hwmon: (it87) Add support for IT8628E

IT8628E is functionally identical to IT8620E.
Tested-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Documentation/hwmon/it87

@@ -9,6 +9,9 @@ Supported chips:
   * IT8620E
     Prefix: 'it8620'
     Addresses scanned: from Super I/O config space (8 I/O ports)
+  * IT8628E
+    Prefix: 'it8628'
+    Addresses scanned: from Super I/O config space (8 I/O ports)
     Datasheet: Not publicly available
   * IT8705F
     Prefix: 'it87'
@@ -114,8 +117,8 @@ motherboard models.
 Description
 -----------
 
-This driver implements support for the IT8603E, IT8620E, IT8623E, IT8705F,
-IT8712F, IT8716F, IT8718F, IT8720F, IT8721F, IT8726F, IT8728F, IT8732F,
+This driver implements support for the IT8603E, IT8620E, IT8623E, IT8628E,
+IT8705F, IT8712F, IT8716F, IT8718F, IT8720F, IT8721F, IT8726F, IT8728F, IT8732F,
 IT8758E, IT8771E, IT8772E, IT8781F, IT8782F, IT8783E/F, IT8786E, IT8790E, and
 SiS950 chips.
 
@@ -158,8 +161,8 @@ The IT8603E/IT8623E is a custom design, hardware monitoring part is similar to
 IT8728F. It only supports 3 fans, 16-bit fan mode, and the full speed mode
 of the fan is not supported (value 0 of pwmX_enable).
 
-The IT8620E is another custom design, hardware monitoring part is similar to
-IT8728F. It only supports 16-bit fan mode.
+The IT8620E and IT8628E are custom designs, hardware monitoring part is similar
+to IT8728F. It only supports 16-bit fan mode. Both chips support up to 6 fans.
 
 The IT8790E supports up to 3 fans. 16-bit fan mode is always enabled.
 
@@ -187,8 +190,8 @@ of 0.016 volt.  IT8603E, IT8721F/IT8758E and IT8728F can measure between 0 and
 2.8 volts with a resolution of 0.0109 volt.  The battery voltage in8 does not
 have limit registers.
 
-On the IT8603E, IT8721F/IT8758E, IT8732F, IT8781F, IT8782F, and IT8783E/F, some
-voltage inputs are internal and scaled inside the chip:
+On the IT8603E, IT8620E, IT8628E, IT8721F/IT8758E, IT8732F, IT8781F, IT8782F,
+and IT8783E/F, some voltage inputs are internal and scaled inside the chip:
 * in3 (optional)
 * in7 (optional for IT8781F, IT8782F, and IT8783E/F)
 * in8 (always)

drivers/hwmon/Kconfig

@@ -621,7 +621,8 @@ config SENSORS_IT87
 	  If you say yes here you get support for ITE IT8705F, IT8712F, IT8716F,
 	  IT8718F, IT8720F, IT8721F, IT8726F, IT8728F, IT8732F, IT8758E,
 	  IT8771E, IT8772E, IT8781F, IT8782F, IT8783E/F, IT8786E, IT8790E,
-	  IT8603E, IT8620E, and IT8623E sensor chips, and the SiS950 clone.
+	  IT8603E, IT8620E, IT8623E, and IT8628E sensor chips, and the SiS950
+	  clone.
 
 	  This driver can also be built as a module.  If so, the module
 	  will be called it87.

drivers/hwmon/it87.c

@@ -13,6 +13,7 @@
  *  Supports: IT8603E  Super I/O chip w/LPC interface
  *            IT8620E  Super I/O chip w/LPC interface
  *            IT8623E  Super I/O chip w/LPC interface
+ *            IT8628E  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
@@ -69,7 +70,7 @@
 
 enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8732,
 	     it8771, it8772, it8781, it8782, it8783, it8786, it8790, it8603,
-	     it8620 };
+	     it8620, it8628 };
 
 static unsigned short force_id;
 module_param(force_id, ushort, 0);
@@ -160,6 +161,7 @@ static inline void superio_exit(int ioreg)
 #define IT8603E_DEVID 0x8603
 #define IT8620E_DEVID 0x8620
 #define IT8623E_DEVID 0x8623
+#define IT8628E_DEVID 0x8628
 #define IT87_ACT_REG  0x30
 #define IT87_BASE_REG 0x60
 
@@ -434,6 +436,15 @@ static const struct it87_devices it87_devices[] = {
 		  | FEAT_SIX_TEMP,
 		.peci_mask = 0x07,
 	},
+	[it8628] = {
+		.name = "it8628",
+		.suffix = "E",
+		.features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
+		  | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_SIX_FANS
+		  | FEAT_IN7_INTERNAL | FEAT_SIX_PWM | FEAT_PWM_FREQ2
+		  | FEAT_SIX_TEMP,
+		.peci_mask = 0x07,
+	},
 };
 
 #define has_16bit_fans(data)	((data)->features & FEAT_16BIT_FANS)
@@ -2402,6 +2413,9 @@ static int __init it87_find(int sioaddr, unsigned short *address,
 	case IT8620E_DEVID:
 		sio_data->type = it8620;
 		break;
+	case IT8628E_DEVID:
+		sio_data->type = it8628;
+		break;
 	case 0xffff:	/* No device at all */
 		goto exit;
 	default:
@@ -2546,7 +2560,7 @@ 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) {
+	} else if (sio_data->type == it8620 || sio_data->type == it8628) {
 		int reg;
 
 		superio_select(sioaddr, GPIO);