arch/arm/mach-s3c/setup-sdhci-gpio-s3c64xx.c

Source file repositories/reference/linux-study-clean/arch/arm/mach-s3c/setup-sdhci-gpio-s3c64xx.c

File Facts

System
Linux kernel
Corpus path
arch/arm/mach-s3c/setup-sdhci-gpio-s3c64xx.c
Extension
.c
Size
1639 bytes
Lines
54
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
//
// Copyright 2008 Simtec Electronics
//	Ben Dooks <ben@simtec.co.uk>
//	http://armlinux.simtec.co.uk/
//
// S3C64XX - Helper functions for setting up SDHCI device(s) GPIO (HSMMC)

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/gpio.h>

#include "gpio-cfg.h"
#include "sdhci.h"
#include "gpio-samsung.h"

void s3c64xx_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
{
	struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;

	/* Set all the necessary GPG pins to special-function 2 */
	s3c_gpio_cfgrange_nopull(S3C64XX_GPG(0), 2 + width, S3C_GPIO_SFN(2));

	if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
		s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP);
		s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(2));
	}
}

void s3c64xx_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
{
	struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;

	/* Set all the necessary GPH pins to special-function 2 */
	s3c_gpio_cfgrange_nopull(S3C64XX_GPH(0), 2 + width, S3C_GPIO_SFN(2));

	if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
		s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP);
		s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(3));
	}
}

void s3c64xx_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
{
	/* Set all the necessary GPH pins to special-function 3 */
	s3c_gpio_cfgrange_nopull(S3C64XX_GPH(6), width, S3C_GPIO_SFN(3));

	/* Set all the necessary GPC pins to special-function 3 */
	s3c_gpio_cfgrange_nopull(S3C64XX_GPC(4), 2, S3C_GPIO_SFN(3));
}

Annotation

Implementation Notes