9 Sep
2014
9 Sep
'14
4:53 p.m.
On 19/08/2014 17:54, Stefan Agner wrote:
The status register 1 (S1) is not writeable, hence we should not write it. In order to clear the RDRF flag we only need to read the data register.
Also, when stressing U-Boot a lot with serial input, an overflow can occur which asserts the S1_OR flag (while not asserting the S1_RDRF flag). To clear this flag we again just need to read the data register, hence add this flag to the abort conditions for the while loop.
Insert a compiler barrier to make sure reading the data register gets executed after reading the status register.
Signed-off-by: Stefan Agner stefan@agner.ch
Applied to u-boot-imx, thanks!
Best regards, Stefano Babic
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