linux-kernel - RE: NVMEM usage consult for device information

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Message-ID: <57c79cb8f45449d3ba49609cdd4a0767@mtkmbs01n1.mediatek.inc>
Date:   Tue, 18 Feb 2020 09:26:24 +0000
From:   Mac Lu (盧孟德) <mac.lu@...iatek.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>
CC:     Andrew-CT Chen (陳智迪) 
        <Andrew-CT.Chen@...iatek.com>
Subject: RE: NVMEM usage consult for device information

Hi Srini:
>Is this data stored in a non volatile memory on the SoC?
>if yes, then we should have a proper nvmem provider driver.

Yes. This data is stored in non volatile memory on the SoC.
It would be read at bootloader and delivered to kernel by DTB.


Thanks
Mac

-----Original Message-----
From: Srinivas Kandagatla [mailto:srinivas.kandagatla@...aro.org] 
Sent: Tuesday, February 18, 2020 5:19 PM
To: Mac Lu (盧孟德) <mac.lu@...iatek.com>; linux-kernel@...r.kernel.org; linux-mediatek@...ts.infradead.org
Cc: Andrew-CT Chen (陳智迪) <Andrew-CT.Chen@...iatek.com>
Subject: Re: NVMEM usage consult for device information



On 18/02/2020 05:16, Mac Lu (盧孟德) wrote:
> Hello,
> 
> Mediatek chip have some SOC configurations and specific data which 
> would be delivered to kernel by DTB.
> 
Is this data stored in a non volatile memory on the SoC?
if yes, then we should have a proper nvmem provider driver.

--srini

> So we want to implement a new NVMEM driver to retrieve these data for 
> use by the NVMEM Framework.
> 
> Do you agree with the usage for our application?
> 
> Thanks
> 
> Mac
> 
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