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- From 694f9bfb8efaef8a33e8992015ff9d0866faf4a2 Mon Sep 17 00:00:00 2001
- From: Christian Lamparter <[email protected]>
- Date: Sun, 17 Dec 2017 17:27:15 +0100
- Subject: [PATCH 1/2] hwmon: tc654 add detection routine
- This patch adds a detection routine for the TC654/TC655
- chips. Both IDs are listed in the Datasheet.
- Signed-off-by: Christian Lamparter <[email protected]>
- ---
- drivers/hwmon/tc654.c | 29 +++++++++++++++++++++++++++++
- 1 file changed, 29 insertions(+)
- --- a/drivers/hwmon/tc654.c
- +++ b/drivers/hwmon/tc654.c
- @@ -55,6 +55,11 @@ enum tc654_regs {
- /* Register data is read (and cached) at most once per second. */
- #define TC654_UPDATE_INTERVAL HZ
-
- +/* Manufacturer and Version Identification Register Values */
- +#define TC654_MFR_ID_MICROCHIP 0x84
- +#define TC654_VER_ID 0x00
- +#define TC655_VER_ID 0x01
- +
- struct tc654_data {
- struct i2c_client *client;
-
- @@ -481,6 +486,29 @@ static const struct i2c_device_id tc654_
- {}
- };
-
- +static int
- +tc654_detect(struct i2c_client *new_client, struct i2c_board_info *info)
- +{
- + struct i2c_adapter *adapter = new_client->adapter;
- + int manufacturer, product;
- +
- + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
- + return -ENODEV;
- +
- + manufacturer = i2c_smbus_read_byte_data(new_client, TC654_REG_MFR_ID);
- + if (manufacturer != TC654_MFR_ID_MICROCHIP)
- + return -ENODEV;
- +
- + product = i2c_smbus_read_byte_data(new_client, TC654_REG_VER_ID);
- + if (!((product == TC654_VER_ID) || (product == TC655_VER_ID)))
- + return -ENODEV;
- +
- + strlcpy(info->type, product == TC654_VER_ID ? "tc654" : "tc655",
- + I2C_NAME_SIZE);
- + return 0;
- +}
- +
- +
- MODULE_DEVICE_TABLE(i2c, tc654_id);
-
- static struct i2c_driver tc654_driver = {
- @@ -489,6 +517,7 @@ static struct i2c_driver tc654_driver =
- },
- .probe_new = tc654_probe,
- .id_table = tc654_id,
- + .detect = tc654_detect,
- };
-
- module_i2c_driver(tc654_driver);
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