Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Lee Jones | 719 | 60.52% | 2 | 14.29% |
Arnd Bergmann | 197 | 16.58% | 1 | 7.14% |
Geert Uytterhoeven | 167 | 14.06% | 4 | 28.57% |
Björn Andersson | 64 | 5.39% | 1 | 7.14% |
Lee Duncan | 16 | 1.35% | 1 | 7.14% |
Arvind Yadav | 12 | 1.01% | 1 | 7.14% |
Vinod Koul | 10 | 0.84% | 1 | 7.14% |
Greg Kroah-Hartman | 2 | 0.17% | 2 | 14.29% |
Al Viro | 1 | 0.08% | 1 | 7.14% |
Total | 1188 | 14 |
// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) ST-Ericsson SA 2011 * * Author: Lee Jones <lee.jones@linaro.org> for ST-Ericsson. */ #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(serial_number, 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; } 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_serial_number.attr) && (soc_dev->attr->serial_number != 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; } 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_serial_number) return sprintf(buf, "%s\n", soc_dev->attr->serial_number); if (attr == &dev_attr_soc_id) return sprintf(buf, "%s\n", soc_dev->attr->soc_id); return -EINVAL; } static struct attribute *soc_attr[] = { &dev_attr_machine.attr, &dev_attr_family.attr, &dev_attr_serial_number.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); } 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); put_device(&soc_dev->dev); soc_dev = NULL; out2: kfree(soc_dev); out1: return ERR_PTR(ret); } EXPORT_SYMBOL_GPL(soc_device_register); /* 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; } EXPORT_SYMBOL_GPL(soc_device_unregister); 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; } 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; } 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); } /* * 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; } EXPORT_SYMBOL_GPL(soc_device_match);
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