forked from Mirrors/opensbi
bef8f9b806
FDT gpio drivers have an extra .xlate operation, so they need to embed the `struct fdt_driver` inside the subsystem-specific type. The gpio subsystem always initializes the driver for a specific DT node. Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Reviewed-by: Anup Patel <anup@brainfault.org>
36 lines
882 B
C
36 lines
882 B
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2021 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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*/
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#ifndef __FDT_GPIO_H__
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#define __FDT_GPIO_H__
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#include <sbi_utils/fdt/fdt_driver.h>
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#include <sbi_utils/gpio/gpio.h>
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struct fdt_phandle_args;
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/** FDT based GPIO driver */
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struct fdt_gpio {
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struct fdt_driver driver;
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int (*xlate)(struct gpio_chip *chip,
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const struct fdt_phandle_args *pargs,
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struct gpio_pin *out_pin);
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};
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/** Get a GPIO pin using "gpios" DT property of client DT node */
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int fdt_gpio_pin_get(const void *fdt, int nodeoff, int index,
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struct gpio_pin *out_pin);
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/** Simple xlate function to convert two GPIO FDT cells into GPIO pin */
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int fdt_gpio_simple_xlate(struct gpio_chip *chip,
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const struct fdt_phandle_args *pargs,
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struct gpio_pin *out_pin);
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#endif
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