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Set proper ATA UDMA mode for bf548 according to system clock.
authorsonic zhang <sonic.adi@gmail.com>
Tue, 27 Nov 2007 04:47:39 +0000 (12:47 +0800)
committerJeff Garzik <jeff@garzik.org>
Sat, 1 Dec 2007 22:35:58 +0000 (17:35 -0500)
UDMA Mode - Frequency compatibility

UDMA5 - 100 MB/s   - SCLK  = 133 MHz
UDMA4 - 66 MB/s    - SCLK >=  80 MHz
UDMA3 - 44.4 MB/s  - SCLK >=  50 MHz
UDMA2 - 33 MB/s    - SCLK >=  40 MHz

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

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