usb: gadget: pch_udc: Use PCI sub IDs instead of DMI

We don't need DMI to identify Intel Minnowboard (v1) since it has
properly set PCI sub IDs. So, drop unneeded DMI level of identification.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210325135508.70350-3-andriy.shevchenko@linux.intel.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/gadget/udc/pch_udc.c

@@ -7,7 +7,6 @@
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/delay.h>
-#include <linux/dmi.h>
 #include <linux/errno.h>
 #include <linux/gpio/consumer.h>
 #include <linux/gpio/machine.h>
@@ -1356,43 +1355,6 @@ static irqreturn_t pch_vbus_gpio_irq(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-static struct gpiod_lookup_table minnowboard_udc_gpios = {
-	.dev_id		= "0000:02:02.4",
-	.table		= {
-		GPIO_LOOKUP("sch_gpio.33158", 12, NULL, GPIO_ACTIVE_HIGH),
-		{}
-	},
-};
-
-static const struct dmi_system_id pch_udc_gpio_dmi_table[] = {
-	{
-		.ident = "MinnowBoard",
-		.matches = {
-			DMI_MATCH(DMI_BOARD_NAME, "MinnowBoard"),
-		},
-		.driver_data = &minnowboard_udc_gpios,
-	},
-	{ }
-};
-
-static void pch_vbus_gpio_remove_table(void *table)
-{
-	gpiod_remove_lookup_table(table);
-}
-
-static int pch_vbus_gpio_add_table(struct pch_udc_dev *dev)
-{
-	struct device *d = &dev->pdev->dev;
-	const struct dmi_system_id *dmi;
-
-	dmi = dmi_first_match(pch_udc_gpio_dmi_table);
-	if (!dmi)
-		return 0;
-
-	gpiod_add_lookup_table(dmi->driver_data);
-	return devm_add_action_or_reset(d, pch_vbus_gpio_remove_table, dmi->driver_data);
-}
-
 /**
  * pch_vbus_gpio_init() - This API initializes GPIO port detecting VBUS.
  * @dev:		Reference to the driver structure
@@ -1411,10 +1373,6 @@ static int pch_vbus_gpio_init(struct pch_udc_dev *dev)
 	dev->vbus_gpio.port = NULL;
 	dev->vbus_gpio.intr = 0;
 
-	err = pch_vbus_gpio_add_table(dev);
-	if (err)
-		return err;
-
 	/* Retrieve the GPIO line from the USB gadget device */
 	gpiod = devm_gpiod_get_optional(d, NULL, GPIOD_IN);
 	if (IS_ERR(gpiod))
@@ -2867,7 +2825,7 @@ static void pch_udc_pcd_reinit(struct pch_udc_dev *dev)
  *
  * Return codes:
  *	0:		Success
- *	-%ERRNO:	All kind of errors when retrieving VBUS GPIO
+ *	-ERRNO:		All kind of errors when retrieving VBUS GPIO
  */
 static int pch_udc_pcd_init(struct pch_udc_dev *dev)
 {
@@ -2978,6 +2936,30 @@ static int pch_udc_stop(struct usb_gadget *g)
 	return 0;
 }
 
+static void pch_vbus_gpio_remove_table(void *table)
+{
+	gpiod_remove_lookup_table(table);
+}
+
+static int pch_vbus_gpio_add_table(struct device *d, void *table)
+{
+	gpiod_add_lookup_table(table);
+	return devm_add_action_or_reset(d, pch_vbus_gpio_remove_table, table);
+}
+
+static struct gpiod_lookup_table pch_udc_minnow_vbus_gpio_table = {
+	.dev_id		= "0000:02:02.4",
+	.table		= {
+		GPIO_LOOKUP("sch_gpio.33158", 12, NULL, GPIO_ACTIVE_HIGH),
+		{}
+	},
+};
+
+static int pch_udc_minnow_platform_init(struct device *d)
+{
+	return pch_vbus_gpio_add_table(d, &pch_udc_minnow_vbus_gpio_table);
+}
+
 static void pch_udc_shutdown(struct pci_dev *pdev)
 {
 	struct pch_udc_dev *dev = pci_get_drvdata(pdev);
@@ -3043,9 +3025,11 @@ static int __maybe_unused pch_udc_resume(struct device *d)
 
 static SIMPLE_DEV_PM_OPS(pch_udc_pm, pch_udc_suspend, pch_udc_resume);
 
-static int pch_udc_probe(struct pci_dev *pdev,
-			  const struct pci_device_id *id)
+typedef int (*platform_init_fn)(struct device *);
+
+static int pch_udc_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 {
+	platform_init_fn platform_init = (platform_init_fn)id->driver_data;
 	int			bar;
 	int			retval;
 	struct pch_udc_dev	*dev;
@@ -3063,6 +3047,13 @@ static int pch_udc_probe(struct pci_dev *pdev,
 	dev->pdev = pdev;
 	pci_set_drvdata(pdev, dev);
 
+	/* Platform specific hook */
+	if (platform_init) {
+		retval = platform_init(&pdev->dev);
+		if (retval)
+			return retval;
+	}
+
 	/* Determine BAR based on PCI ID */
 	if (id->device == PCI_DEVICE_ID_INTEL_QUARK_X1000_UDC)
 		bar = PCH_UDC_PCI_BAR_QUARK_X1000;
@@ -3119,10 +3110,16 @@ static int pch_udc_probe(struct pci_dev *pdev,
 
 static const struct pci_device_id pch_udc_pcidev_id[] = {
 	{
-		PCI_DEVICE(PCI_VENDOR_ID_INTEL,
-			   PCI_DEVICE_ID_INTEL_QUARK_X1000_UDC),
+		PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_QUARK_X1000_UDC),
+		.class = PCI_CLASS_SERIAL_USB_DEVICE,
+		.class_mask = 0xffffffff,
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EG20T_UDC,
+			       PCI_VENDOR_ID_CIRCUITCO, PCI_SUBSYSTEM_ID_CIRCUITCO_MINNOWBOARD),
 		.class = PCI_CLASS_SERIAL_USB_DEVICE,
 		.class_mask = 0xffffffff,
+		.driver_data = (kernel_ulong_t)&pch_udc_minnow_platform_init,
 	},
 	{
 		PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EG20T_UDC),