Introduce the NRF GPIO Pad Group device driver and binding. The
pad group device represents the GPIO pads (pins), contrary to a
GPIO controller, which is one of the many devices which can be
muxed to pads in the pad group.
The pad group belong to a power domain, which is not neccesarily the
same power domain as devices being muxed to the pads, like GPIO or
UART. If no ACTIVE device is using any of the pads in the pad
group, the pad groups power domain may be SUSPENDED. Before the pad
groups power domain is SUSPENDED, pad config retention must be
enabled to prevent the pads from loosing their state. That's what
this device driver manages. Once retained, the pad configs and
outputs are locked, even when their power domain is SUSPENDED.
Signed-off-by: Bjarki Arge Andreasen <bjarki.andreasen@nordicsemi.no>
Support added for power domain regulation using TISCI added for
devices using the binding ti,sci-pm-domain.
This driver relies on the TISCI layer to make calls to the
device manager core to perform power management.
Signed-off-by: Dave Joseph <d-joseph@ti.com>
This driver triggers the TURN_ON and TURN_OFF actions for certain
power states. These power states are specified via device tree.
Signed-off-by: Mahesh Mahadevan <mahesh.mahadevan@nxp.com>
Power rails of some peripherals are controlled externally.
This is a case in embedded controllers, where the power of
some I2C devices are managed by the main application
processor.
To ensure that zephyr drivers access the devices where is
powered on, introduce a "monitoring" power domain. It works
by registering interrupt handler with gpio a pin, so that
when power state changes, it will notify relevant drivers.
Additionaly add CONFIG_POWER_DOMAIN_INIT_PRIORITY to replace
harcoded init priority.
Fixes: #51349
Signed-off-by: Albert Jakieła <jakiela@google.com>
Initial implementation of a simple GPIO controlled power domain.
It exposes no API of its own, all functionality is contained inside
the runtime power management callbacks.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
