[PATCH v3 0/3] spi: Helper for deriving timeout values

[Miquel Raynal <miquel.raynal@xxxxxxxxxxx>]

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(-)

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2.34.1