Retrieve BD address from the local-bd-address property.
This address must be unique and is usually added in the DT
by the bootloader which has access to the provisioned data.

Signed-off-by: Loic Poulain <redacted>
---
 v2: Set device as unconfigured if default address detected
     Add warning if BD addr retrieved from DT
 v3: if no addr retrieved from DT, unconditionally set
     the invalid BD addr flag.
     swap and set bdaddr in the platform probe
 v4: Add dt-bindings documentation
     split patch in two parts (setup, dt prop)
     use local-bd-address name instead of local-mac-address
 v5: remove 2/3 merged in bluetooth-next tree
     Add bluetooth.txt for common BT bindings
     expect local-bd-address in little-endian format
 v6: use of_property_read_u8_array instead of of_get_property

 drivers/bluetooth/btqcomsmd.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/bluetooth/btqcomsmd.c b/drivers/bluetooth/btqcomsmd.c
index bd810d0..b5716f0 100644
--- a/drivers/bluetooth/btqcomsmd.c
+++ b/drivers/bluetooth/btqcomsmd.c

@@ -15,6 +15,8 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/rpmsg.h>
+#include <linux/of.h>
+
 #include <linux/soc/qcom/wcnss_ctrl.h>
 #include <linux/platform_device.h>
 

@@ -156,6 +158,15 @@ static int btqcomsmd_probe(struct platform_device *pdev)
 	if (IS_ERR(btq->cmd_channel))
 		return PTR_ERR(btq->cmd_channel);
 
+	/* The local-bd-address property is usually injected by the
+	 * bootloader which has access to the allocated BD address.
+	 */
+	if (!of_property_read_u8_array(pdev->dev.of_node, "local-bd-address",
+				       (u8 *)&btq->bdaddr, sizeof(bdaddr_t))) {
+		BT_INFO("BD address %pMR retrieved from device-tree",
+			&btq->bdaddr);
+	}
+
 	hdev = hci_alloc_dev();
 	if (!hdev)
 		return -ENOMEM;

-- 
1.9.1