1. 根目录:
2. arch
3. arm
4. mach-s5p64x0
5. setup-spi.c

/* linux/arch/arm/mach-s5p64x0/setup-spi.c
 *
 * Copyright (C) 2011 Samsung Electronics Ltd.
 *		http://www.samsung.com/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/gpio.h>
#include <plat/gpio-cfg.h>

#ifdef CONFIG_S3C64XX_DEV_SPI0
int s3c64xx_spi0_cfg_gpio(void)
{
	if (soc_is_s5p6450())
		s3c_gpio_cfgall_range(S5P6450_GPC(0), 3,
					S3C_GPIO_SFN(2), S3C_GPIO_PULL_UP);
	else
		s3c_gpio_cfgall_range(S5P6440_GPC(0), 3,
					S3C_GPIO_SFN(2), S3C_GPIO_PULL_UP);
	return 0;
}
#endif

#ifdef CONFIG_S3C64XX_DEV_SPI1
int s3c64xx_spi1_cfg_gpio(void)
{
	if (soc_is_s5p6450())
		s3c_gpio_cfgall_range(S5P6450_GPC(4), 3,
					S3C_GPIO_SFN(2), S3C_GPIO_PULL_UP);
	else
		s3c_gpio_cfgall_range(S5P6440_GPC(4), 3,
					S3C_GPIO_SFN(2), S3C_GPIO_PULL_UP);
	return 0;
}
#endif