From: "R, Vignesh" <vigneshr@ti.com>
To: Mark Brown <broonie@kernel.org>
Cc: Tony Lindgren <tony@atomide.com>,
Brian Norris <computersforpeace@gmail.com>,
Rob Herring <robh+dt@kernel.org>,
Russell King <linux@arm.linux.org.uk>,
"hramrach@gmail.com" <hramrach@gmail.com>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-omap@vger.kernel.org" <linux-omap@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
"linux-spi@vger.kernel.org" <linux-spi@vger.kernel.org>
Subject: Re: [PATCH v5 3/5] mtd: devices: m25p80: add support for mmap read request
Date: Wed, 17 Feb 2016 21:41:10 +0530 [thread overview]
Message-ID: <56C49B9E.8060506@ti.com> (raw)
In-Reply-To: <20160216123854.GJ18327@sirena.org.uk>
On 02/16/2016 06:08 PM, Mark Brown wrote:
> On Tue, Feb 16, 2016 at 01:30:49PM +0530, Vignesh R wrote:
>> On 02/13/2016 04:07 AM, Mark Brown wrote:
>>> On Thu, Feb 11, 2016 at 11:03:50AM +0530, Vignesh R wrote:
>>>> On 02/10/2016 01:06 AM, Mark Brown wrote:
>
>>>>> Looking at this I can't help but think that spi_flash_read() ought to
>>>>> have the stub in rather than the caller. But given that we're pretty
>>>>> much only ever expecting one user I'm not 100% sure it actually matters.
>
>>>> Well, my initial patch set passed long list of arguments to
>>>> spi_flash_read(), but Brian suggested to use struct[1] in order to avoid
>>>> unnecessary churn when things need changed in the API.
>
>>> I don't see what that has to do with my point?
>
>> AFAIU, your previous comment was to move initialization of
>> spi_flash_read_message struct to spi_flash_read(). This would mean
>
> No, not at all. I'm talking about how we handle the case where we don't
> have hardware support for this and need to implement it in software -
> currently that's in a separate place to the place where we call the
> driver.
>
Yeah, but AFAIK, hardware accelerated read support is applicable for
m25p80 flashes only, I doubt whether spi_flash_read() will be used by
other types. I felt keeping the software implementation in m25p80_read()
will be consistent with m25p80_write().
--
Regards
Vignesh
next prev parent reply other threads:[~2016-02-17 16:11 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-11 4:09 [PATCH v5 0/5] Add memory mapped read support for ti-qspi Vignesh R
2015-12-11 4:09 ` [PATCH v5 1/5] spi: introduce accelerated read support for spi flash devices Vignesh R
2015-12-11 4:09 ` [PATCH v5 2/5] spi: spi-ti-qspi: add mmap mode read support Vignesh R
2015-12-11 4:09 ` [PATCH v5 3/5] mtd: devices: m25p80: add support for mmap read request Vignesh R
2016-02-09 19:36 ` Mark Brown
2016-02-11 5:33 ` Vignesh R
2016-02-12 22:37 ` Mark Brown
2016-02-16 8:00 ` Vignesh R
2016-02-16 12:38 ` Mark Brown
2016-02-17 16:11 ` R, Vignesh [this message]
2016-02-24 12:21 ` Vignesh R
2015-12-11 4:09 ` [PATCH v5 4/5] ARM: dts: DRA7: add entry for qspi mmap region Vignesh R
2015-12-11 15:09 ` Rob Herring
2015-12-17 18:45 ` Tony Lindgren
2015-12-18 5:50 ` Vignesh R
2015-12-18 16:42 ` Tony Lindgren
2015-12-11 4:10 ` [PATCH v5 5/5] ARM: dts: AM4372: " Vignesh R
2015-12-21 12:03 ` [PATCH v5 0/5] Add memory mapped read support for ti-qspi Vignesh R
2016-01-05 5:20 ` Vignesh R
2016-01-05 18:19 ` Mark Brown
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