On Wed, Dec 11, 2019 at 11:46:17AM -0800, Jae Hyun Yoo wrote: > From: Tomer Maimon <tmaimon77@xxxxxxxxx> > > Added device tree binding documentation for Nuvoton BMC > NPCM Platform Environment Control Interface(PECI). > > Signed-off-by: Tomer Maimon <tmaimon77@xxxxxxxxx> > Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@xxxxxxxxxxxxxxx> > --- > Changes since v10: > - Newly added in v11. > > .../devicetree/bindings/peci/peci-npcm.yaml | 102 ++++++++++++++++++ > 1 file changed, 102 insertions(+) > create mode 100644 Documentation/devicetree/bindings/peci/peci-npcm.yaml > > diff --git a/Documentation/devicetree/bindings/peci/peci-npcm.yaml b/Documentation/devicetree/bindings/peci/peci-npcm.yaml > new file mode 100644 > index 000000000000..bcd5626e68e7 > --- /dev/null > +++ b/Documentation/devicetree/bindings/peci/peci-npcm.yaml > @@ -0,0 +1,102 @@ > +# SPDX-License-Identifier: GPL-2.0 > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/peci/peci-npcm.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Nuvoton NPCM PECI Bus Device Tree Bindings > + > +maintainers: > + - Tomer Maimon <tmaimon77@xxxxxxxxx> > + > +properties: > + compatible: > + const: nuvoton,npcm750-peci # for the NPCM7XX BMC. > + > + reg: > + maxItems: 1 > + > + "#address-cells": > + # Required to define a client address. > + const: 1 > + > + "#size-cells": > + # Required to define a client address. > + const: 0 > + > + interrupts: > + maxItems: 1 > + > + clocks: > + # PECI reference clock. > + maxItems: 1 > + > + cmd-timeout-ms: > + # Command timeout in units of ms. > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32 You can drop this as standard units already have a type. > + - minimum: 1 > + maximum: 60000 > + default: 1000 > + > + pull-down: > + description: | > + Defines the PECI I/O internal pull down operation. > + 0: pull down always enable > + 1: pull down only during transactions. > + 2: pull down always disable. > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32 > + - minimum: 0 > + maximum: 2 > + default: 0 > + > + host-neg-bit-rate: > + description: | > + Define host negotiation bit rate divider. > + the host negotiation bit rate calculate with formula: > + clock frequency[Hz] / [4 x {host-neg-bit-rate + 1}] > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32 > + - minimum: 7 > + maximum: 31 > + default: 15 > + > + high-volt-range: > + description: | > + Adapts PECI I/O interface to voltage range. > + 0: PECI I/O interface voltage range of 0.8-1.06V (default) > + 1: PECI I/O interface voltage range of 0.95-1.26V > + type: boolean These last 4 properties are vendor specific or PECI common. For the former, needs a vendor prefix. For the latter, needs to be moved to common location. > + > +required: > + - compatible > + - reg > + - "#address-cells" > + - "#size-cells" > + - interrupts > + - clocks > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/arm-gic.h> > + #include <dt-bindings/clock/nuvoton,npcm7xx-clock.h> > + peci: bus@100000 { > + compatible = "simple-bus"; > + #address-cells = <1>; > + #size-cells = <1>; > + ranges = <0x0 0x100000 0x200>; > + > + peci0: peci-bus@0 { > + compatible = "nuvoton,npcm750-peci"; > + reg = <0x0 0x200>; > + #address-cells = <1>; > + #size-cells = <0>; > + interrupts = <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>; > + clocks = <&clk NPCM7XX_CLK_APB3>; > + cmd-timeout-ms = <1000>; > + pull-down = <0>; > + host-neg-bit-rate = <15>; > + }; > + }; > +... > -- > 2.17.1 >
