Release 4.14 drivers/base/soc.c
/*
* Copyright (C) ST-Ericsson SA 2011
*
* Author: Lee Jones <lee.jones@linaro.org> for ST-Ericsson.
* License terms: GNU General Public License (GPL), version 2
*/
#include <linux/sysfs.h>
#include <linux/init.h>
#include <linux/stat.h>
#include <linux/slab.h>
#include <linux/idr.h>
#include <linux/spinlock.h>
#include <linux/sys_soc.h>
#include <linux/err.h>
#include <linux/glob.h>
static DEFINE_IDA(soc_ida);
static ssize_t soc_info_get(struct device *dev,
struct device_attribute *attr,
char *buf);
struct soc_device {
struct device dev;
struct soc_device_attribute *attr;
int soc_dev_num;
};
static struct bus_type soc_bus_type = {
.name = "soc",
};
static DEVICE_ATTR(machine, S_IRUGO, soc_info_get, NULL);
static DEVICE_ATTR(family, S_IRUGO, soc_info_get, NULL);
static DEVICE_ATTR(soc_id, S_IRUGO, soc_info_get, NULL);
static DEVICE_ATTR(revision, S_IRUGO, soc_info_get, NULL);
struct device *soc_device_to_device(struct soc_device *soc_dev)
{
return &soc_dev->dev;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Lee Jones | 18 | 100.00% | 1 | 100.00% |
Total | 18 | 100.00% | 1 | 100.00% |
static umode_t soc_attribute_mode(struct kobject *kobj,
struct attribute *attr,
int index)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct soc_device *soc_dev = container_of(dev, struct soc_device, dev);
if ((attr == &dev_attr_machine.attr)
&& (soc_dev->attr->machine != NULL))
return attr->mode;
if ((attr == &dev_attr_family.attr)
&& (soc_dev->attr->family != NULL))
return attr->mode;
if ((attr == &dev_attr_revision.attr)
&& (soc_dev->attr->revision != NULL))
return attr->mode;
if ((attr == &dev_attr_soc_id.attr)
&& (soc_dev->attr->soc_id != NULL))
return attr->mode;
/* Unknown or unfilled attribute. */
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Lee Jones | 156 | 99.36% | 1 | 50.00% |
Al Viro | 1 | 0.64% | 1 | 50.00% |
Total | 157 | 100.00% | 2 | 100.00% |
static ssize_t soc_info_get(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct soc_device *soc_dev = container_of(dev, struct soc_device, dev);
if (attr == &dev_attr_machine)
return sprintf(buf, "%s\n", soc_dev->attr->machine);
if (attr == &dev_attr_family)
return sprintf(buf, "%s\n", soc_dev->attr->family);
if (attr == &dev_attr_revision)
return sprintf(buf, "%s\n", soc_dev->attr->revision);
if (attr == &dev_attr_soc_id)
return sprintf(buf, "%s\n", soc_dev->attr->soc_id);
return -EINVAL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Lee Jones | 123 | 100.00% | 1 | 100.00% |
Total | 123 | 100.00% | 1 | 100.00% |
static struct attribute *soc_attr[] = {
&dev_attr_machine.attr,
&dev_attr_family.attr,
&dev_attr_soc_id.attr,
&dev_attr_revision.attr,
NULL,
};
static const struct attribute_group soc_attr_group = {
.attrs = soc_attr,
.is_visible = soc_attribute_mode,
};
static const struct attribute_group *soc_attr_groups[] = {
&soc_attr_group,
NULL,
};
static void soc_release(struct device *dev)
{
struct soc_device *soc_dev = container_of(dev, struct soc_device, dev);
kfree(soc_dev);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Lee Jones | 31 | 100.00% | 1 | 100.00% |
Total | 31 | 100.00% | 1 | 100.00% |
static struct soc_device_attribute *early_soc_dev_attr;
struct soc_device *soc_device_register(struct soc_device_attribute *soc_dev_attr)
{
struct soc_device *soc_dev;
int ret;
if (!soc_bus_type.p) {
if (early_soc_dev_attr)
return ERR_PTR(-EBUSY);
early_soc_dev_attr = soc_dev_attr;
return NULL;
}
soc_dev = kzalloc(sizeof(*soc_dev), GFP_KERNEL);
if (!soc_dev) {
ret = -ENOMEM;
goto out1;
}
/* Fetch a unique (reclaimable) SOC ID. */
ret = ida_simple_get(&soc_ida, 0, 0, GFP_KERNEL);
if (ret < 0)
goto out2;
soc_dev->soc_dev_num = ret;
soc_dev->attr = soc_dev_attr;
soc_dev->dev.bus = &soc_bus_type;
soc_dev->dev.groups = soc_attr_groups;
soc_dev->dev.release = soc_release;
dev_set_name(&soc_dev->dev, "soc%d", soc_dev->soc_dev_num);
ret = device_register(&soc_dev->dev);
if (ret)
goto out3;
return soc_dev;
out3:
