mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-14 06:06:51 +07:00
09e67ca2c5
Commit 140b932f8c ("Create modalias file
in sysfs for of_platform bus") needs this to avoid breaking the sparc
builds.
Just move the code and add whitespace around some binary operators.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
155 lines
3.3 KiB
C
155 lines
3.3 KiB
C
#include <linux/string.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <asm/errno.h>
|
|
|
|
/**
|
|
* of_match_device - Tell if an of_device structure has a matching
|
|
* of_match structure
|
|
* @ids: array of of device match structures to search in
|
|
* @dev: the of device structure to match against
|
|
*
|
|
* Used by a driver to check whether an of_device present in the
|
|
* system is in its list of supported devices.
|
|
*/
|
|
const struct of_device_id *of_match_device(const struct of_device_id *matches,
|
|
const struct of_device *dev)
|
|
{
|
|
if (!dev->node)
|
|
return NULL;
|
|
return of_match_node(matches, dev->node);
|
|
}
|
|
EXPORT_SYMBOL(of_match_device);
|
|
|
|
struct of_device *of_dev_get(struct of_device *dev)
|
|
{
|
|
struct device *tmp;
|
|
|
|
if (!dev)
|
|
return NULL;
|
|
tmp = get_device(&dev->dev);
|
|
if (tmp)
|
|
return to_of_device(tmp);
|
|
else
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(of_dev_get);
|
|
|
|
void of_dev_put(struct of_device *dev)
|
|
{
|
|
if (dev)
|
|
put_device(&dev->dev);
|
|
}
|
|
EXPORT_SYMBOL(of_dev_put);
|
|
|
|
static ssize_t devspec_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct of_device *ofdev;
|
|
|
|
ofdev = to_of_device(dev);
|
|
return sprintf(buf, "%s\n", ofdev->node->full_name);
|
|
}
|
|
|
|
static ssize_t modalias_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct of_device *ofdev = to_of_device(dev);
|
|
ssize_t len = 0;
|
|
|
|
len = of_device_get_modalias(ofdev, buf, PAGE_SIZE - 2);
|
|
buf[len] = '\n';
|
|
buf[len+1] = 0;
|
|
return len+1;
|
|
}
|
|
|
|
struct device_attribute of_platform_device_attrs[] = {
|
|
__ATTR_RO(devspec),
|
|
__ATTR_RO(modalias),
|
|
__ATTR_NULL
|
|
};
|
|
|
|
/**
|
|
* of_release_dev - free an of device structure when all users of it are finished.
|
|
* @dev: device that's been disconnected
|
|
*
|
|
* Will be called only by the device core when all users of this of device are
|
|
* done.
|
|
*/
|
|
void of_release_dev(struct device *dev)
|
|
{
|
|
struct of_device *ofdev;
|
|
|
|
ofdev = to_of_device(dev);
|
|
of_node_put(ofdev->node);
|
|
kfree(ofdev);
|
|
}
|
|
EXPORT_SYMBOL(of_release_dev);
|
|
|
|
int of_device_register(struct of_device *ofdev)
|
|
{
|
|
BUG_ON(ofdev->node == NULL);
|
|
return device_register(&ofdev->dev);
|
|
}
|
|
EXPORT_SYMBOL(of_device_register);
|
|
|
|
void of_device_unregister(struct of_device *ofdev)
|
|
{
|
|
device_unregister(&ofdev->dev);
|
|
}
|
|
EXPORT_SYMBOL(of_device_unregister);
|
|
|
|
ssize_t of_device_get_modalias(struct of_device *ofdev,
|
|
char *str, ssize_t len)
|
|
{
|
|
const char *compat;
|
|
int cplen, i;
|
|
ssize_t tsize, csize, repend;
|
|
|
|
/* Name & Type */
|
|
csize = snprintf(str, len, "of:N%sT%s",
|
|
ofdev->node->name, ofdev->node->type);
|
|
|
|
/* Get compatible property if any */
|
|
compat = of_get_property(ofdev->node, "compatible", &cplen);
|
|
if (!compat)
|
|
return csize;
|
|
|
|
/* Find true end (we tolerate multiple \0 at the end */
|
|
for (i = (cplen - 1); i >= 0 && !compat[i]; i--)
|
|
cplen--;
|
|
if (!cplen)
|
|
return csize;
|
|
cplen++;
|
|
|
|
/* Check space (need cplen+1 chars including final \0) */
|
|
tsize = csize + cplen;
|
|
repend = tsize;
|
|
|
|
if (csize >= len) /* @ the limit, all is already filled */
|
|
return tsize;
|
|
|
|
if (tsize >= len) { /* limit compat list */
|
|
cplen = len - csize - 1;
|
|
repend = len;
|
|
}
|
|
|
|
/* Copy and do char replacement */
|
|
memcpy(&str[csize + 1], compat, cplen);
|
|
for (i = csize; i < repend; i++) {
|
|
char c = str[i];
|
|
if (c == '\0')
|
|
str[i] = 'C';
|
|
else if (c == ' ')
|
|
str[i] = '_';
|
|
}
|
|
|
|
return tsize;
|
|
}
|