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+/*
+ * Samsung EXYNOS4x12 FIMC-IS (Imaging Subsystem) driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ *
+ * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
+ *
+ * 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/module.h>
+#include <linux/of_i2c.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/clk.h>
+#include "fimc-is-i2c.h"
+
+struct fimc_is_i2c {
+ struct i2c_adapter adapter;
+ struct clk *clock;
+};
+
+/*
+ * An empty algorithm is used as the actual I2C bus controller driver
+ * is implemented in the FIMC-IS subsystem firmware and the host CPU
+ * doesn't access the I2C bus controller.
+ */
+static const struct i2c_algorithm fimc_is_i2c_algorithm;
+
+static int fimc_is_i2c_probe(struct platform_device *pdev)
+{
+ struct device_node *node = pdev->dev.of_node;
+ struct fimc_is_i2c *isp_i2c;
+ struct i2c_adapter *i2c_adap;
+ int ret;
+
+ isp_i2c = devm_kzalloc(&pdev->dev, sizeof(*isp_i2c), GFP_KERNEL);
+ if (!isp_i2c)
+ return -ENOMEM;
+
+ isp_i2c->clock = devm_clk_get(&pdev->dev, "i2c_isp");
+ if (IS_ERR(isp_i2c->clock)) {
+ dev_err(&pdev->dev, "failed to get the clock\n");
+ return PTR_ERR(isp_i2c->clock);
+ }
+
+ i2c_adap = &isp_i2c->adapter;
+ i2c_adap->dev.of_node = node;
+ i2c_adap->dev.parent = &pdev->dev;
+ strlcpy(i2c_adap->name, "exynos4x12-isp-i2c", sizeof(i2c_adap->name));
+ i2c_adap->owner = THIS_MODULE;
+ i2c_adap->algo = &fimc_is_i2c_algorithm;
+ i2c_adap->class = I2C_CLASS_SPD;
+
+ ret = i2c_add_adapter(i2c_adap);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to add I2C bus %s\n",
+ node->full_name);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, isp_i2c);
+
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_enable(&i2c_adap->dev);
+
+ of_i2c_register_devices(i2c_adap);
+
+ return 0;
+}
+
+static int fimc_is_i2c_remove(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static int fimc_is_i2c_suspend(struct device *dev)
+{
+ struct fimc_is_i2c *isp_i2c = dev_get_drvdata(dev);
+ clk_disable_unprepare(isp_i2c->clock);
+ return 0;
+}
+
+static int fimc_is_i2c_resume(struct device *dev)
+{
+ struct fimc_is_i2c *isp_i2c = dev_get_drvdata(dev);
+ return clk_prepare_enable(isp_i2c->clock);
+}
+
+UNIVERSAL_DEV_PM_OPS(fimc_is_i2c_pm_ops, fimc_is_i2c_suspend,
+ fimc_is_i2c_resume, NULL);
+
+static const struct of_device_id fimc_is_i2c_of_match[] = {
+ { .compatible = FIMC_IS_I2C_COMPATIBLE },
+ { },
+};
+MODULE_DEVICE_TABLE(of, fimc_is_i2c_of_match);
+
+static struct platform_driver fimc_is_i2c_driver = {
+ .probe = fimc_is_i2c_probe,
+ .remove = fimc_is_i2c_remove,
+ .driver = {
+ .of_match_table = fimc_is_i2c_of_match,
+ .name = "fimc-isp-i2c",
+ .owner = THIS_MODULE,
+ .pm = &fimc_is_i2c_pm_ops,
+ }
+};
+
+int fimc_is_register_i2c_driver(void)
+{
+ return platform_driver_register(&fimc_is_i2c_driver);
+}
+
+void fimc_is_unregister_i2c_driver(void)
+{
+ platform_driver_unregister(&fimc_is_i2c_driver);
+}
+
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+/*
+ * Samsung EXYNOS4x12 FIMC-IS (Imaging Subsystem) driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Sylwester Nawrocki <s.nawrocki@samsung.com>
+ *
+ * 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.
+ */
+
+#define FIMC_IS_I2C_COMPATIBLE "samsung,exynos4212-i2c-isp"
+
+int fimc_is_register_i2c_driver(void);
+void fimc_is_unregister_i2c_driver(void);