1*36ac0228SMichael Walle // SPDX-License-Identifier: GPL-2.0 2*36ac0228SMichael Walle 3*36ac0228SMichael Walle #include <linux/mtd/spi-nor.h> 4*36ac0228SMichael Walle #include <linux/spi/spi.h> 5*36ac0228SMichael Walle #include <linux/spi/spi-mem.h> 6*36ac0228SMichael Walle #include <linux/sysfs.h> 7*36ac0228SMichael Walle 8*36ac0228SMichael Walle #include "core.h" 9*36ac0228SMichael Walle 10*36ac0228SMichael Walle static ssize_t manufacturer_show(struct device *dev, 11*36ac0228SMichael Walle struct device_attribute *attr, char *buf) 12*36ac0228SMichael Walle { 13*36ac0228SMichael Walle struct spi_device *spi = to_spi_device(dev); 14*36ac0228SMichael Walle struct spi_mem *spimem = spi_get_drvdata(spi); 15*36ac0228SMichael Walle struct spi_nor *nor = spi_mem_get_drvdata(spimem); 16*36ac0228SMichael Walle 17*36ac0228SMichael Walle return sysfs_emit(buf, "%s\n", nor->manufacturer->name); 18*36ac0228SMichael Walle } 19*36ac0228SMichael Walle static DEVICE_ATTR_RO(manufacturer); 20*36ac0228SMichael Walle 21*36ac0228SMichael Walle static ssize_t partname_show(struct device *dev, 22*36ac0228SMichael Walle struct device_attribute *attr, char *buf) 23*36ac0228SMichael Walle { 24*36ac0228SMichael Walle struct spi_device *spi = to_spi_device(dev); 25*36ac0228SMichael Walle struct spi_mem *spimem = spi_get_drvdata(spi); 26*36ac0228SMichael Walle struct spi_nor *nor = spi_mem_get_drvdata(spimem); 27*36ac0228SMichael Walle 28*36ac0228SMichael Walle return sysfs_emit(buf, "%s\n", nor->info->name); 29*36ac0228SMichael Walle } 30*36ac0228SMichael Walle static DEVICE_ATTR_RO(partname); 31*36ac0228SMichael Walle 32*36ac0228SMichael Walle static ssize_t jedec_id_show(struct device *dev, 33*36ac0228SMichael Walle struct device_attribute *attr, char *buf) 34*36ac0228SMichael Walle { 35*36ac0228SMichael Walle struct spi_device *spi = to_spi_device(dev); 36*36ac0228SMichael Walle struct spi_mem *spimem = spi_get_drvdata(spi); 37*36ac0228SMichael Walle struct spi_nor *nor = spi_mem_get_drvdata(spimem); 38*36ac0228SMichael Walle 39*36ac0228SMichael Walle return sysfs_emit(buf, "%*phN\n", nor->info->id_len, nor->info->id); 40*36ac0228SMichael Walle } 41*36ac0228SMichael Walle static DEVICE_ATTR_RO(jedec_id); 42*36ac0228SMichael Walle 43*36ac0228SMichael Walle static struct attribute *spi_nor_sysfs_entries[] = { 44*36ac0228SMichael Walle &dev_attr_manufacturer.attr, 45*36ac0228SMichael Walle &dev_attr_partname.attr, 46*36ac0228SMichael Walle &dev_attr_jedec_id.attr, 47*36ac0228SMichael Walle NULL 48*36ac0228SMichael Walle }; 49*36ac0228SMichael Walle 50*36ac0228SMichael Walle static ssize_t sfdp_read(struct file *filp, struct kobject *kobj, 51*36ac0228SMichael Walle struct bin_attribute *bin_attr, char *buf, 52*36ac0228SMichael Walle loff_t off, size_t count) 53*36ac0228SMichael Walle { 54*36ac0228SMichael Walle struct spi_device *spi = to_spi_device(kobj_to_dev(kobj)); 55*36ac0228SMichael Walle struct spi_mem *spimem = spi_get_drvdata(spi); 56*36ac0228SMichael Walle struct spi_nor *nor = spi_mem_get_drvdata(spimem); 57*36ac0228SMichael Walle struct sfdp *sfdp = nor->sfdp; 58*36ac0228SMichael Walle size_t sfdp_size = sfdp->num_dwords * sizeof(*sfdp->dwords); 59*36ac0228SMichael Walle 60*36ac0228SMichael Walle return memory_read_from_buffer(buf, count, &off, nor->sfdp->dwords, 61*36ac0228SMichael Walle sfdp_size); 62*36ac0228SMichael Walle } 63*36ac0228SMichael Walle static BIN_ATTR_RO(sfdp, 0); 64*36ac0228SMichael Walle 65*36ac0228SMichael Walle static struct bin_attribute *spi_nor_sysfs_bin_entries[] = { 66*36ac0228SMichael Walle &bin_attr_sfdp, 67*36ac0228SMichael Walle NULL 68*36ac0228SMichael Walle }; 69*36ac0228SMichael Walle 70*36ac0228SMichael Walle static umode_t spi_nor_sysfs_is_bin_visible(struct kobject *kobj, 71*36ac0228SMichael Walle struct bin_attribute *attr, int n) 72*36ac0228SMichael Walle { 73*36ac0228SMichael Walle struct spi_device *spi = to_spi_device(kobj_to_dev(kobj)); 74*36ac0228SMichael Walle struct spi_mem *spimem = spi_get_drvdata(spi); 75*36ac0228SMichael Walle struct spi_nor *nor = spi_mem_get_drvdata(spimem); 76*36ac0228SMichael Walle 77*36ac0228SMichael Walle if (attr == &bin_attr_sfdp && nor->sfdp) 78*36ac0228SMichael Walle return 0444; 79*36ac0228SMichael Walle 80*36ac0228SMichael Walle return 0; 81*36ac0228SMichael Walle } 82*36ac0228SMichael Walle 83*36ac0228SMichael Walle static const struct attribute_group spi_nor_sysfs_group = { 84*36ac0228SMichael Walle .name = "spi-nor", 85*36ac0228SMichael Walle .is_bin_visible = spi_nor_sysfs_is_bin_visible, 86*36ac0228SMichael Walle .attrs = spi_nor_sysfs_entries, 87*36ac0228SMichael Walle .bin_attrs = spi_nor_sysfs_bin_entries, 88*36ac0228SMichael Walle }; 89*36ac0228SMichael Walle 90*36ac0228SMichael Walle const struct attribute_group *spi_nor_sysfs_groups[] = { 91*36ac0228SMichael Walle &spi_nor_sysfs_group, 92*36ac0228SMichael Walle NULL 93*36ac0228SMichael Walle }; 94