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Commit 8117bd53 authored by Mathias Nyman's avatar Mathias Nyman Committed by Linus Walleij
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gpio-lynxpoint: enable input sensing in resume 



It appears that input sensing bit might be reset during
suspend/resume. Set input sensing again for all requested gpios
in resume

Tested-by: default avatarJerome Blin <jerome.blin@intel.com>
Signed-off-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Acked-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 58b84f6a

drivers/gpio/gpio-lynxpoint.c

+18 −0
Original line number Diff line number Diff line
@@ -407,9 +407,27 @@ static int lp_gpio_runtime_resume(struct device *dev) 
	return 0;

}



static int lp_gpio_resume(struct device *dev)

{

	struct platform_device *pdev = to_platform_device(dev);

	struct lp_gpio *lg = platform_get_drvdata(pdev);

	unsigned long reg;

	int i;



	/* on some hardware suspend clears input sensing, re-enable it here */

	for (i = 0; i < lg->chip.ngpio; i++) {

		if (gpiochip_is_requested(&lg->chip, i) != NULL) {

			reg = lp_gpio_reg(&lg->chip, i, LP_CONFIG2);

			outl(inl(reg) & ~GPINDIS_BIT, reg);

		}

	}

	return 0;

}



static const struct dev_pm_ops lp_gpio_pm_ops = {

	.runtime_suspend = lp_gpio_runtime_suspend,

	.runtime_resume = lp_gpio_runtime_resume,

	.resume = lp_gpio_resume,

};



static const struct acpi_device_id lynxpoint_gpio_acpi_match[] = {