[#5689] while two or multi spi devices use gpio cs, spi setup will fail
Submitted By: Barry Song
Open Date
2009-11-17 03:30:51
Priority:
Medium Assignee:
Barry Song
Status:
Open Fixed In Release:
N/A
Found In Release:
2010R1 Release:
Category:
N/A Board:
N/A
Processor:
ALL Silicon Revision:
Is this bug repeatable?:
Yes Resolution:
Fixed
Uboot version or rev.:
Toolchain version or rev.:
gcc 4.3.4 (svn-3672)
App binary format:
N/A
Summary: while two or multi spi devices use gpio cs, spi setup will fail
Details:
Our arch define .chip_select = 0 to use gpio cs, but that will trigger spi core to block the 2nd device to setup since chip_select is understood by spi core as a valid cs.
Wrong information is like:
modprobe spi_bfin5xx.ko
bfin-spi bfin-spi.0: chipselect 0 already in use
So we can't use the same cs id 0 for all devices using gpio cs. A different way must be used.
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