hwmon: Add support for the Winbond W83687THF

Add support for the Winbond W83687THF chip to the w83627hf hardware
monitoring driver. This new chip is almost similar to the already
supported W83627THF chip, except for VID and a few other minor
changes.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Adrian Bunk <bunk@stusta.de>

3 files changed, 66 insertions, 17 deletions

diff --git a/Documentation/hwmon/w83627hf b/Documentation/hwmon/w83627hf
index bbeaba680443..792231921241 100644
--- a/Documentation/hwmon/w83627hf
+++ b/Documentation/hwmon/w83627hf
@@ -18,6 +18,10 @@ Supported chips:
     Prefix: 'w83637hf'
     Addresses scanned: ISA address retrieved from Super I/O registers
     Datasheet: http://www.winbond.com/PDF/sheet/w83637hf.pdf
+  * Winbond W83687THF
+    Prefix: 'w83687thf'
+    Addresses scanned: ISA address retrieved from Super I/O registers
+    Datasheet: Provided by Winbond on request
 
 Authors:
         Frodo Looijaard <frodol@dds.nl>,
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 4cd56b456238..dddfbbbef696 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -462,13 +462,14 @@ config SENSORS_W83L785TS
 	  will be called w83l785ts.
 
 config SENSORS_W83627HF
-	tristate "Winbond W83627HF, W83627THF, W83637HF, W83697HF"
-	depends on HWMON && I2C && EXPERIMENTAL
+	tristate "Winbond W83627HF, W83627THF, W83637HF, W83687THF, W83697HF"
+	depends on HWMON && I2C
 	select I2C_ISA
 	select HWMON_VID
 	help
 	  If you say yes here you get support for the Winbond W836X7 series
-	  of sensor chips: the W83627HF, W83627THF, W83637HF, and the W83697HF
+	  of sensor chips: the W83627HF, W83627THF, W83637HF, W83687THF and
+	  W83697HF.
 
 	  This driver can also be built as a module.  If so, the module
 	  will be called w83627hf.
diff --git a/drivers/hwmon/w83627hf.c b/drivers/hwmon/w83627hf.c
index 7ea441d4da63..8679f378e19f 100644
--- a/drivers/hwmon/w83627hf.c
+++ b/drivers/hwmon/w83627hf.c
@@ -28,6 +28,7 @@
     w83627hf	9	3	2	3	0x20	0x5ca3	no	yes(LPC)
     w83627thf	7	3	3	3	0x90	0x5ca3	no	yes(LPC)
     w83637hf	7	3	3	3	0x80	0x5ca3	no	yes(LPC)
+    w83687thf	7	3	3	3	0x90	0x5ca3	no	yes(LPC)
     w83697hf	8	2	2	2	0x60	0x5ca3	no	yes(LPC)
 
     For other winbond chips, and for i2c support in the above chips,
@@ -62,7 +63,7 @@ MODULE_PARM_DESC(force_i2c,
 static unsigned short address;
 
 /* Insmod parameters */
-enum chips { any_chip, w83627hf, w83627thf, w83697hf, w83637hf };
+enum chips { any_chip, w83627hf, w83627thf, w83697hf, w83637hf, w83687thf };
 
 static int reset;
 module_param(reset, bool, 0);
@@ -100,6 +101,10 @@ static int VAL;		/* The value to read/write */
 #define W83627THF_GPIO5_IOSR	0xf3 /* w83627thf only */
 #define W83627THF_GPIO5_DR	0xf4 /* w83627thf only */
 
+#define W83687THF_VID_EN	0x29 /* w83687thf only */
+#define W83687THF_VID_CFG	0xF0 /* w83687thf only */
+#define W83687THF_VID_DATA	0xF1 /* w83687thf only */
+
 static inline void
 superio_outb(int reg, int val)
 {
@@ -138,6 +143,7 @@ superio_exit(void)
 #define W627THF_DEVID 0x82
 #define W697_DEVID 0x60
 #define W637_DEVID 0x70
+#define W687THF_DEVID 0x85
 #define WINB_ACT_REG 0x30
 #define WINB_BASE_REG 0x60
 /* Constants specified below */
@@ -201,11 +207,11 @@ superio_exit(void)
 #define W83627HF_REG_PWM1 0x5A
 #define W83627HF_REG_PWM2 0x5B
 
-#define W83627THF_REG_PWM1		0x01	/* 697HF and 637HF too */
-#define W83627THF_REG_PWM2		0x03	/* 697HF and 637HF too */
-#define W83627THF_REG_PWM3		0x11	/* 637HF too */
+#define W83627THF_REG_PWM1		0x01	/* 697HF/637HF/687THF too */
+#define W83627THF_REG_PWM2		0x03	/* 697HF/637HF/687THF too */
+#define W83627THF_REG_PWM3		0x11	/* 637HF/687THF too */
 
-#define W83627THF_REG_VRM_OVT_CFG 	0x18	/* 637HF too */
+#define W83627THF_REG_VRM_OVT_CFG 	0x18	/* 637HF/687THF too */
 
 static const u8 regpwm_627hf[] = { W83627HF_REG_PWM1, W83627HF_REG_PWM2 };
 static const u8 regpwm[] = { W83627THF_REG_PWM1, W83627THF_REG_PWM2,
@@ -318,7 +324,7 @@ struct w83627hf_data {
 				   Default = 3435.
 				   Other Betas unimplemented */
 	u8 vrm;
-	u8 vrm_ovt;		/* Register value, 627thf & 637hf only */
+	u8 vrm_ovt;		/* Register value, 627THF/637HF/687THF only */
 };
 
