diff options
| author | Jonathan Corbet <corbet@lwn.net> | 2010-10-28 21:23:21 +0400 |
|---|---|---|
| committer | Florian Tobias Schandinat <FlorianSchandinat@gmx.de> | 2010-11-09 19:18:29 +0300 |
| commit | 67eb6f9617a24dfb033b584d6b1b42b39cc9297a (patch) | |
| tree | 52cdf39d5a27a44935b5f15724b62cad0d436418 /drivers/video/via | |
| parent | 751305d9b2fd3e03eaab7808e976241d85ca4353 (diff) | |
| download | linux-67eb6f9617a24dfb033b584d6b1b42b39cc9297a.tar.xz | |
viafb: suspend/resume for GPIOs
Be sure to re-enable GPIO lines on resume. Users still have to
be sure to set them properly.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Diffstat (limited to 'drivers/video/via')
| -rw-r--r-- | drivers/video/via/via-gpio.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/video/via/via-gpio.c b/drivers/video/via/via-gpio.c index 39acb37e7a1d..c2a0a1cfd3b3 100644 --- a/drivers/video/via/via-gpio.c +++ b/drivers/video/via/via-gpio.c @@ -172,6 +172,28 @@ static void viafb_gpio_disable(struct viafb_gpio *gpio) via_write_reg_mask(VIASR, gpio->vg_port_index, 0, 0x02); } +#ifdef CONFIG_PM + +static int viafb_gpio_suspend(void *private) +{ + return 0; +} + +static int viafb_gpio_resume(void *private) +{ + int i; + + for (i = 0; i < gpio_config.gpio_chip.ngpio; i += 2) + viafb_gpio_enable(gpio_config.active_gpios[i]); + return 0; +} + +static struct viafb_pm_hooks viafb_gpio_pm_hooks = { + .suspend = viafb_gpio_suspend, + .resume = viafb_gpio_resume +}; +#endif /* CONFIG_PM */ + /* * Look up a specific gpio and return the number it was assigned. */ @@ -236,6 +258,9 @@ static __devinit int viafb_gpio_probe(struct platform_device *platdev) printk(KERN_ERR "viafb: failed to add gpios (%d)\n", ret); gpio_config.gpio_chip.ngpio = 0; } +#ifdef CONFIG_PM + viafb_pm_register(&viafb_gpio_pm_hooks); +#endif return ret; } @@ -245,6 +270,10 @@ static int viafb_gpio_remove(struct platform_device *platdev) unsigned long flags; int ret = 0, i; +#ifdef CONFIG_PM + viafb_pm_unregister(&viafb_gpio_pm_hooks); +#endif + /* * Get unregistered. */ |