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ARM: SAMSUNG: Add s3c24xx/s3c64xx CAMIF GPIO setup helpers

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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: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Sylwester Nawrocki 2012-11-22 14:29:18 +09:00 committed by Kukjin Kim
parent f4a75d2eb7
commit e51d5486a9
4 changed files with 77 additions and 0 deletions
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1
arch/arm/mach-s3c24xx/Kconfig
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@ -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.

5
arch/arm/plat-samsung/Kconfig
View File

@ -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

1
arch/arm/plat-samsung/Makefile
View File

@ -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

70
arch/arm/plat-samsung/setup-camif.c Normal file
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@ -0,0 +1,70 @@
/*
* 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);
}
}