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);
+	}