* Laurent Pinchart <laurent.pinch...@ideasonboard.com> [151012 14:17]:
> Hello,
>
> While working on regulators, GPIOs and DT I noticed that many of our DT source
> files incorrectly describe fixed regulators. The common error patterns are
>
> - Usage of the undefined (and never parsed) enable-active-low property
> - Usage of the enable-active-high property without specifying an enable GPIO
> - Typos in the enabl GPIO property name (gpios instead of gpio)
> - Mismatch between the enable-active-high property (or the lack thereof) and
> the enable GPIO flags
>
> This patch series fixes those issues in all the DT sources after locating the
> errors using the following script.
>
> ------------------------------------------------------------------------------
> #!/bin/sh
>
> echo $1
> cat $1 | awk '
> BEGIN {
> open_drain = 0;
> active_high = 0;
> gpio = 0;
> flags = 0;
> }
>
> match($0, /([a-zA-Z0-9@_-]*) {/, ary) {
> name = ary[1];
> }
>
> /compatible.*"regulator-fixed"/ {
> found = 1;
> }
>
> /enable-active-high/ {
> active_high = 1;
> }
>
> /gpio-open-drain/ {
> open_drain = 1;
> }
>
> match($0, /gpio += <.* ([^ ]*)>/, ary) {
> gpio = 1;
> flags = ary[1];
> if (flags == 0)
> flags = "GPIO_ACTIVE_HIGH";
> }
>
> /}/ {
> if (found) {
> if (gpio) {
> print "\t" name ": active high " active_high " " flags
> " open drain " open_drain;
> if ((active_high && flags == "GPIO_ACTIVE_LOW") ||
> (!active_high && flags == "GPIO_ACTIVE_HIGH"))
> print "WARNING: enable-active-high and flags do
> not match"
> } else {
> if (active_high)
> print "WARNING: active high without GPIO"
> if (open_drain)
> print "WARNING: open drain without GPIO"
> }
> }
>
> gpio = 0;
> found = 0;
> active_high = 0;
> open_drain = 0;
> flags = 0;
> }
> '
> ------------------------------------------------------------------------------
>
> All patches except for the ones touching omap3-beagle-xm and omap3-overo-base
> are untested as I lack test hardware.
>
> As there's no dependency between the patches touching different source files
> the appropriate maintainers could take their share of the patches in their
> tree. Alternatively I could send a single pull request after collecting all
> acks but that might be more complex.
Nice clean-up. For omaps, there's an earlier patch posted by
Javier Martinez Canillas <jav...@osg.samsung.com> as "[PATCH] ARM: dts: Use
defined GPIO constants in flags cell for OMAP2+ boards". Can you guys do some
cross checking and let me know which combination I should appluy for omaps?
Regards,
Tony
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