video/backlight/arcxcnn_bl.c

94 static int arcxcnn_update_field(struct arcxcnn *lp, u8 reg, u8 mask, u8 data)
99 	ret = i2c_smbus_read_byte_data(lp->client, reg);
101 		dev_err(lp->dev, "failed to read 0x%.2x\n", reg);
109 	return i2c_smbus_write_byte_data(lp->client, reg, tmp);
112 static int arcxcnn_set_brightness(struct arcxcnn *lp, u32 brightness)
119 	ret = i2c_smbus_write_byte_data(lp->client,
126 	return i2c_smbus_write_byte_data(lp->client,
132 	struct arcxcnn *lp = bl_get_data(bl);
136 	ret = arcxcnn_set_brightness(lp, brightness);
141 	return arcxcnn_update_field(lp, ARCXCNN_CMD, ARCXCNN_CMD_STDBY,
150 static int arcxcnn_backlight_register(struct arcxcnn *lp)
153 	const char *name = lp->pdata->name ? : "arctic_bl";
155 	props = devm_kzalloc(lp->dev, sizeof(*props), GFP_KERNEL);
162 	if (lp->pdata->initial_brightness > props->max_brightness)
163 		lp->pdata->initial_brightness = props->max_brightness;
165 	props->brightness = lp->pdata->initial_brightness;
167 	lp->bl = devm_backlight_device_register(lp->dev, name, lp->dev, lp,
169 	return PTR_ERR_OR_ZERO(lp->bl);
172 static void arcxcnn_parse_dt(struct arcxcnn *lp)
174 	struct device *dev = lp->dev;
183 	ret = of_property_read_string(node, "label", &lp->pdata->name);
185 		lp->pdata->name = NULL;
189 		lp->pdata->initial_brightness = prog_val;
193 		lp->pdata->led_config_0 = (u8)prog_val;
197 		lp->pdata->led_config_1 = (u8)prog_val;
201 		lp->pdata->dim_freq = (u8)prog_val;
205 		lp->pdata->comp_config = (u8)prog_val;
209 		lp->pdata->filter_config = (u8)prog_val;
213 		lp->pdata->trim_config = (u8)prog_val;
217 		lp->pdata->leden = ARCXCNN_LEDEN_MASK; /* all on is default */
230 		lp->pdata->leden = 0;
236 			lp->pdata->leden |= onbit;
243 	struct arcxcnn *lp;
249 	lp = devm_kzalloc(&cl->dev, sizeof(*lp), GFP_KERNEL);
250 	if (!lp)
253 	lp->client = cl;
254 	lp->dev = &cl->dev;
255 	lp->pdata = dev_get_platdata(&cl->dev);
258 	ret = i2c_smbus_write_byte_data(lp->client,
263 	if (!lp->pdata) {
264 		lp->pdata = devm_kzalloc(lp->dev,
265 				sizeof(*lp->pdata), GFP_KERNEL);
266 		if (!lp->pdata)
270 		lp->pdata->name = NULL;
271 		lp->pdata->initial_brightness = INIT_BRIGHT;
272 		lp->pdata->leden = ARCXCNN_LEDEN_MASK;
274 		lp->pdata->led_config_0 = i2c_smbus_read_byte_data(
275 			lp->client, ARCXCNN_FADECTRL);
277 		lp->pdata->led_config_1 = i2c_smbus_read_byte_data(
278 			lp->client, ARCXCNN_ILED_CONFIG);
280 		lp->pdata->led_config_1 |= ARCXCNN_ILED_DIM_INT;
282 		lp->pdata->dim_freq = i2c_smbus_read_byte_data(
283 			lp->client, ARCXCNN_DIMFREQ);
285 		lp->pdata->comp_config = i2c_smbus_read_byte_data(
286 			lp->client, ARCXCNN_COMP_CONFIG);
288 		lp->pdata->filter_config = i2c_smbus_read_byte_data(
289 			lp->client, ARCXCNN_FILT_CONFIG);
291 		lp->pdata->trim_config = i2c_smbus_read_byte_data(
292 			lp->client, ARCXCNN_IMAXTUNE);
295 			arcxcnn_parse_dt(lp);
298 	i2c_set_clientdata(cl, lp);
301 	if (lp->pdata->initial_brightness > MAX_BRIGHTNESS)
302 		lp->pdata->initial_brightness = MAX_BRIGHTNESS;
305 	ret = arcxcnn_set_brightness(lp, lp->pdata->initial_brightness);
310 	ret = i2c_smbus_write_byte_data(lp->client, ARCXCNN_FADECTRL,
311 		lp->pdata->led_config_0);
315 	ret = i2c_smbus_write_byte_data(lp->client, ARCXCNN_ILED_CONFIG,
316 		lp->pdata->led_config_1);
320 	ret = i2c_smbus_write_byte_data(lp->client, ARCXCNN_DIMFREQ,
321 		lp->pdata->dim_freq);
325 	ret = i2c_smbus_write_byte_data(lp->client, ARCXCNN_COMP_CONFIG,
326 		lp->pdata->comp_config);
330 	ret = i2c_smbus_write_byte_data(lp->client, ARCXCNN_FILT_CONFIG,
331 		lp->pdata->filter_config);
335 	ret = i2c_smbus_write_byte_data(lp->client, ARCXCNN_IMAXTUNE,
336 		lp->pdata->trim_config);
341 	arcxcnn_update_field(lp, ARCXCNN_LEDEN,
342 		ARCXCNN_LEDEN_MASK, lp->pdata->leden);
344 	ret = arcxcnn_backlight_register(lp);
348 	backlight_update_status(lp->bl);
353 	dev_err(lp->dev,
357 	dev_err(lp->dev,
364 	struct arcxcnn *lp = i2c_get_clientdata(cl);
367 	i2c_smbus_write_byte_data(lp->client,
370 	i2c_smbus_write_byte_data(lp->client,
373 	lp->bl->props.brightness = 0;
375 	backlight_update_status(lp->bl);