From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Mark Brown <broonie@kernel.org>, <linux-spi@vger.kernel.org>
Cc: Samuel Holland <samuel@sholland.org>,
Chen-Yu Tsai <wens@csie.org>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Tudor Ambarus <tudor.ambarus@linaro.org>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Claudiu Beznea <claudiu.beznea@microchip.com>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 0/3] spi: Helper for deriving timeout values
Date: Thu, 22 Jun 2023 11:06:31 +0200 [thread overview]
Message-ID: <20230622090634.3411468-1-miquel.raynal@bootlin.com> (raw)
Hello,
I recently came across an issue with the Atmel spi controller driver
which would stop my transfers after a too small timeout when performing
big transfers (reading a 4MiB flash in one transfer). My initial idea
was to derive a the maximum amount of time a transfer would take
depending on its size and use that as value to avoid erroring-out when
not relevant. Mark wanted to go further by creating a core helper doing
that, based on the heuristics from the sun6i driver.
Here is a small series of 3 patches doing exactly that.
Cheers,
Miquèl
Changes in v3:
* Collected a tag.
* As my platform runs on 6.1 currently, I cherry-picked a mainline patch
changing s/master/host/ in the atmel controller driver and modified the
series to fit the new naming. I then cherry-picked my three patches and
verified it compiled correctly against a v6.4-rc1.
Miquel Raynal (3):
spi: Create a helper to derive adaptive timeouts
spi: atmel: Prevent false timeouts on long transfers
spi: sun6i: Use the new helper to derive the xfer timeout value
drivers/spi/spi-atmel.c | 18 +++++++++++-------
drivers/spi/spi-sun6i.c | 2 +-
include/linux/spi/spi.h | 17 +++++++++++++++++
3 files changed, 29 insertions(+), 8 deletions(-)
--
2.34.1
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next reply other threads:[~2023-06-22 9:07 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-22 9:06 Miquel Raynal [this message]
2023-06-22 9:06 ` [PATCH v3 1/3] spi: Create a helper to derive adaptive timeouts Miquel Raynal
2023-06-22 9:06 ` [PATCH v3 2/3] spi: atmel: Prevent false timeouts on long transfers Miquel Raynal
2023-06-22 16:29 ` Ryan.Wanner
2023-06-22 9:06 ` [PATCH v3 3/3] spi: sun6i: Use the new helper to derive the xfer timeout value Miquel Raynal
2023-06-22 16:46 ` [PATCH v3 0/3] spi: Helper for deriving timeout values Jernej Škrabec
2023-06-22 21:18 ` Miquel Raynal
2023-06-23 0:32 ` Mark Brown
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