tree 1e41ed69bee55104040500de9cbfd8f86bc896c6
parent 628ffd73bcff0c9f3bc5a8eeb2c7455fe9d28a51
author Nick Spence <nick.spence@freescale.com> 1219474370 -0700
committer Kim Phillips <kim.phillips@freescale.com> 1220476006 -0500

MPC83XX: Fix GPIO configuration - set gpio level before direction

Set DAT value before DIR values to avoid creating glitches on the
GPIO signals.

Set gpio level register before direction register to inhibit
glitches on high level output pins.

Dir and data gets cleared at powerup, so high level output lines see
a short low pulse between setting the direction and level registers.

Issue was seen on a new board with the nReset line of the NOR flash
connected to a GPIO. Setting the direction register puts the NOR flash
in reset so the next instruction to set the level cannot get executed.

Signed-off-by: Nick Spence <nick.spence@freescale.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>