ARM: dts: Fix omap3 off mode pull defines
authorTony Lindgren <tony@atomide.com>
Thu, 5 Jan 2017 19:07:18 +0000 (11:07 -0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 21 Nov 2017 08:21:19 +0000 (09:21 +0100)
commit4fd669feacd371d39b534b6f16414bf377cf0d6e
treed3acd9cf649a308c55a1ac62a803716220d6eb97
parent955840ea50355cdd400683b1ee5c3ac0017cc160
ARM: dts: Fix omap3 off mode pull defines

[ Upstream commit d97556c8012015901a3ce77f46960078139cd79d ]

We need to also have OFFPULLUDENABLE bit set to use the off mode pull values.
Otherwise the line is pulled down internally if no external pull exists.

This is has some documentation at:

http://processors.wiki.ti.com/index.php/Optimizing_OMAP35x_and_AM/DM37x_OFF_mode_PAD_configuration

Note that the value is still glitchy during off mode transitions as documented
in spz319f.pdf "Advisory 1.45". It's best to use external pulls instead of
relying on the internal ones for off mode and even then anything pulled up
will get driven down momentarily on off mode restore for GPIO banks other
than bank1.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
include/dt-bindings/pinctrl/omap.h