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/freebsd-10.2-release/sys/arm/xscale/ixp425/
H A Dcambria_exp_space.c194670 Mon Jun 22 22:56:29 MDT 2009 sam o add a bus space tag that forces a 2usec delay between r/w ops; this is
used for the optional GPS+RS485 uarts on the Gateworks Cambria boards
which otherwise are unreliable
o setup the hack bus space tag for the GPS+RS485 uarts
o program the gpio interrupts for the uarts to be edge-rising
o force timing on the expansion bus for the uarts to be "slow"

Thanks to Chris Lang of Gateworks for these tips.
H A Dfiles.aviladiff 194670 Mon Jun 22 22:56:29 MDT 2009 sam o add a bus space tag that forces a 2usec delay between r/w ops; this is
used for the optional GPS+RS485 uarts on the Gateworks Cambria boards
which otherwise are unreliable
o setup the hack bus space tag for the GPS+RS485 uarts
o program the gpio interrupts for the uarts to be edge-rising
o force timing on the expansion bus for the uarts to be "slow"

Thanks to Chris Lang of Gateworks for these tips.
H A Dixp425var.hdiff 194670 Mon Jun 22 22:56:29 MDT 2009 sam o add a bus space tag that forces a 2usec delay between r/w ops; this is
used for the optional GPS+RS485 uarts on the Gateworks Cambria boards
which otherwise are unreliable
o setup the hack bus space tag for the GPS+RS485 uarts
o program the gpio interrupts for the uarts to be edge-rising
o force timing on the expansion bus for the uarts to be "slow"

Thanks to Chris Lang of Gateworks for these tips.
H A Dixp425.cdiff 194670 Mon Jun 22 22:56:29 MDT 2009 sam o add a bus space tag that forces a 2usec delay between r/w ops; this is
used for the optional GPS+RS485 uarts on the Gateworks Cambria boards
which otherwise are unreliable
o setup the hack bus space tag for the GPS+RS485 uarts
o program the gpio interrupts for the uarts to be edge-rising
o force timing on the expansion bus for the uarts to be "slow"

Thanks to Chris Lang of Gateworks for these tips.

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