linux-kernel - Re: [PATCH 0/3] nvmem: add ONIE NVMEM cells provider

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Date:   Tue, 22 Sep 2020 13:04:17 +0300
From:   Vadym Kochan <vadym.kochan@...ision.eu>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     Rob Herring <robh+dt@...nel.org>, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH 0/3] nvmem: add ONIE NVMEM cells provider

Hi Srinivas,

On Tue, Sep 22, 2020 at 10:48:23AM +0100, Srinivas Kandagatla wrote:
> 
> 
> On 22/09/2020 00:56, Vadym Kochan wrote:
> > Hi Srinivas,
> > 
> > On Tue, Sep 15, 2020 at 03:41:13PM +0300, Vadym Kochan wrote:
> > > This series adds cells parser for the ONIE TLV attributes which are
> > > stored on NVMEM device. It adds possibility to read the mac address (and
> > > other info) by other drivers.
> > > 
> > > Because ONIE stores info in TLV format it should be parsed first and
> > > then register the cells. Current NVMEM API allows to register cell
> > > table with known cell's offset which is not guaranteed in case of TLV.
> > > 
> > > To make it properly handled the NVMEM parser object is introduced. The
> > > parser needs to be registered before target NVMEM device is registered.
> > > During the registration of NVMEM device the parser is called to parse
> > > the device's cells and reister the cell table.
> > > 
> > > Vadym Kochan (3):
> > >    nvmem: core: introduce cells parser
> > >    nvmem: add ONIE nvmem cells parser
> > >    dt-bindings: nvmem: add description for ONIE cells parser
> > > 
> > >   .../bindings/nvmem/onie,nvmem-cells.txt       |  11 +
> > >   drivers/nvmem/Kconfig                         |   9 +
> > >   drivers/nvmem/Makefile                        |   3 +
> > >   drivers/nvmem/core.c                          |  80 ++++
> > >   drivers/nvmem/onie-cells.c                    | 370 ++++++++++++++++++
> > >   include/linux/nvmem-provider.h                |  30 ++
> > >   6 files changed, 503 insertions(+)
> > >   create mode 100644 Documentation/devicetree/bindings/nvmem/onie,nvmem-cells.txt
> > >   create mode 100644 drivers/nvmem/onie-cells.c
> > > 
> > > -- 
> > > 2.17.1
> > > 
> 
> Hi Vdaym,
> 
> Am totally confused with this patchset, There is no versioning in any of
> your patches, you always send it with PATCH, please add version so that I
> know which one should I review!
> 
> This makes my mailbox totally confused with all the patches with same
> subject prefix!
> 
> Please note that maintenance is not my full time job, so please be patient
> and I can try shift gears as an when possible!

Thank you!

> 
> > 
> > I sent a newer version than this one which actually registers nvmem provider
> > and does not require changes in the core.c
> This is a NO-NO as onie is not a real provider here, at24 is the actual
> nvmem provider in your case.
> 
> Why do you keep changing the total approach here! what is the reasoning to
> do so!

Well, I though that maybe anyway it also better to show the code, and
try different approaches.

> As I said in my last review we were okay with this parser approach!
> 
> I don't mind having changes in core as long as it done properly!
> 
> 
> thanks,
> srini

I am really sorry for this! I was really conceptually confused about how
to make it right by design. I will use "parser" word in next series
subject update with a versioning (v2) so you can identify that this is
related to parser approach with which you are conceptually fine.

Again sorry for this!

> 
> 
> 
> 
> > 
> > Thanks,
> > Vadym Kochan
> >