drivers/peci/sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 // Copyright (c) 2021 Intel Corporation
   3
   4 #include <linux/device.h>
   5 #include <linux/kernel.h>
   6 #include <linux/peci.h>
   7
   8 #include "internal.h"
   9
  10 static int rescan_controller(struct device *dev, void *data)
  11 {
  12         if (dev->type != &peci_controller_type)
  13                 return 0;
  14
  15         return peci_controller_scan_devices(to_peci_controller(dev));
  16 }
  17
  18 static ssize_t rescan_store(const struct bus_type *bus, const char *buf, size_t count)
  19 {
  20         bool res;
  21         int ret;
  22
  23         ret = kstrtobool(buf, &res);
  24         if (ret)
  25                 return ret;
  26
  27         if (!res)
  28                 return count;
  29
  30         ret = bus_for_each_dev(&peci_bus_type, NULL, NULL, rescan_controller);
  31         if (ret)
  32                 return ret;
  33
  34         return count;
  35 }
  36 static BUS_ATTR_WO(rescan);
  37
  38 static struct attribute *peci_bus_attrs[] = {
  39         &bus_attr_rescan.attr,
  40         NULL
  41 };
  42
  43 static const struct attribute_group peci_bus_group = {
  44         .attrs = peci_bus_attrs,
  45 };
  46
  47 const struct attribute_group *peci_bus_groups[] = {
  48         &peci_bus_group,
  49         NULL
  50 };
  51
  52 static ssize_t remove_store(struct device *dev, struct device_attribute *attr,
  53                             const char *buf, size_t count)
  54 {
  55         struct peci_device *device = to_peci_device(dev);
  56         bool res;
  57         int ret;
  58
  59         ret = kstrtobool(buf, &res);
  60         if (ret)
  61                 return ret;
  62
  63         if (res && device_remove_file_self(dev, attr))
  64                 peci_device_destroy(device);
  65
  66         return count;
  67 }
  68 static DEVICE_ATTR_IGNORE_LOCKDEP(remove, 0200, NULL, remove_store);
  69
  70 static struct attribute *peci_device_attrs[] = {
  71         &dev_attr_remove.attr,
  72         NULL
  73 };
  74
  75 static const struct attribute_group peci_device_group = {
  76         .attrs = peci_device_attrs,
  77 };
  78
  79 const struct attribute_group *peci_device_groups[] = {
  80         &peci_device_group,
  81         NULL
  82 };