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drivers: i2c: ambiq: optimize ambiq i2c device pm

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This commit optimizes the device pm for ambiq i2c driver
by adding pinctrl sleep/resume.

Signed-off-by: Hao Luo <hluo@ambiq.com>
This commit is contained in:
Hao Luo 2025-06-05 09:47:37 +08:00 • committed by Benjamin Cabé
commit 37134f5a4e
1 changed files with 16 additions and 1 deletions
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17
drivers/i2c/i2c_ambiq.c
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@ -428,15 +428,30 @@ static DEVICE_API(i2c, i2c_ambiq_driver_api) = {
#ifdef CONFIG_PM_DEVICE #ifdef CONFIG_PM_DEVICE
static int i2c_ambiq_pm_action(const struct device *dev, enum pm_device_action action) static int i2c_ambiq_pm_action(const struct device *dev, enum pm_device_action action)
{ {
const struct i2c_ambiq_config *config = dev->config;
struct i2c_ambiq_data *data = dev->data; struct i2c_ambiq_data *data = dev->data;
uint32_t ret; int ret;
am_hal_sysctrl_power_state_e status; am_hal_sysctrl_power_state_e status;
switch (action) { switch (action) {
case PM_DEVICE_ACTION_RESUME: case PM_DEVICE_ACTION_RESUME:
/* Move pins to active/default state */
ret = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_DEFAULT);
if (ret < 0) {
LOG_ERR("I2C pinctrl setup failed (%d)", ret);
return ret;
}
status = AM_HAL_SYSCTRL_WAKE; status = AM_HAL_SYSCTRL_WAKE;
break; break;
case PM_DEVICE_ACTION_SUSPEND: case PM_DEVICE_ACTION_SUSPEND:
/* Move pins to sleep state */
ret = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_SLEEP);
if (ret == -ENOENT) {
/* Warn but don't block suspend */
LOG_WRN("I2C pinctrl sleep state not available ");
} else if (ret < 0) {
return ret;
}
status = AM_HAL_SYSCTRL_DEEPSLEEP; status = AM_HAL_SYSCTRL_DEEPSLEEP;
break; break;
default: default: