iio:pressure:ms5637: add ms5803 support

The ms5803 is very similar to the ms5805 but has less resolution options
and has the 128bit PROM layout.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210109231148.1168104-7-alexandre.belloni@bootlin.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/trivial-devices.yaml

@@ -153,6 +153,8 @@ properties:
             # Measurement Specialities I2C pressure and temperature sensor
           - meas,ms5637
             # Measurement Specialities I2C pressure and temperature sensor
+          - meas,ms5803
+            # Measurement Specialities I2C pressure and temperature sensor
           - meas,ms5805
             # Measurement Specialities I2C pressure and temperature sensor
           - meas,ms5837

drivers/iio/pressure/ms5637.c

@@ -200,8 +200,15 @@ static const struct ms_tp_hw_data ms5637_hw_data  = {
 	.max_res_index = 5
 };
 
+static const struct ms_tp_hw_data ms5803_hw_data  = {
+	.prom_len = 8,
+	.max_res_index = 4
+};
+
 static const struct ms_tp_data ms5637_data = { .name = "ms5637", .hw = &ms5637_hw_data };
 
+static const struct ms_tp_data ms5803_data = { .name = "ms5803", .hw = &ms5803_hw_data };
+
 static const struct ms_tp_data ms5805_data = { .name = "ms5805", .hw = &ms5637_hw_data };
 
 static const struct ms_tp_data ms5837_data = { .name = "ms5837", .hw = &ms5637_hw_data };
@@ -222,6 +229,7 @@ MODULE_DEVICE_TABLE(i2c, ms5637_id);
 
 static const struct of_device_id ms5637_of_match[] = {
 	{ .compatible = "meas,ms5637", .data = &ms5637_data },
+	{ .compatible = "meas,ms5803", .data = &ms5803_data },
 	{ .compatible = "meas,ms5805", .data = &ms5805_data },
 	{ .compatible = "meas,ms5837", .data = &ms5837_data },
 	{ .compatible = "meas,ms8607-temppressure", .data = &ms8607_data },