This feature is present on many Vaio notebooks and allows to choose
between different thermal profiles (performance, silent, balanced)
depending on the notebook capability.
Signed-off-by: Marco Chiappero <marco@xxxxxxxxxx>
---
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -1748,6 +1748,166 @@ static int sony_nc_battery_care_cleanup(
return 0;
}
+struct thermal_ctrl {
+ unsigned int mode;
+ unsigned int profiles;
+ struct device_attribute mode_attr;
+ struct device_attribute profiles_attr;
+};
+static struct thermal_ctrl *th_handle;
+
+static int sony_nc_thermal_mode_set(unsigned int profile)
+{
+ unsigned int cmd, result;
+
+ /* to avoid the 1 value hole when only 2 profiles are available */
+ switch (profile) {
+ case 1: /* performance */
+ cmd = 2;
+ break;
+ case 2: /* silent */
+ cmd = 1;
+ break;
+ default: /* balanced */
+ cmd = 0;
+ break;
+ }
+
+ if (sony_call_snc_handle(0x0122, cmd << 0x10 | 0x0200, &result))
+ return -EIO;
+
+ th_handle->mode = profile;
+
+ return 0;
+}
+
+static int sony_nc_thermal_mode_get(unsigned int *profile)
+{
+ unsigned int result;
+
+ if (sony_call_snc_handle(0x0122, 0x0100, &result))
+ return -EIO;
+
+ /* to avoid the 1 value hole when only 2 profiles are available */
+ switch (result & 0xff) {
+ case 2: /* performance */
+ *profile = 1;
+ break;
+ case 1: /* silent */
+ *profile = 2;
+ break;
+ default: /* balanced */
+ *profile = 0;
+ break;
+ }
+
+ return 0;
+}
+
+static ssize_t sony_nc_thermal_profiles_show(struct device *dev,
+ struct device_attribute *attr, char *buffer)
+{
+ return snprintf(buffer, PAGE_SIZE, "%u\n", th_handle->profiles);
+}
+
+static ssize_t sony_nc_thermal_mode_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buffer, size_t count)
+{
+ unsigned long value;
+
+ if (count > 31)
+ return -EINVAL;
+ if (strict_strtoul(buffer, 10, &value) ||
+ value > (th_handle->profiles - 1))
+ return -EINVAL;
+
+ if (sony_nc_thermal_mode_set(value))
+ 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 profile;
+
+ if (sony_nc_thermal_mode_get(&profile))
+ return -EIO;
+
+ count = snprintf(buffer, PAGE_SIZE, "%d\n", profile);
+
+ return count;
+}
+
+static int sony_nc_thermal_setup(struct platform_device *pd)
+{
+ th_handle = kzalloc(sizeof(struct thermal_ctrl), GFP_KERNEL);
+ if (!th_handle)
+ return -ENOMEM;
+
+ if (sony_call_snc_handle(0x0122, 0x0000, &th_handle->profiles)) {
+ pr_warn("unable to retrieve the available profiles\n");
+ goto outkzalloc;
+ }
+
+ if (sony_nc_thermal_mode_get(&th_handle->mode)) {
+ pr_warn("unable to retrieve the current profile");
+ goto outkzalloc;
+ }
+
+ 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;
+
+ if (device_create_file(&pd->dev, &th_handle->profiles_attr))
+ goto outkzalloc;
+
+ if (device_create_file(&pd->dev, &th_handle->mode_attr))
+ goto outprofiles;
+
+ return 0;
+
+outprofiles:
+ device_remove_file(&pd->dev, &th_handle->profiles_attr);
+outkzalloc:
+ kfree(th_handle);
+ th_handle = NULL;
+ return -1;
+}
+
+static int 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;
+ }
+
+ return 0;
+}
+
+static void sony_nc_thermal_resume(void)
+{
+ unsigned int status;
+
+ sony_nc_thermal_mode_get(&status);
+
+ 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)
{
@@ -1889,6 +2049,9 @@ static void sony_nc_snc_setup_handles(st
sony_bc_handle = handle;
ret = sony_nc_battery_care_setup(pd);
break;
+ case 0x0122:
+ ret = sony_nc_thermal_setup(pd);
+ break;
case 0x0137:
case 0x0143:
sony_kbd_handle = handle;
@@ -1931,6 +2094,9 @@ static void sony_nc_snc_cleanup_handles(
case 0x013f:
sony_nc_battery_care_cleanup(pd);
break;
+ case 0x0122:
+ sony_nc_thermal_cleanup(pd);
+ break;
case 0x0137:
case 0x0143:
sony_nc_kbd_backlight_cleanup(pd);
@@ -2031,6 +2197,9 @@ static int sony_nc_snc_resume(void)
case 0x0102:
sony_nc_function_setup(handle);
break;
+ case 0x0122:
+ sony_nc_thermal_resume();
+ break;
case 0x0124:
case 0x0135:
/* re-read rfkill state */
--
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