linux驱动增加work工作队列和获取唤醒锁操作

diff --git a/android-lte/kernel/drivers/input/keyboard/tca8418_keypad.c b/android-lte/kernel/drivers/input/keyboard/tca8418_keypad.cindex 187ff5b..682109b 100755--- a/android-lte/kernel/drivers/input/keyboard/tca8418_keypad.c+++ b/android-lte/kernel/drivers/input/keyboard/tca8418_keypad.c@@ -141,6 +141,8 @@ struct tca8418_keypad {  struct i2c_client *client; struct input_dev *input;+struct delayed_work tca8418_work;+struct wake_lock w_wake_lock; #ifdef CONFIG_HAS_EARLYSUSPEND struct early_suspend early_suspend; #endif@@ -188,6 +190,7 @@ static int tca8418_read_byte(struct tca8418_keypad *keypad_data,  return 0; }+#if 1 /* [函数描述] 把从寄存器里面读出来的值进行转化 5X6 原本应该读出来的值是 0~29 但是现在值不正确 [作者]韦启发@@ -260,42 +263,17 @@ static void tca8418_read_keypad(struct tca8418_keypad *keypad_data)  input_sync(keypad_data->input); }-+#endif /*  * Threaded IRQ handler and this can (and will) sleep.  */ static irqreturn_t tca8418_irq_handler(int irq, void *dev_id) { struct tca8418_keypad *keypad_data = dev_id;-u8 reg;-int error;-enable_irq_wake(irq);-printk("%s\n", __FUNCTION__);--error = tca8418_read_byte(keypad_data, REG_INT_STAT, &reg);-if (error) {-dev_err(&keypad_data->client->dev,-"unable to read REG_INT_STAT\n");-goto exit;-}+printk("%s\n",__func__);+enable_irq_wake(irq);/*深度休眠唤醒*/ -//printk("%s, reg = %d\n", __FUNCTION__, reg);--if (reg & INT_STAT_OVR_FLOW_INT)-dev_warn(&keypad_data->client->dev, "overflow occurred\n");--if (reg & INT_STAT_K_INT)-tca8418_read_keypad(keypad_data);--exit:-/* Clear all interrupts, even IRQs we didn't check (GPI, CAD, LCK) */-    //printk("%s failed\n", __FUNCTION__);-reg = 0xff;-error = tca8418_write_byte(keypad_data, REG_INT_STAT, reg);-if (error)-dev_err(&keypad_data->client->dev,-"unable to clear REG_INT_STAT\n");-+schedule_delayed_work(&keypad_data->tca8418_work,0);/*延迟启动中断队列*/ return IRQ_HANDLED; } #ifdef CONFIG_PM_SLEEP@@ -344,7 +322,8 @@ static int __devinit tca8418_configure(struct tca8418_keypad *keypad_data) printk("tca8418_configure faile\n"); return -ENODEV; }-+error |= tca8418_read_byte(keypad_data, REG_CFG, &reg_r);/*键盘读寄存器，用来确认设置的是否正确*/+printk("%s REG_CFG[0x%x]=[0x%x]\n",__func__,REG_CFG,reg_r);  /* Assemble a mask for row and column registers */ reg  =  ~(~0 << keypad_data->rows);@@ -373,6 +352,53 @@ static int __devinit tca8418_configure(struct tca8418_keypad *keypad_data) return error; } +static void tca8418_key_keypad_data(struct work_struct *work)+{+struct tca8418_keypad *keypad_data = container_of((struct delayed_work*)work, struct tca8418_keypad,tca8418_work);+u8 reg;+int error;+wake_lock(&keypad_data->w_wake_lock);/*使能唤醒锁*/+disable_irq_nosync(keypad_data->irq);/*屏蔽中断*/+printk("%s start\n", __FUNCTION__);+++error = tca8418_read_byte(keypad_data, REG_INT_STAT, &reg);+if (error) {+dev_err(&keypad_data->client->dev,+"unable to read REG_INT_STAT\n");+goto exit;+}+else+printk("%s reg = %d\n",__func__, reg);+++if (reg & INT_STAT_OVR_FLOW_INT)+dev_warn(&keypad_data->client->dev, "overflow occurred\n");++if (reg & INT_STAT_K_INT)+tca8418_read_keypad(keypad_data);++exit:+/* Clear all interrupts, even IRQs we didn't check (GPI, CAD, LCK) */+    //printk("%s failed\n", __FUNCTION__);+reg = 0xff;+error = tca8418_write_byte(keypad_data, REG_INT_STAT, reg);+if (error){+dev_err(&keypad_data->client->dev,"unable to clear REG_INT_STAT\n");+error = tca8418_write_byte(keypad_data, REG_INT_STAT, reg);+if(error)+{+schedule_delayed_work(&keypad_data->tca8418_work,usecs_to_jiffies(300));/*延迟300ms启动中断队列*/+printk("%s unable to clear REG_INT_STAT again\n",__func__);+}else{+printk("%s\n clear REG_INT_STAT success",__func__);+}+}+printk("%s end\n", __FUNCTION__);+    enable_irq(keypad_data->irq);/*重新开启中断*/+wake_unlock(&keypad_data->w_wake_lock);/*屏蔽唤醒锁*/+}+ static int __devinit tca8418_keypad_probe(struct i2c_client *client,   const struct i2c_device_id *id) {@@ -496,6 +522,9 @@ static int __devinit tca8418_keypad_probe(struct i2c_client *client,  if (pdata->irq_is_gpio) client->irq = gpio_to_irq(client->irq);+/*初始化wakelock锁，工作队列，和申请中断*/+wake_lock_init(&keypad_data->w_wake_lock, WAKE_LOCK_SUSPEND, "tca8418_wakelock");+INIT_DELAYED_WORK(&keypad_data->tca8418_work,tca8418_key_keypad_data);  error = request_threaded_irq(client->irq, NULL, tca8418_irq_handler,      IRQF_TRIGGER_FALLING,