i2c: tegra: Make tegra_i2c_flush_fifos() usable in atomic transfer

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The tegra_i2c_flush_fifos() shouldn't sleep in atomic transfer and jiffies
are not updating if interrupts are disabled. Let's switch to use iopoll
API helpers for register-polling. The iopoll API provides helpers for both
atomic and non-atomic cases.

Note that this patch doesn't fix any known problem because normally FIFO
is flushed at the time of starting a new transfer.

Reviewed-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

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Dmitry Osipenko 2020-09-30 01:18:44 +03:00 • committed by Wolfram Sang

parent 35baff672f

commit 900aed24d3

1 changed files with 16 additions and 9 deletions

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drivers/i2c/busses/i2c-tegra.c

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