diff options
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/thinkpad_acpi.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index 6b9300779a43..1dcf0660d8b5 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -5983,6 +5983,52 @@ static void fan_exit(void) flush_workqueue(tpacpi_wq); } +static void fan_suspend(pm_message_t state) +{ + if (!fan_control_allowed) + return; + + /* Store fan status in cache */ + fan_get_status_safe(NULL); + if (tp_features.fan_ctrl_status_undef) + fan_control_desired_level = TP_EC_FAN_AUTO; +} + +static void fan_resume(void) +{ + u8 saved_fan_level; + u8 current_level = 7; + bool do_set = false; + + /* DSDT *always* updates status on resume */ + tp_features.fan_ctrl_status_undef = 0; + + saved_fan_level = fan_control_desired_level; + if (!fan_control_allowed || + (fan_get_status_safe(¤t_level) < 0)) + return; + + switch (fan_control_access_mode) { + case TPACPI_FAN_WR_ACPI_SFAN: + do_set = (saved_fan_level > current_level); + break; + case TPACPI_FAN_WR_ACPI_FANS: + case TPACPI_FAN_WR_TPEC: + do_set = ((saved_fan_level & TP_EC_FAN_FULLSPEED) || + (saved_fan_level == 7 && + !(current_level & TP_EC_FAN_FULLSPEED))); + break; + default: + return; + } + if (do_set) { + printk(TPACPI_NOTICE + "restoring fan level to 0x%02x\n", + saved_fan_level); + fan_set_level_safe(saved_fan_level); + } +} + static int fan_read(char *p) { int len = 0; @@ -6174,6 +6220,8 @@ static struct ibm_struct fan_driver_data = { .read = fan_read, .write = fan_write, .exit = fan_exit, + .suspend = fan_suspend, + .resume = fan_resume, }; /**************************************************************************** |