hwmon: (it87) Add support for IT8771E and IT8772E

Assume that IT8771E and IT8772E are fully compatible with IT8728F.

IT8771E support contributed by Kelly Anderson.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Jean Delvare <khali@linux-fr.org>

2 files changed, 37 insertions, 5 deletions

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index ef5757265f78..3588b2a0915c 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -506,7 +506,8 @@ config SENSORS_IT87
         help
           If you say yes here you get support for ITE IT8705F, IT8712F,
           IT8716F, IT8718F, IT8720F, IT8721F, IT8726F, IT8728F, IT8758E,
-          IT8782F, and IT8783E/F sensor chips, and the SiS950 clone.
+          IT8771E, IT8772E, IT8782F, and IT8783E/F sensor chips, and the
+          SiS950 clone.
 
           This driver can also be built as a module.  If so, the module
           will be called it87.
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 29632e849285..37fc980fde24 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -19,6 +19,8 @@
  *            IT8726F  Super I/O chip w/LPC interface
  *            IT8728F  Super I/O chip w/LPC interface
  *            IT8758E  Super I/O chip w/LPC interface
+ *            IT8771E  Super I/O chip w/LPC interface
+ *            IT8772E  Super I/O chip w/LPC interface
  *            IT8782F  Super I/O chip w/LPC interface
  *            IT8783E/F Super I/O chip w/LPC interface
  *            Sis950   A clone of the IT8705F
@@ -61,8 +63,8 @@
 
 #define DRVNAME "it87"
 
-enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8782,
-             it8783 };
+enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8771,
+             it8772, it8782, it8783 };
 
 static unsigned short force_id;
 module_param(force_id, ushort, 0);
@@ -140,6 +142,8 @@ static inline void superio_exit(void)
 #define IT8721F_DEVID 0x8721
 #define IT8726F_DEVID 0x8726
 #define IT8728F_DEVID 0x8728
+#define IT8771E_DEVID 0x8771
+#define IT8772E_DEVID 0x8772
 #define IT8782F_DEVID 0x8782
 #define IT8783E_DEVID 0x8783
 #define IT87_ACT_REG  0x30
@@ -281,6 +285,24 @@ static const struct it87_devices it87_devices[] = {
                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
                 .peci_mask = 0x07,
         },
+        [it8771] = {
+                .name = "it8771",
+                .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
+                  | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
+                                        /* PECI: guesswork */
+                                        /* 12mV ADC (OHM) */
+                                        /* 16 bit fans (OHM) */
+                .peci_mask = 0x07,
+        },
+        [it8772] = {
+                .name = "it8772",
+                .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
+                  | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
+                                        /* PECI (coreboot) */
+                                        /* 12mV ADC (HWSensors4, OHM) */
+                                        /* 16 bit fans (HWSensors4, OHM) */
+                .peci_mask = 0x07,
+        },
         [it8782] = {
                 .name = "it8782",
                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
@@ -1708,6 +1730,12 @@ static int __init it87_find(unsigned short *address,
         case IT8728F_DEVID:
                 sio_data->type = it8728;
                 break;
+        case IT8771E_DEVID:
+                sio_data->type = it8771;
+                break;
+        case IT8772E_DEVID:
+                sio_data->type = it8772;
+                break;
         case IT8782F_DEVID:
                 sio_data->type = it8782;
                 break;
@@ -1825,10 +1853,11 @@ static int __init it87_find(unsigned short *address,
 
                 reg = superio_inb(IT87_SIO_GPIO3_REG);
                 if (sio_data->type == it8721 || sio_data->type == it8728 ||
+                    sio_data->type == it8771 || sio_data->type == it8772 ||
                     sio_data->type == it8782) {
                         /*
                          * IT8721F/IT8758E, and IT8782F don't have VID pins
-                         * at all, not sure about the IT8728F.
+                         * at all, not sure about the IT8728F and compatibles.
                          */
                         sio_data->skip_vid = 1;
                 } else {
@@ -1882,7 +1911,9 @@ static int __init it87_find(unsigned short *address,
                 if (reg & (1 << 0))
                         sio_data->internal |= (1 << 0);
                 if ((reg & (1 << 1)) || sio_data->type == it8721 ||
-                    sio_data->type == it8728)
+                    sio_data->type == it8728 ||
+                    sio_data->type == it8771 ||
+                    sio_data->type == it8772)
                         sio_data->internal |= (1 << 1);
 
                 /*