On 03/06/2013 12:53 PM, Shaik Ameer Basha wrote:
This patch adds support for media device for EXYNOS5 SoCs.
The current media device supports the following ips to connect
through the media controller framework.
* MIPI-CSIS
Support interconnection(subdev interface) between devices
* FIMC-LITE
Support capture interface from device(Sensor, MIPI-CSIS) to memory
Support interconnection(subdev interface) between devices
G-Scaler will be added later to the current media device.
* Gscaler: general scaler
Support memory to memory interface
Support output interface from memory to display device(LCD, TV)
Support capture interface from device(FIMC-LITE, FIMD) to memory
--> media 0
Camera Capture path consists of MIPI-CSIS, FIMC-LITE and G-Scaler
+--------+ +-----------+ +-----------------+
| Sensor | --> | FIMC-LITE | --> | G-Scaler-capture |
+--------+ +-----------+ +-----------------+
+--------+ +-----------+ +-----------+ +-----------------+
| Sensor | --> | MIPI-CSIS | --> | FIMC-LITE | --> | G-Scaler-capture |
+--------+ +-----------+ +-----------+ +-----------------+
Signed-off-by: Shaik Ameer Basha<shaik.am...@samsung.com>
---
drivers/media/platform/Kconfig | 1 +
drivers/media/platform/Makefile | 1 +
drivers/media/platform/exynos5-is/Kconfig | 7 +
drivers/media/platform/exynos5-is/Makefile | 4 +
drivers/media/platform/exynos5-is/exynos5-mdev.c | 1309 ++++++++++++++++++++++
drivers/media/platform/exynos5-is/exynos5-mdev.h | 107 ++
6 files changed, 1429 insertions(+)
create mode 100644 drivers/media/platform/exynos5-is/Kconfig
create mode 100644 drivers/media/platform/exynos5-is/Makefile
create mode 100644 drivers/media/platform/exynos5-is/exynos5-mdev.c
create mode 100644 drivers/media/platform/exynos5-is/exynos5-mdev.h
...
diff --git a/drivers/media/platform/exynos5-is/exynos5-mdev.c
b/drivers/media/platform/exynos5-is/exynos5-mdev.c
new file mode 100644
index 0000000..1158696
--- /dev/null
+++ b/drivers/media/platform/exynos5-is/exynos5-mdev.c
@@ -0,0 +1,1309 @@
+/*
+ * S5P/EXYNOS4 SoC series camera host interface media device driver
EXYNOS5
+ * Copyright (C) 2011 - 2012 Samsung Electronics Co., Ltd.
+ * Sylwester Nawrocki<s.nawro...@samsung.com>
This is incorrect too, you should add your authorship and a note it
is based on other code, with a proper copyright notice.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation, either version 2 of the License,
+ * or (at your option) any later version.
+ */
+
+#include<linux/bug.h>
+#include<linux/device.h>
+#include<linux/errno.h>
+#include<linux/i2c.h>
+#include<linux/kernel.h>
+#include<linux/list.h>
+#include<linux/module.h>
+#include<linux/of.h>
+#include<linux/of_platform.h>
+#include<linux/of_device.h>
+#include<linux/of_i2c.h>
+#include<linux/pinctrl/consumer.h>
+#include<linux/platform_device.h>
+#include<linux/pm_runtime.h>
+#include<linux/types.h>
+#include<linux/slab.h>
+#include<media/v4l2-ctrls.h>
+#include<media/v4l2-of.h>
+#include<media/media-device.h>
+
+#include "exynos5-mdev.h"
+
+#define dbg(fmt, args...) \
+ pr_debug("%s:%d: " fmt "\n", __func__, __LINE__, ##args)
+
+static struct fimc_md *g_exynos_mdev;
+
+static int fimc_md_set_camclk(struct v4l2_subdev *sd, bool on);
+static int __fimc_md_set_camclk(struct fimc_md *fmd,
+ struct fimc_sensor_info *s_info,
+ bool on);
+/**
+ * fimc_pipeline_prepare - update pipeline information with subdevice pointers
+ * @fimc: fimc device terminating the pipeline
+ *
+ * Caller holds the graph mutex.
