mfd: cpcap-whisper: Only hold wake lock during debouncing

Only need to hold the wake lock during debouncing.  This change allows
the device to suspend when docks are attached, resulting in better
current drain.

Change-Id: Ieb72bacc5da3678a25a70a34620faa0c8620cbd2
Signed-off-by: Greg Meiste <w30289@motorola.com>

diff --git a/drivers/mfd/cpcap-whisper.c b/drivers/mfd/cpcap-whisper.c
index 673871101a35f42bcaf7e4cbdd12cd4f875ae07b..f2c428e86559ed36f1125b9bf6ac6dcc1823f71a 100644 (file)
--- a/drivers/mfd/cpcap-whisper.c
+++ b/drivers/mfd/cpcap-whisper.c
@@ -170,7 +170,6 @@ static DEVICE_ATTR(dock_prop, S_IRUGO | S_IWUSR, dock_prop_show, NULL);
 static void vusb_enable(struct cpcap_whisper_data *data)
 {
        if (!data->is_vusb_enabled) {
-               wake_lock(&data->wake_lock);
                regulator_enable(data->regulator);
                data->is_vusb_enabled = 1;
        }
@@ -179,7 +178,6 @@ static void vusb_enable(struct cpcap_whisper_data *data)
 static void vusb_disable(struct cpcap_whisper_data *data)
 {
        if (data->is_vusb_enabled) {
-               wake_unlock(&data->wake_lock);
                regulator_disable(data->regulator);
                data->is_vusb_enabled = 0;
        }
@@ -339,6 +337,8 @@ static void whisper_notify(struct cpcap_whisper_data *di, enum cpcap_accy accy)
                memset(di->dock_prop, 0, CPCAP_WHISPER_PROP_SIZE);
                tegra_cpcap_audio_dock_state(false);
        }
+
+       wake_lock_timeout(&di->wake_lock, HZ / 2);
 }
 
 static void whisper_audio_check(struct cpcap_whisper_data *di)
@@ -387,6 +387,7 @@ static void whisper_det_work(struct work_struct *work)
 
        switch (data->state) {
        case CONFIG:
+               wake_lock(&data->wake_lock);
                vusb_enable(data);
                cpcap_irq_mask(data->cpcap, CPCAP_IRQ_CHRG_DET);
                cpcap_irq_mask(data->cpcap, CPCAP_IRQ_IDFLOAT);