add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/gpio/gpio-reg.c
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@@ -1,11 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * gpio-reg: single register individually fixed-direction GPIOs
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  *
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  * Copyright (C) 2016 Russell King
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- *
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- * This software is licensed under the terms of the GNU General Public
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- * License version 2, as published by the Free Software Foundation, and
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- * may be copied, distributed, and modified under those terms.
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  */
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 #include <linux/gpio/driver.h>
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 #include <linux/gpio/gpio-reg.h>
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@@ -29,7 +26,8 @@
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 {
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 	struct gpio_reg *r = to_gpio_reg(gc);
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-	return r->direction & BIT(offset) ? 1 : 0;
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+	return r->direction & BIT(offset) ? GPIO_LINE_DIRECTION_IN :
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+					    GPIO_LINE_DIRECTION_OUT;
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 }
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 static int gpio_reg_direction_output(struct gpio_chip *gc, unsigned offset,