Express that at least one patternProperties is required
From: "Sa, Nuno" <Nuno.Sa@analog.com>
Date: 2021-08-18 11:04:01
Hi Rob, I'm preparing a patch to do a slight improvement in [1] where if there are no channels given in the devicetree, it does not really make sense to probe the device. Now, I want to express this in the bindings doc [2] but I'm failing to find a way to say that at least one of the patternProperties channel has to be present. For my shame, this is the only way I could express it: ----
diff --git a/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml b/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml
index 0f79d9a01c49..27c17e07aeb0 100644
--- a/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml
+++ b/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml@@ -382,6 +382,207 @@ required: - reg - interrupts +# at least one sensor channel must be present +anyOf: + - required: + - thermocouple@1 + - required: + - thermocouple@2 + - required: + - thermocouple@3 + - required: + - thermocouple@4 + - required: + - thermocouple@5 + - required: + - thermocouple@6 + - required: + - thermocouple@7 + - required: + - thermocouple@8 + - required: + - thermocouple@9 + - required: + - thermocouple@10 + - required: + - thermocouple@11 + - required: + - thermocouple@12 + - required: + - thermocouple@13 + - required: + - thermocouple@14 + - required: + - thermocouple@15 + - required: + - thermocouple@16 + - required: + - thermocouple@17 + - required: + - thermocouple@18 + - required: + - thermocouple@19 + - required: + - thermocouple@20 + - required: + - diode@1 + - required: + - diode@2 + - required: + - diode@3 + - required: + - diode@4 + - required: + - diode@5 + - required: + - diode@6 + - required: + - diode@7 + - required: + - diode@8 + - required: + - diode@9 + - required: + - diode@10 + - required: + - diode@11 + - required: + - diode@12 + - required: + - diode@13 + - required: + - diode@14 + - required: + - diode@15 + - required: + - diode@16 + - required: + - diode@17 + - required: + - diode@18 + - required: + - diode@19 + - required: + - diode@20 + - required: + - rtd@2 + - required: + - rtd@3 + - required: + - rtd@4 + - required: + - rtd@5 + - required: + - rtd@6 + - required: + - rtd@7 + - required: + - rtd@8 + - required: + - rtd@9 + - required: + - rtd@10 + - required: + - rtd@11 + - required: + - rtd@12 + - required: + - rtd@13 + - required: + - rtd@14 + - required: + - rtd@15 + - required: + - rtd@16 + - required: + - rtd@17 + - required: + - rtd@18 + - required: + - rtd@19 + - required: + - rtd@20 + - required: + - thermistor@1 + - required: + - thermistor@2 + - required: + - thermistor@3 + - required: + - thermistor@4 + - required: + - thermistor@5 + - required: + - thermistor@6 + - required: + - thermistor@7 + - required: + - thermistor@8 + - required: + - thermistor@9 + - required: + - thermistor@10 + - required: + - thermistor@11 + - required: + - thermistor@12 + - required: + - thermistor@13 + - required: + - thermistor@14 + - required: + - thermistor@15 + - required: + - thermistor@16 + - required: + - thermistor@17 + - required: + - thermistor@18 + - required: + - thermistor@19 + - required: + - thermistor@20 + - required: + - adc@1 + - required: + - adc@2 + - required: + - adc@3 + - required: + - adc@4 + - required: + - adc@5 + - required: + - adc@6 + - required: + - adc@7 + - required: + - adc@8 + - required: + - adc@9 + - required: + - adc@10 + - required: + - adc@11 + - required: + - adc@12 + - required: + - adc@13 + - required: + - adc@14 + - required: + - adc@15 + - required: + - adc@16 + - required: + - adc@17 + - required: + - adc@18 + - required: + - adc@19 + - required: + - adc@20 + additionalProperties: false examples: ----
Obviously, this looks bad but I'm not sure we can actually use regex in the required schema? Is there any clever way of expressing this or is this the only way? [1]: https://elixir.bootlin.com/linux/v5.14-rc6/source/drivers/iio/temperature/ltc2983.c#L1275 [2]: https://elixir.bootlin.com/linux/v5.14-rc6/source/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml Thanks! - Nuno Sá