sdio: add basic sysfs attributes

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 32 insertions, 0 deletions

diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index c834f5150888..129f0719c391 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -23,6 +23,37 @@
 #define dev_to_sdio_func(d)     container_of(d, struct sdio_func, dev)
 #define to_sdio_driver(d)      container_of(d, struct sdio_driver, drv)
 
+/* show configuration fields */
+#define sdio_config_attr(field, format_string)                          \
+static ssize_t                                                          \
+field##_show(struct device *dev, struct device_attribute *attr, char *buf)                              \
+{                                                                       \
+        struct sdio_func *func;                                         \
+                                                                        \
+        func = dev_to_sdio_func (dev);                                  \
+        return sprintf (buf, format_string, func->field);               \
+}
+
+sdio_config_attr(class, "0x%02x\n");
+sdio_config_attr(vendor, "0x%04x\n");
+sdio_config_attr(device, "0x%04x\n");
+
+static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+        struct sdio_func *func = dev_to_sdio_func (dev);
+
+        return sprintf(buf, "sdio:c%02Xv%04Xd%04X\n",
+                        func->class, func->vendor, func->device);
+}
+
+struct device_attribute sdio_dev_attrs[] = {
+        __ATTR_RO(class),
+        __ATTR_RO(vendor),
+        __ATTR_RO(device),
+        __ATTR_RO(modalias),
+        __ATTR_NULL,
+};
+
 static const struct sdio_device_id *sdio_match_one(struct sdio_func *func,
         const struct sdio_device_id *id)
 {
@@ -117,6 +148,7 @@ static int sdio_bus_remove(struct device *dev)
 
 static struct bus_type sdio_bus_type = {
         .name           = "sdio",
+        .dev_attrs      = sdio_dev_attrs,
         .match          = sdio_bus_match,
         .uevent         = sdio_bus_uevent,
         .probe          = sdio_bus_probe,