1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/kernel.h> 3 #include <linux/of.h> 4 #include <linux/of_device.h> 5 #include <linux/stat.h> 6 #include <asm/macio.h> 7 8 static ssize_t 9 compatible_show (struct device *dev, struct device_attribute *attr, char *buf) 10 { 11 struct platform_device *of; 12 const char *compat; 13 int cplen; 14 int length = 0; 15 16 of = &to_macio_device (dev)->ofdev; 17 compat = of_get_property(of->dev.of_node, "compatible", &cplen); 18 if (!compat) { 19 *buf = '\0'; 20 return 0; 21 } 22 while (cplen > 0) { 23 int l; 24 length += sprintf (buf, "%s\n", compat); 25 buf += length; 26 l = strlen (compat) + 1; 27 compat += l; 28 cplen -= l; 29 } 30 31 return length; 32 } 33 static DEVICE_ATTR_RO(compatible); 34 35 static ssize_t modalias_show (struct device *dev, struct device_attribute *attr, 36 char *buf) 37 { 38 return of_device_modalias(dev, buf, PAGE_SIZE); 39 } 40 41 static ssize_t devspec_show(struct device *dev, 42 struct device_attribute *attr, char *buf) 43 { 44 struct platform_device *ofdev; 45 46 ofdev = to_platform_device(dev); 47 return sprintf(buf, "%pOF\n", ofdev->dev.of_node); 48 } 49 static DEVICE_ATTR_RO(modalias); 50 static DEVICE_ATTR_RO(devspec); 51 52 static ssize_t name_show(struct device *dev, 53 struct device_attribute *attr, char *buf) 54 { 55 return sprintf(buf, "%pOFn\n", dev->of_node); 56 } 57 static DEVICE_ATTR_RO(name); 58 59 static ssize_t type_show(struct device *dev, 60 struct device_attribute *attr, char *buf) 61 { 62 return sprintf(buf, "%s\n", of_node_get_device_type(dev->of_node)); 63 } 64 static DEVICE_ATTR_RO(type); 65 66 static struct attribute *macio_dev_attrs[] = { 67 &dev_attr_name.attr, 68 &dev_attr_type.attr, 69 &dev_attr_compatible.attr, 70 &dev_attr_modalias.attr, 71 &dev_attr_devspec.attr, 72 NULL, 73 }; 74 75 static const struct attribute_group macio_dev_group = { 76 .attrs = macio_dev_attrs, 77 }; 78 79 const struct attribute_group *macio_dev_groups[] = { 80 &macio_dev_group, 81 NULL, 82 }; 83