diff options
Diffstat (limited to 'drivers/hwmon/ds1621.c')
| -rw-r--r-- | drivers/hwmon/ds1621.c | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/drivers/hwmon/ds1621.c b/drivers/hwmon/ds1621.c index b5d80fb851d0..98adf77fdc84 100644 --- a/drivers/hwmon/ds1621.c +++ b/drivers/hwmon/ds1621.c @@ -10,8 +10,8 @@ * resolution, a thermal alarm output (Tout), and user-defined minimum * and maximum temperature thresholds (TH and TL). * - * The DS1625 and DS1721 are pin compatible with the DS1621 and similar - * in operation, with slight variations as noted in the device + * The DS1625, DS1631, and DS1721 are pin compatible with the DS1621 and + * similar in operation, with slight variations as noted in the device * datasheets (please refer to www.maximintegrated.com for specific * device information). * @@ -51,7 +51,7 @@ static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, I2C_CLIENT_END }; /* Supported devices */ -enum chips { ds1621, ds1625, ds1721 }; +enum chips { ds1621, ds1625, ds1631, ds1721 }; /* Insmod parameters */ static int polarity = -1; @@ -69,6 +69,10 @@ MODULE_PARM_DESC(polarity, "Output's polarity: 0 = active high, 1 = active low") * 7 6 5 4 3 2 1 0 * |Done|THF |TLF |NVB | 1 | 0 |POL |1SHOT| * + * - DS1631: + * 7 6 5 4 3 2 1 0 + * |Done|THF |TLF |NVB | R1 | R0 |POL |1SHOT| + * * - DS1721: * 7 6 5 4 3 2 1 0 * |Done| X | X | U | R1 | R0 |POL |1SHOT| @@ -139,8 +143,8 @@ static inline int DS1621_TEMP_FROM_REG(u16 reg) /* * TEMP: 0.001C/bit (-55C to +125C) * REG: - * - 1621, 1625: x = 0.5C - * - 1721: x = 0.0625C + * - 1621, 1625: 0.5C/bit + * - 1631, 1721: 0.0625C/bit * Assume highest resolution and let the bits fall where they may.. */ static inline u16 DS1621_TEMP_TO_REG(long temp) @@ -174,6 +178,7 @@ static void ds1621_init_client(struct i2c_client *client) data->update_interval = DS1625_CONVERSION_MAX; sreg = DS1621_COM_START; break; + case ds1631: case ds1721: resol = (new_conf & DS1621_REG_CONFIG_RESOL) >> DS1621_REG_CONFIG_RESOL_SHIFT; @@ -342,7 +347,7 @@ static umode_t ds1621_attribute_visible(struct kobject *kobj, struct ds1621_data *data = i2c_get_clientdata(client); if (attr == &dev_attr_update_interval.attr) - if (data->kind != ds1721) + if (data->kind == ds1621 || data->kind == ds1625) /* shhh, we're hiding update_interval */ return 0; return attr->mode; @@ -376,7 +381,14 @@ static int ds1621_detect(struct i2c_client *client, conf = i2c_smbus_read_byte_data(client, DS1621_REG_CONF); if (conf < 0 || conf & DS1621_REG_CONFIG_NVB) return -ENODEV; - /* The 7 lowest bits of a temperature should always be 0. */ + /* + * The ds1621 & ds1625 use 9-bit resolution, so the 7 lowest bits + * of the temperature should always be 0 (NOTE: The other chips + * have multi-resolution support, so if they have 9-bit resolution + * configured and the min/max temperature values set accordingly, + * then if not explicitly instantiated, they *will* appear as and + * emulate a ds1621 device). + */ for (i = 0; i < ARRAY_SIZE(DS1621_REG_TEMP); i++) { temp = i2c_smbus_read_word_data(client, DS1621_REG_TEMP[i]); if (temp < 0 || (temp & 0x7f00)) @@ -438,6 +450,7 @@ static int ds1621_remove(struct i2c_client *client) static const struct i2c_device_id ds1621_id[] = { { "ds1621", ds1621 }, { "ds1625", ds1625 }, + { "ds1631", ds1631 }, { "ds1721", ds1721 }, { } }; |