ACPI: thinkpad-acpi: add sysfs support to hotkey subdriver

[linux-drm-fsl-dcu.git] / drivers / misc / thinkpad_acpi.c

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index a56526500c1895d4d689119196634b342de2c047..83a8d984e709c3d54461f4180c4f5a5400b57149 100644 (file)
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -706,6 +706,108 @@ static struct ibm_struct thinkpad_acpi_driver_data = {
 static int hotkey_orig_status;
 static int hotkey_orig_mask;
 
+static struct attribute_set *hotkey_dev_attributes = NULL;
+
+/* sysfs hotkey enable ------------------------------------------------- */
+static ssize_t hotkey_enable_show(struct device *dev,
+                          struct device_attribute *attr,
+                          char *buf)
+{
+       int res, status, mask;
+
+       res = hotkey_get(&status, &mask);
+       if (res)
+               return res;
+
+       return snprintf(buf, PAGE_SIZE, "%d\n", status);
+}
+
+static ssize_t hotkey_enable_store(struct device *dev,
+                           struct device_attribute *attr,
+                           const char *buf, size_t count)
+{
+       unsigned long t;
+       int res, status, mask;
+
+       if (parse_strtoul(buf, 1, &t))
+               return -EINVAL;
+
+       res = hotkey_get(&status, &mask);
+       if (!res)
+               res = hotkey_set(t, mask);
+
+       return (res) ? res : count;
+}
+
+static struct device_attribute dev_attr_hotkey_enable =
+       __ATTR(enable, S_IWUSR | S_IRUGO,
+               hotkey_enable_show, hotkey_enable_store);
+
+/* sysfs hotkey mask --------------------------------------------------- */
+static ssize_t hotkey_mask_show(struct device *dev,
+                          struct device_attribute *attr,
+                          char *buf)
+{
+       int res, status, mask;
+
+       res = hotkey_get(&status, &mask);
+       if (res)
+               return res;
+
+       return snprintf(buf, PAGE_SIZE, "0x%04x\n", mask);
+}
+
+static ssize_t hotkey_mask_store(struct device *dev,
+                           struct device_attribute *attr,
+                           const char *buf, size_t count)
+{
+       unsigned long t;
+       int res, status, mask;
+
+       if (parse_strtoul(buf, 0xffff, &t))
+               return -EINVAL;
+
+       res = hotkey_get(&status, &mask);
+       if (!res)
+               hotkey_set(status, t);
+
+       return (res) ? res : count;
+}
+
+static struct device_attribute dev_attr_hotkey_mask =
+       __ATTR(mask, S_IWUSR | S_IRUGO,
+               hotkey_mask_show, hotkey_mask_store);
+
+/* sysfs hotkey bios_enabled ------------------------------------------- */
+static ssize_t hotkey_bios_enabled_show(struct device *dev,
+                          struct device_attribute *attr,
+                          char *buf)
+{
+       return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
+}
+
+static struct device_attribute dev_attr_hotkey_bios_enabled =
+       __ATTR(bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
+
+/* sysfs hotkey bios_mask ---------------------------------------------- */
+static ssize_t hotkey_bios_mask_show(struct device *dev,
+                          struct device_attribute *attr,
+                          char *buf)
+{
+       return snprintf(buf, PAGE_SIZE, "0x%04x\n", hotkey_orig_mask);
+}
+
+static struct device_attribute dev_attr_hotkey_bios_mask =
+       __ATTR(bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
+
+/* --------------------------------------------------------------------- */
+
+static struct attribute *hotkey_mask_attributes[] = {
+       &dev_attr_hotkey_mask.attr,
+       &dev_attr_hotkey_bios_enabled.attr,
+       &dev_attr_hotkey_bios_mask.attr,
+};
+
 static int __init hotkey_init(struct ibm_init_struct *iibm)
 {
        int res;
@@ -722,6 +824,15 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
                str_supported(tp_features.hotkey));
 
        if (tp_features.hotkey) {
+               hotkey_dev_attributes = create_attr_set(4,
+                                               TPACPI_HOTKEY_SYSFS_GROUP);
+               if (!hotkey_dev_attributes)
+                       return -ENOMEM;
+               res = add_to_attr_set(hotkey_dev_attributes,
+                               &dev_attr_hotkey_enable.attr);
+               if (res)
+                       return res;
+
                /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
                   A30, R30, R31, T20-22, X20-21, X22-24 */
                tp_features.hotkey_mask =
@@ -731,6 +842,16 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
                        str_supported(tp_features.hotkey_mask));
 
                res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
+               if (!res && tp_features.hotkey_mask) {
+                       res = add_many_to_attr_set(hotkey_dev_attributes,
+                               hotkey_mask_attributes,
+                               ARRAY_SIZE(hotkey_mask_attributes));
+               }
+               if (!res)
+                       res = register_attr_set_with_sysfs(
+                                       hotkey_dev_attributes,
+                                       &tpacpi_pdev->dev.kobj);
+
                if (res)
                        return res;
        }
@@ -748,6 +869,11 @@ static void hotkey_exit(void)
                if (res)
                        printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
        }
+
+       if (hotkey_dev_attributes) {
+               delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
+               hotkey_dev_attributes = NULL;
+       }
 }
 
 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
@@ -798,6 +924,7 @@ static int hotkey_set(int status, int mask)
        return 0;
 }
 
+/* procfs -------------------------------------------------------------- */
 static int hotkey_read(char *p)
 {
        int res, status, mask;