[PATCH v2 3/4] iio: temperature: tmp117: add TI TMP116 support

Marco Felsch
2022-12-21T09:28:32Z

The TMP116 is the predecessor of the TMP117. The TMP116 don't support
custom offset calibration data, instead this register is used as generic
EEPROM storage as well.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
---
v2:
- no changes

drivers/iio/temperature/tmp117.c | 40 ++++++++++++++++++++++----------
1 file changed, 28 insertions(+), 12 deletions(-)

diff --git a/drivers/iio/temperature/tmp117.c b/drivers/iio/temperature/tmp117.c
index f9b8f2b570f6..468dafa6fa8e 100644
--- a/drivers/iio/temperature/tmp117.c
+++ b/drivers/iio/temperature/tmp117.c
@@ -31,9 +31,11 @@
#define TMP117_REG_DEVICE_ID 0xF

#define TMP117_RESOLUTION_10UC 78125
-#define TMP117_DEVICE_ID 0x0117
#define MICRODEGREE_PER_10MILLIDEGREE 10000

+#define TMP116_DEVICE_ID 0x1116
+#define TMP117_DEVICE_ID 0x0117
+
struct tmp117_data {
struct i2c_client *client;
s16 calibbias;
@@ -105,6 +107,13 @@ static const struct iio_chan_spec tmp117_channels[] = {
.type = IIO_TEMP,
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_SCALE),
+};
+
+static const struct iio_chan_spec tmp116_channels[] = {
+ {
+ .type = IIO_TEMP,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
},
};

@@ -118,27 +127,28 @@ static int tmp117_identify(struct i2c_client *client)
int dev_id;

dev_id = i2c_smbus_read_word_swapped(client, TMP117_REG_DEVICE_ID);
- if (dev_id < 0)
+ switch (dev_id) {
+ case TMP116_DEVICE_ID:
+ case TMP117_DEVICE_ID:
return dev_id;
- if (dev_id != TMP117_DEVICE_ID) {
- dev_err(&client->dev, "TMP117 not found\n");
+ default:
+ dev_err(&client->dev, "TMP116/117 not found\n");
return -ENODEV;
}
- return 0;
}

static int tmp117_probe(struct i2c_client *client)
{
struct tmp117_data *data;
struct iio_dev *indio_dev;
- int ret;
+ int dev_id;

if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA))
return -EOPNOTSUPP;

- ret = tmp117_identify(client);
- if (ret < 0)
- return ret;
+ dev_id = tmp117_identify(client);
+ if (dev_id < 0)
+ return dev_id;

indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
if (!indio_dev)
@@ -148,12 +158,18 @@ static int tmp117_probe(struct i2c_client *client)
data->client = client;
data->calibbias = 0;

- indio_dev->name = "tmp117";
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->info = &tmp117_info;

- indio_dev->channels = tmp117_channels;
- indio_dev->num_channels = ARRAY_SIZE(tmp117_channels);
+ if (dev_id == TMP117_DEVICE_ID) {
+ indio_dev->channels = tmp117_channels;
+ indio_dev->num_channels = ARRAY_SIZE(tmp117_channels);
+ indio_dev->name = "tmp117";
+ } else {
+ indio_dev->channels = tmp116_channels;
+ indio_dev->num_channels = ARRAY_SIZE(tmp116_channels);
+ indio_dev->name = "tmp116";
+ }

return devm_iio_device_register(&client->dev, indio_dev);
}
--
2.30.2