forked from Mirrors/opensbi
d71150ee70
Since the FDT is not modified during driver initialization, node offsets are just as suitable as phandles for use as identifiers: they are stable and unique. With this change, it is no longer necessary to pass the phandle to the driver init functions, so these init functions now use the same prototype as other kinds of drivers. This matches what is already done for I2C adapters. Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Reviewed-by: Anup Patel <anup@brainfault.org>
37 lines
936 B
C
37 lines
936 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/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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const struct fdt_match *match_table;
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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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int (*init)(const void *fdt, int nodeoff,
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const struct fdt_match *match);
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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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