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drivers: led: add output current configuration to ti,lp5562

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Add Output current configuration for led channels to the TI lp5562 driver.

Signed-off-by: Rick Bruyninckx <xactme@gmail.com>
This commit is contained in:
Rick Bruyninckx 2024-03-14 08:52:01 +01:00 • committed by Anas Nashif
commit 9b0510cea9
2 changed files with 67 additions and 0 deletions
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45
drivers/led/lp5562.c
View file

@ -81,6 +81,10 @@ LOG_MODULE_REGISTER(lp5562);
#define LP5562_MIN_BRIGHTNESS 0 #define LP5562_MIN_BRIGHTNESS 0
#define LP5562_MAX_BRIGHTNESS 100 #define LP5562_MAX_BRIGHTNESS 100
/* Output current limits in 0.1 mA */
#define LP5562_MIN_CURRENT_SETTING 0
#define LP5562_MAX_CURRENT_SETTING 255
/* Values for ENABLE register. */ /* Values for ENABLE register. */
#define LP5562_ENABLE_CHIP_EN (1 << 6) #define LP5562_ENABLE_CHIP_EN (1 << 6)
#define LP5562_ENABLE_LOG_EN (1 << 7) #define LP5562_ENABLE_LOG_EN (1 << 7)
@ -159,6 +163,10 @@ enum lp5562_engine_fade_dirs {
struct lp5562_config { struct lp5562_config {
struct i2c_dt_spec bus; struct i2c_dt_spec bus;
uint8_t r_current;
uint8_t g_current;
uint8_t b_current;
uint8_t w_current;
}; };
struct lp5562_data { struct lp5562_data {
@ -895,11 +903,30 @@ static inline int lp5562_led_off(const struct device *dev, uint32_t led)
return lp5562_led_set_brightness(dev, led, dev_data->min_brightness); return lp5562_led_set_brightness(dev, led, dev_data->min_brightness);
} }
static int lp5562_led_update_current(const struct device *dev)
{
const struct lp5562_config *config = dev->config;
int ret;
uint8_t tx_buf[4] = {
LP5562_B_CURRENT,
config->b_current,
config->g_current,
config->r_current };
ret = i2c_write_dt(&config->bus, tx_buf, sizeof(tx_buf));
if (ret == 0) {
ret = i2c_reg_write_byte_dt(&config->bus, LP5562_W_CURRENT, config->w_current);
}
return ret;
}
static int lp5562_led_init(const struct device *dev) static int lp5562_led_init(const struct device *dev)
{ {
const struct lp5562_config *config = dev->config; const struct lp5562_config *config = dev->config;
struct lp5562_data *data = dev->data; struct lp5562_data *data = dev->data;
struct led_data *dev_data = &data->dev_data; struct led_data *dev_data = &data->dev_data;
int ret;
if (!device_is_ready(config->bus.bus)) { if (!device_is_ready(config->bus.bus)) {
LOG_ERR("I2C device not ready"); LOG_ERR("I2C device not ready");
@ -912,6 +939,12 @@ static int lp5562_led_init(const struct device *dev)
dev_data->min_brightness = LP5562_MIN_BRIGHTNESS; dev_data->min_brightness = LP5562_MIN_BRIGHTNESS;
dev_data->max_brightness = LP5562_MAX_BRIGHTNESS; dev_data->max_brightness = LP5562_MAX_BRIGHTNESS;
ret = lp5562_led_update_current(dev);
if (ret) {
LOG_ERR("Setting current setting LP5562 LED chip failed.");
return ret;
}
if (i2c_reg_write_byte_dt(&config->bus, LP5562_ENABLE, if (i2c_reg_write_byte_dt(&config->bus, LP5562_ENABLE,
LP5562_ENABLE_CHIP_EN)) { LP5562_ENABLE_CHIP_EN)) {
LOG_ERR("Enabling LP5562 LED chip failed."); LOG_ERR("Enabling LP5562 LED chip failed.");
@ -946,8 +979,20 @@ static const struct led_driver_api lp5562_led_api = {
}; };
#define LP5562_DEFINE(id) \ #define LP5562_DEFINE(id) \
BUILD_ASSERT(DT_INST_PROP(id, red_output_current) <= LP5562_MAX_CURRENT_SETTING,\
"Red channel current must be between 0 and 25.5 mA."); \
BUILD_ASSERT(DT_INST_PROP(id, green_output_current) <= LP5562_MAX_CURRENT_SETTING,\
"Green channel current must be between 0 and 25.5 mA."); \
BUILD_ASSERT(DT_INST_PROP(id, blue_output_current) <= LP5562_MAX_CURRENT_SETTING,\
"Blue channel current must be between 0 and 25.5 mA."); \
BUILD_ASSERT(DT_INST_PROP(id, white_output_current) <= LP5562_MAX_CURRENT_SETTING,\
"White channel current must be between 0 and 25.5 mA."); \
static const struct lp5562_config lp5562_config_##id = { \ static const struct lp5562_config lp5562_config_##id = { \
.bus = I2C_DT_SPEC_INST_GET(id), \ .bus = I2C_DT_SPEC_INST_GET(id), \
.r_current = DT_INST_PROP(id, red_output_current), \
.g_current = DT_INST_PROP(id, green_output_current), \
.b_current = DT_INST_PROP(id, blue_output_current), \
.w_current = DT_INST_PROP(id, white_output_current), \
}; \ }; \
\ \
struct lp5562_data lp5562_data_##id; \ struct lp5562_data lp5562_data_##id; \

22
dts/bindings/led/ti,lp5562.yaml
View file

@ -3,3 +3,25 @@ description: TI LP5562 LED
compatible: "ti,lp5562" compatible: "ti,lp5562"
include: i2c-device.yaml include: i2c-device.yaml
properties:
red-output-current:
type: int
default: 175
description: Output current of red channel in 0.1 mA (0-25.5 mA).
Default value is the power-on default. Valid range = 0 - 255
green-output-current:
type: int
default: 175
description: Output current of green channel in 0.1 mA (0-25.5 mA)
Default value is the power-on default. Valid range = 0 - 255
blue-output-current:
type: int
default: 175
description: Output current of blue channel in 0.1 mA (0-25.5 mA)
Default value is the power-on default. Valid range = 0 - 255
white-output-current:
type: int
default: 175
description: Output current of white channel in 0.1 mA (0-25.5 mA)
Default value is the power-on default. Valid range = 0 - 255