Messages in this thread | | | Date | Fri, 14 Feb 2014 15:54:38 +0800 | From | Jisheng Zhang <> | Subject | use {readl|writel}_relaxed instead of readl/writel in i2c-designware-core ? |
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Hi all,
The writel/readl is too expensive especially on Cortex A9 w/ outer L2 cache. This introduce i2c read/write error on Marvell Berlin SoCs when there are L2 cache maintenance operations at the same time.
In our internal berlin bsp, we just replaced readl/writel with the relaxed version. But AFAIK, the "relaxed" version doesn't exist on all architectures. How to handle this issue?
Any suggestions are appreciated.
Thanks in advance, Jisheng
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