From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vasily Khoruzhick Date: Sun, 28 Oct 2012 15:49:17 +0000 Subject: [PATCH] lms283gf05: add suspend/resume handlers Message-Id: <1351439357-9843-1-git-send-email-anarsoul@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-fbdev@vger.kernel.org Signed-off-by: Vasily Khoruzhick --- drivers/video/backlight/lms283gf05.c | 42 ++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/drivers/video/backlight/lms283gf05.c b/drivers/video/backlight/lms283gf05.c index ea43f22..ed15752 100644 --- a/drivers/video/backlight/lms283gf05.c +++ b/drivers/video/backlight/lms283gf05.c @@ -22,6 +22,7 @@ struct lms283gf05_state { struct spi_device *spi; struct lcd_device *ld; + unsigned int power; }; struct lms283gf05_seq { @@ -130,6 +131,8 @@ static int lms283gf05_power_set(struct lcd_device *ld, int power) struct spi_device *spi = st->spi; struct lms283gf05_pdata *pdata = spi->dev.platform_data; + st->power = power; + if (power <= FB_BLANK_NORMAL) { if (pdata) lms283gf05_reset(pdata->reset_gpio, @@ -193,6 +196,43 @@ static int __devinit lms283gf05_probe(struct spi_device *spi) return 0; } +#if defined(CONFIG_PM) +static unsigned int before_power; + +static int lms283gf05_suspend(struct spi_device *spi, pm_message_t mesg) +{ + int ret = 0; + struct lms283gf05_state *state = dev_get_drvdata(&spi->dev); + + dev_dbg(&spi->dev, "lcd->power = %d\n", state->power); + + before_power = state->power; + + /* + * when lcd panel is suspend, lcd panel becomes off + * regardless of status. + */ + ret = lms283gf05_power_set(state->ld, FB_BLANK_POWERDOWN); + + return ret; +} + +static int lms283gf05_resume(struct spi_device *spi) +{ + int ret = 0; + struct lms283gf05_state *state = dev_get_drvdata(&spi->dev); + + dev_dbg(&spi->dev, "before_power = %d\n", before_power); + + ret = lms283gf05_power_set(state->ld, before_power); + + return ret; +} +#else +#define lms283gf05_suspend NULL +#define lms283gf05_resume NULL +#endif + static int __devexit lms283gf05_remove(struct spi_device *spi) { struct lms283gf05_state *st = dev_get_drvdata(&spi->dev); @@ -209,6 +249,8 @@ static struct spi_driver lms283gf05_driver = { }, .probe = lms283gf05_probe, .remove = __devexit_p(lms283gf05_remove), + .suspend = lms283gf05_suspend, + .resume = lms283gf05_resume, }; module_spi_driver(lms283gf05_driver); -- 1.7.12.4