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>
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@ -172,6 +172,28 @@ static void viafb_gpio_disable(struct viafb_gpio *gpio)
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via_write_reg_mask(VIASR, gpio->vg_port_index, 0, 0x02);
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}
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#ifdef CONFIG_PM
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static int viafb_gpio_suspend(void *private)
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{
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return 0;
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}
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static int viafb_gpio_resume(void *private)
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{
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int i;
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for (i = 0; i < gpio_config.gpio_chip.ngpio; i += 2)
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viafb_gpio_enable(gpio_config.active_gpios[i]);
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return 0;
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}
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static struct viafb_pm_hooks viafb_gpio_pm_hooks = {
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.suspend = viafb_gpio_suspend,
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.resume = viafb_gpio_resume
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};
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#endif /* CONFIG_PM */
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/*
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* Look up a specific gpio and return the number it was assigned.
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*/
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@ -236,6 +258,9 @@ static __devinit int viafb_gpio_probe(struct platform_device *platdev)
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printk(KERN_ERR "viafb: failed to add gpios (%d)\n", ret);
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gpio_config.gpio_chip.ngpio = 0;
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}
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#ifdef CONFIG_PM
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viafb_pm_register(&viafb_gpio_pm_hooks);
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#endif
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return ret;
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}
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@ -245,6 +270,10 @@ static int viafb_gpio_remove(struct platform_device *platdev)
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unsigned long flags;
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int ret = 0, i;
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#ifdef CONFIG_PM
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viafb_pm_unregister(&viafb_gpio_pm_hooks);
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#endif
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/*
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* Get unregistered.
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*/
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