mfd: ab8500-gpadc: Implemented suspend/resume

suspend/resume methods implemented to prevent suspend while the gpadc
driver is busy.

Signed-off-by: Daniel WILLERUD <daniel.willerud@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com>
Reviewed-by: Ulf HANSSON <ulf.hansson@stericsson.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/drivers/mfd/ab8500-gpadc.c b/drivers/mfd/ab8500-gpadc.c
index b1f3561..9ed3afc 100644 (file)
--- a/drivers/mfd/ab8500-gpadc.c
+++ b/drivers/mfd/ab8500-gpadc.c
@@ -605,6 +605,31 @@ static int ab8500_gpadc_runtime_idle(struct device *dev)
        return 0;
 }
 
+static int ab8500_gpadc_suspend(struct device *dev)
+{
+       struct ab8500_gpadc *gpadc = dev_get_drvdata(dev);
+
+       mutex_lock(&gpadc->ab8500_gpadc_lock);
+
+       pm_runtime_get_sync(dev);
+
+       regulator_disable(gpadc->regu);
+       return 0;
+}
+
+static int ab8500_gpadc_resume(struct device *dev)
+{
+       struct ab8500_gpadc *gpadc = dev_get_drvdata(dev);
+
+       regulator_enable(gpadc->regu);
+
+       pm_runtime_mark_last_busy(gpadc->dev);
+       pm_runtime_put_autosuspend(gpadc->dev);
+
+       mutex_unlock(&gpadc->ab8500_gpadc_lock);
+       return 0;
+}
+
 static int ab8500_gpadc_probe(struct platform_device *pdev)
 {
        int ret = 0;
@@ -698,6 +723,9 @@ static const struct dev_pm_ops ab8500_gpadc_pm_ops = {
        SET_RUNTIME_PM_OPS(ab8500_gpadc_runtime_suspend,
                           ab8500_gpadc_runtime_resume,
                           ab8500_gpadc_runtime_idle)
+       SET_SYSTEM_SLEEP_PM_OPS(ab8500_gpadc_suspend,
+                               ab8500_gpadc_resume)
+
 };
 
 static struct platform_driver ab8500_gpadc_driver = {