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dt-bindings: fsi: Add optional chip-id to CFAMs

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This represents a physical chip in the system and allows
a stable numbering scheme to be passed to udev for userspace
to recognize which chip is which.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Benjamin Herrenschmidt 2018-06-20 15:15:00 +10:00
parent 4fcdc2d1b0
commit e13c542d52
1 changed files with 5 additions and 0 deletions
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5
Documentation/devicetree/bindings/fsi/fsi.txt
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@ -83,6 +83,10 @@ addresses and sizes in the slave address space:
#address-cells = <1>;
#size-cells = <1>;
Optionally, a slave can provide a global unique chip ID which is used to
identify the physical location of the chip in a system specific way
chip-id = <0>;
FSI engines (devices)
---------------------
@ -125,6 +129,7 @@ device tree if no extra platform information is required.
reg = <0 0>;
#address-cells = <1>;
#size-cells = <1>;
chip-id = <0>;
/* FSI engine at 0xc00, using a single page. In this example,
* it's an I2C master controller, so subnodes describe the