linux-kernel - RE: [PATCH net-next v2 2/2] misc: Add Renesas Synchronization Management Unit (SMU) support

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Message-ID: <OSBPR01MB477360E86A8913D07759C1C8BA759@OSBPR01MB4773.jpnprd01.prod.outlook.com>
Date:   Wed, 7 Apr 2021 20:12:10 +0000
From:   Min Li <min.li.xe@...esas.com>
To:     Greg KH <gregkh@...uxfoundation.org>
CC:     "derek.kiernan@...inx.com" <derek.kiernan@...inx.com>,
        "dragan.cvetic@...inx.com" <dragan.cvetic@...inx.com>,
        "arnd@...db.de" <arnd@...db.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH net-next v2 2/2] misc: Add Renesas Synchronization
 Management Unit (SMU) support

> 
> Why not use the miscdev name field?
> 
miscdev name field is just a char pointer and I need an static array to manipulate the name with index

> 
> So it's a parent?  Why not make this a real platform_device pointer and not
> a device pointer?
> 

It is not parent and mfd field is the parent

> 
> What operations?
> 

The MFD driver will create 2 devices, one is for phc driver and another one is this driver.
The lock is to make sure these 2 driver's operations are synchronized. 

> 
> Index into what?
> 

index is passed by mfd driver and will be used as part of device name such as "rsmu0"