NAME

       ofw_bus_get_status ofw_bus_status_okay ofw_bus_node_status_okay — check status of the device tree node

SYNOPSIS

       #include <dev/ofw/openfirm.h>
       #include <dev/ofw/ofw_bus.h>
       #include <dev/ofw/ofw_bus_subr.h>

       const char *
       ofw_bus_get_status(device_t dev);

       int
       ofw_bus_status_okay(device_t dev);

       int
       ofw_bus_node_status_okay(phandle_t node);

DESCRIPTION

       The  "status"  property of the device tree node indicates whether the device is enabled or not.  Multiple
       hardware versions might be built using the same base System-on-Chip but with a different  set  of  blocks
       enabled.   It  is  common to use  SoC device tree and only enable/disable device nodes for the derivative
       boards.  The device tree node is considered enabled only if it has "status" property with the  value  set
       to either "ok" or "okay".

       ofw_bus_get_status()  returns  the value of the "status" property of the device tree node associated with
       the device dev.  If the node does not have "status" property or there is  no  node  associated  with  the
       device the function returns NULL.

       ofw_bus_status_okay()  returns  1  if  the  device  tree node associated with the device dev has "status"
       property and its value is either "ok" or "okay".

       ofw_bus_node_status_okay() returns 1 if the device tree node node has "status" property and its value  is
       either "ok" or "okay".

AUTHORS

       This manual page was written by Oleksandr Tymoshenko.

Debian                                            April 8, 2018                           ofw_bus_status_okay(9)