+ */
+static void fimc_pipeline_prepare(struct exynos5_pipeline0 *p,
+ struct media_entity *me)
+{
+ struct media_pad *pad =&me->pads[0];
This will need to be changed to support subdevs with more than 2 pads.
I should post relevant patch this week.
+ struct v4l2_subdev *sd;
+ int i;
+
+ for (i = 0; i< IDX_MAX; i++)
+ p->subdevs[i] = NULL;
+
+ while (1) {
+
+ if (!(pad->flags& MEDIA_PAD_FL_SINK))
+ break;
+
+ /* source pad */
+ pad = media_entity_remote_source(pad);
+
+ if (pad != NULL)
+ pr_err("entity type: %d, entity name: %s\n",
+ media_entity_type(pad->entity), pad->entity->name);
+
+ if (pad == NULL ||
+ media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
+ break;
+
+ sd = media_entity_to_v4l2_subdev(pad->entity);
+
+ switch (sd->grp_id) {
+ case GRP_ID_FIMC_IS_SENSOR:
+ case GRP_ID_SENSOR:
+ p->subdevs[IDX_SENSOR] = sd;
+ break;
+ case GRP_ID_CSIS:
+ p->subdevs[IDX_CSIS] = sd;
+ break;
+ case GRP_ID_FLITE:
+ p->subdevs[IDX_FLITE] = sd;
+ break;
+ default:
+ pr_warn("%s: Unknown subdev grp_id: %#x\n",
+ __func__, sd->grp_id);
+ }
+
+ /* sink pad */
+ pad =&sd->entity.pads[0];
+ }
+}
...
+/*
+ * Sensor subdevice helper functions
+ */
+static struct v4l2_subdev *fimc_md_register_sensor(struct fimc_md *fmd,
+ struct fimc_sensor_info *s_info)
+{
+ struct i2c_adapter *adapter;
+ struct v4l2_subdev *sd = NULL;
+
+ if (!s_info || !fmd)
+ return NULL;
+
+ adapter = i2c_get_adapter(s_info->pdata.i2c_bus_num);
+ if (!adapter) {
+ v4l2_warn(&fmd->v4l2_dev,
+ "Failed to get I2C adapter %d, deferring probe\n",
+ s_info->pdata.i2c_bus_num);
+ return ERR_PTR(-EPROBE_DEFER);
+ }
+ sd = v4l2_i2c_new_subdev_board(&fmd->v4l2_dev, adapter,
+ s_info->pdata.board_info, NULL);
+ if (IS_ERR_OR_NULL(sd)) {
+ i2c_put_adapter(adapter);
+ v4l2_warn(&fmd->v4l2_dev,
+ "Failed to acquire subdev %s, deferring probe\n",
+ s_info->pdata.board_info->type);
+ return ERR_PTR(-EPROBE_DEFER);
+ }
+ v4l2_set_subdev_hostdata(sd, s_info);
+ sd->grp_id = GRP_ID_SENSOR;
+
+ v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice %s\n",
+ sd->name);
+ return sd;
+}
+
+static void fimc_md_unregister_sensor(struct v4l2_subdev *sd)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct i2c_adapter *adapter;
+
+ if (!client)
+ return;
+ v4l2_device_unregister_subdev(sd);
+
+ if (!client->dev.of_node) {
+ adapter = client->adapter;
+ i2c_unregister_device(client);
+ if (adapter)
+ i2c_put_adapter(adapter);
+ }
+}
You don't need the above code which is for !CONFIG_OF only.
+#ifdef CONFIG_OF
Just add "depends on OF" in Kconfig for the whole driver and
you can drop all #ifdef CONFIG_OF.
