# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause # Copyright (C) 2019,2020 Lubomir Rintel <lkundrak@v3.sk> %YAML 1.2 --- $id: http://devicetree.org/schemas/misc/olpc,xo1.75-ec.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: OLPC XO-1.75 Embedded Controller bindings description: | This binding describes the Embedded Controller acting as a SPI bus master on a OLPC XO-1.75 laptop computer. The embedded controller requires the SPI controller driver to signal readiness to receive a transfer (that is, when TX FIFO contains the response data) by strobing the ACK pin with the ready signal. See the "ready-gpios" property of the SSP binding as documented in: <Documentation/devicetree/bindings/spi/marvell,mmp2-ssp.yaml>. maintainers: - Lubomir Rintel <lkundrak@v3.sk> properties: compatible: const: olpc,xo1.75-ec cmd-gpios: description: GPIO uspecifier of the CMD pin maxItems: 1 required: - compatible - cmd-gpios unevaluatedProperties: false examples: - | #include <dt-bindings/gpio/gpio.h> spi { spi-slave; ready-gpios = <&gpio 125 GPIO_ACTIVE_HIGH>; slave { compatible = "olpc,xo1.75-ec"; spi-cpha; cmd-gpios = <&gpio 155 GPIO_ACTIVE_HIGH>; }; }; ...