On 12/18/19 7:32 PM, Logan Shaw wrote:
Added a new file documenting the adt7475 devicetree and added the five
new properties to it.
Signed-off-by: Logan Shaw <logan.shaw@xxxxxxxxxxxxxxxxxxx>
---
---
.../devicetree/bindings/hwmon/adt7475.txt | 35 +++++++++++++++++++
1 file changed, 35 insertions(+)
create mode 100644 Documentation/devicetree/bindings/hwmon/adt7475.txt
diff --git a/Documentation/devicetree/bindings/hwmon/adt7475.txt b/Documentation/devicetree/bindings/hwmon/adt7475.txt
new file mode 100644
index 000000000000..388dd718a246
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/adt7475.txt
@@ -0,0 +1,35 @@
+*ADT7475 hwmon sensor.
+
+Required properties:
+- compatible: One of
+ "adi,adt7473"
+ "adi,adt7475"
+ "adi,adt7476"
+ "adi,adt7490"
+
+- reg: I2C address
+
+optional properties:
+
+- bypass-attenuator-all: Configures bypassing all voltage input attenuators.
+ This is only supported on the ADT7476 and ADT7490, this property does
+ nothing on other chips.
Both adt7473 and adt7475 do support configuring an attenuator on VCCP
+ property present: Bit set to bypass all voltage input attenuators.
+ property absent: Registers left unchanged.
+
+- bypass-attenuator-inx: Configures bypassing individual voltage input
+ attenuators, where x is an integer from the set {0, 1, 3, 4}. This
+ is only supported on the ADT7476 and ADT7490, this property does nothing
+ on other chips.
+ property present: Bit set to bypass specific voltage input attenuator
+ for voltage input x.
+ property absent: Registers left unchanged.
+
This is interesting. It essentially means "retain configuration from ROM
Monitor", but leaves no means to _disable_ the bypass.
+Example:
+
+hwmon@2e {
+ compatible = "adi,adt7475";
+ reg = <0x2e>;
+ bypass-attenuator-all;
+ bypass-attenuator-in1;
What would be the purpose of specifying both all and in1 ?
+};
\ No newline at end of file
