Added definition for IT8688E as clone of IT8686E based on online comments.

Author: frankcrawford

it87.c

@@ -22,6 +22,7 @@
  *            IT8655E  Super I/O chip w/LPC interface
  *            IT8665E  Super I/O chip w/LPC interface
  *            IT8686E  Super I/O chip w/LPC interface
+ *            IT8688E  Super I/O chip w/LPC interface
  *            IT8705F  Super I/O chip w/LPC interface
  *            IT8712F  Super I/O chip w/LPC interface
  *            IT8716F  Super I/O chip w/LPC interface
@@ -83,7 +84,7 @@ enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8732,
 	     it8736, it8738,
 	     it8771, it8772, it8781, it8782, it8783, it8786, it8790,
 	     it8792, it8603, it8606, it8607, it8613, it8620, it8622, it8625,
-	     it8628, it8655, it8665, it8686, it8528 };
+	     it8628, it8655, it8665, it8686, it8528, it8688 };
 
 static unsigned short force_id;
 module_param(force_id, ushort, 0000);
@@ -200,6 +201,7 @@ static inline void superio_exit(int ioreg, bool doexit)
 #define IT8665E_DEVID 0x8665
 #define IT8686E_DEVID 0x8686
 #define IT8528E_DEVID 0x8528
+#define IT8688E_DEVID 0x8688
 
 /* Logical device 4 (Environmental Monitor) registers */
 #define IT87_ACT_REG		0x30
@@ -742,6 +744,18 @@ static const struct it87_devices it87_devices[] = {
 		.num_temp_map = 7,
 		.smbus_bitmap = BIT(1) | BIT(2),
 	},
+	[it8688] = {
+		.name = "it8688",
+		.model = "IT8688E",
+		.features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
+		  | FEAT_SIX_FANS | FEAT_NEW_TEMPMAP
+		  | FEAT_IN7_INTERNAL | FEAT_SIX_PWM | FEAT_PWM_FREQ2
+		  | FEAT_SIX_TEMP | FEAT_BANK_SEL | FEAT_SCALING | FEAT_AVCC3,
+		.num_temp_limit = 6,
+		.num_temp_offset = 6,
+		.num_temp_map = 7,
+		.smbus_bitmap = BIT(1) | BIT(2),
+	},
 };
 
 #define has_16bit_fans(data)	((data)->features & FEAT_16BIT_FANS)
@@ -1481,6 +1495,7 @@ static int get_temp_type(struct it87_data *data, int index)
 
 		switch (data->type) {
 		case it8686:
+		case it8688:
 			if (src1 < 9)
 				type = temp_types_8686[index][src1];
 			break;
@@ -3127,6 +3142,9 @@ static int __init it87_find(int sioaddr, unsigned short *address,
 	case IT8686E_DEVID:
 		sio_data->type = it8686;
 		break;
+	case IT8688E_DEVID:
+		sio_data->type = it8688;
+		break;
 	case 0xffff:	/* No device at all */
 		goto exit;
 	default:
@@ -3343,7 +3361,8 @@ static int __init it87_find(int sioaddr, unsigned short *address,
 		sio_data->beep_pin = superio_inb(sioaddr,
 						 IT87_SIO_BEEP_PIN_REG) & 0x3f;
 	} else if (sio_data->type == it8620 || sio_data->type == it8628 ||
-		   sio_data->type == it8686 || sio_data->type == it8528) {
+		   sio_data->type == it8686 || sio_data->type == it8528 || 
+		   sio_data->type == it8688) {
 		int reg;
 
 		superio_select(sioaddr, GPIO);
@@ -3388,7 +3407,7 @@ static int __init it87_find(int sioaddr, unsigned short *address,
 		reg = superio_inb(sioaddr, IT87_SIO_PINX2_REG);
 		if (reg & BIT(0)) {
 			/* For it8686, the bit just enables AVCC3 */
-			if (sio_data->type != it8686)
+			if (sio_data->type != it8686 && sio_data->type != it8688)
 				sio_data->internal |= BIT(0);
 		} else {
 			sio_data->internal &= ~BIT(3);
@@ -3765,6 +3784,7 @@ static void it87_init_regs(struct platform_device *pdev)
 	case it8528:
 	case it8628:
 	case it8686:
+	case it8688:
 		data->REG_FAN = IT87_REG_FAN;
 		data->REG_FANX = IT87_REG_FANX;
 		data->REG_FAN_MIN = IT87_REG_FAN_MIN;
@@ -3895,6 +3915,7 @@ static void it87_init_device(struct platform_device *pdev)
 		case it8528:
 		case it8628:
 		case it8686:
+		case it8688:
 			if (tmp & BIT(2))
 				data->has_fan |= BIT(5); /* fan6 enabled */
 			break;
@@ -3917,6 +3938,7 @@ static void it87_init_device(struct platform_device *pdev)
 		switch (data->type) {
 		case it8620:
 		case it8686:
+		case it8688:
 			tmp = data->read(data, IT87_REG_FAN_DIV);
 			if (!(tmp & BIT(3)))
 				sio_data->skip_pwm |= BIT(5);