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65 lines
1.8 KiB
65 lines
1.8 KiB
From 694f9bfb8efaef8a33e8992015ff9d0866faf4a2 Mon Sep 17 00:00:00 2001
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From: Christian Lamparter <chunkeey@gmail.com>
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Date: Sun, 17 Dec 2017 17:27:15 +0100
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Subject: [PATCH 1/2] hwmon: tc654 add detection routine
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This patch adds a detection routine for the TC654/TC655
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chips. Both IDs are listed in the Datasheet.
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Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
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---
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drivers/hwmon/tc654.c | 29 +++++++++++++++++++++++++++++
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1 file changed, 29 insertions(+)
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--- a/drivers/hwmon/tc654.c
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+++ b/drivers/hwmon/tc654.c
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@@ -64,6 +64,11 @@ enum tc654_regs {
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/* Register data is read (and cached) at most once per second. */
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#define TC654_UPDATE_INTERVAL HZ
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+/* Manufacturer and Version Identification Register Values */
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+#define TC654_MFR_ID_MICROCHIP 0x84
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+#define TC654_VER_ID 0x00
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+#define TC655_VER_ID 0x01
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+
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struct tc654_data {
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struct i2c_client *client;
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@@ -497,6 +502,29 @@ static const struct i2c_device_id tc654_
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{}
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};
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+static int
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+tc654_detect(struct i2c_client *new_client, struct i2c_board_info *info)
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+{
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+ struct i2c_adapter *adapter = new_client->adapter;
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+ int manufacturer, product;
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+
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+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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+ return -ENODEV;
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+
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+ manufacturer = i2c_smbus_read_byte_data(new_client, TC654_REG_MFR_ID);
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+ if (manufacturer != TC654_MFR_ID_MICROCHIP)
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+ return -ENODEV;
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+
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+ product = i2c_smbus_read_byte_data(new_client, TC654_REG_VER_ID);
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+ if (!((product == TC654_VER_ID) || (product == TC655_VER_ID)))
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+ return -ENODEV;
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+
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+ strlcpy(info->type, product == TC654_VER_ID ? "tc654" : "tc655",
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+ I2C_NAME_SIZE);
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+ return 0;
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+}
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+
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+
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MODULE_DEVICE_TABLE(i2c, tc654_id);
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static struct i2c_driver tc654_driver = {
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@@ -505,6 +533,7 @@ static struct i2c_driver tc654_driver =
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},
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.probe = tc654_probe,
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.id_table = tc654_id,
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+ .detect = tc654_detect,
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};
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module_i2c_driver(tc654_driver);
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