From: Boris Brezillon <bbrezillon@kernel.org>
To: Marek Vasut <marek.vasut@gmail.com>
Cc: masonccyang@mxic.com.tw, broonie@kernel.org,
Geert Uytterhoeven <geert+renesas@glider.be>,
Simon Horman <horms@verge.net.au>,
juliensu@mxic.com.tw, linux-kernel@vger.kernel.org,
linux-renesas-soc@vger.kernel.org, linux-spi@vger.kernel.org,
sergei.shtylyov@cogentembedded.com, zhengxunli@mxic.com.tw
Subject: Re: [PATCH v7 1/2] spi: Add Renesas R-Car Gen3 RPC-IF SPI controller driver
Date: Wed, 30 Jan 2019 10:26:46 +0100 [thread overview]
Message-ID: <20190130102646.23c798fc@bbrezillon> (raw)
In-Reply-To: <e4351834-5c7d-b751-b3c7-97dce5207783@gmail.com>
On Wed, 30 Jan 2019 08:15:25 +0100
Marek Vasut <marek.vasut@gmail.com> wrote:
> >> > So far as I know that HF is provided by Cypress only and
> >> > any mass production product use the component which is provided by only
> >> > one provider
> >> > will be a big risk.
> >> >
> >> > Compare to HF, there are more provider of SPI/Octa could support the
> >> > mass production product
> >> > as their second provider.
> >> >
> >> > In addition, from the technical points of view, mx25uw51245g is more
> >> > powerful than HF and
> >> > good for complicate user application, i.e., OTA and so on.
> >>
> >> Did you consider protocol overhead too ? I don't think you can compare
> >> them just by raw numbers of pins and bus frequency.
> >>
> >> Note that over-the-air update (if that's what you mean by OTA) is
> >> completely separate from the underlying storage device.
> >
> > It's key feature of mx25uw51245g supports Read-while-Write capability
> > that allows read access from one memory bank while writing to another
> > memory bank.
>
> Note that this sales pitch is rather off-topic.
>
Fully agree with Marek on that point. The discussion is about
supporting both HF and SPI-MEM modes (or, at least have a plan to
support HF at some point) not figuring out which option is better.
next prev parent reply other threads:[~2019-01-30 9:26 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-23 7:09 [PATCH v7 0/2] spi: Add Renesas R-Car Gen3 RPC-IF SPI driver Mason Yang
2019-01-23 7:09 ` [PATCH v7 1/2] spi: Add Renesas R-Car Gen3 RPC-IF SPI controller driver Mason Yang
2019-01-23 18:04 ` Sergei Shtylyov
[not found] ` <OFC86383C3.5347178A-ON4825838C.00093E95-4825838C.000B9D6F@mxic.com.tw>
2019-01-24 9:12 ` Geert Uytterhoeven
2019-01-24 11:27 ` Sergei Shtylyov
2019-01-24 11:27 ` Sergei Shtylyov
2019-01-24 1:51 ` Marek Vasut
[not found] ` <OF767ACC95.EECC73BE-ON4825838C.000BD6A3-4825838C.000D23A6@mxic.com.tw>
2019-01-24 3:13 ` Marek Vasut
[not found] ` <OF891E176A.614DBEEF-ON4825838C.0022D454-4825838C.002396ED@mxic.com.tw>
2019-01-26 9:41 ` Marek Vasut
[not found] ` <OFEAAE10B4.20C3E45D-ON48258390.0007CD37-48258390.0009066E@mxic.com.tw>
2019-01-28 11:03 ` Marek Vasut
[not found] ` <OF1DC7FF88.3574E5B9-ON48258391.000A5001-48258391.000D5DDE@mxic.com.tw>
2019-01-29 4:43 ` Marek Vasut
[not found] ` <OFA6EF1EB2.198B44D0-ON48258392.00099520-48258392.000D03A4@mxic.com.tw>
2019-01-30 7:15 ` Marek Vasut
2019-01-30 9:26 ` Boris Brezillon [this message]
2019-01-24 11:31 ` Sergei Shtylyov
2019-01-23 7:09 ` [PATCH v7 2/2] dt-bindings: spi: Document Renesas R-Car Gen3 RPC-IF controller bindings Mason Yang
2019-01-23 18:06 ` Sergei Shtylyov
[not found] ` <OF87800430.BAF731CA-ON4825838C.0006CCEE-4825838C.00092BDE@mxic.com.tw>
2019-01-24 8:16 ` Sergei Shtylyov
2019-01-24 1:53 ` Marek Vasut
[not found] ` <OFB904EE00.27B08F2C-ON4825838C.000D6846-4825838C.000E90F7@mxic.com.tw>
2019-01-24 9:06 ` Geert Uytterhoeven
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