1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/kernel.h> 3 #include <linux/stat.h> 4 #include <asm/macio.h> 5 6 7 #define macio_config_of_attr(field, format_string) \ 8 static ssize_t \ 9 field##_show (struct device *dev, struct device_attribute *attr, \ 10 char *buf) \ 11 { \ 12 struct macio_dev *mdev = to_macio_device (dev); \ 13 return sprintf (buf, format_string, mdev->ofdev.dev.of_node->field); \ 14 } \ 15 static DEVICE_ATTR_RO(field); 16 17 static ssize_t 18 compatible_show (struct device *dev, struct device_attribute *attr, char *buf) 19 { 20 struct platform_device *of; 21 const char *compat; 22 int cplen; 23 int length = 0; 24 25 of = &to_macio_device (dev)->ofdev; 26 compat = of_get_property(of->dev.of_node, "compatible", &cplen); 27 if (!compat) { 28 *buf = '\0'; 29 return 0; 30 } 31 while (cplen > 0) { 32 int l; 33 length += sprintf (buf, "%s\n", compat); 34 buf += length; 35 l = strlen (compat) + 1; 36 compat += l; 37 cplen -= l; 38 } 39 40 return length; 41 } 42 static DEVICE_ATTR_RO(compatible); 43 44 static ssize_t modalias_show (struct device *dev, struct device_attribute *attr, 45 char *buf) 46 { 47 return of_device_modalias(dev, buf, PAGE_SIZE); 48 } 49 50 static ssize_t devspec_show(struct device *dev, 51 struct device_attribute *attr, char *buf) 52 { 53 struct platform_device *ofdev; 54 55 ofdev = to_platform_device(dev); 56 return sprintf(buf, "%pOF\n", ofdev->dev.of_node); 57 } 58 static DEVICE_ATTR_RO(modalias); 59 static DEVICE_ATTR_RO(devspec); 60 61 macio_config_of_attr (name, "%s\n"); 62 macio_config_of_attr (type, "%s\n"); 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