Hello,

I'm getting the kernel log messages early in the bootup sequence (kernel 
3.6.1 mainline)
[    0.121337] GPMC revision 5.0
[    0.121582] gpmc: irq-20 could not claim: err -22

this is on beagleboard, which is calling omap_nand_flash_init(), so no 
omap_nand_platform_data specified in board file

NAND still works since it is operated in NAND_OMAP_PREFETCH_POLLED mode; 
however, I'd like to try NAND_OMAP_PREFETCH_IRQ to see if it brings any 
performance gains

just passing NAND_OMAP_PREFETCH_IRQ via gmpc_nand_init() hangs the kernel 
(I guess since the request_irq() failed earlier)

another question is dev_ready which also seems to depend on IRQ also

can you make any recommendation w.r.t NAND performance on OMAP?

thanks, regards, p.

-- 

Peter Meerwald
+43-664-2444418 (mobile)
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