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To: Gyeyoung Baek Cc: jic23@kernel.org, dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux-iio@vger.kernel.org, devicetree@vger.kernel.org Content-Type: text/plain; charset="UTF-8" The pin-compatiblity and UART configuration are same. Although documentation on mhz19c's UART commands is sparse. It can be reasonably thought of that the commands from mhz19b will be supported in mhz19c. The mhz19b document mentions all the different commands. Still the uncertainity is noted. Signed-off-by: Sidharth Seela --- drivers/iio/chemical/mhz19b.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/iio/chemical/mhz19b.c b/drivers/iio/chemical/mhz19b.c index 3c64154918b1..4899aad895d5 100644 --- a/drivers/iio/chemical/mhz19b.c +++ b/drivers/iio/chemical/mhz19b.c @@ -297,7 +297,17 @@ static int mhz19b_probe(struct serdev_device *serdev) } static const struct of_device_id mhz19b_of_match[] = { + /* It should be noted that mhz19b is discontinued*/ { .compatible = "winsen,mhz19b", }, + /* Beware that mhz19c has same pinout, UART characteristics.But there + * are gaps in the official user-manual[1], specifically + * regarding. + * Calibrate Zero Point. + * Calibrate Span Point. + * Detection range setting. + * Ref [1]: https://www.winsen-sensor.com/d/files/infrared-gas-sensor/mh-z19c-pins-type-co2-manual-ver1_0.pdf + */ + { .compatible = "winsen,mhz19c", }, { } }; MODULE_DEVICE_TABLE(of, mhz19b_of_match); -- 2.39.5 (Apple Git-154)