hwmon: (adt7475) Add support for the ADT7473

Add support for the ADT7473 to the adt7475 driver, and mark the
adt7473 driver for removal. The ADT7473 and ADT7475 chips are almost
the same chip and essentially compatible, so there's no point in
having separate drivers for them.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: "Mark M. Hoffman" <mhoffman@lightlink.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Jordan Crouse <jordan@cosmicpenguin.net>
Cc: "Darrick J. Wong" <djwong@us.ibm.com>

3 files changed, 26 insertions, 12 deletions

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index edf8febb5bc4..5b2eaff47900 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -191,21 +191,25 @@ config SENSORS_ADT7470
           will be called adt7470.
 
 config SENSORS_ADT7473
-        tristate "Analog Devices ADT7473"
+        tristate "Analog Devices ADT7473 (DEPRECATED)"
         depends on I2C && EXPERIMENTAL
+        select SENSORS_ADT7475
         help
           If you say yes here you get support for the Analog Devices
           ADT7473 temperature monitoring chips.
 
+          This driver is deprecated, you should use the adt7475 driver
+          instead.
+
           This driver can also be built as a module. If so, the module
           will be called adt7473.
 
 config SENSORS_ADT7475
-        tristate "Analog Devices ADT7475"
+        tristate "Analog Devices ADT7473 and ADT7475"
         depends on I2C && EXPERIMENTAL
         help
           If you say yes here you get support for the Analog Devices
-          ADT7475 hardware monitoring chips.
+          ADT7473 and ADT7475 hardware monitoring chips.
 
           This driver can also be build as a module.  If so, the module
           will be called adt7475.
diff --git a/drivers/hwmon/adt7473.c b/drivers/hwmon/adt7473.c
index 97ef50833f64..aea244db974e 100644
--- a/drivers/hwmon/adt7473.c
+++ b/drivers/hwmon/adt7473.c
@@ -174,7 +174,6 @@ static const struct i2c_device_id adt7473_id[] = {
         { "adt7473", adt7473 },
         { }
 };
-MODULE_DEVICE_TABLE(i2c, adt7473_id);
 
 static struct i2c_driver adt7473_driver = {
         .class          = I2C_CLASS_HWMON,
@@ -1166,6 +1165,8 @@ static int adt7473_remove(struct i2c_client *client)
 
 static int __init adt7473_init(void)
 {
+        pr_notice("The adt7473 driver is deprecated, please use the adt7475 "
+                  "driver instead\n");
         return i2c_add_driver(&adt7473_driver);
 }
 
diff --git a/drivers/hwmon/adt7475.c b/drivers/hwmon/adt7475.c
index 41d3e38f9ce1..fba2f016e4d8 100644
--- a/drivers/hwmon/adt7475.c
+++ b/drivers/hwmon/adt7475.c
@@ -113,11 +113,12 @@
 #define TEMP_OFFSET_REG(idx) (REG_TEMP_OFFSET_BASE + (idx))
 #define TEMP_TRANGE_REG(idx) (REG_TEMP_TRANGE_BASE + (idx))
 
-static unsigned short normal_i2c[] = { 0x2e, I2C_CLIENT_END };
+static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
 
-I2C_CLIENT_INSMOD_1(adt7475);
+I2C_CLIENT_INSMOD_2(adt7473, adt7475);
 
 static const struct i2c_device_id adt7475_id[] = {
+        { "adt7473", adt7473 },
         { "adt7475", adt7475 },
         { }
 };
@@ -970,19 +971,27 @@ static int adt7475_detect(struct i2c_client *client, int kind,
                           struct i2c_board_info *info)
 {
         struct i2c_adapter *adapter = client->adapter;
+        int vendid, devid;
+        const char *name;
 
         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
                 return -ENODEV;
 
-        if (adt7475_read(REG_VENDID) != 0x41 ||
-            adt7475_read(REG_DEVID) != 0x75) {
-                dev_err(&adapter->dev,
-                        "Couldn't detect a adt7475 part at 0x%02x\n",
-                        (unsigned int)client->addr);
+        vendid = adt7475_read(REG_VENDID);
+        devid = adt7475_read(REG_DEVID);
+
+        if (vendid == 0x41 && devid == 0x73)
+                name = "adt7473";
+        else if (vendid == 0x41 && devid == 0x75 && client->addr == 0x2e)
+                name = "adt7475";
+        else {
+                dev_dbg(&adapter->dev,
+                        "Couldn't detect an ADT7473 or ADT7475 part at "
+                        "0x%02x\n", (unsigned int)client->addr);
                 return -ENODEV;
         }
 
-        strlcpy(info->type, adt7475_id[0].name, I2C_NAME_SIZE);
+        strlcpy(info->type, name, I2C_NAME_SIZE);
 
         return 0;
 }