diff options
| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2014-08-19 15:00:01 +0400 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2014-08-21 16:44:57 +0400 |
| commit | 8117bd531501ec329e4c9ea96fb7f9d5504c82f5 (patch) | |
| tree | ede639d8682a7c4305fd46c87341785de50add23 /drivers/gpio | |
| parent | 58b84f6a97f7f8811e0636836734809ff52cad43 (diff) | |
| download | linux-8117bd531501ec329e4c9ea96fb7f9d5504c82f5.tar.xz | |
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>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-lynxpoint.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-lynxpoint.c b/drivers/gpio/gpio-lynxpoint.c index ff9eb911b5e4..fa945ec9ccff 100644 --- a/drivers/gpio/gpio-lynxpoint.c +++ b/drivers/gpio/gpio-lynxpoint.c @@ -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[] = { |