1 // SPDX-License-Identifier: GPL-2.0
3 // Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
15 #include <linux/leds-ti-lmu-common.h>
47  * struct lm3697_led -
48  * @hvled_strings: Array of LED strings associated with a control bank
55  * @enabled: LED brightness level (or LED_OFF)
65 	int enabled;  member
70  * struct lm3697 -
77  * @leds: Array of LED strings
127 	int ctrl_en_val = (1 << led->control_bank);  in lm3697_brightness_set()
128 	struct device *dev = led->priv->dev;  in lm3697_brightness_set()
131 	mutex_lock(&led->priv->lock);  in lm3697_brightness_set()
134 		ret = regmap_update_bits(led->priv->regmap, LM3697_CTRL_ENABLE,  in lm3697_brightness_set()
141 		led->enabled = LED_OFF;  in lm3697_brightness_set()
143 		ret = ti_lmu_common_set_brightness(&led->lmu_data, brt_val);  in lm3697_brightness_set()
149 		if (!led->enabled) {  in lm3697_brightness_set()
150 			ret = regmap_update_bits(led->priv->regmap,  in lm3697_brightness_set()
158 			led->enabled = brt_val;  in lm3697_brightness_set()
163 	mutex_unlock(&led->priv->lock);  in lm3697_brightness_set()
169 	struct device *dev = priv->dev;  in lm3697_init()
173 	if (priv->enable_gpio) {  in lm3697_init()
174 		gpiod_direction_output(priv->enable_gpio, 1);  in lm3697_init()
176 		ret = regmap_write(priv->regmap, LM3697_RESET, LM3697_SW_RESET);  in lm3697_init()
183 	ret = regmap_write(priv->regmap, LM3697_CTRL_ENABLE, 0x0);  in lm3697_init()
189 	ret = regmap_write(priv->regmap, LM3697_OUTPUT_CONFIG, priv->bank_cfg);  in lm3697_init()
193 	for (i = 0; i < priv->num_banks; i++) {  in lm3697_init()
194 		led = &priv->leds[i];  in lm3697_init()
195 		ret = ti_lmu_common_set_ramp(&led->lmu_data);  in lm3697_init()
206 	struct device *dev = priv->dev;  in lm3697_probe_dt()
208 	int ret = -EINVAL;  in lm3697_probe_dt()
213 	priv->enable_gpio = devm_gpiod_get_optional(dev, "enable",  in lm3697_probe_dt()
215 	if (IS_ERR(priv->enable_gpio))  in lm3697_probe_dt()
216 		return dev_err_probe(dev, PTR_ERR(priv->enable_gpio),  in lm3697_probe_dt()
219 	priv->regulator = devm_regulator_get(dev, "vled");  in lm3697_probe_dt()
220 	if (IS_ERR(priv->regulator))  in lm3697_probe_dt()
221 		priv->regulator = NULL;  in lm3697_probe_dt()
234 			ret = -EINVAL;  in lm3697_probe_dt()
238 		led = &priv->leds[i];  in lm3697_probe_dt()
240 		ret = ti_lmu_common_get_brt_res(dev, child, &led->lmu_data);  in lm3697_probe_dt()
245 		led->control_bank = control_bank;  in lm3697_probe_dt()
246 		led->lmu_data.regmap = priv->regmap;  in lm3697_probe_dt()
247 		led->lmu_data.runtime_ramp_reg = LM3697_CTRL_A_RAMP +  in lm3697_probe_dt()
249 		led->lmu_data.msb_brightness_reg = LM3697_CTRL_A_BRT_MSB +  in lm3697_probe_dt()
250 						   led->control_bank * 2;  in lm3697_probe_dt()
251 		led->lmu_data.lsb_brightness_reg = LM3697_CTRL_A_BRT_LSB +  in lm3697_probe_dt()
252 						   led->control_bank * 2;  in lm3697_probe_dt()
254 		led->num_leds = fwnode_property_count_u32(child, "led-sources");  in lm3697_probe_dt()
255 		if (led->num_leds > LM3697_MAX_LED_STRINGS) {  in lm3697_probe_dt()
256 			dev_err(dev, "Too many LED strings defined\n");  in lm3697_probe_dt()
260 		ret = fwnode_property_read_u32_array(child, "led-sources",  in lm3697_probe_dt()
261 						    led->hvled_strings,  in lm3697_probe_dt()
262 						    led->num_leds);  in lm3697_probe_dt()
264 			dev_err(dev, "led-sources property missing\n");  in lm3697_probe_dt()
268 		for (j = 0; j < led->num_leds; j++)  in lm3697_probe_dt()
269 			priv->bank_cfg |=  in lm3697_probe_dt()
270 				(led->control_bank << led->hvled_strings[j]);  in lm3697_probe_dt()
272 		ret = ti_lmu_common_get_ramp_params(dev, child, &led->lmu_data);  in lm3697_probe_dt()
274 			dev_warn(dev, "runtime-ramp properties missing\n");  in lm3697_probe_dt()
277 		init_data.devicename = priv->client->name;  in lm3697_probe_dt()
281 		led->priv = priv;  in lm3697_probe_dt()
282 		led->led_dev.max_brightness = led->lmu_data.max_brightness;  in lm3697_probe_dt()
283 		led->led_dev.brightness_set_blocking = lm3697_brightness_set;  in lm3697_probe_dt()
285 		ret = devm_led_classdev_register_ext(dev, &led->led_dev,  in lm3697_probe_dt()
304 	struct device *dev = &client->dev;  in lm3697_probe()
312 		return -ENODEV;  in lm3697_probe()
317 		return -ENOMEM;  in lm3697_probe()
319 	mutex_init(&led->lock);  in lm3697_probe()
322 	led->client = client;  in lm3697_probe()
323 	led->dev = dev;  in lm3697_probe()
324 	led->num_banks = count;  in lm3697_probe()
325 	led->regmap = devm_regmap_init_i2c(client, &lm3697_regmap_config);  in lm3697_probe()
326 	if (IS_ERR(led->regmap)) {  in lm3697_probe()
327 		ret = PTR_ERR(led->regmap);  in lm3697_probe()
342 	struct device *dev = &led->client->dev;  in lm3697_remove()
345 	ret = regmap_update_bits(led->regmap, LM3697_CTRL_ENABLE,  in lm3697_remove()
350 	if (led->enable_gpio)  in lm3697_remove()
351 		gpiod_direction_output(led->enable_gpio, 0);  in lm3697_remove()
353 	if (led->regulator) {  in lm3697_remove()
354 		ret = regulator_disable(led->regulator);  in lm3697_remove()
359 	mutex_destroy(&led->lock);  in lm3697_remove()