R10.3, IMX53
I
try to enable UART3 DMA mode, and get below errors:
UART: DMA_ERROR: sr1:2040 sr2:508c
UART: DMA_ERROR: sr1:2040 sr2:5088
My uart3 connnect to a bluetooth module, and only first serval DMA-read operations occur this error, sequential DMA-read will successful.
I patch several commits from 10.4 including the one which update UART SDMA scripts, but this error still occurs.
BTW, I noticed this git commit:
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commit a77a4c4f12640c414adf8c4381cb1d8eb8364dd0
Author: Zhang Jiejing <jiejing.zhang@freescale.com>
Date: Wed Dec 8 20:24:04 2010 +0800
ENGR00137669-3 MX53_SMD: workaround for UART have problem when DMA enable.
There is a clock issue when UART3 enable DMA, so disable this.
Signed-off-by: Zhang Jiejing <jiejing.zhang@freescale.com>
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what's mean "a clock issue"? any detail?
BR
wenpeng
