platform/x86/siemens: simatic-ipc-batt: add support for module BX-59A

This is used for the Siemens Simatic IPC BX-59A, which
can monitor the voltage of the CMOS battery with two bits
that indicate low or empty state
Signed-off-by: xingtong.wu <xingtong.wu@siemens.com>
Link: https://lore.kernel.org/r/20230731072148.4781-1-xingtong_wu@163.comReviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/x86/siemens/Kconfig

@@ -54,6 +54,7 @@ config SIEMENS_SIMATIC_IPC_BATT_F7188X
 	tristate "CMOS Battery monitoring for Simatic IPCs based on Nuvoton GPIO"
 	default SIEMENS_SIMATIC_IPC_BATT
 	depends on GPIO_F7188X
+	depends on PINCTRL_ALDERLAKE
 	depends on SIEMENS_SIMATIC_IPC_BATT
 	help
 	  This option enables CMOS battery monitoring for Simatic Industrial PCs

drivers/platform/x86/siemens/simatic-ipc-batt-f7188x.c

@@ -17,6 +17,8 @@
 
 #include "simatic-ipc-batt.h"
 
+static struct gpiod_lookup_table *batt_lookup_table;
+
 static struct gpiod_lookup_table simatic_ipc_batt_gpio_table_227g = {
 	.table = {
 		GPIO_LOOKUP_IDX("gpio-f7188x-7", 6, NULL, 0, GPIO_ACTIVE_HIGH),
@@ -34,24 +36,39 @@ static struct gpiod_lookup_table simatic_ipc_batt_gpio_table_bx_39a = {
 	},
 };
 
+static struct gpiod_lookup_table simatic_ipc_batt_gpio_table_bx_59a = {
+	.table = {
+		GPIO_LOOKUP_IDX("gpio-f7188x-7", 6, NULL, 0, GPIO_ACTIVE_HIGH),
+		GPIO_LOOKUP_IDX("gpio-f7188x-7", 5, NULL, 1, GPIO_ACTIVE_HIGH),
+		GPIO_LOOKUP_IDX("INTC1056:00", 438, NULL, 2, GPIO_ACTIVE_HIGH),
+		{} /* Terminating entry */
+	}
+};
+
 static int simatic_ipc_batt_f7188x_remove(struct platform_device *pdev)
 {
-	const struct simatic_ipc_platform *plat = pdev->dev.platform_data;
-
-	if (plat->devmode == SIMATIC_IPC_DEVICE_227G)
-		return simatic_ipc_batt_remove(pdev, &simatic_ipc_batt_gpio_table_227g);
-
-	return simatic_ipc_batt_remove(pdev, &simatic_ipc_batt_gpio_table_bx_39a);
+	return simatic_ipc_batt_remove(pdev, batt_lookup_table);
 }
 
 static int simatic_ipc_batt_f7188x_probe(struct platform_device *pdev)
 {
 	const struct simatic_ipc_platform *plat = pdev->dev.platform_data;
 
-	if (plat->devmode == SIMATIC_IPC_DEVICE_227G)
-		return simatic_ipc_batt_probe(pdev, &simatic_ipc_batt_gpio_table_227g);
+	switch (plat->devmode) {
+	case SIMATIC_IPC_DEVICE_227G:
+		batt_lookup_table = &simatic_ipc_batt_gpio_table_227g;
+		break;
+	case SIMATIC_IPC_DEVICE_BX_39A:
+		batt_lookup_table = &simatic_ipc_batt_gpio_table_bx_39a;
+		break;
+	case SIMATIC_IPC_DEVICE_BX_59A:
+		batt_lookup_table = &simatic_ipc_batt_gpio_table_bx_59a;
+		break;
+	default:
+		return -ENODEV;
+	}
 
-	return simatic_ipc_batt_probe(pdev, &simatic_ipc_batt_gpio_table_bx_39a);
+	return simatic_ipc_batt_probe(pdev, batt_lookup_table);
 }
 
 static struct platform_driver simatic_ipc_batt_driver = {
@@ -66,5 +83,5 @@ module_platform_driver(simatic_ipc_batt_driver);
 
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:" KBUILD_MODNAME);
-MODULE_SOFTDEP("pre: simatic-ipc-batt gpio_f7188x platform:elkhartlake-pinctrl");
+MODULE_SOFTDEP("pre: simatic-ipc-batt gpio_f7188x platform:elkhartlake-pinctrl platform:alderlake-pinctrl");
 MODULE_AUTHOR("Henning Schild <henning.schild@siemens.com>");

drivers/platform/x86/siemens/simatic-ipc-batt.c

@@ -169,6 +169,7 @@ int simatic_ipc_batt_probe(struct platform_device *pdev, struct gpiod_lookup_tab
 	case SIMATIC_IPC_DEVICE_227G:
 	case SIMATIC_IPC_DEVICE_BX_39A:
 	case SIMATIC_IPC_DEVICE_BX_21A:
+	case SIMATIC_IPC_DEVICE_BX_59A:
 		table->dev_id = dev_name(dev);
 		gpiod_add_lookup_table(table);
 		break;
@@ -193,7 +194,7 @@ int simatic_ipc_batt_probe(struct platform_device *pdev, struct gpiod_lookup_tab
 
 	if (table->table[2].key) {
 		flags = GPIOD_OUT_HIGH;
-		if (priv.devmode == SIMATIC_IPC_DEVICE_BX_21A)
+		if (priv.devmode == SIMATIC_IPC_DEVICE_BX_21A || SIMATIC_IPC_DEVICE_BX_59A)
 			flags = GPIOD_OUT_LOW;
 		priv.gpios[2] = devm_gpiod_get_index(dev, "CMOSBattery meter", 2, flags);
 		if (IS_ERR(priv.gpios[2])) {