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ACPI: thinkpad-acpi: add sysfs support to the cmos command subdriver

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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>
This commit is contained in:
Henrique de Moraes Holschuh
2007-04-24 11:48:19 -03:00
committed by Len Brown
parent eaa7571b2d
commit b616004c70
2 changed files with 44 additions and 12 deletions
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33
drivers/misc/thinkpad_acpi.c
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@@ -1743,8 +1743,30 @@ static struct ibm_struct bay_driver_data = {
* 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 @@ static int __init cmos_init(struct ibm_init_struct *iibm)
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 @@ static struct ibm_struct cmos_driver_data = {
.name = "cmos",
.read = cmos_read,
.write = cmos_write,
.exit = cmos_exit,
};
/*************************************************************************