+/* Register I2C client subdev associated with @node. */
+static int fimc_md_of_add_sensor(struct fimc_md *fmd,
+ struct device_node *node, int index)
+{
+ struct fimc_sensor_info *si;
+ struct i2c_client *client;
+ struct v4l2_subdev *sd;
+ int ret;
+
+ if (WARN_ON(index>= ARRAY_SIZE(fmd->sensor)))
+ return -EINVAL;
+
+ si =&fmd->sensor[index];
+
+ client = of_find_i2c_device_by_node(node);
+ if (!client)
+ return -EPROBE_DEFER;
+
+ device_lock(&client->dev);
+
+ if (!client->driver ||
+ !try_module_get(client->driver->driver.owner)) {
+ ret = -EPROBE_DEFER;
+ goto dev_put;
+ }
+
+ /* Enable sensor's master clock */
+ ret = __fimc_md_set_camclk(fmd, si, true);
+ if (ret< 0)
+ goto mod_put;
+
+ sd = i2c_get_clientdata(client);
+
+ ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
+ __fimc_md_set_camclk(fmd, si, false);
+ if (ret< 0)
+ goto mod_put;
+
+ v4l2_set_subdev_hostdata(sd, si);
+ sd->grp_id = GRP_ID_SENSOR;
+ si->subdev = sd;
+ v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice: %s (%d)\n",
+ sd->name, fmd->num_sensors);
+ fmd->num_sensors++;
+
+mod_put:
+ module_put(client->driver->driver.owner);
+dev_put:
+ device_unlock(&client->dev);
+ put_device(&client->dev);
+ return ret;
+}
...
+#else
+#define fimc_md_of_sensors_register(fmd, np) (-ENOSYS)
This would never be used since Exynos5 is a dt-only platform.
+#endif
+
+static int fimc_md_register_sensor_entities(struct fimc_md *fmd)
+{
+ struct s5p_platform_fimc *pdata = fmd->pdev->dev.platform_data;
+ struct device_node *of_node = fmd->pdev->dev.of_node;
+ int num_clients = 0;
+ int ret, i;
+
+ if (of_node) {
+ fmd->num_sensors = 0;
+ ret = fimc_md_of_sensors_register(fmd, of_node);
+ } else if (pdata) {
The code below is for !CONFIG_OF only, no need to repeat it for Exynos5.
+ WARN_ON(pdata->num_clients> ARRAY_SIZE(fmd->sensor));
+ num_clients = min_t(u32, pdata->num_clients,
+ ARRAY_SIZE(fmd->sensor));
+ fmd->num_sensors = num_clients;
+
+ fmd->num_sensors = num_clients;
+ for (i = 0; i< num_clients; i++) {
+ struct v4l2_subdev *sd;
+
+ fmd->sensor[i].pdata = pdata->source_info[i];
+ ret = __fimc_md_set_camclk(fmd,&fmd->sensor[i], true);
+ if (ret)
+ break;
+ sd = fimc_md_register_sensor(fmd,&fmd->sensor[i]);
+ ret = __fimc_md_set_camclk(fmd,&fmd->sensor[i], false);
+
+ if (IS_ERR(sd)) {
+ fmd->sensor[i].subdev = NULL;
+ ret = PTR_ERR(sd);
+ break;
+ }
+ fmd->sensor[i].subdev = sd;
+ if (ret)
+ break;
+ }
+ }
+
+ return ret;
+}
+
+/*
+ * MIPI-CSIS, FIMC and FIMC-LITE platform devices registration.
