On Tue, Sep 5, 2017 at 1:58 PM, Loic Poulain <loic.poulain@xxxxxxxxxx> wrote:
> 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
> v5: remove 2/3 merged in bluetooth-next tree
> Add bluetooth.txt for common BT bindings
> expect local-bd-address in little-endian format
>
> drivers/bluetooth/btqcomsmd.c | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/drivers/bluetooth/btqcomsmd.c b/drivers/bluetooth/btqcomsmd.c
> index bd810d0..c6d3fd9 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>
>
> @@ -135,6 +137,7 @@ static int btqcomsmd_setup(struct hci_dev *hdev)
>
> static int btqcomsmd_probe(struct platform_device *pdev)
> {
> + const bdaddr_t *bdaddr;
> struct btqcomsmd *btq;
> struct hci_dev *hdev;
> void *wcnss;
> @@ -156,6 +159,15 @@ static int btqcomsmd_probe(struct platform_device *pdev)
> if (IS_ERR(btq->cmd_channel))
> return PTR_ERR(btq->cmd_channel);
>
> + /* The local-bd-address DT property is usually injected by the
> + * bootloader which has access to the allocated BD address.
> + */
> + bdaddr = of_get_property(pdev->dev.of_node, "local-bd-address", &ret);
> + if (bdaddr && ret == sizeof(bdaddr_t)) {
> + BT_INFO("BD address %pMR retrieved from device-tree", bdaddr);
> + bacpy(&btq->bdaddr, bdaddr);
> + }
Can we put all this into a helper function before we get more
instances. And use the u8 array property function. We're trying to
make of_get_property an internal function.
Rob
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