[PATCH v4 3/3] Bluetooth: btqcomsmd: retieve BD address from DT
From: Loic Poulain <hidden>
Date: 2017-09-05 10:26:04
Also in:
linux-arm-msm, linux-devicetree
Subsystem:
arm/qualcomm mailing list, bluetooth drivers, qualcomm bluetooth driver, the rest · Maintainers:
Marcel Holtmann, Luiz Augusto von Dentz, Bartosz Golaszewski, Linus Torvalds
Possibly related (same subject, not in this thread)
- 2017-09-08 · Re: [PATCH v4 3/3] Bluetooth: btqcomsmd: retieve BD address from DT · kbuild test robot <hidden>
- 2017-09-05 · Re: [PATCH v4 3/3] Bluetooth: btqcomsmd: retieve BD address from DT · Marcel Holtmann <hidden>
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 <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
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