modem: modem_cellular: assert reset pin for duration

JordanYates · jhedberg · commit b5177b159ac7 · 2025-10-03T12:49:47.000+03:00
Assert the reset pin for the duration specified by the modem
(`reset_pulse_duration_ms`) when booting, instead of immediately
de-asserting the pin.

Signed-off-by: Jordan Yates &lt;jordan@embeint.com&gt;
diff --git a/drivers/modem/modem_cellular.c b/drivers/modem/modem_cellular.c
@@ -790,13 +790,13 @@ static void modem_cellular_idle_event_handler(struct modem_cellular_data *data,
 			break;
 		}
 
-		if (modem_cellular_gpio_is_enabled(&config->power_gpio)) {
-			modem_cellular_enter_state(data, MODEM_CELLULAR_STATE_POWER_ON_PULSE);
+		if (modem_cellular_gpio_is_enabled(&config->reset_gpio)) {
+			modem_cellular_enter_state(data, MODEM_CELLULAR_STATE_RESET_PULSE);
 			break;
 		}
 
-		if (modem_cellular_gpio_is_enabled(&config->reset_gpio)) {
-			modem_cellular_enter_state(data, MODEM_CELLULAR_STATE_AWAIT_POWER_ON);
+		if (modem_cellular_gpio_is_enabled(&config->power_gpio)) {
+			modem_cellular_enter_state(data, MODEM_CELLULAR_STATE_POWER_ON_PULSE);
 			break;
 		}
 

Original file line number	Diff line number	Diff line change
`@@ -790,13 +790,13 @@ static void modem_cellular_idle_event_handler(struct modem_cellular_data *data,`
`790`	`790`	`break;`
`791`	`791`	`}`
`792`	`792`
`793`		`- if (modem_cellular_gpio_is_enabled(&config->power_gpio)) {`
`794`		`- modem_cellular_enter_state(data, MODEM_CELLULAR_STATE_POWER_ON_PULSE);`
	`793`	`+ if (modem_cellular_gpio_is_enabled(&config->reset_gpio)) {`
	`794`	`+ modem_cellular_enter_state(data, MODEM_CELLULAR_STATE_RESET_PULSE);`
`795`	`795`	`break;`
`796`	`796`	`}`
`797`	`797`
`798`		`- if (modem_cellular_gpio_is_enabled(&config->reset_gpio)) {`
`799`		`- modem_cellular_enter_state(data, MODEM_CELLULAR_STATE_AWAIT_POWER_ON);`
	`798`	`+ if (modem_cellular_gpio_is_enabled(&config->power_gpio)) {`
	`799`	`+ modem_cellular_enter_state(data, MODEM_CELLULAR_STATE_POWER_ON_PULSE);`
`800`	`800`	`break;`
`801`	`801`	`}`
`802`	`802`