1 // SPDX-License-Identifier: GPL-2.0-only
82 		brightness_val[0] = (brightness - 1) & priv->dim2_mask;  in mt6370_bl_update_status()
83 		brightness_val[1] = (brightness - 1) >> priv->dim2_shift;  in mt6370_bl_update_status()
85 		ret = regmap_raw_write(priv->regmap, MT6370_REG_BL_DIM2,  in mt6370_bl_update_status()
91 	gpiod_set_value(priv->enable_gpio, !!brightness);  in mt6370_bl_update_status()
94 	return regmap_update_bits(priv->regmap, MT6370_REG_BL_EN,  in mt6370_bl_update_status()
101 	unsigned int enable;  in mt6370_bl_get_brightness()  local
105 	ret = regmap_read(priv->regmap, MT6370_REG_BL_EN, &enable);  in mt6370_bl_get_brightness()
109 	if (!(enable & MT6370_BL_EN_MASK))  in mt6370_bl_get_brightness()
112 	ret = regmap_raw_read(priv->regmap, MT6370_REG_BL_DIM2,  in mt6370_bl_get_brightness()
117 	brightness = brightness_val[1] << priv->dim2_shift;  in mt6370_bl_get_brightness()
118 	brightness += brightness_val[0] & priv->dim2_mask;  in mt6370_bl_get_brightness()
132 	struct device *dev = priv->dev;  in mt6370_init_backlight_properties()
140 	if (device_property_read_bool(dev, "mediatek,bled-pwm-enable"))  in mt6370_init_backlight_properties()
143 	if (device_property_read_bool(dev, "mediatek,bled-pwm-hys-enable"))  in mt6370_init_backlight_properties()
147 				      "mediatek,bled-pwm-hys-input-th-steps",  in mt6370_init_backlight_properties()
159 	ret = regmap_update_bits(priv->regmap, MT6370_REG_BL_PWM,  in mt6370_init_backlight_properties()
165 	if (device_property_read_bool(dev, "mediatek,bled-ovp-shutdown"))  in mt6370_init_backlight_properties()
168 	ret = device_property_read_u32(dev, "mediatek,bled-ovp-microvolt",  in mt6370_init_backlight_properties()
173 		ovp_uV = DIV_ROUND_UP(ovp_uV - MT6370_BL_OVP_MIN_UV,  in mt6370_init_backlight_properties()
178 	if (device_property_read_bool(dev, "mediatek,bled-ocp-shutdown"))  in mt6370_init_backlight_properties()
181 	ret = device_property_read_u32(dev, "mediatek,bled-ocp-microamp",  in mt6370_init_backlight_properties()
186 		ocp_uA = DIV_ROUND_UP(ocp_uA - MT6370_BL_OCP_MIN_UA,  in mt6370_init_backlight_properties()
191 	ret = regmap_update_bits(priv->regmap, MT6370_REG_BL_BSTCTRL,  in mt6370_init_backlight_properties()
197 	ret = device_property_read_u32(dev, "max-brightness", &brightness);  in mt6370_init_backlight_properties()
199 		brightness = priv->def_max_brightness;  in mt6370_init_backlight_properties()
201 	props->max_brightness = min_t(u32, brightness, priv->def_max_brightness);  in mt6370_init_backlight_properties()
203 	ret = device_property_read_u32(dev, "default-brightness", &brightness);  in mt6370_init_backlight_properties()
205 		brightness = props->max_brightness;  in mt6370_init_backlight_properties()
207 	props->brightness = min_t(u32, brightness, props->max_brightness);  in mt6370_init_backlight_properties()
210 	if (device_property_read_bool(dev, "mediatek,bled-exponential-mode-enable")) {  in mt6370_init_backlight_properties()
212 		props->scale = BACKLIGHT_SCALE_NON_LINEAR;  in mt6370_init_backlight_properties()
214 		props->scale = BACKLIGHT_SCALE_LINEAR;  in mt6370_init_backlight_properties()
216 	ret = device_property_read_u8(dev, "mediatek,bled-channel-use",  in mt6370_init_backlight_properties()
219 		dev_err(dev, "mediatek,bled-channel-use DT property missing\n");  in mt6370_init_backlight_properties()
227 		return -EINVAL;  in mt6370_init_backlight_properties()
233 	if (priv->enable_gpio)  in mt6370_init_backlight_properties()
236 	return regmap_update_bits(priv->regmap, MT6370_REG_BL_EN, mask, val);  in mt6370_init_backlight_properties()
251 	ret = regmap_read(priv->regmap, MT6370_REG_DEV_INFO, &dev_info);  in mt6370_check_vendor_info()
255 	of_vid = (uintptr_t)device_get_match_data(priv->dev);  in mt6370_check_vendor_info()
259 		return dev_err_probe(priv->dev, -EINVAL,  in mt6370_check_vendor_info()
263 		priv->dim2_mask = MT6370_BL_DIM2_6372_MASK;  in mt6370_check_vendor_info()
264 		priv->dim2_shift = MT6370_BL_DIM2_6372_SHIFT;  in mt6370_check_vendor_info()
265 		priv->def_max_brightness = MT6370_BL_MAX_6372_BRIGHTNESS;  in mt6370_check_vendor_info()
267 		priv->dim2_mask = MT6370_BL_DIM2_COMMON_MASK;  in mt6370_check_vendor_info()
268 		priv->dim2_shift = MT6370_BL_DIM2_COMMON_SHIFT;  in mt6370_check_vendor_info()
269 		priv->def_max_brightness = MT6370_BL_MAX_COMMON_BRIGHTNESS;  in mt6370_check_vendor_info()
280 	struct device *dev = &pdev->dev;  in mt6370_bl_probe()
284 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);  in mt6370_bl_probe()
286 		return -ENOMEM;  in mt6370_bl_probe()
288 	priv->dev = dev;  in mt6370_bl_probe()
290 	priv->regmap = dev_get_regmap(dev->parent, NULL);  in mt6370_bl_probe()
291 	if (!priv->regmap)  in mt6370_bl_probe()
292 		return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");  in mt6370_bl_probe()
298 	priv->enable_gpio = devm_gpiod_get_optional(dev, "enable",  in mt6370_bl_probe()
300 	if (IS_ERR(priv->enable_gpio))  in mt6370_bl_probe()
301 		return dev_err_probe(dev, PTR_ERR(priv->enable_gpio),  in mt6370_bl_probe()
302 				     "Failed to get 'enable' gpio\n");  in mt6370_bl_probe()
309 	priv->bl = devm_backlight_device_register(dev, pdev->name, dev, priv,  in mt6370_bl_probe()
311 	if (IS_ERR(priv->bl))  in mt6370_bl_probe()
312 		return dev_err_probe(dev, PTR_ERR(priv->bl),  in mt6370_bl_probe()
315 	backlight_update_status(priv->bl);  in mt6370_bl_probe()
324 	struct backlight_device *bl_dev = priv->bl;  in mt6370_bl_remove()
326 	bl_dev->props.brightness = 0;  in mt6370_bl_remove()
327 	backlight_update_status(priv->bl);  in mt6370_bl_remove()
331 	{ .compatible = "mediatek,mt6370-backlight", .data = (void *)MT6370_VID_COMMON },
332 	{ .compatible = "mediatek,mt6372-backlight", .data = (void *)MT6370_VID_6372 },
339 		.name = "mt6370-backlight",