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input: gpio_keys: add power management support

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Add power management support to the gpio keys driver. When in suspend,
disable all the button gpios and interrupts.

Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
This commit is contained in:
Fabio Baltieri 2023-12-15 18:20:50 +00:00 • committed by Carles Cufí
commit cc5cef8179
1 changed files with 59 additions and 3 deletions
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62
drivers/input/input_gpio_keys.c
View file

@ -11,6 +11,8 @@
#include <zephyr/input/input.h>
#include <zephyr/kernel.h>
#include <zephyr/logging/log.h>
#include <zephyr/pm/device.h>
#include <zephyr/pm/device_runtime.h>
LOG_MODULE_REGISTER(gpio_keys, CONFIG_INPUT_LOG_LEVEL);
@ -138,9 +140,57 @@ static int gpio_keys_init(const struct device *dev)
}
}
ret = pm_device_runtime_enable(dev);
if (ret < 0) {
LOG_ERR("Failed to enable runtime power management");
return ret;
}
return 0;
}
#ifdef CONFIG_PM_DEVICE
static int gpio_keys_pm_action(const struct device *dev,
enum pm_device_action action)
{
const struct gpio_keys_config *cfg = dev->config;
gpio_flags_t gpio_flags;
gpio_flags_t int_flags;
int ret;
switch (action) {
case PM_DEVICE_ACTION_SUSPEND:
gpio_flags = GPIO_DISCONNECTED;
int_flags = GPIO_INT_DISABLE;
break;
case PM_DEVICE_ACTION_RESUME:
gpio_flags = GPIO_INPUT;
int_flags = GPIO_INT_EDGE_BOTH;
break;
default:
return -ENOTSUP;
}
for (int i = 0; i < cfg->num_keys; i++) {
const struct gpio_dt_spec *gpio = &cfg->pin_cfg[i].spec;
ret = gpio_pin_configure_dt(gpio, gpio_flags);
if (ret != 0) {
LOG_ERR("Pin %d configuration failed: %d", i, ret);
return ret;
}
ret = gpio_pin_interrupt_configure_dt(gpio, int_flags);
if (ret < 0) {
LOG_ERR("interrupt configuration failed: %d", ret);
return ret;
}
}
return 0;
}
#endif
#define GPIO_KEYS_CFG_CHECK(node_id) \
BUILD_ASSERT(DT_NODE_HAS_PROP(node_id, zephyr_code), \
"zephyr-code must be specified to use the input-gpio-keys driver");
@ -153,17 +203,23 @@ static int gpio_keys_init(const struct device *dev)
#define GPIO_KEYS_INIT(i) \
DT_INST_FOREACH_CHILD_STATUS_OKAY(i, GPIO_KEYS_CFG_CHECK); \
\
static const struct gpio_keys_pin_config gpio_keys_pin_config_##i[] = { \
DT_INST_FOREACH_CHILD_STATUS_OKAY_SEP(i, GPIO_KEYS_CFG_DEF, (,))}; \
\
static const struct gpio_keys_config gpio_keys_config_##i = { \
.debounce_interval_ms = DT_INST_PROP(i, debounce_interval_ms), \
.num_keys = ARRAY_SIZE(gpio_keys_pin_config_##i), \
.pin_cfg = gpio_keys_pin_config_##i, \
}; \
\
static struct gpio_keys_pin_data \
gpio_keys_pin_data_##i[ARRAY_SIZE(gpio_keys_pin_config_##i)]; \
DEVICE_DT_INST_DEFINE(i, &gpio_keys_init, NULL, gpio_keys_pin_data_##i, \
&gpio_keys_config_##i, POST_KERNEL, CONFIG_INPUT_INIT_PRIORITY, \
NULL);
\
PM_DEVICE_DT_INST_DEFINE(n, gpio_keys_pm_action); \
\
DEVICE_DT_INST_DEFINE(i, &gpio_keys_init, PM_DEVICE_DT_INST_GET(n), \
gpio_keys_pin_data_##i, &gpio_keys_config_##i, \
POST_KERNEL, CONFIG_INPUT_INIT_PRIORITY, NULL);
DT_INST_FOREACH_STATUS_OKAY(GPIO_KEYS_INIT)