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drivers: nrf: Add power management to uarte shim

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Adds power management to uarte shim.

Fixes 12501

Signed-off-by: Mieszko Mierunski <mieszko.mierunski@nordicsemi.no>
This commit is contained in:
Mieszko Mierunski 2019-03-21 13:41:25 +01:00 • committed by Anas Nashif
commit 0b2946f4f3
1 changed files with 62 additions and 8 deletions
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70
drivers/serial/uart_nrfx_uarte.c
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@ -102,6 +102,9 @@ struct uarte_nrfx_data {
#endif
#ifdef CONFIG_UART_ASYNC_API
struct uarte_async_cb *async;
#endif
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
u32_t pm_state;
#endif
u8_t rx_data;
};
@ -1134,6 +1137,10 @@ static int uarte_instance_init(struct device *dev,
return err;
}
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
data->pm_state = DEVICE_PM_ACTIVE_STATE;
#endif
#ifdef UARTE_INTERRUPT_DRIVEN
if (interrupts_active) {
/* Set ENDTX event by requesting fake (zero-length) transfer.
@ -1165,6 +1172,52 @@ static int uarte_instance_init(struct device *dev,
return 0;
}
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
static void uarte_nrfx_set_power_state(struct device *dev, u32_t new_state)
{
NRF_UARTE_Type *uarte = get_uarte_instance(dev);
if (new_state == DEVICE_PM_ACTIVE_STATE) {
nrf_uarte_enable(uarte);
#ifdef CONFIG_UART_ASYNC_API
if (get_dev_data(dev)->async) {
return;
}
#endif
nrf_uarte_task_trigger(uarte, NRF_UARTE_TASK_STARTRX);
} else {
assert(new_state == DEVICE_PM_LOW_POWER_STATE ||
new_state == DEVICE_PM_SUSPEND_STATE ||
new_state == DEVICE_PM_OFF_STATE);
nrf_uarte_disable(uarte);
}
}
static int uarte_nrfx_pm_control(struct device *dev, u32_t ctrl_command,
void *context, device_pm_cb cb, void *arg)
{
struct uarte_nrfx_data *data = get_dev_data(dev);
if (ctrl_command == DEVICE_PM_SET_POWER_STATE) {
u32_t new_state = *((const u32_t *)context);
if (new_state != data->pm_state) {
uarte_nrfx_set_power_state(dev, new_state);
data->pm_state = new_state;
}
} else {
assert(ctrl_command == DEVICE_PM_GET_POWER_STATE);
*((u32_t *)context) = data->pm_state;
}
if (cb) {
cb(dev, 0, context, arg);
}
return 0;
}
#endif /* CONFIG_DEVICE_POWER_MANAGEMENT */
#define UART_NRF_UARTE_DEVICE(idx) \
DEVICE_DECLARE(uart_nrfx_uarte##idx); \
UARTE_INT_DRIVEN(idx); \
@ -1215,14 +1268,15 @@ static int uarte_instance_init(struct device *dev,
&init_config, \
IS_ENABLED(CONFIG_UART_##idx##_INTERRUPT_DRIVEN)); \
} \
DEVICE_AND_API_INIT(uart_nrfx_uarte##idx, \
DT_NORDIC_NRF_UARTE_UART_##idx##_LABEL, \
uarte_##idx##_init, \
&uarte_##idx##_data, \
&uarte_##idx##_config, \
PRE_KERNEL_1, \
CONFIG_KERNEL_INIT_PRIORITY_DEVICE, \
&uart_nrfx_uarte_driver_api)
DEVICE_DEFINE(uart_nrfx_uarte##idx, \
DT_NORDIC_NRF_UARTE_UART_##idx##_LABEL, \
uarte_##idx##_init, \
uarte_nrfx_pm_control, \
&uarte_##idx##_data, \
&uarte_##idx##_config, \
PRE_KERNEL_1, \
CONFIG_KERNEL_INIT_PRIORITY_DEVICE, \
&uart_nrfx_uarte_driver_api)
#define UARTE_CONFIG(idx) \
.uart_config = { \