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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: Jerome Blin <jerome.blin@intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Mathias Nyman 2014-08-19 14:00:01 +03:00 committed by Linus Walleij
parent 58b84f6a97
commit 8117bd5315
1 changed files with 18 additions and 0 deletions
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18
drivers/gpio/gpio-lynxpoint.c
View File

@ -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[] = {