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sony-laptop: add thermal profiles support 

[malattia@linux.it: support string based profiles names]

Signed-off-by: Marco Chiappero <marco@absence.it>
Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
Marco Chiappero 2012-05-19 22:35:51 +09:00 committed by Matthew Garrett
parent 967145a030
commit 49f000adca
1 changed files with 183 additions and 0 deletions
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183
drivers/platform/x86/sony-laptop.c
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@ -148,6 +148,10 @@ static int sony_nc_battery_care_setup(struct platform_device *pd,
unsigned int handle);
static void sony_nc_battery_care_cleanup(struct platform_device *pd);
static int sony_nc_thermal_setup(struct platform_device *pd);
static void sony_nc_thermal_cleanup(struct platform_device *pd);
static void sony_nc_thermal_resume(void);
enum sony_nc_rfkill {
SONY_WIFI,
SONY_BLUETOOTH,
@ -1282,6 +1286,12 @@ static void sony_nc_function_setup(struct acpi_device *device,
pr_err("couldn't set up battery care function (%d)\n",
result);
break;
case 0x0122:
result = sony_nc_thermal_setup(pf_device);
if (result)
pr_err("couldn't set up thermal profile function (%d)\n",
result);
break;
case 0x0124:
case 0x0135:
sony_nc_rfkill_setup(device);
@ -1323,6 +1333,9 @@ static void sony_nc_function_cleanup(struct platform_device *pd)
case 0x013f:
sony_nc_battery_care_cleanup(pd);
break;
case 0x0122:
sony_nc_thermal_cleanup(pd);
break;
case 0x0124:
case 0x0135:
sony_nc_rfkill_cleanup();
@ -1362,6 +1375,9 @@ static void sony_nc_function_resume(void)
/* re-enable hotkeys */
sony_call_snc_handle(handle, 0x100, &result);
break;
case 0x0122:
sony_nc_thermal_resume();
break;
case 0x0124:
case 0x0135:
sony_nc_rfkill_update();
@ -1923,6 +1939,173 @@ static void sony_nc_battery_care_cleanup(struct platform_device *pd)
}
}
struct snc_thermal_ctrl {
unsigned int mode;
unsigned int profiles;
struct device_attribute mode_attr;
struct device_attribute profiles_attr;
};
static struct snc_thermal_ctrl *th_handle;
#define THM_PROFILE_MAX 3
static const char * const snc_thermal_profiles[] = {
"balanced",
"silent",
"performance"
};
static int sony_nc_thermal_mode_set(unsigned short mode)
{
unsigned int result;
/* the thermal profile seems to be a two bit bitmask:
* lsb -> silent
* msb -> performance
* no bit set is the normal operation and is always valid
* Some vaio models only have "balanced" and "performance"
*/
if ((mode && !(th_handle->profiles & mode)) || mode >= THM_PROFILE_MAX)
return -EINVAL;
if (sony_call_snc_handle(0x0122, mode << 0x10 | 0x0200, &result))
return -EIO;
th_handle->mode = mode;
return 0;
}
static int sony_nc_thermal_mode_get(void)
{
unsigned int result;
if (sony_call_snc_handle(0x0122, 0x0100, &result))
return -EIO;
return result & 0xff;
}
static ssize_t sony_nc_thermal_profiles_show(struct device *dev,
struct device_attribute *attr, char *buffer)
{
short cnt;
size_t idx = 0;
for (cnt = 0; cnt < THM_PROFILE_MAX; cnt++) {
if (!cnt || (th_handle->profiles & cnt))
idx += snprintf(buffer + idx, PAGE_SIZE - idx, "%s ",
snc_thermal_profiles[cnt]);
}
idx += snprintf(buffer + idx, PAGE_SIZE - idx, "\n");
return idx;
}
static ssize_t sony_nc_thermal_mode_store(struct device *dev,
struct device_attribute *attr,
const char *buffer, size_t count)
{
unsigned short cmd;
size_t len = count;
if (count == 0)
return -EINVAL;
/* skip the newline if present */
if (buffer[len - 1] == '\n')
len--;
for (cmd = 0; cmd < THM_PROFILE_MAX; cmd++)
if (strncmp(buffer, snc_thermal_profiles[cmd], len) == 0)
break;
if (sony_nc_thermal_mode_set(cmd))
return -EIO;
return count;
}
static ssize_t sony_nc_thermal_mode_show(struct device *dev,
struct device_attribute *attr, char *buffer)
{
ssize_t count = 0;
unsigned int mode = sony_nc_thermal_mode_get();
if (mode < 0)
return mode;
count = snprintf(buffer, PAGE_SIZE, "%s\n", snc_thermal_profiles[mode]);
return count;
}
static int sony_nc_thermal_setup(struct platform_device *pd)
{
int ret = 0;
th_handle = kzalloc(sizeof(struct snc_thermal_ctrl), GFP_KERNEL);
if (!th_handle)
return -ENOMEM;
ret = sony_call_snc_handle(0x0122, 0x0000, &th_handle->profiles);
if (ret) {
pr_warn("couldn't to read the thermal profiles\n");
goto outkzalloc;
}
ret = sony_nc_thermal_mode_get();
if (ret < 0) {
pr_warn("couldn't to read the current thermal profile");
goto outkzalloc;
}
th_handle->mode = ret;
sysfs_attr_init(&th_handle->profiles_attr.attr);
th_handle->profiles_attr.attr.name = "thermal_profiles";
th_handle->profiles_attr.attr.mode = S_IRUGO;
th_handle->profiles_attr.show = sony_nc_thermal_profiles_show;
sysfs_attr_init(&th_handle->mode_attr.attr);
th_handle->mode_attr.attr.name = "thermal_control";
th_handle->mode_attr.attr.mode = S_IRUGO | S_IWUSR;
th_handle->mode_attr.show = sony_nc_thermal_mode_show;
th_handle->mode_attr.store = sony_nc_thermal_mode_store;
ret = device_create_file(&pd->dev, &th_handle->profiles_attr);
if (ret)
goto outkzalloc;
ret = device_create_file(&pd->dev, &th_handle->mode_attr);
if (ret)
goto outprofiles;
return 0;
outprofiles:
device_remove_file(&pd->dev, &th_handle->profiles_attr);
outkzalloc:
kfree(th_handle);
th_handle = NULL;
return ret;
}
static void sony_nc_thermal_cleanup(struct platform_device *pd)
{
if (th_handle) {
device_remove_file(&pd->dev, &th_handle->profiles_attr);
device_remove_file(&pd->dev, &th_handle->mode_attr);
kfree(th_handle);
th_handle = NULL;
}
}
static void sony_nc_thermal_resume(void)
{
unsigned int status = sony_nc_thermal_mode_get();
if (status != th_handle->mode)
sony_nc_thermal_mode_set(th_handle->mode);
}
static void sony_nc_backlight_ng_read_limits(int handle,
struct sony_backlight_props *props)
{