linux-kernel - Re: [PATCH v4 2/2] dt-bindings: net: bluetooth: Add device tree bindings for QTI chip WCN3998

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Date:   Tue, 26 Mar 2019 15:34:37 +0530
From:   c-hbandi@...eaurora.org
To:     Matthias Kaehlcke <mka@...omium.org>
Cc:     marcel@...tmann.org, johan.hedberg@...il.com,
        linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        hemantg@...eaurora.org, linux-arm-msm@...r.kernel.org,
        bgodavar@...eaurora.org, anubhavg@...eaurora.org,
        devicetree@...r.kernel.org, mark.rutland@....com,
        robh+dt@...nel.org, linux-bluetooth-owner@...r.kernel.org
Subject: Re: [PATCH v4 2/2] dt-bindings: net: bluetooth: Add device tree
 bindings for QTI chip WCN3998

Hi Matthias,

On 2019-03-25 21:59, Matthias Kaehlcke wrote:
> On Mon, Mar 25, 2019 at 05:06:40PM +0530, Harish Bandi wrote:
>> This patch enables regulators for the Qualcomm Bluetooth WCN3998
>> controller.
>> 
>> Signed-off-by: Harish Bandi <c-hbandi@...eaurora.org>
>> ---
>> Changes in V4:
>> - Removed new compatible WCN3998
>> - changed wcn3990 to wcn399* to represent wcn399* family
>> ---
>>  Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt | 7 
>> ++++---
>>  1 file changed, 4 insertions(+), 3 deletions(-)
>> 
>> diff --git 
>> a/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt 
>> b/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt
>> index 824c0e2..de9cefa 100644
>> --- a/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt
>> +++ b/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt
>> @@ -11,20 +11,21 @@ Required properties:
>>   - compatible: should contain one of the following:
>>     * "qcom,qca6174-bt"
>>     * "qcom,wcn3990-bt"
>> +   * "qcom,wcn3998-bt"
>> 
>>  Optional properties for compatible string qcom,qca6174-bt:
>> 
>>   - enable-gpios: gpio specifier used to enable chip
>>   - clocks: clock provided to the controller (SUSCLK_32KHZ)
>> 
>> -Required properties for compatible string qcom,wcn3990-bt:
>> +Required properties for compatible string qcom,wcn399*-bt:
> 
> I think in Linux drivers the use of 'x' is more common as a wildcard
> for a single letter than an asterisk. It is also in line with the
> function name in the driver, so I would suggest to keep thinkgs
> consistent and call it wcn399x everywhere.

[Harish] - ok, will change it to wcn399x
> 
>> 
>>   - vddio-supply: VDD_IO supply regulator handle.
>>   - vddxo-supply: VDD_XO supply regulator handle.
>>   - vddrf-supply: VDD_RF supply regulator handle.
>>   - vddch0-supply: VDD_CH0 supply regulator handle.
>> 
>> -Optional properties for compatible string qcom,wcn3990-bt:
>> +Optional properties for compatible string qcom,wcn399*-bt:
>> 
>>   - max-speed: see 
>> Documentation/devicetree/bindings/serial/slave-device.txt
>> 
>> @@ -44,7 +45,7 @@ serial@...0000 {
>> 
>>  serial@...000 {
>>  	bluetooth {
>> -		compatible = "qcom,wcn3990-bt";
>> +		compatible = "qcom,wcn399*-bt";
> 
> Typically wildcards aren't used in DT examples as Marcel already
> mentioned on v3. IMO the wildcard degrades the value of the example,
> rather than enhancing it. I think just listing the compatible string
> is enough, no need for an wcn3998/x specific example since it's
> essentialy the same as wcn3990.
[Harish] - So will keep as wcn3990 only here.
> 
> Thanks
> 
> Matthias