video/backlight/lp8788_bl.c

71 static int lp8788_backlight_configure(struct lp8788_bl *bl)
73 	struct lp8788_backlight_platform_data *pdata = bl->pdata;
93 	ret = lp8788_write_byte(bl->lp, LP8788_BL_RAMP, val);
112 		dev_err(bl->lp->dev, "invalid mode: %d\n", cfg->bl_mode);
116 	bl->mode = cfg->bl_mode;
118 	return lp8788_write_byte(bl->lp, LP8788_BL_CONFIG, val);
121 static void lp8788_pwm_ctrl(struct lp8788_bl *bl, int br, int max_br)
128 	if (!bl->pdata)
131 	period = bl->pdata->period_ns;
133 	dev = bl->lp->dev;
136 	if (!bl->pwm) {
143 		bl->pwm = pwm;
152 	pwm_config(bl->pwm, duty, period);
154 		pwm_enable(bl->pwm);
156 		pwm_disable(bl->pwm);
161 	struct lp8788_bl *bl = bl_get_data(bl_dev);
162 	enum lp8788_bl_ctrl_mode mode = bl->mode;
171 		lp8788_pwm_ctrl(bl, brt, max);
175 		lp8788_write_byte(bl->lp, LP8788_BL_BRIGHTNESS, brt);
186 static int lp8788_backlight_register(struct lp8788_bl *bl)
190 	struct lp8788_backlight_platform_data *pdata = bl->pdata;
213 	bl_dev = backlight_device_register(name, bl->lp->dev, bl,
218 	bl->bl_dev = bl_dev;
223 static void lp8788_backlight_unregister(struct lp8788_bl *bl)
225 	struct backlight_device *bl_dev = bl->bl_dev;
233 	struct lp8788_bl *bl = dev_get_drvdata(dev);
234 	enum lp8788_bl_ctrl_mode mode = bl->mode;
261 	struct lp8788_bl *bl;
264 	bl = devm_kzalloc(lp->dev, sizeof(struct lp8788_bl), GFP_KERNEL);
265 	if (!bl)
268 	bl->lp = lp;
270 		bl->pdata = lp->pdata->bl_pdata;
272 	platform_set_drvdata(pdev, bl);
274 	ret = lp8788_backlight_configure(bl);
280 	ret = lp8788_backlight_register(bl);
292 	backlight_update_status(bl->bl_dev);
297 	lp8788_backlight_unregister(bl);
304 	struct lp8788_bl *bl = platform_get_drvdata(pdev);
305 	struct backlight_device *bl_dev = bl->bl_dev;
310 	lp8788_backlight_unregister(bl);