arch/arm/mach-msm/gpio.c

/* linux/arch/arm/mach-msm/gpio.c
 *
 * Copyright (C) 2007 Google, Inc.
 * Copyright (c) 2009, Code Aurora Forum. All rights reserved.
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#include <linux/module.h>
#include <mach/gpio.h>
#include "proc_comm.h"

int gpio_tlmm_config(unsigned config, unsigned disable)
{
	return msm_proc_comm(PCOM_RPC_GPIO_TLMM_CONFIG_EX, &config, &disable);
}
EXPORT_SYMBOL(gpio_tlmm_config);

int msm_gpios_enable(const struct msm_gpio *table, int size)
{
	int rc;
	int i;
	const struct msm_gpio *g;
	for (i = 0; i < size; i++) {
		g = table + i;
		rc = gpio_tlmm_config(g->gpio_cfg, GPIO_ENABLE);
		if (rc) {
			pr_err("gpio_tlmm_config(0x%08x, GPIO_ENABLE)"
			       " <%s> failed: %d\n",
			       g->gpio_cfg, g->label ?: "?", rc);
			pr_err("pin %d func %d dir %d pull %d drvstr %d\n",
			       GPIO_PIN(g->gpio_cfg), GPIO_FUNC(g->gpio_cfg),
			       GPIO_DIR(g->gpio_cfg), GPIO_PULL(g->gpio_cfg),
			       GPIO_DRVSTR(g->gpio_cfg));
			goto err;
		}
	}
	return 0;
err:
	msm_gpios_disable(table, i);
	return rc;
}
EXPORT_SYMBOL(msm_gpios_enable);

void msm_gpios_disable(const struct msm_gpio *table, int size)
{
	int rc;
	int i;
	const struct msm_gpio *g;
	for (i = size-1; i >= 0; i--) {
		g = table + i;
		rc = gpio_tlmm_config(g->gpio_cfg, GPIO_DISABLE);
		if (rc) {
			pr_err("gpio_tlmm_config(0x%08x, GPIO_DISABLE)"
			       " <%s> failed: %d\n",
			       g->gpio_cfg, g->label ?: "?", rc);
			pr_err("pin %d func %d dir %d pull %d drvstr %d\n",
			       GPIO_PIN(g->gpio_cfg), GPIO_FUNC(g->gpio_cfg),
			       GPIO_DIR(g->gpio_cfg), GPIO_PULL(g->gpio_cfg),
			       GPIO_DRVSTR(g->gpio_cfg));
		}
	}
}
EXPORT_SYMBOL(msm_gpios_disable);

int msm_gpios_request_enable(const struct msm_gpio *table, int size)
{
	int rc = msm_gpios_enable(table, size);
	return rc;
}
EXPORT_SYMBOL(msm_gpios_request_enable);

void msm_gpios_disable_free(const struct msm_gpio *table, int size)
{
	msm_gpios_disable(table, size);
}
EXPORT_SYMBOL(msm_gpios_disable_free);