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authorSascha Hauer <s.hauer@pengutronix.de>2019-10-15 10:55:58 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2019-10-15 10:55:58 +0200
commit2036f2866753a28b2783ad6dc78a40ca5345e6d8 (patch)
tree468b1c17b06a2377c5f8e6d711d8f3187f60667f /dts/Bindings/fieldbus/arcx,anybus-controller.txt
parent785f926d4527184194b6424bc39ce367e2cea7d8 (diff)
downloadbarebox-2036f2866753a28b2783ad6dc78a40ca5345e6d8.tar.gz
barebox-2036f2866753a28b2783ad6dc78a40ca5345e6d8.tar.xz
dts: update to v5.4-rc1
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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-* Arcx Anybus-S controller
-
-This chip communicates with the SoC over a parallel bus. It is
-expected that its Device Tree node is specified as the child of a node
-corresponding to the parallel bus used for communication.
-
-Required properties:
---------------------
-
- - compatible : The following chip-specific string:
- "arcx,anybus-controller"
-
- - reg : three areas:
- index 0: bus memory area where the cpld registers are located.
- index 1: bus memory area of the first host's dual-port ram.
- index 2: bus memory area of the second host's dual-port ram.
-
- - reset-gpios : the GPIO pin connected to the reset line of the controller.
-
- - interrupts : two interrupts:
- index 0: interrupt connected to the first host
- index 1: interrupt connected to the second host
- Generic interrupt client node bindings are described in
- interrupt-controller/interrupts.txt
-
-Optional: use of subnodes
--------------------------
-
-The card connected to a host may need additional properties. These can be
-specified in subnodes to the controller node.
-
-The subnodes are identified by the standard 'reg' property. Which information
-exactly can be specified depends on the bindings for the function driver
-for the subnode.
-
-Required controller node properties when using subnodes:
-- #address-cells: should be one.
-- #size-cells: should be zero.
-
-Required subnode properties:
-- reg: Must contain the host index of the card this subnode describes:
- <0> for the first host on the controller
- <1> for the second host on the controller
- Note that only a single card can be plugged into a host, so the host
- index uniquely describes the card location.
-
-Example of usage:
------------------
-
-This example places the bridge on top of the i.MX WEIM parallel bus, see:
-Documentation/devicetree/bindings/bus/imx-weim.txt
-
-&weim {
- controller@0,0 {
- compatible = "arcx,anybus-controller";
- reg = <0 0 0x100>, <0 0x400000 0x800>, <1 0x400000 0x800>;
- reset-gpios = <&gpio5 2 GPIO_ACTIVE_HIGH>;
- interrupt-parent = <&gpio1>;
- interrupts = <1 IRQ_TYPE_LEVEL_LOW>, <5 IRQ_TYPE_LEVEL_LOW>;
- /* fsl,weim-cs-timing is a i.MX WEIM bus specific property */
- fsl,weim-cs-timing = <0x024400b1 0x00001010 0x20081100
- 0x00000000 0xa0000240 0x00000000>;
- /* optional subnode for a card plugged into the first host */
- #address-cells = <1>;
- #size-cells = <0>;
- card@0 {
- reg = <0>;
- /* card specific properties go here */
- };
- };
-};