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(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 }; 83