1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/kernel.h> 3 #include <linux/stat.h> 4 #include <asm/macio.h> 5 6 static ssize_t 7 compatible_show (struct device *dev, struct device_attribute *attr, char *buf) 8 { 9 struct platform_device *of; 10 const char *compat; 11 int cplen; 12 int length = 0; 13 14 of = &to_macio_device (dev)->ofdev; 15 compat = of_get_property(of->dev.of_node, "compatible", &cplen); 16 if (!compat) { 17 *buf = '\0'; 18 return 0; 19 } 20 while (cplen > 0) { 21 int l; 22 length += sprintf (buf, "%s\n", compat); 23 buf += length; 24 l = strlen (compat) + 1; 25 compat += l; 26 cplen -= l; 27 } 28 29 return length; 30 } 31 static DEVICE_ATTR_RO(compatible); 32 33 static ssize_t modalias_show (struct device *dev, struct device_attribute *attr, 34 char *buf) 35 { 36 return of_device_modalias(dev, buf, PAGE_SIZE); 37 } 38 39 static ssize_t devspec_show(struct device *dev, 40 struct device_attribute *attr, char *buf) 41 { 42 struct platform_device *ofdev; 43 44 ofdev = to_platform_device(dev); 45 return sprintf(buf, "%pOF\n", ofdev->dev.of_node); 46 } 47 static DEVICE_ATTR_RO(modalias); 48 static DEVICE_ATTR_RO(devspec); 49 50 static ssize_t name_show(struct device *dev, 51 struct device_attribute *attr, char *buf) 52 { 53 return sprintf(buf, "%pOFn\n", dev->of_node); 54 } 55 static DEVICE_ATTR_RO(name); 56 57 static ssize_t type_show(struct device *dev, 58 struct device_attribute *attr, char *buf) 59 { 60 return sprintf(buf, "%s\n", of_node_get_device_type(dev->of_node)); 61 } 62 static DEVICE_ATTR_RO(type); 63 64 static struct attribute *macio_dev_attrs[] = { 65 &dev_attr_name.attr, 66 &dev_attr_type.attr, 67 &dev_attr_compatible.attr, 68 &dev_attr_modalias.attr, 69 &dev_attr_devspec.attr, 70 NULL, 71 }; 72 73 static const struct attribute_group macio_dev_group = { 74 .attrs = macio_dev_attrs, 75 }; 76 77 const struct attribute_group *macio_dev_groups[] = { 78 &macio_dev_group, 79 NULL, 80 }; 81