mirror of https://gitee.com/openkylin/linux.git
72 lines
1.5 KiB
C
72 lines
1.5 KiB
C
/*
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* Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
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*
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* Helper functions for S3C24XX/S3C64XX SoC series CAMIF driver
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/gpio.h>
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#include <plat/gpio-cfg.h>
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#include <mach/gpio-samsung.h>
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/* Number of camera port pins, without FIELD */
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#define S3C_CAMIF_NUM_GPIOS 13
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/* Default camera port configuration helpers. */
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static void camif_get_gpios(int *gpio_start, int *gpio_reset)
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{
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#ifdef CONFIG_ARCH_S3C24XX
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*gpio_start = S3C2410_GPJ(0);
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*gpio_reset = S3C2410_GPJ(12);
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#else
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/* s3c64xx */
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*gpio_start = S3C64XX_GPF(0);
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*gpio_reset = S3C64XX_GPF(3);
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#endif
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}
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int s3c_camif_gpio_get(void)
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{
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int gpio_start, gpio_reset;
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int ret, i;
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camif_get_gpios(&gpio_start, &gpio_reset);
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for (i = 0; i < S3C_CAMIF_NUM_GPIOS; i++) {
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int gpio = gpio_start + i;
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if (gpio == gpio_reset)
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continue;
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ret = gpio_request(gpio, "camif");
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if (!ret)
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ret = s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
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if (ret) {
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pr_err("failed to configure GPIO %d\n", gpio);
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for (--i; i >= 0; i--)
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gpio_free(gpio--);
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return ret;
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}
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s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
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}
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return 0;
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}
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void s3c_camif_gpio_put(void)
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{
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int i, gpio_start, gpio_reset;
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camif_get_gpios(&gpio_start, &gpio_reset);
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for (i = 0; i < S3C_CAMIF_NUM_GPIOS; i++) {
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int gpio = gpio_start + i;
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if (gpio != gpio_reset)
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gpio_free(gpio);
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}
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}
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