cxl: Add ability to reset the card

[deliverable/linux.git] / drivers / misc / cxl / sysfs.c

diff --git a/drivers/misc/cxl/sysfs.c b/drivers/misc/cxl/sysfs.c
index ed4ad461143c1a160d05e95da9f6e2fc4aff4cab..adf1f6d849131eefaf6f7520651dd780800cd326 100644 (file)
--- a/drivers/misc/cxl/sysfs.c
+++ b/drivers/misc/cxl/sysfs.c
@@ -56,6 +56,23 @@ static ssize_t image_loaded_show(struct device *device,
        return scnprintf(buf, PAGE_SIZE, "factory\n");
 }
 
+static ssize_t reset_adapter_store(struct device *device,
+                                  struct device_attribute *attr,
+                                  const char *buf, size_t count)
+{
+       struct cxl *adapter = to_cxl_adapter(device);
+       int rc;
+       int val;
+
+       rc = sscanf(buf, "%i", &val);
+       if ((rc != 1) || (val != 1))
+               return -EINVAL;
+
+       if ((rc = cxl_reset(adapter)))
+               return rc;
+       return count;
+}
+
 static ssize_t load_image_on_perst_show(struct device *device,
                                 struct device_attribute *attr,
                                 char *buf)
@@ -100,6 +117,7 @@ static struct device_attribute adapter_attrs[] = {
        __ATTR_RO(base_image),
        __ATTR_RO(image_loaded),
        __ATTR_RW(load_image_on_perst),
+       __ATTR(reset, S_IWUSR, NULL, reset_adapter_store),
 };