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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAMRc=MfGWkg1qA63N2gqagVyYrVCX9OqXYRZk_Q97+H2KaoKsQ@mail.gmail.com>
Date: Tue, 13 Jan 2026 08:56:14 -0500
From: Bartosz Golaszewski <brgl@...nel.org>
To: manivannan.sadhasivam@....qualcomm.com
Cc: Rob Herring <robh@...nel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	Jiri Slaby <jirislaby@...nel.org>, Nathan Chancellor <nathan@...nel.org>, 
	Nicolas Schier <nicolas.schier@...ux.dev>, Hans de Goede <hansg@...nel.org>, 
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>, 
	Mark Pearson <mpearson-lenovo@...ebb.ca>, "Derek J. Clark" <derekjohn.clark@...il.com>, 
	Manivannan Sadhasivam <mani@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Marcel Holtmann <marcel@...tmann.org>, Luiz Augusto von Dentz <luiz.dentz@...il.com>, 
	Bartosz Golaszewski <brgl@...ev.pl>, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, 
	Bartosz Golaszewski <brgl@...nel.org>, 
	Manivannan Sadhasivam via B4 Relay <devnull+manivannan.sadhasivam.oss.qualcomm.com@...nel.org>, 
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-kbuild@...r.kernel.org, platform-driver-x86@...r.kernel.org, 
	linux-pci@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-arm-msm@...r.kernel.org, linux-bluetooth@...r.kernel.org, 
	linux-pm@...r.kernel.org, Stephan Gerhold <stephan.gerhold@...aro.org>, 
	Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>, linux-acpi@...r.kernel.org
Subject: Re: [PATCH v4 7/9] Bluetooth: hci_qca: Add M.2 Bluetooth device
 support using pwrseq

On Mon, 12 Jan 2026 17:26:06 +0100, Manivannan Sadhasivam via B4 Relay
<devnull+manivannan.sadhasivam.oss.qualcomm.com@...nel.org> said:
> From: Manivannan Sadhasivam <manivannan.sadhasivam@....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@....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@....qualcomm.com>