gpio: Clarify that <linux/gpio.h> is legacy
It should be clear to developers that they should not include this file in new code. Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* <linux/gpio.h>
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*
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* This is the LEGACY GPIO bulk include file, including legacy APIs. It is
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* used for GPIO drivers still referencing the global GPIO numberspace,
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* and should not be included in new code.
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*
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* If you're implementing a GPIO driver, only include <linux/gpio/driver.h>
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* If you're implementing a GPIO consumer, only include <linux/gpio/consumer.h>
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*/
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#ifndef __LINUX_GPIO_H
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#define __LINUX_GPIO_H
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