linux-kernel - Re: [PATCHv2 3/4] dt: bindings: add new dt entry for BTCOEX feature in qcom,ath10k.txt

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Date:   Wed, 23 Nov 2016 15:50:17 +0530
From:   Tamizh chelvam <tamizhchelvam@...eaurora.org>
To:     Rob Herring <robh@...nel.org>
Cc:     c_traja@....qualcomm.com, ath10k@...ts.infradead.org,
        linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCHv2 3/4] dt: bindings: add new dt entry for BTCOEX feature
 in qcom,ath10k.txt

Thanks for the comments.

On 2016-11-18 20:14, Rob Herring wrote:
> On Thu, Nov 17, 2016 at 05:14:23PM +0530, c_traja@....qualcomm.com 
> wrote:
>> From: Tamizh chelvam <tamizhchelvam@...eaurora.org>
>> 
>> There two things done in this patch.
>> 
>> 1) 'btcoex_support' flag for BTCOEX feature support by the hardware.
>> 2) 'wlan_btcoex_gpio' is used to fill wlan priority pin number for
>>    BTCOEX priority feature support.
>> 
>> Signed-off-by: Tamizh chelvam <tamizhchelvam@...eaurora.org>
>> ---
>>  .../bindings/net/wireless/qcom,ath10k.txt          |    4 ++++
>>  1 file changed, 4 insertions(+)
>> 
>> diff --git 
>> a/Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt 
>> b/Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt
>> index 74d7f0a..08150e2d 100644
>> --- a/Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt
>> +++ b/Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt
>> @@ -46,6 +46,10 @@ Optional properties:
>>  				 hw versions.
>>  - qcom,ath10k-pre-calibration-data : pre calibration data as an 
>> array,
>>  				     the length can vary between hw versions.
>> +- btcoex_support  : should contain eithr "0" or "1" to indicate 
>> btcoex
>> +		    support by the hardware.
> 
> This is BT coexistence? Make this boolean and n

Yes, this is BT coexistence. And I didn't get what are you trying to say 
in this "Make this boolean and n"
> 
>> +- btcoex_gpio_pin :  btcoex gpio pin number for the device which
>> +		     supports BTCOEX.
> 
> This is a pin number on the chip, not any pin number Linux GPIO subsys
> cares about, right? Is there a connection to the host too, or this is
> internal between BT and WiFi?

This is internal between BT and wifi.
> 
> Do you really need 2 properties? Does supporting this feature require
> the GPIO? If so, then the first property is redundant.
> 
Target/driver can hard copy this gpio pin for some chipsets and there we 
will need btcoex_support flag to find the btcoex support.

> Needs vendor prefix and don't use '_'. Should be something like
> 'qcom,bt-coexist-gpio-pin'.
> 
Sure I'll update this and send in v3 patch