linux-kernel - Re: [PATCH v2] Bluetooth: qca: set power_ctrl_enabled on NULL returned by gpiod_get

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Message-ID: <cfc263aa-110e-4b63-b54b-976d07724369@linaro.org>
Date: Wed, 24 Apr 2024 17:31:58 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: quic_zijuhu <quic_zijuhu@...cinc.com>,
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Cc: Bartosz Golaszewski <brgl@...ev.pl>, Marcel Holtmann
 <marcel@...tmann.org>, Luiz Augusto von Dentz <luiz.dentz@...il.com>,
 linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
 Wren Turkal <wt@...guintechs.org>
Subject: Re: [PATCH v2] Bluetooth: qca: set power_ctrl_enabled on NULL
 returned by gpiod_get_optional()

On 24/04/2024 17:24, quic_zijuhu wrote:
> On 4/24/2024 10:52 PM, Bartosz Golaszewski wrote:
>> On Wed, 24 Apr 2024 at 16:46, Krzysztof Kozlowski
>> <krzysztof.kozlowski@...aro.org> wrote:
>>>
>>> On 24/04/2024 14:29, Bartosz Golaszewski wrote:
>>>> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
>>>>
>>>
>>>>               qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL);
>>>>               if (IS_ERR(qcadev->susclk)) {
>>>> @@ -2355,10 +2360,13 @@ static int qca_serdev_probe(struct serdev_device *serdev)
>>>>               qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
>>>>                                              GPIOD_OUT_LOW);
>>>>               if (IS_ERR(qcadev->bt_en)) {
>>>> -                     dev_warn(&serdev->dev, "failed to acquire enable gpio\n");
>>>> -                     power_ctrl_enabled = false;
>>>> +                     dev_err(&serdev->dev, "failed to acquire enable gpio\n");
>>>> +                     return PTR_ERR(qcadev->bt_en);
> please think about for QCA2066. if it is returned from here.  BT will

Which is correct. QCA2066 requires GPIO. Look at the bindings.

> not working at all.  if you don't return here. i will be working fine
> for every BT functionality.
> NAK again by me.

Yeah, my bad, I taught you that sentence and you keep repeating it.

Best regards,
Krzysztof