ida_simple_remove(&soc_ida, soc_dev->soc_dev_num);
out2:
kfree(soc_dev);
out1:
return ERR_PTR(ret);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Lee Jones | 155 | 78.68% | 1 | 25.00% |
Geert Uytterhoeven | 27 | 13.71% | 2 | 50.00% |
Lee Duncan | 15 | 7.61% | 1 | 25.00% |
Total | 197 | 100.00% | 4 | 100.00% |
/* Ensure soc_dev->attr is freed prior to calling soc_device_unregister. */
void soc_device_unregister(struct soc_device *soc_dev)
{
ida_simple_remove(&soc_ida, soc_dev->soc_dev_num);
device_unregister(&soc_dev->dev);
early_soc_dev_attr = NULL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Lee Jones | 27 | 84.38% | 1 | 33.33% |
Geert Uytterhoeven | 4 | 12.50% | 1 | 33.33% |
Lee Duncan | 1 | 3.12% | 1 | 33.33% |
Total | 32 | 100.00% | 3 | 100.00% |
static int __init soc_bus_register(void)
{
int ret;
ret = bus_register(&soc_bus_type);
if (ret)
return ret;
if (early_soc_dev_attr)
return PTR_ERR(soc_device_register(early_soc_dev_attr));
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Geert Uytterhoeven | 30 | 69.77% | 2 | 66.67% |
Lee Jones | 13 | 30.23% | 1 | 33.33% |
Total | 43 | 100.00% | 3 | 100.00% |
core_initcall(soc_bus_register);
static int soc_device_match_attr(const struct soc_device_attribute *attr,
const struct soc_device_attribute *match)
{
if (match->machine &&
(!attr->machine || !glob_match(match->machine, attr->machine)))
return 0;
if (match->family &&
(!attr->family || !glob_match(match->family, attr->family)))
return 0;
if (match->revision &&
(!attr->revision || !glob_match(match->revision, attr->revision)))
return 0;
if (match->soc_id &&
(!attr->soc_id || !glob_match(match->soc_id, attr->soc_id)))
return 0;
return 1;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Arnd Bergmann | 99 | 74.44% | 1 | 33.33% |
Geert Uytterhoeven | 34 | 25.56% | 2 | 66.67% |
Total | 133 | 100.00% | 3 | 100.00% |
static int soc_device_match_one(struct device *dev, void *arg)
{
struct soc_device *soc_dev = container_of(dev, struct soc_device, dev);
return soc_device_match_attr(soc_dev->attr, arg);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Geert Uytterhoeven | 40 | 100.00% | 1 | 100.00% |
Total | 40 | 100.00% | 1 | 100.00% |
/*
* soc_device_match - identify the SoC in the machine
* @matches: zero-terminated array of possible matches
*
* returns the first matching entry of the argument array, or NULL
* if none of them match.
*
* This function is meant as a helper in place of of_match_node()
* in cases where either no device tree is available or the information
* in a device node is insufficient to identify a particular variant
* by its compatible strings or other properties. For new devices,
* the DT binding should always provide unique compatible strings
* that allow the use of of_match_node() instead.
*
* The calling function can use the .data entry of the
* soc_device_attribute to pass a structure or function pointer for
* each entry.
*/
const struct soc_device_attribute *soc_device_match(
const struct soc_device_attribute *matches)
{
int ret = 0;
if (!matches)
return NULL;
while (!ret) {
if (!(matches->machine || matches->family ||
matches->revision || matches->soc_id))
break;
ret = bus_for_each_dev(&soc_bus_type, NULL, (void *)matches,
soc_device_match_one);
if (ret < 0 && early_soc_dev_attr)
ret = soc_device_match_attr(early_soc_dev_attr,
matches);
if (ret < 0)
return NULL;
if (!ret)
matches++;
else
return matches;
}
return NULL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Arnd Bergmann | 89 | 77.39% | 1 | 33.33% |
Geert Uytterhoeven | 26 | 22.61% | 2 | 66.67% |
Total | 115 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(soc_device_match);
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Lee Jones | 720 | 65.40% | 2 | 22.22% |
Arnd Bergmann | 197 | 17.89% | 1 | 11.11% |
Geert Uytterhoeven | 167 | 15.17% | 4 | 44.44% |
Lee Duncan | 16 | 1.45% | 1 | 11.11% |
Al Viro | 1 | 0.09% | 1 | 11.11% |
Total | 1101 | 100.00% | 9 | 100.00% |
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