drivers: modem: hl78xx: reduce startup_ms and increase init chat timeout

The previous delay could cause missed URCs because the pipe and chat
layer were not yet attached when the modem started sending its first
messages (+KSUP). The modem boot takes ~1.8s, while the driver only
needs ~120ms to set up the interfaces, so reducing the delay ensures
the receiver is ready before the modem outputs any URCs.

Increase hl78xx_init_chat_script command limit from 10 to 100 to allow
longer initialization sequences.

Signed-off-by: Zafer SEN <[email protected]>

Author: zafersn

drivers/modem/hl78xx/Kconfig.hl78xx

@@ -801,14 +801,17 @@ config MODEM_HL78XX_DEV_RESET_PULSE_DURATION_MS
 
 config MODEM_HL78XX_DEV_STARTUP_TIME_MS
 	int "Wait before assuming the device is ready."
-	default 1000
+	default 120
 	help
-	  The expected time (in milliseconds) the modem needs to fully power on
-	  and become operational.
+	  The expected delay time (in milliseconds) the modem needs to fully power on
+	  and become operational.This delay before the driver opens the UART pipe
+	  and attaches the chat layer. The value must be long enough for the driver
+	  startup code to initialize, but short enough to ensure the pipe is ready
+	  before the modem sends its first URCs during boot.
 
 config MODEM_HL78XX_DEV_SHUTDOWN_TIME_MS
 	int "Wait before assuming the device is completely off."
-	default 1000
+	default 120
 	help
 	  The amount of time (in milliseconds) the system should wait for the modem
 	  to fully shut down

drivers/modem/hl78xx/hl78xx_chat.c

@@ -148,7 +148,7 @@ MODEM_CHAT_SCRIPT_CMDS_DEFINE(hl78xx_init_chat_script_cmds,
 			      MODEM_CHAT_SCRIPT_CMD_RESP("AT+CEREG=5", hl78xx_ok_match));
 
 MODEM_CHAT_SCRIPT_DEFINE(hl78xx_init_chat_script, hl78xx_init_chat_script_cmds,
-			 hl78xx_abort_matches, hl78xx_chat_callback_handler, 10);
+			 hl78xx_abort_matches, hl78xx_chat_callback_handler, 100);
 
 /* Post-restart script (moved from hl78xx.c) */
 MODEM_CHAT_SCRIPT_CMDS_DEFINE(hl78xx_post_restart_chat_script_cmds,