From 67eb6f9617a24dfb033b584d6b1b42b39cc9297a Mon Sep 17 00:00:00 2001 From: Jonathan Corbet Date: Thu, 28 Oct 2010 18:23:21 +0100 Subject: [PATCH] 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 Signed-off-by: Daniel Drake Signed-off-by: Florian Tobias Schandinat --- drivers/video/via/via-gpio.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) 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. */ -- 2.39.2