2  * Copyright (c) 2018 Savoir-Faire Linux.
4  * SPDX-License-Identifier: Apache-2.0
11  * @brief LED driver for the PCA9633 I2C LED driver (7-bit slave address 0x62)
15 #include <zephyr/drivers/led.h>
25 /* PCA9633 select registers determine the source that drives LED outputs */
26 #define PCA9633_LED_OFF         0x0     /* LED driver off */
27 #define PCA9633_LED_ON          0x1     /* LED driver on */
34 #define PCA9633_PWM_BASE        0x02	/* Reg 0x02-0x05 for brightness control LED01-04 */
56 static int pca9633_led_blink(const struct device *dev, uint32_t led,  in pca9633_led_blink()  argument
59 	struct pca9633_data *data = dev->data;  in pca9633_led_blink()
60 	const struct pca9633_config *config = dev->config;  in pca9633_led_blink()
61 	struct led_data *dev_data = &data->dev_data;  in pca9633_led_blink()
67 	if (period < dev_data->min_period || period > dev_data->max_period) {  in pca9633_led_blink()
68 		return -EINVAL;  in pca9633_led_blink()
73 	 * duty cycle = (GDC / 256) ->  in pca9633_led_blink()
74 	 *	(time_on / period) = (GDC / 256) ->  in pca9633_led_blink()
78 	if (i2c_reg_write_byte_dt(&config->i2c,  in pca9633_led_blink()
81 		LOG_ERR("LED reg write failed");  in pca9633_led_blink()
82 		return -EIO;  in pca9633_led_blink()
88 	 * So, period (in ms) = (((GFRQ + 1) / 24) * 1000) ->  in pca9633_led_blink()
89 	 *		GFRQ = ((period * 24 / 1000) - 1)  in pca9633_led_blink()
91 	gfrq = (period * 24U / 1000) - 1;  in pca9633_led_blink()
92 	if (i2c_reg_write_byte_dt(&config->i2c,  in pca9633_led_blink()
95 		LOG_ERR("LED reg write failed");  in pca9633_led_blink()
96 		return -EIO;  in pca9633_led_blink()
100 	if (i2c_reg_update_byte_dt(&config->i2c,  in pca9633_led_blink()
104 		LOG_ERR("LED reg update failed");  in pca9633_led_blink()
105 		return -EIO;  in pca9633_led_blink()
108 	/* Select the GRPPWM source to drive the LED output */  in pca9633_led_blink()
109 	if (i2c_reg_update_byte_dt(&config->i2c,  in pca9633_led_blink()
111 				PCA9633_MASK << (led << 1),  in pca9633_led_blink()
112 				PCA9633_LED_GRP_PWM << (led << 1))) {  in pca9633_led_blink()
113 		LOG_ERR("LED reg update failed");  in pca9633_led_blink()
114 		return -EIO;  in pca9633_led_blink()
120 static int pca9633_led_set_brightness(const struct device *dev, uint32_t led,  in pca9633_led_set_brightness()  argument
123 	const struct pca9633_config *config = dev->config;  in pca9633_led_set_brightness()
124 	struct pca9633_data *data = dev->data;  in pca9633_led_set_brightness()
125 	struct led_data *dev_data = &data->dev_data;  in pca9633_led_set_brightness()
128 	if (value < dev_data->min_brightness ||  in pca9633_led_set_brightness()
129 	    value > dev_data->max_brightness) {  in pca9633_led_set_brightness()
130 		return -EINVAL;  in pca9633_led_set_brightness()
133 	/* Set the LED brightness value */  in pca9633_led_set_brightness()
134 	val = (value * 255U) / dev_data->max_brightness;  in pca9633_led_set_brightness()
135 	if (i2c_reg_write_byte_dt(&config->i2c,  in pca9633_led_set_brightness()
136 			       PCA9633_PWM_BASE + led,  in pca9633_led_set_brightness()
138 		LOG_ERR("LED reg write failed");  in pca9633_led_set_brightness()
139 		return -EIO;  in pca9633_led_set_brightness()
142 	/* Set the LED driver to be controlled through its PWMx register. */  in pca9633_led_set_brightness()
143 	if (i2c_reg_update_byte_dt(&config->i2c,  in pca9633_led_set_brightness()
145 				PCA9633_MASK << (led << 1),  in pca9633_led_set_brightness()
146 				PCA9633_LED_PWM << (led << 1))) {  in pca9633_led_set_brightness()
147 		LOG_ERR("LED reg update failed");  in pca9633_led_set_brightness()
148 		return -EIO;  in pca9633_led_set_brightness()
154 static inline int pca9633_led_on(const struct device *dev, uint32_t led)  in pca9633_led_on()  argument
156 	const struct pca9633_config *config = dev->config;  in pca9633_led_on()
158 	/* Set LED state to ON */  in pca9633_led_on()
159 	if (i2c_reg_update_byte_dt(&config->i2c,  in pca9633_led_on()
161 				PCA9633_MASK << (led << 1),  in pca9633_led_on()
162 				PCA9633_LED_ON << (led << 1))) {  in pca9633_led_on()
163 		LOG_ERR("LED reg update failed");  in pca9633_led_on()
164 		return -EIO;  in pca9633_led_on()
170 static inline int pca9633_led_off(const struct device *dev, uint32_t led)  in pca9633_led_off()  argument
172 	const struct pca9633_config *config = dev->config;  in pca9633_led_off()
174 	/* Set LED state to OFF */  in pca9633_led_off()
175 	if (i2c_reg_update_byte_dt(&config->i2c,  in pca9633_led_off()
177 				PCA9633_MASK << (led << 1),  in pca9633_led_off()
179 		LOG_ERR("LED reg update failed");  in pca9633_led_off()
180 		return -EIO;  in pca9633_led_off()
188 	const struct pca9633_config *config = dev->config;  in pca9633_led_init()
189 	struct pca9633_data *data = dev->data;  in pca9633_led_init()
190 	struct led_data *dev_data = &data->dev_data;  in pca9633_led_init()
192 	if (!device_is_ready(config->i2c.bus)) {  in pca9633_led_init()
194 		return -ENODEV;  in pca9633_led_init()
198 	 * Take the LED driver out from Sleep mode and disable All Call Address  in pca9633_led_init()
202 		    &config->i2c, PCA9633_MODE1,  in pca9633_led_init()
203 		    config->disable_allcall ? PCA9633_MODE1_SLEEP | PCA9633_MODE1_ALLCAL  in pca9633_led_init()
205 		    config->disable_allcall ? ~(PCA9633_MODE1_SLEEP | PCA9633_MODE1_ALLCAL)  in pca9633_led_init()
207 		LOG_ERR("LED reg update failed");  in pca9633_led_init()
208 		return -EIO;  in pca9633_led_init()
211 	dev_data->min_period = 41U;  in pca9633_led_init()
212 	dev_data->max_period = 10667U;  in pca9633_led_init()
213 	dev_data->min_brightness = 0U;  in pca9633_led_init()
214 	dev_data->max_brightness = 100U;  in pca9633_led_init()