From: Jonathan Corbet <corbet@xxxxxxxxxxx>
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@xxxxxxx>
Signed-off-by: Daniel Drake <dsd@xxxxxxxxxx>
---
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 39acb37..c2a0a1c 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.
*/
--
1.7.2.3
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