HID: intel-thc-hid: Intel-quickspi: Improve power management for touch devices

Enhance power management with two key improvements:
1. Hibernate support: Send POWER_OFF command when entering hibernate
   mode.
2. Conditional sleep commands: Only send POWER_SLEEP/POWER_ON commands
   during system suspend/resume when the touch device is not configured
   as a wake source, preserving Wake-on-Touch (WoT) functionality. This
   ensures proper power states while maintaining expected wake behavior.

Signed-off-by: Even Xu <even.xu@intel.com>
Tested-by: Rui Zhang <rui1.zhang@intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>

Author: Evenxf

drivers/hid/intel-thc-hid/intel-quickspi/pci-quickspi.c

@@ -749,9 +749,11 @@ static int quickspi_suspend(struct device *device)
 	if (!qsdev)
 		return -ENODEV;
 
-	ret = quickspi_set_power(qsdev, HIDSPI_SLEEP);
-	if (ret)
-		return ret;
+	if (!device_may_wakeup(qsdev->dev)) {
+		ret = quickspi_set_power(qsdev, HIDSPI_SLEEP);
+		if (ret)
+			return ret;
+	}
 
 	ret = thc_interrupt_quiesce(qsdev->thc_hw, true);
 	if (ret)
@@ -790,9 +792,8 @@ static int quickspi_resume(struct device *device)
 	if (ret)
 		return ret;
 
-	ret = quickspi_set_power(qsdev, HIDSPI_ON);
-	if (ret)
-		return ret;
+	if (!device_may_wakeup(qsdev->dev))
+		return quickspi_set_power(qsdev, HIDSPI_ON);
 
 	return 0;
 }
@@ -851,6 +852,9 @@ static int quickspi_poweroff(struct device *device)
 	if (!qsdev)
 		return -ENODEV;
 
+	/* Ignore the return value as platform will be poweroff soon */
+	quickspi_set_power(qsdev, HIDSPI_OFF);
+
 	ret = thc_interrupt_quiesce(qsdev->thc_hw, true);
 	if (ret)
 		return ret;