Re: [PATCH v4 7/9] Bluetooth: hci_qca: Add M.2 Bluetooth device support using pwrseq

Bartosz Golaszewski
2026-01-13T13:56:16Z

On Mon, 12 Jan 2026 17:26:06 +0100, Manivannan Sadhasivam via B4 Relay
<devnull+manivannan.sadhasivam.oss.qualcomm.com@kernel.org> said:
> From: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
>
> Power supply to the M.2 Bluetooth device attached to the host using M.2
> connector is controlled using the 'uart' pwrseq device. So add support for
> getting the pwrseq device if the OF graph link is present. Once obtained,
> the existing pwrseq APIs can be used to control the power supplies of the
> M.2 card.
>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
> ---
> drivers/bluetooth/hci_qca.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
> index 888176b0faa9..4d562596ebf9 100644
> --- a/drivers/bluetooth/hci_qca.c
> +++ b/drivers/bluetooth/hci_qca.c
> @@ -26,6 +26,7 @@
> #include <linux/mod_devicetable.h>
> #include <linux/module.h>
> #include <linux/of.h>
> +#include <linux/of_graph.h>
> #include <linux/acpi.h>
> #include <linux/platform_device.h>
> #include <linux/pwrseq/consumer.h>
> @@ -2384,6 +2385,14 @@ static int qca_serdev_probe(struct serdev_device *serdev)
> case QCA_WCN6855:
> case QCA_WCN7850:
> case QCA_WCN6750:
> + if (of_graph_is_present(dev_of_node(&serdev->ctrl->dev))) {
> + qcadev->bt_power->pwrseq = devm_pwrseq_get(&serdev->ctrl->dev,
> + "uart");
> + if (IS_ERR(qcadev->bt_power->pwrseq))
> + return PTR_ERR(qcadev->bt_power->pwrseq);
> + break;
> + }
> +
> if (!device_property_present(&serdev->dev, "enable-gpios")) {
> /*
> * Backward compatibility with old DT sources. If the
>
> --
> 2.48.1
>
>
>

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>