From: Benjamin Herrenschmidt Date: Wed, 20 Jun 2018 05:15:00 +0000 (+1000) Subject: dt-bindings: fsi: Add optional chip-id to CFAMs X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e13c542d5227481836e91f7b3a025e2c9092bc04;p=linux.git dt-bindings: fsi: Add optional chip-id to CFAMs 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 Acked-by: Rob Herring --- diff --git a/Documentation/devicetree/bindings/fsi/fsi.txt b/Documentation/devicetree/bindings/fsi/fsi.txt index ab516c673a4b8..afb4eccab1319 100644 --- a/Documentation/devicetree/bindings/fsi/fsi.txt +++ b/Documentation/devicetree/bindings/fsi/fsi.txt @@ -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