2  * Copyright 2022-2023 Daniel DeGrasse <daniel@degrasse.com>
4  * SPDX-License-Identifier: Apache-2.0
10 #include <zephyr/drivers/led.h>
13 #include <zephyr/drivers/led/is31fl3733.h>
20 #define CMD_SEL_LED		0x0  /* LED configuration page */
36 #define GLOBAL_CURRENT_CTRL_REG 0x1 /* global current control register */
60 	/* LED config reg state, IS31FL3733 conf reg is write only */
70 	const struct is31fl3733_config *config = dev->config;  in is31fl3733_select_page()
71 	struct is31fl3733_data *data = dev->data;  in is31fl3733_select_page()
74 	if (data->selected_page == page) {  in is31fl3733_select_page()
80 	ret = i2c_reg_write_byte_dt(&config->bus, CMD_LOCK_REG, CMD_LOCK_UNLOCK);  in is31fl3733_select_page()
87 	ret = i2c_reg_write_byte_dt(&config->bus, CMD_SEL_REG, page);  in is31fl3733_select_page()
92 	data->selected_page = page;  in is31fl3733_select_page()
97 static int is31fl3733_led_set_brightness(const struct device *dev, uint32_t led, uint8_t value)  in is31fl3733_led_set_brightness()  argument
99 	const struct is31fl3733_config *config = dev->config;  in is31fl3733_led_set_brightness()
103 	if (led >= IS31FL3733_MAX_LED) {  in is31fl3733_led_set_brightness()
104 		return -EINVAL;  in is31fl3733_led_set_brightness()
113 	return i2c_reg_write_byte_dt(&config->bus, led, led_brightness);  in is31fl3733_led_set_brightness()
116 static int is31fl3733_led_on(const struct device *dev, uint32_t led)  in is31fl3733_led_on()  argument
118 	return is31fl3733_led_set_brightness(dev, led, IS31FL3733_MAX_BRIGHTNESS);  in is31fl3733_led_on()
121 static int is31fl3733_led_off(const struct device *dev, uint32_t led)  in is31fl3733_led_off()  argument
123 	return is31fl3733_led_set_brightness(dev, led, 0);  in is31fl3733_led_off()
129 	const struct is31fl3733_config *config = dev->config;  in is31fl3733_led_write_channels()
130 	struct is31fl3733_data *data = dev->data;  in is31fl3733_led_write_channels()
135 		return -EINVAL;  in is31fl3733_led_write_channels()
137 	pwm_start = data->scratch_buf + start_channel;  in is31fl3733_led_write_channels()
138 	/* Set PWM and LED target registers as first byte of each transfer */  in is31fl3733_led_write_channels()
142 	/* Write LED PWM states */  in is31fl3733_led_write_channels()
149 	return i2c_write_dt(&config->bus, pwm_start, num_channels + 1);  in is31fl3733_led_write_channels()
154 	const struct is31fl3733_config *config = dev->config;  in is31fl3733_init()
155 	struct is31fl3733_data *data = dev->data;  in is31fl3733_init()
159 	if (!i2c_is_ready_dt(&config->bus)) {  in is31fl3733_init()
161 		return -ENODEV;  in is31fl3733_init()
163 	if (config->sdb.port != NULL) {  in is31fl3733_init()
164 		if (!gpio_is_ready_dt(&config->sdb)) {  in is31fl3733_init()
166 			return -ENODEV;  in is31fl3733_init()
169 		ret = gpio_pin_configure_dt(&config->sdb, GPIO_OUTPUT_ACTIVE);  in is31fl3733_init()
183 	ret = i2c_reg_read_byte_dt(&config->bus, RESET_REG, &dummy);  in is31fl3733_init()
188 	/* Select function page after LED controller reset */  in is31fl3733_init()
193 	/* Set global current control register based off devicetree value */  in is31fl3733_init()
194 	ret = i2c_reg_write_byte_dt(&config->bus, GLOBAL_CURRENT_CTRL_REG,  in is31fl3733_init()
195 				config->current_limit);  in is31fl3733_init()
200 	 * blanking. We also set the LED controller sync mode here.  in is31fl3733_init()
202 	data->conf_reg = (config->sync << CONF_REG_SYNC_SHIFT) | CONF_REG_SSD_MASK;  in is31fl3733_init()
203 	ret = i2c_reg_write_byte_dt(&config->bus, CONF_REG, data->conf_reg);  in is31fl3733_init()
208 	/* Enable all LEDs. We only control LED brightness in this driver. */  in is31fl3733_init()
209 	data->scratch_buf[0] = 0x0;  in is31fl3733_init()
210 	memset(data->scratch_buf + 1, 0xFF, (IS31FL3733_MAX_LED / 8));  in is31fl3733_init()
216 	return i2c_write_dt(&config->bus, data->scratch_buf,  in is31fl3733_init()
223  * @brief Blanks IS31FL3733 LED display.
225  * When blank_en is set, the LED display will be disabled. This can be used for
226  * flicker-free display updates, or power saving.
228  * @param dev: LED device structure
234 	const struct is31fl3733_config *config = dev->config;  in is31fl3733_blank()
235 	struct is31fl3733_data *data = dev->data;  in is31fl3733_blank()
244 		data->conf_reg &= ~CONF_REG_SSD_MASK;  in is31fl3733_blank()
246 		data->conf_reg |= CONF_REG_SSD_MASK;  in is31fl3733_blank()
249 	return i2c_reg_write_byte_dt(&config->bus, CONF_REG, data->conf_reg);  in is31fl3733_blank()
253  * @brief Sets led current limit
255  * Sets the current limit for the LED driver. This is a separate value
256  * from per-led brightness, and applies to all LEDs.
257  * This value sets the output current limit according
260  * @param dev: LED device structure
261  * @param limit: current limit to apply
266 	const struct is31fl3733_config *config = dev->config;  in is31fl3733_current_limit()
274 	/* Set global current control register */  in is31fl3733_current_limit()
275 	return i2c_reg_write_byte_dt(&config->bus, GLOBAL_CURRENT_CTRL_REG, limit);  in is31fl3733_current_limit()
278 static DEVICE_API(led, is31fl3733_api) = {