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Expand OpenFirmware API with ofw_bus_node_status_okay

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method

Method could be used before we can access device_t structure.
As per simple phandle_t handle we can access FDT to check
if specified node has been enabled.
It will be used in Marvell's common configuration code.

Submitted by:          Konrad Adamczyk <ka@semihalf.com>
Obtained from:         Semihalf
Sponsored by:          Stormshield
Reviewed by:           zbb, meloun-miracle-cz
Differential revision: https://reviews.freebsd.org/D9218
This commit is contained in:
Wojciech Macek 2017-01-25 10:28:21 +00:00
parent c0f1c1f8ff
commit e5e94d2de9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=312745
2 changed files with 20 additions and 0 deletions
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19
sys/dev/ofw/ofw_bus_subr.c
View File

@ -46,6 +46,7 @@ __FBSDID("$FreeBSD$");
#include "ofw_bus_if.h"
#define OFW_COMPAT_LEN 255
#define OFW_STATUS_LEN 16
int
ofw_bus_gen_setup_devinfo(struct ofw_bus_devinfo *obd, phandle_t node)
@ -179,6 +180,24 @@ ofw_bus_status_okay(device_t dev)
return (0);
}
int
ofw_bus_node_status_okay(phandle_t node)
{
char status[OFW_STATUS_LEN];
int len;
len = OF_getproplen(node, "status");
if (len <= 0)
return (1);
OF_getprop(node, "status", status, OFW_STATUS_LEN);
if ((len == 5 && (bcmp(status, "okay", len) == 0)) ||
(len == 3 && (bcmp(status, "ok", len))))
return (1);
return (0);
}
static int
ofw_bus_node_is_compatible_int(const char *compat, int len,
const char *onecompat)

1
sys/dev/ofw/ofw_bus_subr.h
View File

@ -100,6 +100,7 @@ int ofw_bus_intr_by_rid(device_t, phandle_t, int, phandle_t *, int *,
/* Helper to get device status property */
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);
/* Helper to get node's interrupt parent */
phandle_t ofw_bus_find_iparent(phandle_t);