Sylwester Nawrocki wrote:
>
> 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.nawro...@gmail.com>
> ---
> arch/arm/mach-s3c24xx/Kconfig | 1 +
> arch/arm/plat-samsung/Kconfig | 5 ++
> arch/arm/plat-samsung/Makefile | 1 +
> arch/arm/plat-samsung/setup-camif.c | 70
> +++++++++++++++++++++++++++++++++++
> 4 files changed, 77 insertions(+), 0 deletions(-)
> create mode 100644 arch/arm/plat-samsung/setup-camif.c
>
> diff --git a/arch/arm/mach-s3c24xx/Kconfig b/arch/arm/mach-s3c24xx/Kconfig
> index 2b6cb5f..01f70c9 100644
> --- a/arch/arm/mach-s3c24xx/Kconfig
> +++ b/arch/arm/mach-s3c24xx/Kconfig
> @@ -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.
> diff --git a/arch/arm/plat-samsung/Kconfig b/arch/arm/plat-samsung/Kconfig
> index 59401e1..95360e6 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 9e40e8d..3a7c64d 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 0000000..e01bf76
> --- /dev/null
> +++ b/arch/arm/plat-samsung/setup-camif.c
> @@ -0,0 +1,70 @@
> +/*
> + * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawro...@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);
> + }
> +}
> --
> 1.7.4.1
Yes, we can move on using pinctrl later when it is available. OK, applied.
Thanks.
K-Gene <kg...@kernel.org>
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