+ */
+
+static int register_fimc_lite_entity(struct fimc_md *fmd,
+ struct fimc_lite *fimc_lite)
+{
+ struct v4l2_subdev *sd;
+ int ret;
+
+ if (WARN_ON(fimc_lite->index>= FIMC_LITE_MAX_DEVS ||
+ fmd->fimc_lite[fimc_lite->index]))
+ return -EBUSY;
+
+ sd =&fimc_lite->subdev;
+ sd->grp_id = GRP_ID_FLITE;
+ v4l2_set_subdev_hostdata(sd, (void *)&exynos5_pipeline0_ops);
+
+ ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
+ if (!ret)
+ fmd->fimc_lite[fimc_lite->index] = fimc_lite;
+ else
+ v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.LITE%d\n",
+ fimc_lite->index);
+ return ret;
+}
+
+static int register_csis_entity(struct fimc_md *fmd,
+ struct platform_device *pdev,
+ struct v4l2_subdev *sd)
+{
+ struct device_node *node = pdev->dev.of_node;
+ int id, ret;
+
+ id = node ? of_alias_get_id(node, "csis") : max(0, pdev->id);
+
+ if (WARN_ON(id>= CSIS_MAX_ENTITIES || fmd->csis[id].sd))
+ return -EBUSY;
+
+ if (WARN_ON(id>= CSIS_MAX_ENTITIES))
+ return 0;
+
+ sd->grp_id = GRP_ID_CSIS;
+ ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
+ if (!ret)
+ fmd->csis[id].sd = sd;
+ else
+ v4l2_err(&fmd->v4l2_dev,
+ "Failed to register MIPI-CSIS.%d (%d)\n", id, ret);
+
+ return ret;
+}
+
+static int fimc_md_register_platform_entity(struct fimc_md *fmd,
+ struct platform_device *pdev,
+ int plat_entity)
+{
+ struct device *dev =&pdev->dev;
+ int ret = -EPROBE_DEFER;
+ void *drvdata;
+
+ /* Lock to ensure dev->driver won't change. */
+ device_lock(dev);
+
+ if (!dev->driver || !try_module_get(dev->driver->owner))
+ goto dev_unlock;
+
+ drvdata = dev_get_drvdata(dev);
+ /* Some subdev didn't probe succesfully id drvdata is NULL */
+ if (drvdata) {
+ switch (plat_entity) {
+ case IDX_FLITE:
+ ret = register_fimc_lite_entity(fmd, drvdata);
+ break;
+ case IDX_CSIS:
+ ret = register_csis_entity(fmd, pdev, drvdata);
+ break;
+ default:
+ ret = -ENODEV;
+ }
+ }
+
+ module_put(dev->driver->owner);
+dev_unlock:
+ device_unlock(dev);
+ if (ret == -EPROBE_DEFER)
+ dev_info(&fmd->pdev->dev, "deferring %s device registration\n",
+ dev_name(dev));
+ else if (ret< 0)
+ dev_err(&fmd->pdev->dev, "%s device registration failed (%d)\n",
+ dev_name(dev), ret);
+ return ret;
+}
+
+static int fimc_md_pdev_match(struct device *dev, void *data)
This function is also useless in your case.
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ int plat_entity = -1;
+ int ret;
+
+ if (!get_device(dev))
+ return -ENODEV;
+
+ if (!strcmp(pdev->name, CSIS_DRIVER_NAME))
+ plat_entity = IDX_CSIS;
+ else if (!strcmp(pdev->name, FIMC_LITE_DRV_NAME))
+ plat_entity = IDX_FLITE;
+
+ if (plat_entity>= 0)
+ ret = fimc_md_register_platform_entity(data, pdev,
+ plat_entity);
+ put_device(dev);
+ return 0;
+}
+
+/* Register FIMC, FIMC-LITE and CSIS media entities */
+#ifdef CONFIG_OF
+static int fimc_md_register_of_platform_entities(struct fimc_md *fmd,
+ struct device_node *parent)
+{
+ struct device_node *node;
+ int ret = 0;
+
+ for_each_available_child_of_node(parent, node) {
+ struct platform_device *pdev;
+ int plat_entity = -1;
+
+ pdev = of_find_device_by_node(node);
+ if (!pdev)
+ continue;
+
+ /* If driver of any entity isn't ready try all again later. */
+ if (!strcmp(node->name, CSIS_OF_NODE_NAME))
+ plat_entity = IDX_CSIS;
+ else if (!strcmp(node->name, FIMC_LITE_OF_NODE_NAME))
+ plat_entity = IDX_FLITE;
+
+ if (plat_entity>= 0)
+ ret = fimc_md_register_platform_entity(fmd, pdev,
+ plat_entity);
+ put_device(&pdev->dev);
+ if (ret< 0)
+ break;
+ }
+
+ return ret;
+}
+#else
+#define fimc_md_register_platform_entities(fmd) (-ENOSYS)
+#endif
...
