On Thu, Jul 28, 2022 at 3:32 PM Potin Lai <potin.lai.pt@xxxxxxxxx> wrote: > > Add manufacturer and device ID checking during probe, and skip the > checking if chip model not supported. > > Supported: > - HDC1000 > - HDC1010 > - HDC1050 > - HDC1080 > > Not supported: > - HDC1008 This one is okay now, thanks! Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx> > Signed-off-by: Potin Lai <potin.lai.pt@xxxxxxxxx> > --- > drivers/iio/humidity/hdc100x.c | 67 ++++++++++++++++++++++++++++------ > 1 file changed, 56 insertions(+), 11 deletions(-) > > diff --git a/drivers/iio/humidity/hdc100x.c b/drivers/iio/humidity/hdc100x.c > index 0d514818635cb..31f18cc1cf63c 100644 > --- a/drivers/iio/humidity/hdc100x.c > +++ b/drivers/iio/humidity/hdc100x.c > @@ -34,6 +34,23 @@ > #define HDC100X_REG_CONFIG_ACQ_MODE BIT(12) > #define HDC100X_REG_CONFIG_HEATER_EN BIT(13) > > +#define HDC100X_REG_MFR_ID 0xFE > +#define HDC100X_REG_DEV_ID 0xFF > + > +#define HDC100X_MFR_ID 0x5449 > + > +struct hdc100x_chip_data { > + bool support_mfr_check; > +}; > + > +static const struct hdc100x_chip_data hdc100x_chip_data = { > + .support_mfr_check = true, > +}; > + > +static const struct hdc100x_chip_data hdc1008_chip_data = { > + .support_mfr_check = false, > +}; > + > struct hdc100x_data { > struct i2c_client *client; > struct mutex lock; > @@ -351,8 +368,32 @@ static const struct iio_info hdc100x_info = { > .attrs = &hdc100x_attribute_group, > }; > > +static int hdc100x_read_mfr_id(struct i2c_client *client) > +{ > + return i2c_smbus_read_word_swapped(client, HDC100X_REG_MFR_ID); > +} > + > +static int hdc100x_read_dev_id(struct i2c_client *client) > +{ > + return i2c_smbus_read_word_swapped(client, HDC100X_REG_DEV_ID); > +} > + > +static bool is_valid_hdc100x(struct i2c_client *client) > +{ > + int mfr_id, dev_id; > + > + mfr_id = hdc100x_read_mfr_id(client); > + dev_id = hdc100x_read_dev_id(client); > + if (mfr_id == HDC100X_MFR_ID && > + (dev_id == 0x1000 || dev_id == 0x1050)) > + return true; > + > + return false; > +} > + > static int hdc100x_probe(struct i2c_client *client) > { > + const struct hdc100x_chip_data *chip_data; > struct iio_dev *indio_dev; > struct hdc100x_data *data; > int ret; > @@ -361,6 +402,10 @@ static int hdc100x_probe(struct i2c_client *client) > I2C_FUNC_SMBUS_BYTE | I2C_FUNC_I2C)) > return -EOPNOTSUPP; > > + chip_data = device_get_match_data(&client->dev); > + if (chip_data->support_mfr_check && !is_valid_hdc100x(client)) > + return -EINVAL; > + > indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); > if (!indio_dev) > return -ENOMEM; > @@ -396,22 +441,22 @@ static int hdc100x_probe(struct i2c_client *client) > } > > static const struct i2c_device_id hdc100x_id[] = { > - { "hdc100x", 0 }, > - { "hdc1000", 0 }, > - { "hdc1008", 0 }, > - { "hdc1010", 0 }, > - { "hdc1050", 0 }, > - { "hdc1080", 0 }, > + { "hdc100X", (kernel_ulong_t)&hdc100x_chip_data }, > + { "hdc1000", (kernel_ulong_t)&hdc100x_chip_data }, > + { "hdc1008", (kernel_ulong_t)&hdc1008_chip_data }, > + { "hdc1010", (kernel_ulong_t)&hdc100x_chip_data }, > + { "hdc1050", (kernel_ulong_t)&hdc100x_chip_data }, > + { "hdc1080", (kernel_ulong_t)&hdc100x_chip_data }, > { } > }; > MODULE_DEVICE_TABLE(i2c, hdc100x_id); > > static const struct of_device_id hdc100x_dt_ids[] = { > - { .compatible = "ti,hdc1000" }, > - { .compatible = "ti,hdc1008" }, > - { .compatible = "ti,hdc1010" }, > - { .compatible = "ti,hdc1050" }, > - { .compatible = "ti,hdc1080" }, > + { .compatible = "ti,hdc1000", .data = &hdc100x_chip_data }, > + { .compatible = "ti,hdc1008", .data = &hdc1008_chip_data }, > + { .compatible = "ti,hdc1010", .data = &hdc100x_chip_data }, > + { .compatible = "ti,hdc1050", .data = &hdc100x_chip_data }, > + { .compatible = "ti,hdc1080", .data = &hdc100x_chip_data }, > { } > }; > MODULE_DEVICE_TABLE(of, hdc100x_dt_ids); > -- > 2.31.1 > -- With Best Regards, Andy Shevchenko