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56 lines
1.3 KiB
56 lines
1.3 KiB
# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause |
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# Copyright (C) 2019,2020 Lubomir Rintel <[email protected]> |
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%YAML 1.2 |
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--- |
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$id: http://devicetree.org/schemas/misc/olpc,xo1.75-ec.yaml# |
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$schema: http://devicetree.org/meta-schemas/core.yaml# |
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title: OLPC XO-1.75 Embedded Controller bindings |
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description: | |
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This binding describes the Embedded Controller acting as a SPI bus master |
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on a OLPC XO-1.75 laptop computer. |
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The embedded controller requires the SPI controller driver to signal |
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readiness to receive a transfer (that is, when TX FIFO contains the |
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response data) by strobing the ACK pin with the ready signal. See the |
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"ready-gpios" property of the SSP binding as documented in: |
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<Documentation/devicetree/bindings/spi/marvell,mmp2-ssp.yaml>. |
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maintainers: |
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- Lubomir Rintel <[email protected]> |
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properties: |
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compatible: |
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const: olpc,xo1.75-ec |
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cmd-gpios: |
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description: GPIO uspecifier of the CMD pin |
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maxItems: 1 |
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spi-cpha: true |
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required: |
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- compatible |
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- cmd-gpios |
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additionalProperties: false |
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examples: |
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- | |
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#include <dt-bindings/gpio/gpio.h> |
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spi { |
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spi-slave; |
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#address-cells = <0>; |
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#size-cells = <0>; |
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ready-gpios = <&gpio 125 GPIO_ACTIVE_HIGH>; |
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slave { |
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compatible = "olpc,xo1.75-ec"; |
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spi-cpha; |
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cmd-gpios = <&gpio 155 GPIO_ACTIVE_HIGH>; |
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}; |
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}; |
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...
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