+static int fimc_md_link_notify(struct media_pad *source,
+ struct media_pad *sink, u32 flags)
+{
+ struct fimc_lite *fimc_lite = NULL;
+ struct exynos_pipeline *pipeline;
+ struct exynos5_pipeline0 *p;
+ struct v4l2_subdev *sd;
+ struct mutex *lock;
+ int ret = 0;
+ int ref_count;
+
+ if (media_entity_type(sink->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
+ return 0;
+
+ sd = media_entity_to_v4l2_subdev(sink->entity);
+
+ switch (sd->grp_id) {
+ case GRP_ID_FLITE:
+ fimc_lite = v4l2_get_subdevdata(sd);
+ if (WARN_ON(fimc_lite == NULL))
+ return 0;
+ pipeline =&fimc_lite->pipeline;
+ lock =&fimc_lite->lock;
+ break;
+ default:
+ return 0;
+ }
+
+ p = (struct exynos5_pipeline0 *)pipeline->priv;
+ if (!p || !p->is_init)
+ return -EINVAL;
+
+ if (!(flags& MEDIA_LNK_FL_ENABLED)) {
+ int i;
+ mutex_lock(lock);
ref_count needs to be checked here as well.
+ ret = __fimc_pipeline_close(pipeline);
+ for (i = 0; i< IDX_MAX; i++)
+ p->subdevs[i] = NULL;
+ mutex_unlock(lock);
+ return ret;
+ }
+ /*
+ * Link activation. Enable power of pipeline elements only if the
+ * pipeline is already in use, i.e. its video node is opened.
+ * Recreate the controls destroyed during the link deactivation.
I think this line should be deleted.
+ */
+ mutex_lock(lock);
+
+ ref_count = fimc_lite->ref_count;
+ if (ref_count> 0)
+ ret = __fimc_pipeline_open(pipeline, source->entity, true);
+
+ mutex_unlock(lock);
+ return ret ? -EPIPE : ret;
+}
+
+static ssize_t fimc_md_sysfs_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct fimc_md *fmd = platform_get_drvdata(pdev);
+
+ if (fmd->user_subdev_api)
+ return strlcpy(buf, "Sub-device API (sub-dev)\n", PAGE_SIZE);
+
+ return strlcpy(buf, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE);
+}
+
+static ssize_t fimc_md_sysfs_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct fimc_md *fmd = platform_get_drvdata(pdev);
+ bool subdev_api;
+ int i;
+
+ if (!strcmp(buf, "vid-dev\n"))
+ subdev_api = false;
+ else if (!strcmp(buf, "sub-dev\n"))
+ subdev_api = true;
+ else
+ return count;
+
+ fmd->user_subdev_api = subdev_api;
+ for (i = 0; i< FIMC_LITE_MAX_DEVS; i++)
+ if (fmd->fimc_lite[i])
+ fmd->fimc_lite[i]->user_subdev_api = subdev_api;
+
+ return count;
+}
+/*
+ * This device attribute is to select video pipeline configuration method.
+ * There are following valid values:
+ * vid-dev - for V4L2 video node API only, subdevice will be configured
+ * by the host driver.
+ * sub-dev - for media controller API, subdevs must be configured in user
+ * space before starting streaming.
+ */
+static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO,
+ fimc_md_sysfs_show, fimc_md_sysfs_store);
Please don't copy that. It is a not standard attribute that you should not
need in this driver anyway.
