2  * Copyright 2015-16 Golden Delicious Computers
106 	{ .compatible = "si-en,sn3199",    .data = &is31fl3199_cdef, },
116 	struct is31fl319x_chip *is31 = led->chip;  in is31fl319x_brightness_set()
117 	int chan = led - is31->leds;  in is31fl319x_brightness_set()
122 	dev_dbg(&is31->client->dev, "%s %d: %d\n", __func__, chan, brightness);  in is31fl319x_brightness_set()
124 	mutex_lock(&is31->lock);  in is31fl319x_brightness_set()
127 	ret = regmap_write(is31->regmap, IS31FL319X_PWM(chan), brightness);  in is31fl319x_brightness_set()
132 	for (i = 0; i < is31->cdef->num_leds; i++) {  in is31fl319x_brightness_set()
141 		ret = regmap_read(is31->regmap, IS31FL319X_PWM(i), &pwm_value);  in is31fl319x_brightness_set()
142 		dev_dbg(&is31->client->dev, "%s read %d: ret=%d: %d\n",  in is31fl319x_brightness_set()
151 			ctrl2 |= on << (i - 6); /* 6..8 => bit 0..2 */  in is31fl319x_brightness_set()
155 		dev_dbg(&is31->client->dev, "power up %02x %02x\n",  in is31fl319x_brightness_set()
157 		regmap_write(is31->regmap, IS31FL319X_CTRL1, ctrl1);  in is31fl319x_brightness_set()
158 		regmap_write(is31->regmap, IS31FL319X_CTRL2, ctrl2);  in is31fl319x_brightness_set()
160 		regmap_write(is31->regmap, IS31FL319X_DATA_UPDATE, 0x00);  in is31fl319x_brightness_set()
162 		ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x01);  in is31fl319x_brightness_set()
164 		dev_dbg(&is31->client->dev, "power down\n");  in is31fl319x_brightness_set()
166 		ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x00);  in is31fl319x_brightness_set()
170 	mutex_unlock(&is31->lock);  in is31fl319x_brightness_set()
179 	struct led_classdev *cdev = &led->cdev;  in is31fl319x_parse_child_dt()
182 	if (of_property_read_string(child, "label", &cdev->name))  in is31fl319x_parse_child_dt()
183 		cdev->name = child->name;  in is31fl319x_parse_child_dt()
185 	ret = of_property_read_string(child, "linux,default-trigger",  in is31fl319x_parse_child_dt()
186 				      &cdev->default_trigger);  in is31fl319x_parse_child_dt()
187 	if (ret < 0 && ret != -EINVAL) /* is optional */  in is31fl319x_parse_child_dt()
190 	led->max_microamp = IS31FL319X_CURRENT_DEFAULT;  in is31fl319x_parse_child_dt()
191 	ret = of_property_read_u32(child, "led-max-microamp",  in is31fl319x_parse_child_dt()
192 				   &led->max_microamp);  in is31fl319x_parse_child_dt()
194 		if (led->max_microamp < IS31FL319X_CURRENT_MIN)  in is31fl319x_parse_child_dt()
195 			return -EINVAL;	/* not supported */  in is31fl319x_parse_child_dt()
196 		led->max_microamp = min(led->max_microamp,  in is31fl319x_parse_child_dt()
206 	struct device_node *np = dev->of_node, *child;  in is31fl319x_parse_dt()
212 		return -ENODEV;  in is31fl319x_parse_dt()
217 		return -EINVAL;  in is31fl319x_parse_dt()
220 	is31->cdef = of_dev_id->data;  in is31fl319x_parse_dt()
225 		of_dev_id->compatible, count);  in is31fl319x_parse_dt()
227 	if (!count || count > is31->cdef->num_leds) {  in is31fl319x_parse_dt()
229 			is31->cdef->num_leds);  in is31fl319x_parse_dt()
230 		return -ENODEV;  in is31fl319x_parse_dt()
243 		if (reg < 1 || reg > is31->cdef->num_leds) {  in is31fl319x_parse_dt()
245 			ret = -EINVAL;  in is31fl319x_parse_dt()
249 		led = &is31->leds[reg - 1];  in is31fl319x_parse_dt()
251 		if (led->configured) {  in is31fl319x_parse_dt()
