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/* Copyright 2020 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#if !defined(__CROS_EC_GPIO_SIGNAL_H) || defined(__CROS_EC_ZEPHYR_GPIO_SIGNAL_H)
#error "This file must only be included from gpio_signal.h. Include gpio_signal.h directly."
#endif
#define __CROS_EC_ZEPHYR_GPIO_SIGNAL_H
#include <devicetree.h>
#include <toolchain.h>
#define GPIO_SIGNAL(id) DT_STRING_UPPER_TOKEN(id, enum_name)
#define GPIO_SIGNAL_WITH_COMMA(id) \
COND_CODE_1(DT_NODE_HAS_PROP(id, enum_name), (GPIO_SIGNAL(id), ), ())
enum gpio_signal {
GPIO_UNIMPLEMENTED = -1,
#if DT_NODE_EXISTS(DT_PATH(named_gpios))
DT_FOREACH_CHILD(DT_PATH(named_gpios), GPIO_SIGNAL_WITH_COMMA)
#endif
GPIO_COUNT,
GPIO_LIMIT = 0x0FFF,
};
#undef GPIO_SIGNAL_WITH_COMMA
BUILD_ASSERT(GPIO_COUNT < GPIO_LIMIT);
/** @brief Converts a node identifier under named gpios to enum
*
* Converts the specified node identifier name, which should be nested under
* the named_gpios node, into the correct enum gpio_signal that can be used
* with platform/ec gpio API
*/
#define NAMED_GPIO(name) GPIO_SIGNAL(DT_PATH(named_gpios, name))
/** @brief Obtain a named gpio enum from a label and property
*
* Obtains a valid enum gpio_signal that can be used with platform/ec gpio API
* from the property of a labeled node. The property has to point to a
* named_gpios node.
*/
#define NAMED_GPIO_NODELABEL(label, prop) \
GPIO_SIGNAL(DT_PHANDLE(DT_NODELABEL(label), prop))
/*
* While we don't support IO expanders at the moment, multiple
* platform/ec headers (e.g., espi.h) require some of these constants
* to be defined. Define them as a compatibility measure.
*/
enum ioex_signal {
IOEX_SIGNAL_START = GPIO_LIMIT + 1,
IOEX_SIGNAL_END = IOEX_SIGNAL_START,
IOEX_LIMIT = 0x1FFF,
};
BUILD_ASSERT(IOEX_SIGNAL_END < IOEX_LIMIT);
#define IOEX_COUNT (IOEX_SIGNAL_END - IOEX_SIGNAL_START)
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