linux-kernel - Re: [PATCH v1 2/2] spi: cadence-qspi: Add QSPI support for Intel LGM SoC

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Date:   Wed, 18 Sep 2019 13:59:06 +0800
From:   "Ramuthevar, Vadivel MuruganX" 
        <vadivel.muruganx.ramuthevar@...ux.intel.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     robh+dt@...nel.org, mark.rutland@....com,
        linux-spi@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, cheol.yong.kim@...el.com,
        qi-ming.wu@...el.com
Subject: Re: [PATCH v1 2/2] spi: cadence-qspi: Add QSPI support for Intel LGM
 SoC

Hi Mark,

    Thank you for the review comments.

On 17/9/2019 11:36 PM, Mark Brown wrote:
> On Tue, Sep 17, 2019 at 10:11:28AM +0800, Ramuthevar, Vadivel MuruganX wrote:
>
>> *    spi-cadence.c* in *drivers/spi/*, which supports very old legacy
>> cadence-spi based devices(normal)
>> *    cadence-quadspi.c(drivers/mtd/spi-nor/)* : specific support to SPI-NOR
>> flash with new spi-nor layer.
>>      all the API's in this driver purely on spi-nor specific, so couldn't
>> proceed to adapt.
> Are these completely separate IPs or are they just different versions of
> the same IP?

These are same IPs , but different features Enabled/Disabled depends 
upon the SoC vendors.

for e.g: Intel LGM SoC uses the same IP, but without DMA and Direct 
access controller.

also dedicated support to flash devices.

Best regards

Vadivel