linux-kernel - Re: [PATCH v11 2/2] spi: cadence-quadspi: Add support for the Cadence QSPI controller

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Date:   Fri, 28 Feb 2020 12:11:09 +0800
From:   "Ramuthevar, Vadivel MuruganX" 
        <vadivel.muruganx.ramuthevar@...ux.intel.com>
To:     Boris Brezillon <boris.brezillon@...labora.com>
Cc:     linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org,
        broonie@...nel.org, vigneshr@...com, robh+dt@...nel.org,
        marex@...x.de, devicetree@...r.kernel.org,
        tien.fong.chee@...el.com, tudor.ambarus@...il.com,
        boris.brezillon@...e-electrons.com, richard@....at,
        qi-ming.wu@...el.com, simon.k.r.goldschmidt@...il.com,
        david.oberhollenzer@...ma-star.at, dinguyen@...nel.org,
        linux-mtd@...ts.infradead.org, miquel.raynal@...tlin.com,
        cheol.yong.kim@...el.com, mark.rutland@....com,
        computersforpeace@...il.com, dwmw2@...radead.org,
        cyrille.pitchen@...el.com
Subject: Re: [PATCH v11 2/2] spi: cadence-quadspi: Add support for the Cadence
 QSPI controller

Hi Boris,

      Thank you so much for the review comments...

On 28/2/2020 1:30 AM, Boris Brezillon wrote:
> On Thu, 27 Feb 2020 14:27:08 +0800
> "Ramuthevar, Vadivel MuruganX"
> <vadivel.muruganx.ramuthevar@...ux.intel.com> wrote:
>
>> From: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@...ux.intel.com>
>>
>> Add support for the Cadence QSPI controller. This controller is
>> present in the Intel Lightning Mountain(LGM) SoCs, Altera and TI SoCs.
>> This driver has been tested on the Intel LGM SoCs.
>>
>> This driver does not support generic SPI and also the implementation
>> only supports spi-mem interface to replace the existing driver in
>> mtd/spi-nor/cadence-quadspi.c, the existing driver only support SPI-NOR
>> flash memory
> Is it really supporting SPI NORs only, or is it just that you only
> tested it with a spi-nor?

The existing drivers/mtd/spi-nor/cadence-quadspi.c supports SPI-NORs 
only, because the driver is developed

such a way that it does not support other SPI based flash memories, also 
never uses SPI/SPI-MEM based framework.

So we Vignesh suggested me to  develop the new driver which supports 
both SPI-NOR and SPI-NAND based on the SPI-MEM framework.

>> Signed-off-by: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@...ux.intel.com>
>> Signed-off-by: Vignesh Raghavendra <vigneshr@...com>
>> Reported-by: kbuild test robot <lkp@...el.com>
>> Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
> Reported-by? What has been reported?
Sure, will remove it.
>
>> ---
>>   drivers/mtd/spi-nor/Kconfig                        |  11 -
>>   drivers/mtd/spi-nor/Makefile                       |   1 -
>>   drivers/spi/Kconfig                                |  10 +
>>   drivers/spi/Makefile                               |   1 +
>>   .../spi-cadence-quadspi.c}                         | 641 ++++++++++-----------
> Looks like this could be split in several patches to ease the review:
>
> 1/ convert to spi-mem
> 2/ move the driver to drivers/spi
> 3/ add support for intel,lgm-qspi
>
> other than that, that's good to see one more spi-nor controller driver
> converted to spi-mem.

Agreed!, will split as per your suggestions.

Regards
Vadivel
>