253 			ret = -EINVAL;  in is31fl319x_parse_dt()
263 		led->configured = true;  in is31fl319x_parse_dt()
266 	is31->audio_gain_db = 0;  in is31fl319x_parse_dt()
267 	ret = of_property_read_u32(np, "audio-gain-db", &is31->audio_gain_db);  in is31fl319x_parse_dt()
269 		is31->audio_gain_db = min(is31->audio_gain_db,  in is31fl319x_parse_dt()
290 		return true; /* always write-through */  in is31fl319x_volatile_reg()
321 static inline int is31fl319x_microamp_to_cs(struct device *dev, u32 microamp)  in is31fl319x_microamp_to_cs()  argument
322 { /* round down to nearest supported value (range check done by caller) */  in is31fl319x_microamp_to_cs()
323 	u32 step = microamp / IS31FL319X_CURRENT_STEP;  in is31fl319x_microamp_to_cs()
325 	return ((IS31FL319X_CONFIG2_CS_STEP_REF - step) &  in is31fl319x_microamp_to_cs()
331 { /* round down to nearest supported value (range check done by caller) */  in is31fl319x_db_to_gain()
339 	struct device *dev = &client->dev;  in is31fl319x_probe()
340 	struct i2c_adapter *adapter = to_i2c_adapter(dev->parent);  in is31fl319x_probe()
346 		return -EIO;  in is31fl319x_probe()
348 	is31 = devm_kzalloc(&client->dev, sizeof(*is31), GFP_KERNEL);  in is31fl319x_probe()
350 		return -ENOMEM;  in is31fl319x_probe()
352 	mutex_init(&is31->lock);  in is31fl319x_probe()
354 	err = is31fl319x_parse_dt(&client->dev, is31);  in is31fl319x_probe()
358 	is31->client = client;  in is31fl319x_probe()
359 	is31->regmap = devm_regmap_init_i2c(client, &regmap_config);  in is31fl319x_probe()
360 	if (IS_ERR(is31->regmap)) {  in is31fl319x_probe()
361 		dev_err(&client->dev, "failed to allocate register map\n");  in is31fl319x_probe()
362 		err = PTR_ERR(is31->regmap);  in is31fl319x_probe()
368 	/* check for write-reply from chip (we can't read any registers) */  in is31fl319x_probe()
369 	err = regmap_write(is31->regmap, IS31FL319X_RESET, 0x00);  in is31fl319x_probe()
371 		dev_err(&client->dev, "no response from chip write: err = %d\n",  in is31fl319x_probe()
373 		err = -EIO; /* does not answer */  in is31fl319x_probe()
378 	 * Kernel conventions require per-LED led-max-microamp property.  in is31fl319x_probe()
382 	for (i = 0; i < is31->cdef->num_leds; i++)  in is31fl319x_probe()
383 		if (is31->leds[i].configured &&  in is31fl319x_probe()
384 		    is31->leds[i].max_microamp < aggregated_led_microamp)  in is31fl319x_probe()
385 			aggregated_led_microamp = is31->leds[i].max_microamp;  in is31fl319x_probe()
387 	regmap_write(is31->regmap, IS31FL319X_CONFIG2,  in is31fl319x_probe()
389 		     is31fl319x_db_to_gain(is31->audio_gain_db));  in is31fl319x_probe()
391 	for (i = 0; i < is31->cdef->num_leds; i++) {  in is31fl319x_probe()
392 		struct is31fl319x_led *led = &is31->leds[i];  in is31fl319x_probe()
394 		if (!led->configured)  in is31fl319x_probe()
397 		led->chip = is31;  in is31fl319x_probe()
398 		led->cdev.brightness_set_blocking = is31fl319x_brightness_set;  in is31fl319x_probe()
400 		err = devm_led_classdev_register(&client->dev, &led->cdev);  in is31fl319x_probe()
408 	mutex_destroy(&is31->lock);  in is31fl319x_probe()
416 	mutex_destroy(&is31->lock);  in is31fl319x_remove()
421  * i2c-core (and modalias) requires that id_table be properly filled,
437 		.name           = "leds-is31fl319x",