solve the problem we should push power button twice when device resume.

diff --git a/drivers/input/misc/twl6030-pwrbutton.c b/drivers/input/misc/twl6030-pwrbutton.c
index e8efb64a93d23b3d9f2b8231879e69918594a305..0ff9a1128f40213f804b9aa4af87133f232003c4 100755 (executable)
--- a/drivers/input/misc/twl6030-pwrbutton.c
+++ b/drivers/input/misc/twl6030-pwrbutton.c
@@ -41,6 +41,7 @@
 struct twl6030_pwr_button {
        struct input_dev *input_dev;
        struct device           *dev;
+       struct mutex            irq_lock;
        int report_key;
 };
 
@@ -79,27 +80,35 @@ static irqreturn_t powerbutton_irq(int irq, void *_pwr)
        int hw_state;
        int pwr_val;
        static int prev_hw_state = 0xFFFF;
-       static int push_release_flag;
-
+       static int push_release_flag = 0 ;
+       
+       mutex_lock(& pwr ->irq_lock);
        hw_state = twl6030_readb(pwr, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
        pwr_val = !(hw_state & PWR_PWRON_IRQ);
+
        if ((prev_hw_state != pwr_val) && (prev_hw_state != 0xFFFF)) {
                push_release_flag = 0;
                input_report_key(pwr->input_dev, pwr->report_key, pwr_val);
                input_sync(pwr->input_dev);
        } else if (!push_release_flag) {
                push_release_flag = 1;
-               input_report_key(pwr->input_dev, pwr->report_key, pwr_val);
-               input_sync(pwr->input_dev);
-
-       //      msleep(20);
-
-       //      input_report_key(pwr->input_dev, pwr->report_key, !pwr_val);
-       //      input_sync(pwr->input_dev);
+               if(prev_hw_state != 0xFFFF){
+                       input_report_key(pwr->input_dev, pwr->report_key, !pwr_val);
+                       input_sync(pwr->input_dev);
+
+                       msleep(20);
+                       input_report_key(pwr->input_dev, pwr->report_key, pwr_val);
+                       input_sync(pwr->input_dev);
+               }
+               else    {
+                       input_report_key(pwr->input_dev, pwr->report_key, pwr_val);
+                       input_sync(pwr->input_dev);
+               }
        } else
                push_release_flag = 0;
 
        prev_hw_state = pwr_val;
+       mutex_unlock(& pwr ->irq_lock);
 
        return IRQ_HANDLED;
 }
@@ -145,6 +154,7 @@ static int __devinit twl6030_pwrbutton_probe(struct platform_device *pdev)
                dev_dbg(&pdev->dev, "Can't register power button: %d\n", err);
                goto free_irq;
        }
+       mutex_init(&pwr_button->irq_lock);
 
        twl6030_interrupt_unmask(0x01, REG_INT_MSK_LINE_A);
        twl6030_interrupt_unmask(0x01, REG_INT_MSK_STS_A);