target: Modify API for detecting volume up key in timer callback

Modify function for detecting volume up key in timer callback

Change-Id: I54eccca8c9429fe66745592cc01089e3e7c05bd7
diff --git a/target/msm8996/init.c b/target/msm8996/init.c
index 63c3b2d..a67c3da 100644
--- a/target/msm8996/init.c
+++ b/target/msm8996/init.c
@@ -99,19 +99,24 @@
 /* Return 1 if vol_up pressed */
 int target_volume_up()
 {
+	static uint8_t first_time = 0;
 	uint8_t status = 0;
 	struct pm8x41_gpio gpio;
 
-	/* Configure the GPIO */
-	gpio.direction = PM_GPIO_DIR_IN;
-	gpio.function  = 0;
-	gpio.pull      = PM_GPIO_PULL_UP_30;
-	gpio.vin_sel   = 2;
+	if (!first_time) {
+		/* Configure the GPIO */
+		gpio.direction = PM_GPIO_DIR_IN;
+		gpio.function  = 0;
+		gpio.pull      = PM_GPIO_PULL_UP_30;
+		gpio.vin_sel   = 2;
 
-	pm8x41_gpio_config(2, &gpio);
+		pm8x41_gpio_config(2, &gpio);
 
-	/* Wait for the pmic gpio config to take effect */
-	thread_sleep(1);
+		/* Wait for the pmic gpio config to take effect */
+		udelay(10000);
+
+		first_time = 1;
+	}
 
 	/* Get status of P_GPIO_5 */
 	pm8x41_gpio_get(2, &status);