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Commit e51d5486 authored by Sylwester Nawrocki's avatar Sylwester Nawrocki Committed by Kukjin Kim
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ARM: SAMSUNG: Add s3c24xx/s3c64xx CAMIF GPIO setup helpers 



This patch adds default helper functions for the camera port
pin configuration. Whenever pinctrl support for s3c24xx/s3c64xx
SoCs is available these code should be removed and proper pinctrl
API should be used in the CAMIF driver.

Signed-off-by: default avatarSylwester Nawrocki <sylvester.nawrocki@gmail.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent f4a75d2e

arch/arm/mach-s3c24xx/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -405,6 +405,7 @@ config MACH_MINI2440 
	select NEW_LEDS

	select S3C_DEV_NAND

	select S3C_DEV_USB_HOST

	select S3C_SETUP_CAMIF

	help

	  Say Y here to select support for the MINI2440. Is a 10cm x 10cm board

	  available via various sources. It can come with a 3.5" or 7" touch LCD.

arch/arm/plat-samsung/Kconfig

+5 −0
Original line number Diff line number Diff line
@@ -414,6 +414,11 @@ config S5P_SETUP_MIPIPHY 
	help

	  Compile in common setup code for MIPI-CSIS and MIPI-DSIM devices



config S3C_SETUP_CAMIF

	bool

	help

	  Compile in common setup code for S3C CAMIF devices



# DMA



config S3C_DMA

arch/arm/plat-samsung/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -41,6 +41,7 @@ obj-$(CONFIG_S5P_DEV_UART) += s5p-dev-uart.o 


obj-$(CONFIG_SAMSUNG_DEV_BACKLIGHT)	+= dev-backlight.o



obj-$(CONFIG_S3C_SETUP_CAMIF)	+= setup-camif.o

obj-$(CONFIG_S5P_SETUP_MIPIPHY)	+= setup-mipiphy.o



# DMA support

arch/arm/plat-samsung/setup-camif.c

0 → 100644
+70 −0
Original line number Diff line number Diff line 
/*

 * 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>



/* 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);

	}

}