hwmon: (lm90) Add support for TI TMP451

TI TMP451 is mostly compatible with ADT7461, except for
local temperature low byte and max conversion rate.
Add support to the LM90 driver.

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

diff --git a/Documentation/hwmon/lm90 b/Documentation/hwmon/lm90
index b466974..ab81013 100644 (file)
--- a/Documentation/hwmon/lm90
+++ b/Documentation/hwmon/lm90
@@ -122,6 +122,12 @@ Supported chips:
     Prefix: 'g781'
     Addresses scanned: I2C 0x4c, 0x4d
     Datasheet: Not publicly available from GMT
+  * Texas Instruments TMP451
+    Prefix: 'tmp451'
+    Addresses scanned: I2C 0x4c
+    Datasheet: Publicly available at TI website
+               http://www.ti.com/litv/pdf/sbos686
+
 
 Author: Jean Delvare <khali@linux-fr.org>
 

diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
index 6b0a392..03735c4 100644 (file)
--- a/drivers/hwmon/lm90.c
+++ b/drivers/hwmon/lm90.c
@@ -60,6 +60,11 @@
  * This driver also supports the G781 from GMT. This device is compatible
  * with the ADM1032.
  *
+ * This driver also supports TMP451 from Texas Instruments. This device is
+ * supported in both compatibility and extended mode. It's mostly compatible
+ * with ADT7461 except for local temperature low byte register and max
+ * conversion rate.
+ *
  * Since the LM90 was the first chipset supported by this driver, most
  * comments will refer to this chipset, but are actually general and
  * concern all supported chipsets, unless mentioned otherwise.
@@ -111,7 +116,7 @@ static const unsigned short normal_i2c[] = {
        0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
 
 enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
-       max6646, w83l771, max6696, sa56004, g781 };
+       max6646, w83l771, max6696, sa56004, g781, tmp451 };
 
 /*
  * The LM90 registers
@@ -168,6 +173,9 @@ enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
 #define LM90_DEF_CONVRATE_RVAL 6       /* Def conversion rate register value */
 #define LM90_MAX_CONVRATE_MS   16000   /* Maximum conversion rate in ms */
 
+/* TMP451 registers */
+#define TMP451_REG_R_LOCAL_TEMPL       0x15
+
 /*
  * Device flags
  */
@@ -223,6 +231,7 @@ static const struct i2c_device_id lm90_id[] = {
        { "nct1008", adt7461 },
        { "w83l771", w83l771 },
        { "sa56004", sa56004 },
+       { "tmp451", tmp451 },
        { }
 };
 MODULE_DEVICE_TABLE(i2c, lm90_id);
@@ -311,6 +320,13 @@ static const struct lm90_params lm90_params[] = {
                .max_convrate = 9,
                .reg_local_ext = SA56004_REG_R_LOCAL_TEMPL,
        },
+       [tmp451] = {
+               .flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
+                 | LM90_HAVE_BROKEN_ALERT,
+               .alert_alarms = 0x7c,
+               .max_convrate = 9,
+               .reg_local_ext = TMP451_REG_R_LOCAL_TEMPL,
+       }
 };
 
 /*
@@ -746,7 +762,7 @@ static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
        struct lm90_data *data = lm90_update_device(dev);
        int temp;
 
-       if (data->kind == adt7461)
+       if (data->kind == adt7461 || data->kind == tmp451)
                temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
        else if (data->kind == max6646)
                temp = temp_from_u8(data->temp8[attr->index]);
@@ -790,7 +806,7 @@ static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
                val -= 16000;
 
        mutex_lock(&data->update_lock);
-       if (data->kind == adt7461)
+       if (data->kind == adt7461 || data->kind == tmp451)
                data->temp8[nr] = temp_to_u8_adt7461(data, val);
        else if (data->kind == max6646)
                data->temp8[nr] = temp_to_u8(val);
@@ -812,7 +828,7 @@ static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
        struct lm90_data *data = lm90_update_device(dev);
        int temp;
 
-       if (data->kind == adt7461)
+       if (data->kind == adt7461 || data->kind == tmp451)
                temp = temp_from_u16_adt7461(data, data->temp11[attr->index]);
        else if (data->kind == max6646)
                temp = temp_from_u16(data->temp11[attr->index]);
@@ -858,7 +874,7 @@ static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
                val -= 16000;
 
        mutex_lock(&data->update_lock);
-       if (data->kind == adt7461)
+       if (data->kind == adt7461 || data->kind == tmp451)
                data->temp11[index] = temp_to_u16_adt7461(data, val);
        else if (data->kind == max6646)
                data->temp11[index] = temp_to_u8(val) << 8;
@@ -887,7 +903,7 @@ static ssize_t show_temphyst(struct device *dev,
        struct lm90_data *data = lm90_update_device(dev);
        int temp;
 
-       if (data->kind == adt7461)
+       if (data->kind == adt7461 || data->kind == tmp451)
                temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
        else if (data->kind == max6646)
                temp = temp_from_u8(data->temp8[attr->index]);
@@ -915,7 +931,7 @@ static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy,
                return err;
 
        mutex_lock(&data->update_lock);
-       if (data->kind == adt7461)
+       if (data->kind == adt7461 || data->kind == tmp451)
                temp = temp_from_u8_adt7461(data, data->temp8[LOCAL_CRIT]);
        else if (data->kind == max6646)
                temp = temp_from_u8(data->temp8[LOCAL_CRIT]);
@@ -1348,6 +1364,19 @@ static int lm90_detect(struct i2c_client *client,
                 && (config1 & 0x3F) == 0x00
                 && convrate <= 0x08)
                        name = "g781";
+       } else
+       if (address == 0x4C
+        && man_id == 0x55) { /* Texas Instruments */
+               int local_ext;
+
+               local_ext = i2c_smbus_read_byte_data(client,
+                                                    TMP451_REG_R_LOCAL_TEMPL);
+
+               if (chip_id == 0x00 /* TMP451 */
+                && (config1 & 0x1B) == 0x00
+                && convrate <= 0x09
+                && (local_ext & 0x0F) == 0x00)
+                       name = "tmp451";
        }
 
        if (!name) { /* identification failed */
@@ -1409,7 +1438,7 @@ static void lm90_init_client(struct i2c_client *client)
        data->config_orig = config;
 
        /* Check Temperature Range Select */
-       if (data->kind == adt7461) {
+       if (data->kind == adt7461 || data->kind == tmp451) {
                if (config & 0x04)
                        data->flags |= LM90_FLAG_ADT7461_EXT;
        }