From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bruno =?UTF-8?B?UHLDqW1vbnQ=?= Subject: [PATCH 2/2] hid: add PM support to PicoLCD device Date: Sun, 25 Apr 2010 21:43:06 +0200 Message-ID: <20100425214306.5d7be049@neptune.home> References: <20100425214003.7e87c6a3@neptune.home> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20100425214003.7e87c6a3@neptune.home> Sender: linux-kernel-owner@vger.kernel.org To: Oliver Neukum , Jiri Kosina Cc: Dmitry Torokhov , linux-input@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Nicu Pavel , Jaya Kumar , "Rick L. Vinyard Jr." List-Id: linux-input@vger.kernel.org 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 Pr=C3=A9mont --- drivers/hid/hid-picolcd.c | 61 +++++++++++++++++++++++++++++++++++++= ++++++++ 1 files changed, 61 insertions(+), 0 deletions(-) diff --git a/drivers/hid/hid-picolcd.c b/drivers/hid/hid-picolcd.c index aa6f2e1..c652390 100644 --- a/drivers/hid/hid-picolcd.c +++ b/drivers/hid/hid-picolcd.c @@ -852,6 +852,20 @@ static inline int picolcd_resume_backlight(struct = picolcd_data *data) return picolcd_set_brightness(data->backlight); } =20 +#ifdef CONFIG_PM +static void picolcd_suspend_backlight(struct picolcd_data *data) +{ + int bl_power =3D data->lcd_power; + if (!data->backlight) + return; + + data->backlight->props.power =3D FB_BLANK_POWERDOWN; + picolcd_set_brightness(data->backlight); + data->lcd_power =3D data->backlight->props.power =3D bl_power; +} +#else +#define picolcd_suspend_backlight(a) +#endif /* CONFIG_PM */ #else static inline int picolcd_init_backlight(struct picolcd_data *data, struct hid_report *report) @@ -865,6 +879,7 @@ static inline int picolcd_resume_backlight(struct p= icolcd_data *data) { return 0; } +#define picolcd_suspend_backlight(a) #endif /* CONFIG_HID_PICOLCD_BACKLIGHT */ =20 #ifdef CONFIG_HID_PICOLCD_LCD @@ -2259,6 +2274,46 @@ static int picolcd_raw_event(struct hid_device *= hdev, return 1; } =20 +#ifdef CONFIG_PM +static int picolcd_suspend(struct hid_device *hdev, pm_message_t messa= ge) +{ + 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 =3D 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 =3D picolcd_reset(hdev); + if (ret) + dbg_hid(PICOLCD_NAME " resetting our device failed: %d\n", ret); + ret =3D picolcd_fb_reset(hid_get_drvdata(hdev), 0); + if (ret) + dbg_hid(PICOLCD_NAME " restoring framebuffer content failed: %d\n", = ret); + ret =3D picolcd_resume_lcd(hid_get_drvdata(hdev)); + if (ret) + dbg_hid(PICOLCD_NAME " restoring lcd failed: %d\n", ret); + ret =3D 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 +2599,11 @@ static struct hid_driver picolcd_driver =3D { .probe =3D picolcd_probe, .remove =3D picolcd_remove, .raw_event =3D picolcd_raw_event, +#ifdef CONFIG_PM + .suspend =3D picolcd_suspend, + .resume =3D picolcd_resume, + .reset_resume =3D picolcd_reset_resume, +#endif }; =20 static int __init picolcd_init(void) --=20 1.6.4.4