 
@@ -413,7 +419,8 @@ static ssize_t show_in_0(struct w83627hf_data *data, char *buf, u8 reg)
 	long in0;
 
 	if ((data->vrm_ovt & 0x01) &&
-		(w83627thf == data->type || w83637hf == data->type))
+		(w83627thf == data->type || w83637hf == data->type
+		 || w83687thf == data->type))
 
 		/* use VRM9 calculation */
 		in0 = (long)((reg * 488 + 70000 + 50) / 100);
@@ -454,7 +461,8 @@ static ssize_t store_regs_in_min0(struct device *dev, struct device_attribute *a
 	down(&data->update_lock);
 	
 	if ((data->vrm_ovt & 0x01) &&
-		(w83627thf == data->type || w83637hf == data->type))
+		(w83627thf == data->type || w83637hf == data->type
+		 || w83687thf == data->type))
 
 		/* use VRM9 calculation */
 		data->in_min[0] =
@@ -481,7 +489,8 @@ static ssize_t store_regs_in_max0(struct device *dev, struct device_attribute *a
 	down(&data->update_lock);
 
 	if ((data->vrm_ovt & 0x01) &&
-		(w83627thf == data->type || w83637hf == data->type))
+		(w83627thf == data->type || w83637hf == data->type
+		 || w83687thf == data->type))
 		
 		/* use VRM9 calculation */
 		data->in_max[0] =
@@ -980,7 +989,8 @@ static int __init w83627hf_find(int sioaddr, unsigned short *addr)
 	if(val != W627_DEVID &&
 	   val != W627THF_DEVID &&
 	   val != W697_DEVID &&
-	   val != W637_DEVID) {
+	   val != W637_DEVID &&
+	   val != W687THF_DEVID) {
 		superio_exit();
 		return -ENODEV;
 	}
@@ -1034,6 +1044,8 @@ static int w83627hf_detect(struct i2c_adapter *adapter)
 		kind = w83627thf;
 	else if(val == W637_DEVID)
 		kind = w83637hf;
+	else if (val == W687THF_DEVID)
+		kind = w83687thf;
 	else {
 		dev_info(&adapter->dev,
 			 "Unsupported chip (dev_id=0x%02X).\n", val);
@@ -1071,6 +1083,8 @@ static int w83627hf_detect(struct i2c_adapter *adapter)
 		client_name = "w83697hf";
 	} else if (kind == w83637hf) {
 		client_name = "w83637hf";
+	} else if (kind == w83687thf) {
+		client_name = "w83687thf";
 	}
 
 	/* Fill in the remaining client fields and put into the global list */
@@ -1106,7 +1120,7 @@ static int w83627hf_detect(struct i2c_adapter *adapter)
 	device_create_file_in(new_client, 2);
 	device_create_file_in(new_client, 3);
 	device_create_file_in(new_client, 4);
-	if (kind != w83627thf && kind != w83637hf) {
+	if (kind == w83627hf || kind == w83697hf) {
 		device_create_file_in(new_client, 5);
 		device_create_file_in(new_client, 6);
 	}
@@ -1139,7 +1153,7 @@ static int w83627hf_detect(struct i2c_adapter *adapter)
 
 	device_create_file_pwm(new_client, 1);
 	device_create_file_pwm(new_client, 2);
-	if (kind == w83627thf || kind == w83637hf)
+	if (kind == w83627thf || kind == w83637hf || kind == w83687thf)
 		device_create_file_pwm(new_client, 3);
 
 	device_create_file_sensor(new_client, 1);
@@ -1247,6 +1261,33 @@ exit:
 	return res;
 }
 
+static int w83687thf_read_vid(struct i2c_client *client)
+{
+	int res = 0xff;
+
+	superio_enter();
+	superio_select(W83627HF_LD_HWM);
+
+	/* Make sure these GPIO pins are enabled */
+	if (!(superio_inb(W83687THF_VID_EN) & (1 << 2))) {
+		dev_dbg(&client->dev, "VID disabled, no VID function\n");
+		goto exit;
+	}
+
+	/* Make sure the pins are configured for input */
+	if (!(superio_inb(W83687THF_VID_CFG) & (1 << 4))) {
+		dev_dbg(&client->dev, "VID configured as output, "
+			"no VID function\n");
+		goto exit;
+	}
+
+	res = superio_inb(W83687THF_VID_DATA) & 0x3f;
+
+exit:
+	superio_exit();
+	return res;
+}
+
 static int w83627hf_write_value(struct i2c_client *client, u16 reg, u16 value)
 {
 	struct w83627hf_data *data = i2c_get_clientdata(client);
@@ -1324,10 +1365,13 @@ static void w83627hf_init_client(struct i2c_client *client)
 		data->vid = (lo & 0x0f) | ((hi & 0x01) << 4);
 	} else if (w83627thf == data->type) {
 		data->vid = w83627thf_read_gpio5(client);
+	} else if (w83687thf == data->type) {
+		data->vid = w83687thf_read_vid(client);
 	}
 
 	/* Read VRM & OVT Config only once */
-	if (w83627thf == data->type || w83637hf == data->type) {
+	if (w83627thf == data->type || w83637hf == data->type
+	 || w83687thf == data->type) {
 		data->vrm_ovt = 
 			w83627hf_read_value(client, W83627THF_REG_VRM_OVT_CFG);
 	}
@@ -1394,7 +1438,7 @@ static struct w83627hf_data *w83627hf_update_device(struct device *dev)
 		for (i = 0; i <= 8; i++) {
 			/* skip missing sensors */
 			if (((data->type == w83697hf) && (i == 1)) ||
-			    ((data->type == w83627thf || data->type == w83637hf)
+			    ((data->type != w83627hf && data->type != w83697hf)
 			    && (i == 5 || i == 6)))
 				continue;
 			data->in[i] =