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author | Jeremy Kerr <jk@codeconstruct.com.au> | 2023-03-31 12:15:00 +0300 |
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committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2023-04-28 09:19:01 +0300 |
commit | 21203e098cd3c1760de8112d750ceeedf09a6dad (patch) | |
tree | 0f25b422cb6676cdabe7589bfb1aee8af0b92e16 /Documentation | |
parent | d782188cbb05a196e46a4838484f020ceeb889ec (diff) | |
download | linux-21203e098cd3c1760de8112d750ceeedf09a6dad.tar.xz |
dt-bindings: i3c: Add AST2600 i3c controller
Add a devicetree binding for the ast2600 i3c controller hardware. This
is heavily based on the designware i3c core, plus a reset facility
and two platform-specific properties:
- sda-pullup-ohms: to specify the value of the configurable pullup
resistors on the SDA line
- aspeed,global-regs: to reference the (ast2600-specific) i3c global
register block, and the device index to use within it.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> (on v1)
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20230331091501.3800299-3-jk@codeconstruct.com.au
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/devicetree/bindings/i3c/aspeed,ast2600-i3c.yaml | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/i3c/aspeed,ast2600-i3c.yaml b/Documentation/devicetree/bindings/i3c/aspeed,ast2600-i3c.yaml new file mode 100644 index 000000000000..fcc3dbff9c9a --- /dev/null +++ b/Documentation/devicetree/bindings/i3c/aspeed,ast2600-i3c.yaml @@ -0,0 +1,72 @@ +# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/i3c/aspeed,ast2600-i3c.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ASPEED AST2600 i3c controller + +maintainers: + - Jeremy Kerr <jk@codeconstruct.com.au> + +allOf: + - $ref: i3c.yaml# + +properties: + compatible: + const: aspeed,ast2600-i3c + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + resets: + maxItems: 1 + + interrupts: + maxItems: 1 + + sda-pullup-ohms: + enum: [545, 750, 2000] + default: 2000 + description: | + Value to configure SDA pullup resistor, in Ohms. + + aspeed,global-regs: + $ref: /schemas/types.yaml#/definitions/phandle-array + items: + - items: + - description: phandle to i3c global register syscon node + - description: index of this i3c controller in the global register set + description: | + A (phandle, controller index) reference to the i3c global register set + used for this device. + +required: + - compatible + - reg + - clocks + - interrupts + - aspeed,global-regs + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + + i3c-master@2000 { + compatible = "aspeed,ast2600-i3c"; + reg = <0x2000 0x1000>; + #address-cells = <3>; + #size-cells = <0>; + clocks = <&syscon 0>; + resets = <&syscon 0>; + aspeed,global-regs = <&i3c_global 0>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_i3c1_default>; + interrupts = <GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>; + }; +... |