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From: Rocky Liao <rjliao@codeaurora.org>
To: Marc Gonzalez <marc.w.gonzalez@free.fr>
Cc: marcel@holtmann.org, johan.hedberg@gmail.com,
	Matthias Kaehlcke <mka@chromium.org>,
	LKML <linux-kernel@vger.kernel.org>,
	linux-bluetooth@vger.kernel.org,
	MSM <linux-arm-msm@vger.kernel.org>,
	bgodavar@codeaurora.org, Rob Herring <robh+dt@kernel.org>
Subject: Re: [PATCH v2 2/2] dt-bindings: net: bluetooth: Add device property nvm-postfix for QCA6174
Date: Tue, 09 Apr 2019 18:15:25 +0800
Message-ID: <319cbb5f23ed3d9f1ae77c697001378d@codeaurora.org> (raw)
In-Reply-To: <535c74d4-00b1-eef2-578a-8807f4b9f640@free.fr>

On 2019-04-04 20:32, Marc Gonzalez wrote:
> +robh
> 
> On 04/04/2019 11:08, Rocky Liao wrote:
> 
>> This patchs patch adds an optional device property nvm-postfix to 
>> allow the
>> driver to load customized nvm file based on this property
> 
> While text /before/ is indeed called a "prefix", text /after/ is not a
> "postfix",
> but a "suffix".
> 
> 
>>  Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt | 2 ++
>>  1 file changed, 2 insertions(+)
>> 
>> diff --git 
>> a/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt 
>> b/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt
>> index 824c0e2..70cda4b 100644
>> --- a/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt
>> +++ b/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt
>> @@ -16,6 +16,7 @@ Optional properties for compatible string 
>> qcom,qca6174-bt:
>> 
>>   - enable-gpios: gpio specifier used to enable chip
>>   - clocks: clock provided to the controller (SUSCLK_32KHZ)
>> + - nvm-postfix: nvm file postfix to load customized nvm file
> 
> The device tree is supposed to describe hardware.
> 
> The name of which file to load can hardly be considered part of the HW.
> 
> Possible solutions:
> 1) derive the file name from the compatible string
> 2) pass the name as a module parameter
> 3) something else
> 
> 
>> @@ -39,6 +40,7 @@ serial@7570000 {
>> 
>>  		enable-gpios = <&pm8994_gpios 19 GPIO_ACTIVE_HIGH>;
>>  		clocks = <&divclk4>;
>> +		nvm-postfix = "i2s";
>>  	};
>>  };
> 
> If one provides the entire suffix, including the underscore, then you 
> can
> simplify the code:
> 
> 	snprintf(config.fwname, sizeof(config.fwname), "qca/nvm_%08x%s.bin",
> soc_ver, suffix ? suffix : "");
> 
> Regards
.
Hi Marc,

The major purpose for that property is about the BT audio bus type, can 
it be considered as part of the HW? If yes maybe we can use a property 
name "audio-bus" to reflect that.

If not then I will adopt the solution 1 to add a new compatible string 
"{ .compatible = "qcom,qca6174-bt-i2s" }" and load specific nvm for this 
compatible string, please feel free to let me know if any other 
concerns.

-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora 
Forum,
a Linux Foundation Collaborative Project

  reply index

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-04  6:37 [PATCH] Bluetooth: hci_qca: Load customized NVM based on the device property Rocky Liao
2019-04-04  6:56 ` Balakrishna Godavarthi
2019-04-04  9:08 ` [PATCH v2 1/2] " Rocky Liao
2019-04-04  9:08   ` [PATCH v2 2/2] dt-bindings: net: bluetooth: Add device property nvm-postfix for QCA6174 Rocky Liao
2019-04-04 12:32     ` Marc Gonzalez
2019-04-09 10:15       ` Rocky Liao [this message]
2019-04-09 14:03         ` Rob Herring
2019-04-09 14:48           ` Rocky Liao
2019-04-09 13:54       ` Rob Herring
2019-04-10  9:27     ` [PATCH v3 2/2] dt-bindings: net: bluetooth: Add device property firmware-name " Rocky Liao
2019-04-23 17:06       ` Marcel Holtmann
2019-04-24  6:19         ` Rocky Liao
2019-04-26 17:45           ` Rob Herring
2019-04-27  5:59             ` Marcel Holtmann
2019-05-03  7:56               ` Rocky Liao
2019-05-05 17:32                 ` Marcel Holtmann
2019-04-26 20:50       ` Rob Herring
2019-05-12  3:19       ` [PATCH v4 " Rocky Liao
2019-05-13 15:31         ` Rob Herring
2019-05-15 11:20         ` [PATCH v5 " Rocky Liao
2019-06-06  9:40           ` [PATCH v6 " Rocky Liao
2019-06-11 22:01             ` Rob Herring
2019-07-06 10:56             ` Marcel Holtmann
2019-04-04  9:59   ` [PATCH v2 1/2] Bluetooth: hci_qca: Load customized NVM based on the device property Balakrishna Godavarthi
2019-04-10  9:27   ` [PATCH v3 " Rocky Liao
2019-05-12  3:19     ` [PATCH v4 " Rocky Liao
2019-05-15  5:32       ` Balakrishna Godavarthi
2019-05-15  8:30         ` Rocky Liao
2019-05-15 11:19       ` [PATCH v5 " Rocky Liao
2019-05-17  2:43         ` Balakrishna Godavarthi
2019-05-17  4:26           ` Harish Bandi
2019-06-06  9:40         ` [PATCH v6 " Rocky Liao
2019-06-06 12:02           ` Harish Bandi
2019-07-06 10:51           ` Marcel Holtmann

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