) { in led_timer_function()
83 brightness = led_cdev->new_blink_brightness; in led_timer_function()
85 brightness = led_cdev->blink_brightness; in led_timer_function()
91 led_cdev->blink_brightness = brightness; in led_timer_function()
92 brightness = LED_OFF; in led_timer_function()
104 if (brightness) in led_timer_function()
108 if (!brightness) in led_timer_function()
253 if (!brightness) { in led_set_brightness()
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A Dleds-pwm.c42 enum led_brightness brightness) in led_pwm_set() argument
49 duty *= brightness; in led_pwm_set()
70 led_data->cdev.brightness = LED_OFF; in led_pwm_add()
101 led_data->cdev.brightness = led->max_brightness; in led_pwm_add()
105 uint64_t brightness; in led_pwm_add() local
107 brightness = led->max_brightness; in led_pwm_add()
108 brightness *= led_data->pwmstate.duty_cycle; in led_pwm_add()
109 do_div(brightness, led_data->pwmstate.period); in led_pwm_add()
110 led_data->cdev.brightness = brightness; in led_pwm_add()
123 ret = led_pwm_set(&led_data->cdev, led_data->cdev.brightness); in led_pwm_add()
A Duleds.c33 int brightness; member
40 enum led_brightness brightness) in uleds_brightness_set() argument
45 if (udev->brightness != brightness) { in uleds_brightness_set()
46 udev->brightness = brightness; in uleds_brightness_set()
137 if (count < sizeof(udev->brightness)) in uleds_read()
150 retval = copy_to_user(buffer, &udev->brightness, in uleds_read()
151 sizeof(udev->brightness)); in uleds_read()
153 retval = sizeof(udev->brightness); in uleds_read()
/linux/Documentation/ABI/testing/
A Dsysfs-class-led1 What: /sys/class/leds/<led>/brightness
6 Set the brightness of the LED.
8 Most LEDs don't have hardware brightness support, so will
9 just be turned on for non-zero brightness settings.
20 led_brightness = brightness * multi_intensity/max_brightness
31 top brightness trigger is going to use.
42 If the LED does not support different brightness levels, this
49 Last hardware set brightness level for this LED. Some LEDs
55 the brightness.
57 Reading this file will return the last brightness level set
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A Dsysfs-class-backlight6 Description of the scale of the brightness curve.
8 The human eye senses brightness approximately logarithmically,
9 hence linear changes in brightness are perceived as being
12 backlights with a linear brightness curve.
17 The scale of the brightness curve is unknown.
20 The brightness changes linearly with each step. Brightness
43 brightness).
86 /sys/class/backlight/<backlight>/brightness.
93 Control the maximum brightness for <ambient light zone>
95 will also show the brightness level stored for this
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/linux/drivers/gpu/drm/nouveau/dispnv04/
A Doverlay.c46 struct drm_property *brightness; member
53 int brightness; member
255 else if (property == nv_plane->props.brightness) in nv_set_property()
256 nv_plane->brightness = value; in nv_set_property()
318 !plane->props.brightness || in nv10_overlay_init()
331 plane->brightness = 512; in nv10_overlay_init()
333 plane->props.brightness, plane->brightness); in nv10_overlay_init()
376 int brightness = (nv_plane->brightness - 512) * 62 / 512; in nv04_update_plane() local
490 !plane->props.brightness) in nv04_overlay_init()
497 plane->brightness = 512; in nv04_overlay_init()
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