1 // SPDX-License-Identifier: GPL-2.0-only
3  * LED driver for Marvell 88PM860x
23 #define LED_ON_CONTINUOUS	(0x0F << 3)
47 	int ret = -EINVAL;  in led_power_set()
56 	case 3:  in led_power_set()
69 	struct pm860x_led *led = container_of(cdev, struct pm860x_led, cdev);  in pm860x_led_set()  local
71 	unsigned char buf[3];  in pm860x_led_set()
74 	chip = led->chip;  in pm860x_led_set()
75 	mutex_lock(&led->lock);  in pm860x_led_set()
76 	led->brightness = value >> 3;  in pm860x_led_set()
78 	if ((led->current_brightness == 0) && led->brightness) {  in pm860x_led_set()
79 		led_power_set(chip, led->port, 1);  in pm860x_led_set()
80 		if (led->iset) {  in pm860x_led_set()
81 			pm860x_set_bits(led->i2c, led->reg_control,  in pm860x_led_set()
82 					LED_CURRENT_MASK, led->iset);  in pm860x_led_set()
84 		pm860x_set_bits(led->i2c, led->reg_blink,  in pm860x_led_set()
86 		pm860x_set_bits(led->i2c, PM8606_WLED3B, led->blink_mask,  in pm860x_led_set()
87 				led->blink_mask);  in pm860x_led_set()
89 	pm860x_set_bits(led->i2c, led->reg_control, LED_PWM_MASK,  in pm860x_led_set()
90 			led->brightness);  in pm860x_led_set()
92 	if (led->brightness == 0) {  in pm860x_led_set()
93 		pm860x_bulk_read(led->i2c, led->reg_control, 3, buf);  in pm860x_led_set()
98 			/* unset current since no led is lighting */  in pm860x_led_set()
99 			pm860x_set_bits(led->i2c, led->reg_control,  in pm860x_led_set()
101 			pm860x_set_bits(led->i2c, PM8606_WLED3B,  in pm860x_led_set()
102 					led->blink_mask, 0);  in pm860x_led_set()
103 			led_power_set(chip, led->port, 0);  in pm860x_led_set()
106 	led->current_brightness = led->brightness;  in pm860x_led_set()
107 	dev_dbg(chip->dev, "Update LED. (reg:%d, brightness:%d)\n",  in pm860x_led_set()
108 		led->reg_control, led->brightness);  in pm860x_led_set()
109 	mutex_unlock(&led->lock);  in pm860x_led_set()
121 	if (!dev_of_node(pdev->dev.parent))  in pm860x_led_dt_init()
122 		return -ENODEV;  in pm860x_led_dt_init()
123 	nproot = of_get_child_by_name(dev_of_node(pdev->dev.parent), "leds");  in pm860x_led_dt_init()
125 		dev_err(&pdev->dev, "failed to find leds node\n");  in pm860x_led_dt_init()
126 		return -ENODEV;  in pm860x_led_dt_init()
129 		if (of_node_name_eq(np, data->name)) {  in pm860x_led_dt_init()
130 			of_property_read_u32(np, "marvell,88pm860x-iset",  in pm860x_led_dt_init()
132 			data->iset = PM8606_LED_CURRENT(iset);  in pm860x_led_dt_init()
140 #define pm860x_led_dt_init(x, y)	(-1)
145 	struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);  in pm860x_led_probe()
146 	struct pm860x_led_pdata *pdata = dev_get_platdata(&pdev->dev);  in pm860x_led_probe()
151 	data = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_led), GFP_KERNEL);  in pm860x_led_probe()
153 		return -ENOMEM;  in pm860x_led_probe()
156 		dev_err(&pdev->dev, "No REG resource for control\n");  in pm860x_led_probe()
157 		return -ENXIO;  in pm860x_led_probe()
159 	data->reg_control = res->start;  in pm860x_led_probe()
162 		dev_err(&pdev->dev, "No REG resource for blink\n");  in pm860x_led_probe()
163 		return -ENXIO;  in pm860x_led_probe()
165 	data->reg_blink = res->start;  in pm860x_led_probe()
166 	memset(data->name, 0, MFD_NAME_SIZE);  in pm860x_led_probe()
167 	switch (pdev->id) {  in pm860x_led_probe()
169 		data->blink_mask = LED1_BLINK_EN;  in pm860x_led_probe()
170 		sprintf(data->name, "led0-red");  in pm860x_led_probe()
173 		data->blink_mask = LED1_BLINK_EN;  in pm860x_led_probe()
174 		sprintf(data->name, "led0-green");  in pm860x_led_probe()
177 		data->blink_mask = LED1_BLINK_EN;  in pm860x_led_probe()
178 		sprintf(data->name, "led0-blue");  in pm860x_led_probe()
180 	case 3:  in pm860x_led_probe()
181 		data->blink_mask = LED2_BLINK_EN;  in pm860x_led_probe()
182 		sprintf(data->name, "led1-red");  in pm860x_led_probe()
185 		data->blink_mask = LED2_BLINK_EN;  in pm860x_led_probe()
186 		sprintf(data->name, "led1-green");  in pm860x_led_probe()
189 		data->blink_mask = LED2_BLINK_EN;  in pm860x_led_probe()
190 		sprintf(data->name, "led1-blue");  in pm860x_led_probe()
193 	data->chip = chip;  in pm860x_led_probe()
194 	data->i2c = (chip->id == CHIP_PM8606) ? chip->client : chip->companion;  in pm860x_led_probe()
195 	data->port = pdev->id;  in pm860x_led_probe()
198 			data->iset = pdata->iset;  in pm860x_led_probe()
200 	data->current_brightness = 0;  in pm860x_led_probe()
201 	data->cdev.name = data->name;  in pm860x_led_probe()
202 	data->cdev.brightness_set_blocking = pm860x_led_set;  in pm860x_led_probe()
203 	mutex_init(&data->lock);  in pm860x_led_probe()
205 	ret = led_classdev_register(chip->dev, &data->cdev);  in pm860x_led_probe()
207 		dev_err(&pdev->dev, "Failed to register LED: %d\n", ret);  in pm860x_led_probe()
210 	pm860x_led_set(&data->cdev, 0);  in pm860x_led_probe()
221 	led_classdev_unregister(&data->cdev);  in pm860x_led_remove()
226 		.name	= "88pm860x-led",
234 MODULE_DESCRIPTION("LED driver for Marvell PM860x");
237 MODULE_ALIAS("platform:88pm860x-led");