Commit 6761f9cc authored by Even Xu's avatar Even Xu Committed by Jiri Kosina
Browse files

HID: Intel-thc-hid: Intel-quicki2c: Add power management for touch device 



Send POWER_SLEEP command to touch device when system enters into sleep
mode or hibernate mode to save more power; and send POWER_ON command to
take device back when system exits sleep mode.

Signed-off-by: default avatarEven Xu <even.xu@intel.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.com>
parent a788b205

drivers/hid/intel-thc-hid/intel-quicki2c/pci-quicki2c.c

+13 −1
Original line number Diff line number Diff line
@@ -807,6 +807,12 @@ static int quicki2c_suspend(struct device *device) 
	if (!qcdev)

		return -ENODEV;



	if (!device_may_wakeup(qcdev->dev)) {

		ret = quicki2c_set_power(qcdev, HIDI2C_SLEEP);

		if (ret)

			return ret;

	}



	/*

	 * As I2C is THC subsystem, no register auto save/restore support,

	 * need driver to do that explicitly for every D3 case.
@@ -856,6 +862,9 @@ static int quicki2c_resume(struct device *device) 
	if (ret)

		return ret;



	if (!device_may_wakeup(qcdev->dev))

		return quicki2c_set_power(qcdev, HIDI2C_ON);



	return 0;

}
@@ -913,6 +922,9 @@ static int quicki2c_poweroff(struct device *device) 
	if (!qcdev)

		return -ENODEV;



	/* Ignore the return value as platform will be poweroff soon */

	quicki2c_set_power(qcdev, HIDI2C_SLEEP);



	ret = thc_interrupt_quiesce(qcdev->thc_hw, true);

	if (ret)

		return ret;
@@ -966,7 +978,7 @@ static int quicki2c_restore(struct device *device) 


	thc_change_ltr_mode(qcdev->thc_hw, THC_LTR_MODE_ACTIVE);



	return 0;

	return quicki2c_set_power(qcdev, HIDI2C_ON);

}



static int quicki2c_runtime_suspend(struct device *device)