i2c: imx: use clk notifier for rate changes

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Instead of repeatedly calling clk_get_rate for each transfer, register
a clock notifier to update the cached divider value each time the clock
rate actually changes.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

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Lucas Stach 2018-03-08 14:25:17 +01:00 • committed by Wolfram Sang

parent 398432edde

commit 90ad2cbe88

1 changed files with 25 additions and 7 deletions

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drivers/i2c/busses/i2c-imx.c

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