tree 8cc1a3721b31d7b09fd260c6bd86e960b2d91ee5
parent 7ef31e9c4e711bfb817a15b54e428e5c4a7c0032
author David Brownell <david-b@pacbell.net> 1213781503 -0700
committer Haavard Skinnemoen <haavard.skinnemoen@atmel.com> 1214573549 +0200

at32ap700x spi: enable pullups on MISO

This is a minor tweak to the at32ap700x pin configuration for the SPI
input pin (MISO), enabling the on-chip weak pullup (typical 190K) to

  (a) ensure a fixed data value for missing or input-only slaves;

  (b) prevent power waste associated with inputs floating near VDDIO/2.

Atmel's boards have no external pullup or pulldown on these pins, so
it's unlikely other boards would address these issues with external
pulldowns.  Were there trouble, board-specific code could turn off
the relevant pullup(s).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>