[PATCH v1] drm/xe/i2c: Allow per domain unique id

[Raag Jadav <raag.jadav@intel.com>]

PCI bus, device and function can be same for devices existing across
different domains. Allow per domain unique identifier while registering
platform device to prevent name conflict.

Fixes: f0e53aadd702 ("drm/xe: Support for I2C attached MCUs")
Signed-off-by: Raag Jadav <raag.jadav@intel.com>
---
 drivers/gpu/drm/xe/xe_i2c.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_i2c.c b/drivers/gpu/drm/xe/xe_i2c.c
index bd956776b10b..a26c38bb17a1 100644
--- a/drivers/gpu/drm/xe/xe_i2c.c
+++ b/drivers/gpu/drm/xe/xe_i2c.c
@@ -95,18 +95,21 @@ static int xe_i2c_register_adapter(struct xe_i2c *i2c)
 	struct platform_device *pdev;
 	struct fwnode_handle *fwnode;
 	int ret;
+	u32 id;
 
 	fwnode = fwnode_create_software_node(xe_i2c_adapter_properties, NULL);
 	if (IS_ERR(fwnode))
 		return PTR_ERR(fwnode);
 
+	id = (pci_domain_nr(pci->bus) << 16) | pci_dev_id(pci);
+
 	/*
 	 * Not using platform_device_register_full() here because we don't have
 	 * a handle to the platform_device before it returns. xe_i2c_notifier()
 	 * uses that handle, but it may be called before
 	 * platform_device_register_full() is done.
 	 */
-	pdev = platform_device_alloc(adapter_name, pci_dev_id(pci));
+	pdev = platform_device_alloc(adapter_name, id);
 	if (!pdev) {
 		ret = -ENOMEM;
 		goto err_fwnode_remove;
-- 
2.43.0