From: Mark Brown <broonie@kernel.org>
To: Sergey Suloev <ssuloev@orpaltech.com>
Cc: Maxime Ripard <maxime.ripard@bootlin.com>,
Chen-Yu Tsai <wens@csie.org>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-spi@vger.kernel.org
Subject: Re: [PATCH v3 3/6] spi: sun6i: restrict transfer length in PIO-mode
Date: Thu, 5 Apr 2018 14:17:35 +0100 [thread overview]
Message-ID: <20180405131735.GB12349@sirena.org.uk> (raw)
In-Reply-To: <ee4adb1e-caf6-32f6-33d6-d8dd94d232cf@orpaltech.com>
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On Thu, Apr 05, 2018 at 12:59:35PM +0300, Sergey Suloev wrote:
> On 04/05/2018 12:19 PM, Maxime Ripard wrote:
> > The point of that patch was precisely to allow to send more data than
> > the FIFO. You're breaking that behaviour without any justification,
> > and this is not ok.
> I am sorry, but you can't. That's a hardware limitation.
Are you positive about that? Normally you can add things to hardware
FIFOs while they're being drained so so long as you can keep data
flowing in at least as fast as it's being consumed.
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next prev parent reply other threads:[~2018-04-05 13:17 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-03 15:44 [PATCH v3 0/6] spi: Add support for DMA transfers in sun6i SPI driver Sergey Suloev
2018-04-03 15:44 ` [PATCH v3 1/6] spi: sun6i: coding style/readability improvements Sergey Suloev
2018-04-04 6:45 ` Maxime Ripard
2018-04-03 15:44 ` [PATCH v3 2/6] spi: sun6i: handle chip select polarity flag Sergey Suloev
2018-04-03 15:44 ` [PATCH v3 3/6] spi: sun6i: restrict transfer length in PIO-mode Sergey Suloev
2018-04-04 6:50 ` Maxime Ripard
2018-04-04 11:35 ` Sergey Suloev
2018-04-05 9:19 ` Maxime Ripard
2018-04-05 9:59 ` Sergey Suloev
2018-04-05 13:17 ` Mark Brown [this message]
2018-04-05 13:44 ` Sergey Suloev
2018-04-06 7:34 ` Maxime Ripard
2018-04-06 15:48 ` Sergey Suloev
2018-04-09 9:27 ` Maxime Ripard
2018-04-09 10:26 ` Sergey Suloev
2018-04-09 10:50 ` Mark Brown
2018-04-09 11:10 ` Sergey Suloev
2018-04-09 11:27 ` Mark Brown
2018-04-09 11:36 ` Maxime Ripard
2018-04-09 11:59 ` Sergey Suloev
2018-04-10 14:05 ` Maxime Ripard
2018-04-06 15:54 ` Sergey Suloev
2018-04-05 10:07 ` Mark Brown
2018-04-03 15:44 ` [PATCH v3 4/6] spi: sun6i: use completion provided by SPI core Sergey Suloev
2018-04-04 6:53 ` Maxime Ripard
2018-04-03 15:44 ` [PATCH v3 5/6] spi: sun6i: introduce register set/unset helpers Sergey Suloev
2018-04-04 1:32 ` kbuild test robot
2018-04-04 7:02 ` Maxime Ripard
2018-04-03 15:44 ` [PATCH v3 6/6] spi: sun6i: add DMA transfers support Sergey Suloev
2018-04-04 7:00 ` Maxime Ripard
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