https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: c13dcf9f2d6f5f06ef1bf79ec456df614c5e058b authored by Linus Torvalds on 24 August 2015, 03:52:59 UTC
Linux 4.2-rc8
Linux 4.2-rc8
Tip revision: c13dcf9
setup-camif.c
/*
* Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
*
* Helper functions for S3C24XX/S3C64XX SoC series CAMIF driver
*
* 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>
#include <mach/gpio-samsung.h>
/* Number of camera port pins, without FIELD */
#define S3C_CAMIF_NUM_GPIOS 13
/* Default camera port configuration helpers. */
static void camif_get_gpios(int *gpio_start, int *gpio_reset)
{
#ifdef CONFIG_ARCH_S3C24XX
*gpio_start = S3C2410_GPJ(0);
*gpio_reset = S3C2410_GPJ(12);
#else
/* s3c64xx */
*gpio_start = S3C64XX_GPF(0);
*gpio_reset = S3C64XX_GPF(3);
#endif
}
int s3c_camif_gpio_get(void)
{
int gpio_start, gpio_reset;
int ret, i;
camif_get_gpios(&gpio_start, &gpio_reset);
for (i = 0; i < S3C_CAMIF_NUM_GPIOS; i++) {
int gpio = gpio_start + i;
if (gpio == gpio_reset)
continue;
ret = gpio_request(gpio, "camif");
if (!ret)
ret = s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
if (ret) {
pr_err("failed to configure GPIO %d\n", gpio);
for (--i; i >= 0; i--)
gpio_free(gpio--);
return ret;
}
s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
}
return 0;
}
void s3c_camif_gpio_put(void)
{
int i, gpio_start, gpio_reset;
camif_get_gpios(&gpio_start, &gpio_reset);
for (i = 0; i < S3C_CAMIF_NUM_GPIOS; i++) {
int gpio = gpio_start + i;
if (gpio != gpio_reset)
gpio_free(gpio);
}
}