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- /* SPDX-License-Identifier: GPL-2.0+ */
- /*
- * This is the interface to the sandbox GPIO driver for test code which
- * wants to change the GPIO values reported to U-Boot.
- *
- * Copyright (c) 2011 The Chromium OS Authors.
- */
- #ifndef __ASM_SANDBOX_GPIO_H
- #define __ASM_SANDBOX_GPIO_H
- /*
- * We use the generic interface, and add a back-channel.
- *
- * The back-channel functions are declared in this file. They should not be used
- * except in test code.
- *
- * Test code can, for example, call sandbox_gpio_set_value() to set the value of
- * a simulated GPIO. From then on, normal code in U-Boot will see this new
- * value when it calls gpio_get_value().
- *
- * NOTE: DO NOT use the functions in this file except in test code!
- */
- #include <asm-generic/gpio.h>
- /* Our own private GPIO flags, which musn't conflict with GPIOD_... */
- #define GPIOD_EXT_HIGH BIT(31) /* external source is high (else low) */
- #define GPIOD_EXT_DRIVEN BIT(30) /* external source is driven */
- #define GPIOD_EXT_PULL_UP BIT(29) /* GPIO has external pull-up */
- #define GPIOD_EXT_PULL_DOWN BIT(28) /* GPIO has external pull-down */
- #define GPIOD_EXT_PULL (BIT(28) | BIT(29))
- #define GPIOD_SANDBOX_MASK GENMASK(31, 28)
- /**
- * Return the simulated value of a GPIO (used only in sandbox test code)
- *
- * @param dev device to use
- * @param offset GPIO offset within bank
- * @return -1 on error, 0 if GPIO is low, >0 if high
- */
- int sandbox_gpio_get_value(struct udevice *dev, unsigned int offset);
- /**
- * Set the simulated value of a GPIO (used only in sandbox test code)
- *
- * @param dev device to use
- * @param offset GPIO offset within bank
- * @param value value to set (0 for low, non-zero for high)
- * @return -1 on error, 0 if ok
- */
- int sandbox_gpio_set_value(struct udevice *dev, unsigned int offset, int value);
- /**
- * Return the simulated direction of a GPIO (used only in sandbox test code)
- *
- * @param dev device to use
- * @param offset GPIO offset within bank
- * @return -1 on error, 0 if GPIO is input, >0 if output
- */
- int sandbox_gpio_get_direction(struct udevice *dev, unsigned int offset);
- /**
- * Set the simulated direction of a GPIO (used only in sandbox test code)
- *
- * @param dev device to use
- * @param offset GPIO offset within bank
- * @param output 0 to set as input, 1 to set as output
- * @return -1 on error, 0 if ok
- */
- int sandbox_gpio_set_direction(struct udevice *dev, unsigned int offset,
- int output);
- /**
- * Return the simulated flags of a GPIO (used only in sandbox test code)
- *
- * @param dev device to use
- * @param offset GPIO offset within bank
- * @return dir_flags: bitfield accesses by GPIOD_ defines
- */
- ulong sandbox_gpio_get_flags(struct udevice *dev, unsigned int offset);
- /**
- * Set the simulated flags of a GPIO (used only in sandbox test code)
- *
- * @param dev device to use
- * @param offset GPIO offset within bank
- * @param flags bitfield accesses by GPIOD_ defines
- * @return -1 on error, 0 if ok
- */
- int sandbox_gpio_set_flags(struct udevice *dev, unsigned int offset,
- ulong flags);
- #endif
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