13 #include <linux/backlight.h>
17 #include <linux/gpio.h>
75 	struct backlight_device *backlight;  member
81 	return i2c_smbus_write_byte_data(bd->client, reg, data);  in bd6107_write()
84 static int bd6107_backlight_update_status(struct backlight_device *backlight)  in bd6107_backlight_update_status()  argument
86 	struct bd6107 *bd = bl_get_data(backlight);  in bd6107_backlight_update_status()
87 	int brightness = backlight->props.brightness;  in bd6107_backlight_update_status()
89 	if (backlight->props.power != FB_BLANK_UNBLANK ||  in bd6107_backlight_update_status()
90 	    backlight->props.fb_blank != FB_BLANK_UNBLANK ||  in bd6107_backlight_update_status()
91 	    backlight->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))  in bd6107_backlight_update_status()
100 		gpio_set_value(bd->pdata->reset, 0);  in bd6107_backlight_update_status()
102 		gpio_set_value(bd->pdata->reset, 1);  in bd6107_backlight_update_status()
108 static int bd6107_backlight_check_fb(struct backlight_device *backlight,  in bd6107_backlight_check_fb()  argument
111 	struct bd6107 *bd = bl_get_data(backlight);  in bd6107_backlight_check_fb()
113 	return bd->pdata->fbdev == NULL || bd->pdata->fbdev == info->dev;  in bd6107_backlight_check_fb()
125 	struct bd6107_platform_data *pdata = dev_get_platdata(&client->dev);  in bd6107_probe()
126 	struct backlight_device *backlight;  in bd6107_probe()  local
131 	if (pdata == NULL || !pdata->reset) {  in bd6107_probe()
132 		dev_err(&client->dev, "No reset GPIO in platform data\n");  in bd6107_probe()
133 		return -EINVAL;  in bd6107_probe()
136 	if (!i2c_check_functionality(client->adapter,  in bd6107_probe()
138 		dev_warn(&client->dev,  in bd6107_probe()
140 		return -EIO;  in bd6107_probe()
143 	bd = devm_kzalloc(&client->dev, sizeof(*bd), GFP_KERNEL);  in bd6107_probe()
145 		return -ENOMEM;  in bd6107_probe()
147 	bd->client = client;  in bd6107_probe()
148 	bd->pdata = pdata;  in bd6107_probe()
150 	ret = devm_gpio_request_one(&client->dev, pdata->reset,  in bd6107_probe()
153 		dev_err(&client->dev, "unable to request reset GPIO\n");  in bd6107_probe()
160 	props.brightness = clamp_t(unsigned int, pdata->def_value, 0,  in bd6107_probe()
163 	backlight = devm_backlight_device_register(&client->dev,  in bd6107_probe()
164 					      dev_name(&client->dev),  in bd6107_probe()
165 					      &bd->client->dev, bd,  in bd6107_probe()
167 	if (IS_ERR(backlight)) {  in bd6107_probe()
168 		dev_err(&client->dev, "failed to register backlight\n");  in bd6107_probe()
169 		return PTR_ERR(backlight);  in bd6107_probe()
172 	backlight_update_status(backlight);  in bd6107_probe()
173 	i2c_set_clientdata(client, backlight);  in bd6107_probe()
180 	struct backlight_device *backlight = i2c_get_clientdata(client);  in bd6107_remove()  local
182 	backlight->props.brightness = 0;  in bd6107_remove()
183 	backlight_update_status(backlight);  in bd6107_remove()
205 MODULE_DESCRIPTION("Rohm BD6107 Backlight Driver");