i2c: mediatek: add i2c first write then read optimization

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For platform with auto restart support, between every transfer,
i2c controller will trigger an interrupt and SW need to handle
it to start new transfer. When doing write-then-read transfer,
instead of restart mechanism, using WRRD mode to have controller
send both transfer in one request to reduce latency.

Signed-off-by: Liguo Zhang <liguo.zhang@mediatek.com>
Reviewed-by: Eddie Huang <eddie.huang@mediatek.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

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Liguo Zhang 2015-11-09 13:43:58 +08:00 • committed by Wolfram Sang

parent 948c58a03a

commit 173b77e8d8

1 changed files with 27 additions and 6 deletions

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33

drivers/i2c/busses/i2c-mt65xx.c

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