netdev - Re: [PATCH 3/8] dt-bindings: net: bluetooth: Add rtl8723bs-bluetooth

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Message-ID: <8b97f349-4416-058c-0d01-3be592b89a7d@davidjohnsummers.uk>
Date:   Fri, 22 Feb 2019 19:14:56 +0000
From:   David Summers <beagleboard@...idjohnsummers.uk>
To:     Vasily Khoruzhick <anarsoul@...il.com>,
        Stefan Wahren <stefan.wahren@...e.com>
Cc:     Rob Herring <robh@...nel.org>, Mark Rutland <mark.rutland@....com>,
        devicetree <devicetree@...r.kernel.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        netdev@...r.kernel.org, Marcel Holtmann <marcel@...tmann.org>,
        linux-bluetooth@...r.kernel.org, Chen-Yu Tsai <wens@...e.org>,
        "David S. Miller" <davem@...emloft.net>,
        arm-linux <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 3/8] dt-bindings: net: bluetooth: Add rtl8723bs-bluetooth

Hi Vasily,

Just catching up with this series - good that you are doing it. We need 
it for users on ArchLinux ARM!

On question though, what is "firmware-postfix" used for? I see in the 
documentation, that it points to the board name. But can't see where 
else it is used.

Is there a need to have the board name?

Anyway good work.

David.

On 18/02/2019 22:28, Vasily Khoruzhick wrote:
> On Mon, Feb 18, 2019 at 2:08 PM Stefan Wahren <stefan.wahren@...e.com> wrote:
>> Hi Vasily,
> Hi Stefan,
>
>>> Vasily Khoruzhick <anarsoul@...il.com> hat am 18. Februar 2019 um 22:24 geschrieben:
>>>
>>>
>>> On Mon, Feb 18, 2019 at 1:10 PM Rob Herring <robh@...nel.org> wrote:
>>>> On Fri, Jan 18, 2019 at 09:02:27AM -0800, Vasily Khoruzhick wrote:
>>>>> Add binding document for bluetooth part of RTL8723BS/RTL8723CS
>>>>>
>>>>> Signed-off-by: Vasily Khoruzhick <anarsoul@...il.com>
>>>>> ---
>>>>>   .../bindings/net/rtl8723bs-bluetooth.txt      | 35 +++++++++++++++++++
>>>>>   1 file changed, 35 insertions(+)
>>>>>   create mode 100644 Documentation/devicetree/bindings/net/rtl8723bs-bluetooth.txt
>>>>>
>>>>> diff --git a/Documentation/devicetree/bindings/net/rtl8723bs-bluetooth.txt b/Documentation/devicetree/bindings/net/rtl8723bs-bluetooth.txt
>>>>> new file mode 100644
>>>>> index 000000000000..8357f242ae4c
>>>>> --- /dev/null
>>>>> +++ b/Documentation/devicetree/bindings/net/rtl8723bs-bluetooth.txt
>>>>> @@ -0,0 +1,35 @@
>>>>> +RTL8723BS/RTL8723CS Bluetooth
>>>>> +---------------------
>>>>> +
>>>>> +RTL8723CS/RTL8723CS is WiFi + BT chip. WiFi part is connected over SDIO, while
>>>>> +BT is connected over serial. It speaks H5 protocol with few extra commands
>>>>> +to upload firmware and change module speed.
>>>>> +
>>>>> +Required properties:
>>>>> +
>>>>> + - compatible: should be one of the following:
>>>>> +   * "realtek,rtl8723bs-bt"
>>>>> +   * "realtek,rtl8723cs-bt"
>>>>> +Optional properties:
>>>>> +
>>>>> + - device-wake-gpios: GPIO specifier, used to wakeup the BT module (active high)
>>>>> + - enable-gpios: GPIO specifier, used to enable the BT module (active high)
>>>>> + - host-wake-gpios: GPIO specifier, used to wakeup the host processor (active high)
>>>>> + - firmware-postfix: firmware postfix to be used for firmware config
>> sorry, i didn't noticed your great series before. David and i working at the same stuff but for the Asus Tinker Board.
>>
>> I created a similiar yet untested patch version for hci_h5 [1]. Maybe it's useful.
> Looks good to me, but you may need to add firmware-postfix.
>
>> Just a comment about the binding. It's really necessary to add the reset-gpio? Can't we use the enable-gpio with inverse polarity for this?
> Yes, we can use enable-gpio instead of reset-gpio on pine64 and pinebook.
>
>> Stefan