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authorThilo Cestonaro <thilo@cestona.ro>2016-08-16 14:07:53 +0300
committerGuenter Roeck <linux@roeck-us.net>2016-09-09 07:34:16 +0300
commit2d5aee433d9c5bb6075eb42039a21c5b3728d22d (patch)
treeb534bc94f26f2a6611eb5d75c9af0f1b5d5e0f35 /drivers/hwmon
parented42cfa881e1d8d9603b7cb872199e3c8e0d1b19 (diff)
downloadlinux-2d5aee433d9c5bb6075eb42039a21c5b3728d22d.tar.xz
hwmon: (ftsteutates) Add i2c detect functionality
Signed-off-by: Thilo Cestonaro <thilo@cestona.ro> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/ftsteutates.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/hwmon/ftsteutates.c b/drivers/hwmon/ftsteutates.c
index 48633e541dc3..0f0277e7aae5 100644
--- a/drivers/hwmon/ftsteutates.c
+++ b/drivers/hwmon/ftsteutates.c
@@ -36,6 +36,10 @@
#define FTS_EVENT_STATUS_REG 0x0006
#define FTS_GLOBAL_CONTROL_REG 0x0007
+#define FTS_DEVICE_DETECT_REG_1 0x0C
+#define FTS_DEVICE_DETECT_REG_2 0x0D
+#define FTS_DEVICE_DETECT_REG_3 0x0E
+
#define FTS_SENSOR_EVENT_REG 0x0010
#define FTS_FAN_EVENT_REG 0x0014
@@ -54,6 +58,8 @@
#define FTS_NO_TEMP_SENSORS 0x10
#define FTS_NO_VOLT_SENSORS 0x04
+static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
+
static struct i2c_device_id fts_id[] = {
{ "ftsteutates", 0 },
{ }
@@ -734,6 +740,42 @@ static const struct attribute_group *fts_attr_groups[] = {
/*****************************************************************************/
/* Module initialization / remove functions */
/*****************************************************************************/
+static int fts_detect(struct i2c_client *client,
+ struct i2c_board_info *info)
+{
+ int val;
+
+ /* detection works with revsion greater or equal to 0x2b */
+ val = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
+ if (val < 0x2b)
+ return -ENODEV;
+
+ /* Device Detect Regs must have 0x17 0x34 and 0x54 */
+ val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_1);
+ if (val != 0x17)
+ return -ENODEV;
+
+ val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_2);
+ if (val != 0x34)
+ return -ENODEV;
+
+ val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_3);
+ if (val != 0x54)
+ return -ENODEV;
+
+ /*
+ * 0x10 == Baseboard Management Controller, 0x01 == Teutates
+ * Device ID Reg needs to be 0x11
+ */
+ val = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
+ if (val != 0x11)
+ return -ENODEV;
+
+ strlcpy(info->type, fts_id[0].name, I2C_NAME_SIZE);
+ info->flags = 0;
+ return 0;
+}
+
static int fts_remove(struct i2c_client *client)
{
struct fts_data *data = dev_get_drvdata(&client->dev);
@@ -804,12 +846,15 @@ static int fts_probe(struct i2c_client *client, const struct i2c_device_id *id)
/* Module Details */
/*****************************************************************************/
static struct i2c_driver fts_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "ftsteutates",
},
.id_table = fts_id,
.probe = fts_probe,
.remove = fts_remove,
+ .detect = fts_detect,
+ .address_list = normal_i2c,
};
module_i2c_driver(fts_driver);