Messages in this thread Patch in this message | | | From | Mathias Nyman <> | Subject | [PATCH] gpio-lynxpoint: enable input sensing in resume | Date | Tue, 19 Aug 2014 13:30:28 +0300 |
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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> --- drivers/gpio/gpio-lynxpoint.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)
diff --git a/drivers/gpio/gpio-lynxpoint.c b/drivers/gpio/gpio-lynxpoint.c index ff9eb91..4165672 100644 --- a/drivers/gpio/gpio-lynxpoint.c +++ b/drivers/gpio/gpio-lynxpoint.c @@ -407,9 +407,33 @@ static int lp_gpio_runtime_resume(struct device *dev) return 0; } +static int lp_gpio_suspend(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, + .suspend = lp_gpio_suspend, + .resume = lp_gpio_resume, }; static const struct acpi_device_id lynxpoint_gpio_acpi_match[] = { -- 1.8.3.2
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