ACPI: thinkpad-acpi: add sysfs support to the cmos command subdriver
Add sysfs attributes to send ThinkPad CMOS commands.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 79abc68..ba749df 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -1743,8 +1743,30 @@
* CMOS subdriver
*/
+/* sysfs cmos_command -------------------------------------------------- */
+static ssize_t cmos_command_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ unsigned long cmos_cmd;
+ int res;
+
+ if (parse_strtoul(buf, 21, &cmos_cmd))
+ return -EINVAL;
+
+ res = issue_thinkpad_cmos_command(cmos_cmd);
+ return (res)? res : count;
+}
+
+static struct device_attribute dev_attr_cmos_command =
+ __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
+
+/* --------------------------------------------------------------------- */
+
static int __init cmos_init(struct ibm_init_struct *iibm)
{
+ int res;
+
vdbg_printk(TPACPI_DBG_INIT,
"initializing cmos commands subdriver\n");
@@ -1752,9 +1774,19 @@
vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
str_supported(cmos_handle != NULL));
+
+ res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
+ if (res)
+ return res;
+
return (cmos_handle)? 0 : 1;
}
+static void cmos_exit(void)
+{
+ device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
+}
+
static int cmos_read(char *p)
{
int len = 0;
@@ -1795,6 +1827,7 @@
.name = "cmos",
.read = cmos_read,
.write = cmos_write,
+ .exit = cmos_exit,
};
/*************************************************************************