[PATCH v6 8/8] hid: add PM support to PicoLCD device
STALE6002d
From: Bruno Prémont <bonbons@linux-vserver.org>
Date: 2010-03-30 20:47:27
Also in:
linux-input, lkml
Subsystem:
hid core layer, picolcd hid driver, the rest · Maintainers:
Jiri Kosina, Benjamin Tissoires, Bruno Prémont, Linus Torvalds
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> --- drivers/hid/hid-picolcd.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 42 insertions(+), 0 deletions(-)
diff --git a/drivers/hid/hid-picolcd.c b/drivers/hid/hid-picolcd.c
index fe1f772..daa7c5d 100644
--- a/drivers/hid/hid-picolcd.c
+++ b/drivers/hid/hid-picolcd.c@@ -2255,6 +2255,43 @@ static int picolcd_raw_event(struct hid_device *hdev, return 1; } +#ifdef CONFIG_PM +static int picolcd_suspend(struct hid_device *hdev) +{ + 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)
@@ -2530,6 +2567,11 @@ 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)
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1.6.4.4