Retrieve BD address from the DT 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 <loic.poulain@xxxxxxxxxx>
---
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
drivers/bluetooth/btqcomsmd.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/bluetooth/btqcomsmd.c b/drivers/bluetooth/btqcomsmd.c
index c70fae75c4ad..08a83cb30af6 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>
@@ -126,6 +128,7 @@ static int btqcomsmd_setup(struct hci_dev *hdev)
static int btqcomsmd_probe(struct platform_device *pdev)
{
+ const bdaddr_t *local_bd_addr;
struct btqcomsmd *btq;
struct hci_dev *hdev;
void *wcnss;
@@ -147,6 +150,18 @@ static int btqcomsmd_probe(struct platform_device *pdev)
if (IS_ERR(btq->cmd_channel))
return PTR_ERR(btq->cmd_channel);
+ /* The local-bd-address DT property is usually injected by the
+ * bootloader which has access to the allocated BD address.
+ */
+ local_bd_addr = of_get_property(pdev->dev.of_node, "local-mac-address",
+ &ret);
+ if (local_bd_addr && ret == sizeof(bdaddr_t)) {
+ /* local-bd-address stored with most significant byte first */
+ baswap(&btq->bdaddr, local_bd_addr);
+ BT_INFO("BD address %pMR retrieved from device-tree",
+ &btq->bdaddr);
+ }
+
hdev = hci_alloc_dev();
if (!hdev)
return -ENOMEM;
--
2.13.0
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