diff options
| author | Sylwester Nawrocki <sylvester.nawrocki@gmail.com> | 2012-11-22 09:29:18 +0400 |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2012-11-28 03:03:27 +0400 |
| commit | e51d5486a9940e22aa5034bc26cf10ea63ca0b7c (patch) | |
| tree | d1f6a5aa9ca7305e8d1fe32036eb631e1a2e681e /arch/arm/plat-samsung | |
| parent | f4a75d2eb7b1e2206094b901be09adb31ba63681 (diff) | |
| download | linux-e51d5486a9940e22aa5034bc26cf10ea63ca0b7c.tar.xz | |
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: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm/plat-samsung')
| -rw-r--r-- | arch/arm/plat-samsung/Kconfig | 5 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/setup-camif.c | 70 |
3 files changed, 76 insertions, 0 deletions
diff --git a/arch/arm/plat-samsung/Kconfig b/arch/arm/plat-samsung/Kconfig index 59401e1cc530..95360e679f4e 100644 --- a/arch/arm/plat-samsung/Kconfig +++ b/arch/arm/plat-samsung/Kconfig @@ -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 diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile index 9e40e8d00740..3a7c64d1814a 100644 --- a/arch/arm/plat-samsung/Makefile +++ b/arch/arm/plat-samsung/Makefile @@ -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 diff --git a/arch/arm/plat-samsung/setup-camif.c b/arch/arm/plat-samsung/setup-camif.c new file mode 100644 index 000000000000..e01bf760af2c --- /dev/null +++ b/arch/arm/plat-samsung/setup-camif.c @@ -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); + } +} |