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modem: hl7800: fix UART shutdown

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Allow CTS line to determine UART shutdown for any sleep mode.
This allows lower average current consumption for LITE
HIBERNATE mode.

Signed-off-by: Ryan Erickson <ryan.erickson@lairdconnect.com>
This commit is contained in:
Ryan Erickson 2022-05-03 10:52:15 -05:00 • committed by Carles Cufí
commit ab9715031c
1 changed files with 8 additions and 10 deletions
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18
drivers/modem/hl7800.c
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@ -4698,8 +4698,6 @@ static void mdm_vgpio_work_cb(struct k_work *item)
ictx.desired_sleep_level == HL7800_SLEEP_LITE_HIBERNATE) { ictx.desired_sleep_level == HL7800_SLEEP_LITE_HIBERNATE) {
if (ictx.sleep_state != ictx.desired_sleep_level) { if (ictx.sleep_state != ictx.desired_sleep_level) {
set_sleep_state(ictx.desired_sleep_level); set_sleep_state(ictx.desired_sleep_level);
} else {
LOG_WRN("Unexpected sleep condition");
} }
} }
if (ictx.iface && ictx.initialized && net_if_is_up(ictx.iface) && if (ictx.iface && ictx.initialized && net_if_is_up(ictx.iface) &&
@ -4842,15 +4840,15 @@ void mdm_uart_cts_callback(const struct device *port, struct gpio_callback *cb,
} }
#ifdef CONFIG_MODEM_HL7800_LOW_POWER_MODE #ifdef CONFIG_MODEM_HL7800_LOW_POWER_MODE
if (ictx.desired_sleep_level == HL7800_SLEEP_SLEEP) { if (ictx.cts_state) {
if (ictx.cts_state) { /* HL7800 is not awake, shut down UART to save power */
/* HL7800 is not awake, shut down UART to save power */ if (ictx.allow_sleep) {
shutdown_uart(); shutdown_uart();
} else { }
power_on_uart(); } else {
if (ictx.sleep_state == HL7800_SLEEP_SLEEP) { power_on_uart();
allow_sleep(false); if (ictx.sleep_state == HL7800_SLEEP_SLEEP) {
} allow_sleep(false);
} }
} }
#endif #endif