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driver: modem: add simple power management to modem receiver

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As modem receiver is using UART, it requires disabling
of the UART and its callbacks to save power.
This adds simple sleep/wake functions which should be
called from defined device_pm functions in modem drivers later.

Signed-off-by: Christoph Schramm <schramm@makaio.com>
This commit is contained in:
Christoph Schramm 2019-06-07 17:51:30 +02:00 • committed by Carles Cufí
commit ce4cc465fc
2 changed files with 23 additions and 0 deletions
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19
drivers/modem/modem_receiver.c
View file

@ -193,6 +193,25 @@ int mdm_receiver_send(struct mdm_receiver_context *ctx,
return 0;
}
int mdm_receiver_sleep(struct mdm_receiver_context *ctx)
{
uart_irq_rx_disable(ctx->uart_dev);
#ifdef DEVICE_PM_LOW_POWER_STATE
device_set_power_state(ctx->uart_dev, DEVICE_PM_LOW_POWER_STATE, NULL, NULL);
#endif
return 0;
}
int mdm_receiver_wake(struct mdm_receiver_context *ctx)
{
#ifdef DEVICE_PM_LOW_POWER_STATE
device_set_power_state(ctx->uart_dev, DEVICE_PM_ACTIVE_STATE, NULL, NULL);
#endif
uart_irq_rx_enable(ctx->uart_dev);
return 0;
}
int mdm_receiver_register(struct mdm_receiver_context *ctx,
const char *uart_dev_name,
u8_t *buf, size_t size)

4
drivers/modem/modem_receiver.h
View file

@ -86,6 +86,10 @@ int mdm_receiver_register(struct mdm_receiver_context *ctx,
const char *uart_dev_name,
u8_t *buf, size_t size);
int mdm_receiver_sleep(struct mdm_receiver_context *ctx);
int mdm_receiver_wake(struct mdm_receiver_context *ctx);
#ifdef __cplusplus
}
#endif