u-boot/arch/arm/include/asm/omap_gpio.h
Simon Glass bcee8d6764 dm: gpio: Allow control of GPIO uclass in SPL
At present if CONFIG_SPL_GPIO_SUPPORT is enabled then the GPIO uclass
is included in SPL/TPL without any control for boards. Some boards may
want to disable this to reduce code size where GPIOs are not needed in
SPL or TPL.

Add a new Kconfig option to permit this. Default it to 'y' so that
existing boards work correctly.

Change existing uses of CONFIG_DM_GPIO to CONFIG_IS_ENABLED(DM_GPIO) to
preserve the current behaviour. Also update the 74x164 GPIO driver since
it cannot build with SPL.

This allows us to remove the hacks in config_uncmd_spl.h and
Makefile.uncmd_spl (eventually those files should be removed).

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-12-15 08:52:29 +08:00

51 lines
1.1 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2009 Wind River Systems, Inc.
* Tom Rix <Tom.Rix@windriver.com>
*
* This work is derived from the linux 2.6.27 kernel source
* To fetch, use the kernel repository
* git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
* Use the v2.6.27 tag.
*
* Below is the original's header including its copyright
*
* linux/arch/arm/plat-omap/gpio.c
*
* Support functions for OMAP GPIO
*
* Copyright (C) 2003-2005 Nokia Corporation
* Written by Juha Yrjölä <juha.yrjola@nokia.com>
*/
#ifndef _GPIO_H
#define _GPIO_H
#include <asm/arch/cpu.h>
#if CONFIG_IS_ENABLED(DM_GPIO)
/* Information about a GPIO bank */
struct omap_gpio_platdata {
int bank_index;
ulong base; /* address of registers in physical memory */
const char *port_name;
};
#else
struct gpio_bank {
void *base;
};
extern const struct gpio_bank *const omap_gpio_bank;
/**
* Check if gpio is valid.
*
* @param gpio GPIO number
* @return 1 if ok, 0 on error
*/
int gpio_is_valid(int gpio);
#endif
#endif /* _GPIO_H_ */