1 files changed, 67 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c24xx/setup-camif.c b/arch/arm/mach-s3c24xx/setup-camif.c
new file mode 100644
index 000000000..2b262fae3
--- /dev/null
+++ b/arch/arm/mach-s3c24xx/setup-camif.c
@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
+//
+// Helper functions for S3C24XX/S3C64XX SoC series CAMIF driver
+
+#include <linux/gpio.h>
+#include <plat/gpio-cfg.h>
+#include <mach/gpio-samsung.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);
+	}
+}