OpenWrt – Blame information for rev 4

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4 office 1 From 694f9bfb8efaef8a33e8992015ff9d0866faf4a2 Mon Sep 17 00:00:00 2001
2 From: Christian Lamparter <chunkeey@gmail.com>
3 Date: Sun, 17 Dec 2017 17:27:15 +0100
4 Subject: [PATCH 1/2] hwmon: tc654 add detection routine
5  
6 This patch adds a detection routine for the TC654/TC655
7 chips. Both IDs are listed in the Datasheet.
8  
9 Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
10 ---
11 drivers/hwmon/tc654.c | 29 +++++++++++++++++++++++++++++
12 1 file changed, 29 insertions(+)
13  
14 --- a/drivers/hwmon/tc654.c
15 +++ b/drivers/hwmon/tc654.c
16 @@ -64,6 +64,11 @@ enum tc654_regs {
17 /* Register data is read (and cached) at most once per second. */
18 #define TC654_UPDATE_INTERVAL HZ
19  
20 +/* Manufacturer and Version Identification Register Values */
21 +#define TC654_MFR_ID_MICROCHIP 0x84
22 +#define TC654_VER_ID 0x00
23 +#define TC655_VER_ID 0x01
24 +
25 struct tc654_data {
26 struct i2c_client *client;
27  
28 @@ -497,6 +502,29 @@ static const struct i2c_device_id tc654_
29 {}
30 };
31  
32 +static int
33 +tc654_detect(struct i2c_client *new_client, struct i2c_board_info *info)
34 +{
35 + struct i2c_adapter *adapter = new_client->adapter;
36 + int manufacturer, product;
37 +
38 + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
39 + return -ENODEV;
40 +
41 + manufacturer = i2c_smbus_read_byte_data(new_client, TC654_REG_MFR_ID);
42 + if (manufacturer != TC654_MFR_ID_MICROCHIP)
43 + return -ENODEV;
44 +
45 + product = i2c_smbus_read_byte_data(new_client, TC654_REG_VER_ID);
46 + if (!((product == TC654_VER_ID) || (product == TC655_VER_ID)))
47 + return -ENODEV;
48 +
49 + strlcpy(info->type, product == TC654_VER_ID ? "tc654" : "tc655",
50 + I2C_NAME_SIZE);
51 + return 0;
52 +}
53 +
54 +
55 MODULE_DEVICE_TABLE(i2c, tc654_id);
56  
57 static struct i2c_driver tc654_driver = {
58 @@ -505,6 +533,7 @@ static struct i2c_driver tc654_driver =
59 },
60 .probe = tc654_probe,
61 .id_table = tc654_id,
62 + .detect = tc654_detect,
63 };
64  
65 module_i2c_driver(tc654_driver);