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drivers: led: lp5562: Add PM Device support

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- Add PM_DEVICE support for power management

Signed-off-by: Anuj Pathak <anuj@croxel.com>
This commit is contained in:
Anuj Pathak 2024-08-27 09:30:41 +05:30 committed by Carles Cufí
parent c13eabb059
commit 1471c2f814
1 changed files with 54 additions and 8 deletions
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62
drivers/led/lp5562.c
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@ -35,6 +35,7 @@
#include <zephyr/drivers/gpio.h> #include <zephyr/drivers/gpio.h>
#include <zephyr/device.h> #include <zephyr/device.h>
#include <zephyr/kernel.h> #include <zephyr/kernel.h>
#include <zephyr/pm/device.h>
#define LOG_LEVEL CONFIG_LED_LOG_LEVEL #define LOG_LEVEL CONFIG_LED_LOG_LEVEL
#include <zephyr/logging/log.h> #include <zephyr/logging/log.h>
@ -937,7 +938,7 @@ static int lp5562_led_update_current(const struct device *dev)
return ret; return ret;
} }
static int lp5562_enable(const struct device *dev) static int lp5562_enable(const struct device *dev, bool soft_reset)
{ {
const struct lp5562_config *config = dev->config; const struct lp5562_config *config = dev->config;
const struct gpio_dt_spec *enable_gpio = &config->enable_gpio; const struct gpio_dt_spec *enable_gpio = &config->enable_gpio;
@ -958,11 +959,13 @@ static int lp5562_enable(const struct device *dev)
k_sleep(K_MSEC(1)); k_sleep(K_MSEC(1));
} }
/* Reset all internal registers to have a deterministic state. */ if (soft_reset) {
err = i2c_reg_write_byte_dt(&config->bus, LP5562_RESET, 0xFF); /* Reset all internal registers to have a deterministic state. */
if (err) { err = i2c_reg_write_byte_dt(&config->bus, LP5562_RESET, 0xFF);
LOG_ERR("%s: failed to soft-reset device", dev->name); if (err) {
return err; LOG_ERR("%s: failed to soft-reset device", dev->name);
return err;
}
} }
/* Set en bit in LP5562_ENABLE register. */ /* Set en bit in LP5562_ENABLE register. */
@ -977,6 +980,33 @@ static int lp5562_enable(const struct device *dev)
return 0; return 0;
} }
#ifdef CONFIG_PM_DEVICE
static int lp5562_disable(const struct device *dev)
{
const struct lp5562_config *config = dev->config;
const struct gpio_dt_spec *enable_gpio = &config->enable_gpio;
int err = 0;
/* clear en bit in register configurations */
err = i2c_reg_update_byte_dt(&config->bus, LP5562_ENABLE, LP5562_ENABLE_CHIP_EN_MASK,
LP5562_ENABLE_CHIP_EN_CLR);
if (err) {
LOG_ERR("%s: failed to clear EN Bit in ENABLE register", dev->name);
return err;
}
/* if gpio control is enabled, we can de-assert EN_GPIO now */
if (enable_gpio->port != NULL) {
err = gpio_pin_set_dt(enable_gpio, 0);
if (err) {
LOG_ERR("%s: failed to set enable GPIO to 0", dev->name);
return err;
}
}
return 0;
}
#endif
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;
@ -1001,7 +1031,7 @@ static int lp5562_led_init(const struct device *dev)
return -ENODEV; return -ENODEV;
} }
ret = lp5562_enable(dev); ret = lp5562_enable(dev, true);
if (ret) { if (ret) {
return ret; return ret;
} }
@ -1045,6 +1075,20 @@ static const struct led_driver_api lp5562_led_api = {
.off = lp5562_led_off, .off = lp5562_led_off,
}; };
#ifdef CONFIG_PM_DEVICE
static int lp5562_pm_action(const struct device *dev, enum pm_device_action action)
{
switch (action) {
case PM_DEVICE_ACTION_SUSPEND:
return lp5562_disable(dev);
case PM_DEVICE_ACTION_RESUME:
return lp5562_enable(dev, false);
default:
return -ENOTSUP;
}
}
#endif /* CONFIG_PM_DEVICE */
#define LP5562_DEFINE(id) \ #define LP5562_DEFINE(id) \
BUILD_ASSERT(DT_INST_PROP(id, red_output_current) <= LP5562_MAX_CURRENT_SETTING,\ BUILD_ASSERT(DT_INST_PROP(id, red_output_current) <= LP5562_MAX_CURRENT_SETTING,\
"Red channel current must be between 0 and 25.5 mA."); \ "Red channel current must be between 0 and 25.5 mA."); \
@ -1063,8 +1107,10 @@ static const struct led_driver_api lp5562_led_api = {
.enable_gpio = GPIO_DT_SPEC_INST_GET_OR(id, enable_gpios, {0}), \ .enable_gpio = GPIO_DT_SPEC_INST_GET_OR(id, enable_gpios, {0}), \
}; \ }; \
\ \
PM_DEVICE_DT_INST_DEFINE(id, lp5562_pm_action); \
\
struct lp5562_data lp5562_data_##id; \ struct lp5562_data lp5562_data_##id; \
DEVICE_DT_INST_DEFINE(id, &lp5562_led_init, NULL, \ DEVICE_DT_INST_DEFINE(id, &lp5562_led_init, PM_DEVICE_DT_INST_GET(id), \
&lp5562_data_##id, \ &lp5562_data_##id, \
&lp5562_config_##id, POST_KERNEL, \ &lp5562_config_##id, POST_KERNEL, \
CONFIG_LED_INIT_PRIORITY, \ CONFIG_LED_INIT_PRIORITY, \