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Commit 9d71ea05 authored by Bruno Prémont's avatar Bruno Prémont Committed by Jiri Kosina
Browse files

HID: add PM support to PicoLCD device 



Add PM support in order to turn off backlight on suspend, restore
it on resume and especially restore complete state on reset-resume.

Signed-off-by: default avatarBruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent d6d53cbc

drivers/hid/hid-picolcd.c

+74 −5
Original line number Diff line number Diff line
@@ -763,7 +763,7 @@ static inline int picolcd_init_framebuffer(struct picolcd_data *data) 
{

	return 0;

}

static void picolcd_exit_framebuffer(struct picolcd_data *data)

static inline void picolcd_exit_framebuffer(struct picolcd_data *data)

{

}

#define picolcd_fbinfo(d) NULL
@@ -852,6 +852,18 @@ static inline int picolcd_resume_backlight(struct picolcd_data *data) 
	return picolcd_set_brightness(data->backlight);

}



#ifdef CONFIG_PM

static void picolcd_suspend_backlight(struct picolcd_data *data)

{

	int bl_power = data->lcd_power;

	if (!data->backlight)

		return;



	data->backlight->props.power = FB_BLANK_POWERDOWN;

	picolcd_set_brightness(data->backlight);

	data->lcd_power = data->backlight->props.power = bl_power;

}

#endif /* CONFIG_PM */

#else

static inline int picolcd_init_backlight(struct picolcd_data *data,

		struct hid_report *report)
@@ -865,6 +877,9 @@ static inline int picolcd_resume_backlight(struct picolcd_data *data) 
{

	return 0;

}

static inline void picolcd_suspend_backlight(struct picolcd_data *data)

{

}

#endif /* CONFIG_HID_PICOLCD_BACKLIGHT */



#ifdef CONFIG_HID_PICOLCD_LCD
@@ -1098,7 +1113,7 @@ static inline int picolcd_init_leds(struct picolcd_data *data, 
{

	return 0;

}

static void picolcd_exit_leds(struct picolcd_data *data)

static inline void picolcd_exit_leds(struct picolcd_data *data)

{

}

static inline int picolcd_leds_set(struct picolcd_data *data)
@@ -2214,9 +2229,18 @@ static void picolcd_exit_devfs(struct picolcd_data *data) 
	mutex_destroy(&data->mutex_flash);

}

#else

#define picolcd_debug_raw_event(data, hdev, report, raw_data, size)

#define picolcd_init_devfs(data, eeprom_r, eeprom_w, flash_r, flash_w, reset)

static void picolcd_exit_devfs(struct picolcd_data *data)

static inline void picolcd_debug_raw_event(struct picolcd_data *data,

		struct hid_device *hdev, struct hid_report *report,

		u8 *raw_data, int size)

{

}

static inline void picolcd_init_devfs(struct picolcd_data *data,

		struct hid_report *eeprom_r, struct hid_report *eeprom_w,

		struct hid_report *flash_r, struct hid_report *flash_w,

		struct hid_report *reset)

{

}

static inline void picolcd_exit_devfs(struct picolcd_data *data)

{

}

#endif /* CONFIG_DEBUG_FS */
@@ -2259,6 +2283,46 @@ static int picolcd_raw_event(struct hid_device *hdev, 
	return 1;

}



#ifdef CONFIG_PM

static int picolcd_suspend(struct hid_device *hdev, pm_message_t message)

{

	if (message.event & PM_EVENT_AUTO)

		return 0;



	picolcd_suspend_backlight(hid_get_drvdata(hdev));

	dbg_hid(PICOLCD_NAME " device ready for suspend\n");

	return 0;

}



static int picolcd_resume(struct hid_device *hdev)

{

	int ret;

	ret = picolcd_resume_backlight(hid_get_drvdata(hdev));

	if (ret)

		dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);

	return 0;

}



static int picolcd_reset_resume(struct hid_device *hdev)

{

	int ret;

	ret = picolcd_reset(hdev);

	if (ret)

		dbg_hid(PICOLCD_NAME " resetting our device failed: %d\n", ret);

	ret = picolcd_fb_reset(hid_get_drvdata(hdev), 0);

	if (ret)

		dbg_hid(PICOLCD_NAME " restoring framebuffer content failed: %d\n", ret);

	ret = picolcd_resume_lcd(hid_get_drvdata(hdev));

	if (ret)

		dbg_hid(PICOLCD_NAME " restoring lcd failed: %d\n", ret);

	ret = picolcd_resume_backlight(hid_get_drvdata(hdev));

	if (ret)

		dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);

	picolcd_leds_set(hid_get_drvdata(hdev));

	return 0;

}

#endif



/* initialize keypad input device */

static int picolcd_init_keys(struct picolcd_data *data,

		struct hid_report *report)
@@ -2544,6 +2608,11 @@ static struct hid_driver picolcd_driver = { 
	.probe =         picolcd_probe,

	.remove =        picolcd_remove,

	.raw_event =     picolcd_raw_event,

#ifdef CONFIG_PM

	.suspend =       picolcd_suspend,

	.resume =        picolcd_resume,

	.reset_resume =  picolcd_reset_resume,

#endif

};



static int __init picolcd_init(void)