[PATCH v6 24/27] misc: lan966x_pci: Introduce board specific data

[Herve Codina <herve.codina@bootlin.com>]

Only one device-tree overlay (lan966x_evb_lan9662_nic.dtbo) is handled
and this overlay is directly referenced in lan966x_pci_load_overlay().

This avoid to use the code for an other board.

In order to be more generic and to allow support for other boards (PCI
Vendor/Device IDs), introduce the lan966x_pci_info structure and attach
it to PCI Vendor/Device IDs handled by the driver.

This structure contains information related to the PCI board such as
information related to the dtbo describing the board we have to load.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
---
 drivers/misc/lan966x_pci.c | 30 ++++++++++++++++++++++--------
 1 file changed, 22 insertions(+), 8 deletions(-)

diff --git a/drivers/misc/lan966x_pci.c b/drivers/misc/lan966x_pci.c
index e6d1fce0b116..041e92f924c4 100644
--- a/drivers/misc/lan966x_pci.c
+++ b/drivers/misc/lan966x_pci.c
@@ -18,10 +18,6 @@
 #include <linux/pci_ids.h>
 #include <linux/slab.h>
 
-/* Embedded dtbo symbols created by cmd_wrap_S_dtb in scripts/Makefile.lib */
-extern char __dtbo_lan966x_evb_lan9662_nic_begin[];
-extern char __dtbo_lan966x_evb_lan9662_nic_end[];
-
 struct pci_dev_intr_ctrl {
 	struct pci_dev *pci_dev;
 	struct irq_domain *irq_domain;
@@ -118,17 +114,23 @@ static int devm_pci_dev_create_intr_ctrl(struct pci_dev *pdev)
 	return devm_add_action_or_reset(&pdev->dev, devm_pci_dev_remove_intr_ctrl, intr_ctrl);
 }
 
+struct lan966x_pci_info {
+	void *dtbo_begin;
+	void *dtbo_end;
+};
+
 struct lan966x_pci {
 	struct device *dev;
 	int ovcs_id;
+	const struct lan966x_pci_info *info;
 };
 
 static int lan966x_pci_load_overlay(struct lan966x_pci *data)
 {
-	u32 dtbo_size = __dtbo_lan966x_evb_lan9662_nic_end - __dtbo_lan966x_evb_lan9662_nic_begin;
-	void *dtbo_start = __dtbo_lan966x_evb_lan9662_nic_begin;
+	const struct lan966x_pci_info *info = data->info;
 
-	return of_overlay_fdt_apply(dtbo_start, dtbo_size, &data->ovcs_id, dev_of_node(data->dev));
+	return of_overlay_fdt_apply(info->dtbo_begin, info->dtbo_end - info->dtbo_begin,
+				    &data->ovcs_id, dev_of_node(data->dev));
 }
 
 static void lan966x_pci_unload_overlay(struct lan966x_pci *data)
@@ -169,6 +171,9 @@ static int lan966x_pci_probe(struct pci_dev *pdev, const struct pci_device_id *i
 
 	pci_set_drvdata(pdev, data);
 	data->dev = dev;
+	data->info = (const struct lan966x_pci_info *)id->driver_data;
+	if (!data->info)
+		return -EINVAL;
 
 	ret = lan966x_pci_load_overlay(data);
 	if (ret)
@@ -196,8 +201,17 @@ static void lan966x_pci_remove(struct pci_dev *pdev)
 	lan966x_pci_unload_overlay(data);
 }
 
+/* Embedded dtbo symbols created by cmd_wrap_S_dtb in scripts/Makefile.lib */
+extern char __dtbo_lan966x_evb_lan9662_nic_begin[];
+extern char __dtbo_lan966x_evb_lan9662_nic_end[];
+
+static struct lan966x_pci_info evb_lan9662_nic_info = {
+	.dtbo_begin = __dtbo_lan966x_evb_lan9662_nic_begin,
+	.dtbo_end = __dtbo_lan966x_evb_lan9662_nic_end,
+};
+
 static struct pci_device_id lan966x_pci_ids[] = {
-	{ PCI_DEVICE(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_LAN9662) },
+	{ PCI_DEVICE_DATA(EFAR, LAN9662, &evb_lan9662_nic_info) },
 	{ }
 };
 MODULE_DEVICE_TABLE(pci, lan966x_pci_ids);
-- 
2.53.0