In order to prevent confusing problems where pin configuration is not
be applied, an upcoming change to the overlaycheck utility will add a
check that all added pin groups are in some way referenced by the
overlay. Before that can be done, it is necessary to ensure that all
existing overlays pass that test.
This patch modifies some overlays by adding the required "pinctrl-0"
properties, but for others that are just setting GPIOs to inputs and
outputs, where those same GPIOs are declared by <name>-gpios properties,
it is better to drop the pin groups and let the GPIO subsystem set up
the GPIOs as required. Removing this duplication may be helpful in the
future should we ever decide to enable the exclusive GPIO vs pinctrl
locking (.strict in struct pinmux_ops).
See: https://forums.raspberrypi.com/viewtopic.php?t=393742
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
Add an overlay to allow composite video to be output on GPIOs 4-11
on Raspberry Pi 5, 500, 500+ or CM5 only, with an optional 108 MHz
clock on GPIO 0 and duplicate MSB on GPIO 27.
Requires composite video to be enabled and DPI to be disabled.
Signed-off-by: Nick Hollinghurst <nick.hollinghurst@raspberrypi.com>
