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Subject[PATCH v3 4/4] dt-bindings: net: Document use of mac-address-increment
Date
Two new bindings are now supported by the of_net driver to increase (or
decrease) a mac-address. This can be very useful in case where the
system extract the mac-address for the device from a dedicated partition
and have a generic mac-address that needs to be incremented based on the
device number.
- mac-address-increment-byte is used to tell what byte must be
incremented (if not set the last byte is increased)
- mac-address-increment is used to tell how much to increment of the
extracted mac-address decided byte.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
---
.../bindings/net/ethernet-controller.yaml | 21 +++++++++++++++++++
1 file changed, 21 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/ethernet-controller.yaml b/Documentation/devicetree/bindings/net/ethernet-controller.yaml
index fa2baca8c726..8174f64e79bd 100644
--- a/Documentation/devicetree/bindings/net/ethernet-controller.yaml
+++ b/Documentation/devicetree/bindings/net/ethernet-controller.yaml
@@ -32,6 +32,27 @@ properties:
- minItems: 6
maxItems: 6

+ mac-address-increment:
+ description:
+ The MAC address can optionally be increased (or decreased using
+ negative values) from the original value read (from a nvmem cell
+ for example). This can be used if the mac is read from a dedicated
+ partition and must be increased based on the number of device
+ present in the system. The increment will not overflow/underflow to
+ the other bytes if it's over 255 or 0.
+ (example 00:01:02:03:04:ff + 1 == 00:01:02:03:04:00)
+ minimum: -255
+ maximum: 255
+
+ mac-address-increment-byte:
+ description:
+ If 'mac-address-increment' is defined, this will tell what byte of
+ the mac-address will be increased. If 'mac-address-increment' is
+ not defined, this option will do nothing.
+ default: 5
+ minimum: 3
+ maximum: 5
+
max-frame-size:
$ref: /schemas/types.yaml#definitions/uint32
description:
--
2.27.0
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