platform/x86: simatic-ipc: use extra module loading for watchdog

We recently introduced a way to name additional modules to load for each
device. Use that instead of wdtmode to load the watchdog module. This
patch does not change behaviour, it is just style.
Signed-off-by: Henning Schild <henning.schild@siemens.com>
Link: https://lore.kernel.org/r/20230713144832.26473-4-henning.schild@siemens.comReviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/x86/simatic-ipc.c

@@ -33,7 +33,7 @@ static const struct dmi_system_id simatic_ipc_whitelist[] = {
 
 static struct simatic_ipc_platform platform_data;
 
-#define SIMATIC_IPC_MAX_EXTRA_MODULES 1
+#define SIMATIC_IPC_MAX_EXTRA_MODULES 2
 
 static struct {
 	u32 station_id;
@@ -44,40 +44,40 @@ static struct {
 } device_modes[] = {
 	{SIMATIC_IPC_IPC127E,
 		SIMATIC_IPC_DEVICE_127E, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_127E,
-		{ "emc1403" }},
+		{ "emc1403", NULL }},
 	{SIMATIC_IPC_IPC227D,
 		SIMATIC_IPC_DEVICE_227D, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_NONE,
-		{ "emc1403" }},
+		{ "emc1403", NULL }},
 	{SIMATIC_IPC_IPC227E,
 		SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_227E, SIMATIC_IPC_DEVICE_227E,
-		{ "emc1403" }},
+		{ "emc1403", NULL }},
 	{SIMATIC_IPC_IPC227G,
-		SIMATIC_IPC_DEVICE_227G, SIMATIC_IPC_DEVICE_227G, SIMATIC_IPC_DEVICE_227G,
-		{ "nct6775" }},
+		SIMATIC_IPC_DEVICE_227G, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_227G,
+		{ "nct6775", "w83627hf_wdt" }},
 	{SIMATIC_IPC_IPC277G,
-		SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_227G, SIMATIC_IPC_DEVICE_227G,
-		{ "nct6775" }},
+		SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_227G,
+		{ "nct6775", "w83627hf_wdt" }},
 	{SIMATIC_IPC_IPC277E,
 		SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_227E, SIMATIC_IPC_DEVICE_227E,
-		{ "emc1403" }},
+		{ "emc1403", NULL }},
 	{SIMATIC_IPC_IPC427D,
 		SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_NONE,
-		{ "emc1403" }},
+		{ "emc1403", NULL }},
 	{SIMATIC_IPC_IPC427E,
 		SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_NONE,
-		{ "emc1403" }},
+		{ "emc1403", NULL }},
 	{SIMATIC_IPC_IPC477E,
 		SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_NONE,
-		{ "emc1403" }},
+		{ "emc1403", NULL }},
 	{SIMATIC_IPC_IPCBX_39A,
-		SIMATIC_IPC_DEVICE_227G, SIMATIC_IPC_DEVICE_227G, SIMATIC_IPC_DEVICE_BX_39A,
-		{ "nct6775" }},
+		SIMATIC_IPC_DEVICE_227G, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_BX_39A,
+		{ "nct6775", "w83627hf_wdt" }},
 	{SIMATIC_IPC_IPCPX_39A,
-		SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_227G, SIMATIC_IPC_DEVICE_BX_39A,
-		{ "nct6775" }},
+		SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_BX_39A,
+		{ "nct6775", "w83627hf_wdt" }},
 	{SIMATIC_IPC_IPCBX_21A,
 		SIMATIC_IPC_DEVICE_BX_21A, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_BX_21A,
-		{ "emc1403" }},
+		{ "emc1403", NULL }},
 };
 
 static int register_platform_devices(u32 station_id)
@@ -138,11 +138,6 @@ static int register_platform_devices(u32 station_id)
 			 ipc_led_platform_device->name);
 	}
 
-	if (wdtmode == SIMATIC_IPC_DEVICE_227G) {
-		request_module("w83627hf_wdt");
-		return 0;
-	}
-
 	if (wdtmode != SIMATIC_IPC_DEVICE_NONE) {
 		platform_data.devmode = wdtmode;
 		ipc_wdt_platform_device =
@@ -158,7 +153,8 @@ static int register_platform_devices(u32 station_id)
 	}
 
 	if (ledmode == SIMATIC_IPC_DEVICE_NONE &&
-	    wdtmode == SIMATIC_IPC_DEVICE_NONE) {
+	    wdtmode == SIMATIC_IPC_DEVICE_NONE &&
+	    battmode == SIMATIC_IPC_DEVICE_NONE) {
 		pr_warn("unsupported IPC detected, station id=%08x\n",
 			station_id);
 		return -EINVAL;