hwmon: (it87) Add support for IT8620E

IT8620E is mostly compatible to IT7828F. Add generic support for it.

IT8620E supports up to 6 fan tachometers and 6 pwm controls.
Support for the 6th tachometer and for the additional pwm controls
are addded in separate patches.

Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

1 files changed, 42 insertions, 1 deletions

diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 80580cdf9a15..4e4db72d38e8 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -11,6 +11,7 @@
  *  similar parts.  The other devices are supported by different drivers.
  *
  *  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
  *            IT8705F  Super I/O chip w/LPC interface
  *            IT8712F  Super I/O chip w/LPC interface
@@ -69,7 +70,7 @@
 #define DRVNAME "it87"
 
 enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8771,
-             it8772, it8781, it8782, it8783, it8786, it8790, it8603 };
+             it8772, it8781, it8782, it8783, it8786, it8790, it8603, it8620 };
 
 static unsigned short force_id;
 module_param(force_id, ushort, 0);
@@ -155,12 +156,14 @@ static inline void superio_exit(void)
 #define IT8786E_DEVID 0x8786
 #define IT8790E_DEVID 0x8790
 #define IT8603E_DEVID 0x8603
+#define IT8620E_DEVID 0x8620
 #define IT8623E_DEVID 0x8623
 #define IT87_ACT_REG  0x30
 #define IT87_BASE_REG 0x60
 
 /* Logical device 7 registers (IT8712F and later) */
 #define IT87_SIO_GPIO1_REG      0x25
+#define IT87_SIO_GPIO2_REG      0x26
 #define IT87_SIO_GPIO3_REG      0x27
 #define IT87_SIO_GPIO5_REG      0x29
 #define IT87_SIO_PINX1_REG      0x2a    /* Pin selection */
@@ -375,6 +378,14 @@ static const struct it87_devices it87_devices[] = {
                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
                 .peci_mask = 0x07,
         },
+        [it8620] = {
+                .name = "it8620",
+                .suffix = "E",
+                .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
+                  | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_FIVE_FANS
+                  | FEAT_IN7_INTERNAL,
+                .peci_mask = 0x07,
+        },
 };
 
 #define has_16bit_fans(data)    ((data)->features & FEAT_16BIT_FANS)
@@ -1850,6 +1861,9 @@ static int __init it87_find(unsigned short *address,
         case IT8623E_DEVID:
                 sio_data->type = it8603;
                 break;
+        case IT8620E_DEVID:
+                sio_data->type = it8620;
+                break;
         case 0xffff:    /* No device at all */
                 goto exit;
         default:
@@ -1985,6 +1999,33 @@ static int __init it87_find(unsigned short *address,
                 sio_data->internal |= (1 << 3); /* in9 is AVCC */
 
                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
+        } else if (sio_data->type == it8620) {
+                int reg;
+
+                superio_select(GPIO);
+
+                /* Check for fan4, fan5 */
+                reg = superio_inb(IT87_SIO_GPIO2_REG);
+                if (!(reg & (1 << 5)))
+                        sio_data->skip_fan |= (1 << 3);
+                if (!(reg & (1 << 4)))
+                        sio_data->skip_fan |= (1 << 4);
+
+                /* Check for pwm3, fan3 */
+                reg = superio_inb(IT87_SIO_GPIO3_REG);
+                if (reg & (1 << 6))
+                        sio_data->skip_pwm |= (1 << 2);
+                if (reg & (1 << 7))
+                        sio_data->skip_fan |= (1 << 2);
+
+                /* Check for pwm2, fan2 */
+                reg = superio_inb(IT87_SIO_GPIO5_REG);
+                if (reg & (1 << 1))
+                        sio_data->skip_pwm |= (1 << 1);
+                if (reg & (1 << 2))
+                        sio_data->skip_fan |= (1 << 1);
+
+                sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
         } else {
                 int reg;
                 bool uart6;