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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: Bruno Prémont <bonbons@linux-vserver.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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commit
9d71ea057b
1 changed files with 74 additions and 5 deletions
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@ -763,7 +763,7 @@ static inline int picolcd_init_framebuffer(struct picolcd_data *data)
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{
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return 0;
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}
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static void picolcd_exit_framebuffer(struct picolcd_data *data)
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static inline void picolcd_exit_framebuffer(struct picolcd_data *data)
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{
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}
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#define picolcd_fbinfo(d) NULL
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@ -852,6 +852,18 @@ static inline int picolcd_resume_backlight(struct picolcd_data *data)
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return picolcd_set_brightness(data->backlight);
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}
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#ifdef CONFIG_PM
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static void picolcd_suspend_backlight(struct picolcd_data *data)
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{
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int bl_power = data->lcd_power;
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if (!data->backlight)
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return;
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data->backlight->props.power = FB_BLANK_POWERDOWN;
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picolcd_set_brightness(data->backlight);
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data->lcd_power = data->backlight->props.power = bl_power;
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}
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#endif /* CONFIG_PM */
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#else
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static inline int picolcd_init_backlight(struct picolcd_data *data,
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struct hid_report *report)
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@ -865,6 +877,9 @@ static inline int picolcd_resume_backlight(struct picolcd_data *data)
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{
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return 0;
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}
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static inline void picolcd_suspend_backlight(struct picolcd_data *data)
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{
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}
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#endif /* CONFIG_HID_PICOLCD_BACKLIGHT */
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#ifdef CONFIG_HID_PICOLCD_LCD
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@ -1098,7 +1113,7 @@ static inline int picolcd_init_leds(struct picolcd_data *data,
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{
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return 0;
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}
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static void picolcd_exit_leds(struct picolcd_data *data)
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static inline void picolcd_exit_leds(struct picolcd_data *data)
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{
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}
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static inline int picolcd_leds_set(struct picolcd_data *data)
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@ -2214,9 +2229,18 @@ static void picolcd_exit_devfs(struct picolcd_data *data)
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mutex_destroy(&data->mutex_flash);
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}
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#else
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#define picolcd_debug_raw_event(data, hdev, report, raw_data, size)
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#define picolcd_init_devfs(data, eeprom_r, eeprom_w, flash_r, flash_w, reset)
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static void picolcd_exit_devfs(struct picolcd_data *data)
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static inline void picolcd_debug_raw_event(struct picolcd_data *data,
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struct hid_device *hdev, struct hid_report *report,
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u8 *raw_data, int size)
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{
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}
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static inline void picolcd_init_devfs(struct picolcd_data *data,
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struct hid_report *eeprom_r, struct hid_report *eeprom_w,
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struct hid_report *flash_r, struct hid_report *flash_w,
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struct hid_report *reset)
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{
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}
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static inline void picolcd_exit_devfs(struct picolcd_data *data)
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{
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}
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#endif /* CONFIG_DEBUG_FS */
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@ -2259,6 +2283,46 @@ static int picolcd_raw_event(struct hid_device *hdev,
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return 1;
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}
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#ifdef CONFIG_PM
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static int picolcd_suspend(struct hid_device *hdev, pm_message_t message)
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{
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if (message.event & PM_EVENT_AUTO)
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return 0;
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picolcd_suspend_backlight(hid_get_drvdata(hdev));
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dbg_hid(PICOLCD_NAME " device ready for suspend\n");
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return 0;
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}
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static int picolcd_resume(struct hid_device *hdev)
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{
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int ret;
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ret = picolcd_resume_backlight(hid_get_drvdata(hdev));
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if (ret)
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dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);
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return 0;
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}
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static int picolcd_reset_resume(struct hid_device *hdev)
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{
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int ret;
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ret = picolcd_reset(hdev);
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if (ret)
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dbg_hid(PICOLCD_NAME " resetting our device failed: %d\n", ret);
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ret = picolcd_fb_reset(hid_get_drvdata(hdev), 0);
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if (ret)
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dbg_hid(PICOLCD_NAME " restoring framebuffer content failed: %d\n", ret);
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ret = picolcd_resume_lcd(hid_get_drvdata(hdev));
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if (ret)
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dbg_hid(PICOLCD_NAME " restoring lcd failed: %d\n", ret);
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ret = picolcd_resume_backlight(hid_get_drvdata(hdev));
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if (ret)
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dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);
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picolcd_leds_set(hid_get_drvdata(hdev));
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return 0;
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}
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#endif
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/* initialize keypad input device */
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static int picolcd_init_keys(struct picolcd_data *data,
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struct hid_report *report)
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@ -2544,6 +2608,11 @@ static struct hid_driver picolcd_driver = {
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.probe = picolcd_probe,
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.remove = picolcd_remove,
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.raw_event = picolcd_raw_event,
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#ifdef CONFIG_PM
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.suspend = picolcd_suspend,
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.resume = picolcd_resume,
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.reset_resume = picolcd_reset_resume,
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#endif
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};
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static int __init picolcd_init(void)
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