+/**
+ * fimc_md_sensor_notify - v4l2_device notification from a sensor subdev
+ * @sd: pointer to a subdev generating the notification
+ * @notification: the notification type, must be S5P_FIMC_TX_END_NOTIFY
+ * @arg: pointer to an u32 type integer that stores the frame payload value
+ *
+ * Passes the sensor notification to the capture device
+ */
+static void fimc_md_sensor_notify(struct v4l2_subdev *sd,
+ unsigned int notification, void *arg)
+{
+ struct fimc_md *fmd;
+ struct exynos_pipeline *ep;
+ struct exynos5_pipeline0 *p;
+ unsigned long flags;
+
+ if (sd == NULL)
+ return;
+
+ ep = media_pipe_to_exynos_pipeline(sd->entity.pipe);
+ p = (struct exynos5_pipeline0 *)ep->priv;
+
+ spin_lock_irqsave(&fmd->slock, flags);
+
+ if (p->sensor_notify)
+ p->sensor_notify(sd, notification, arg);
+
+ spin_unlock_irqrestore(&fmd->slock, flags);
+}
+
+static int fimc_md_probe(struct platform_device *pdev)
+{
+ struct device *dev =&pdev->dev;
+ struct v4l2_device *v4l2_dev;
+ struct fimc_md *fmd;
+ int ret;
+
+ fmd = devm_kzalloc(dev, sizeof(*fmd), GFP_KERNEL);
+ if (!fmd)
+ return -ENOMEM;
+
+ spin_lock_init(&fmd->slock);
+ fmd->pdev = pdev;
+
+ strlcpy(fmd->media_dev.model, "SAMSUNG S5P FIMC",
Please change this to "SAMSUNG EXYNOS5 IS" or something similar.
This could confuse user space!
+ sizeof(fmd->media_dev.model));
+ fmd->media_dev.link_notify = fimc_md_link_notify;
+ fmd->media_dev.dev = dev;
+
+ v4l2_dev =&fmd->v4l2_dev;
+ v4l2_dev->mdev =&fmd->media_dev;
+ v4l2_dev->notify = fimc_md_sensor_notify;
+ strlcpy(v4l2_dev->name, "s5p-fimc-md", sizeof(v4l2_dev->name));
exynos-fimc-md ?
+
+ ret = v4l2_device_register(dev,&fmd->v4l2_dev);
+ if (ret< 0) {
+ v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret);
+
+ return ret;
+
+ }
+ ret = media_device_register(&fmd->media_dev);
+ if (ret< 0) {
+ v4l2_err(v4l2_dev, "Failed to register media dev: %d\n", ret);
+ goto err_md;
+ }
+ ret = fimc_md_get_clocks(fmd);
+ if (ret)
+ goto err_clk;
+
+ fmd->user_subdev_api = (dev->of_node != NULL);
+ g_exynos_mdev = fmd;
+
+ /* Protect the media graph while we're registering entities */
+ mutex_lock(&fmd->media_dev.graph_mutex);
+
+ if (fmd->pdev->dev.of_node)
+ ret = fimc_md_register_of_platform_entities(fmd, dev->of_node);
+ else
+ ret = bus_for_each_dev(&platform_bus_type, NULL, fmd,
+ fimc_md_pdev_match);
+
+ if (ret)
+ goto err_unlock;
+
+ if (dev->platform_data || dev->of_node) {
platform_data will never be used, and dev->of_node would be always not NULL.
+ ret = fimc_md_register_sensor_entities(fmd);
+ if (ret)
+ goto err_unlock;
+ }
+
+ ret = fimc_md_create_links(fmd);
+ if (ret)
+ goto err_unlock;
+
+ ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev);
+ if (ret)
+ goto err_unlock;
+
+ ret = device_create_file(&pdev->dev,&dev_attr_subdev_conf_mode);
+ if (ret)
+ goto err_unlock;
+
+ platform_set_drvdata(pdev, fmd);
+ mutex_unlock(&fmd->media_dev.graph_mutex);
+ return 0;
+
+err_unlock:
+ mutex_unlock(&fmd->media_dev.graph_mutex);
+err_clk:
+ media_device_unregister(&fmd->media_dev);
+ fimc_md_put_clocks(fmd);
+ fimc_md_unregister_entities(fmd);
+err_md:
+ v4l2_device_unregister(&fmd->v4l2_dev);
+ return ret;
+}
+
...
+static struct platform_device_id fimc_driver_ids[] __always_unused = {
+ { .name = "exynos-fimc-md" },
+ { },
+};
+MODULE_DEVICE_TABLE(platform, fimc_driver_ids);
+
+static const struct of_device_id fimc_md_of_match[] __initconst = {
The attribute is wrong. I would remove that "__initconst".
+ { .compatible = "samsung,exynos5-fimc" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, fimc_md_of_match);
+
--
Regards,
Sylwester
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