mddi_client_dummy.c

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/* drivers/video/msm_fb/mddi_client_dummy.c
 *
 * Support for "dummy" mddi client devices which require no
 * special initialization code.
 *
 * Copyright (C) 2007 Google Incorporated
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>

#include <linux/platform_data/video-msm_fb.h>

struct panel_info {
    struct platform_device pdev;
    struct msm_panel_data panel_data;
};

static int mddi_dummy_suspend(struct msm_panel_data *panel_data)
{
    return 0;
}

static int mddi_dummy_resume(struct msm_panel_data *panel_data)
{
    return 0;
}

static int mddi_dummy_blank(struct msm_panel_data *panel_data)
{
    return 0;
}

static int mddi_dummy_unblank(struct msm_panel_data *panel_data)
{
    return 0;
}

static int mddi_dummy_probe(struct platform_device *pdev)
{
    struct msm_mddi_client_data *client_data = pdev->dev.platform_data;
    struct panel_info *panel =
        kzalloc(sizeof(struct panel_info), GFP_KERNEL);
    int ret;
    if (!panel)
        return -ENOMEM;
    platform_set_drvdata(pdev, panel);
    panel->panel_data.suspend = mddi_dummy_suspend;
    panel->panel_data.resume = mddi_dummy_resume;
    panel->panel_data.blank = mddi_dummy_blank;
    panel->panel_data.unblank = mddi_dummy_unblank;
    panel->panel_data.caps = MSMFB_CAP_PARTIAL_UPDATES;
    panel->pdev.name = "msm_panel";
    panel->pdev.id = pdev->id;
    platform_device_add_resources(&panel->pdev,
                      client_data->fb_resource, 1);
    panel->panel_data.fb_data = client_data->private_client_data;
    panel->pdev.dev.platform_data = &panel->panel_data;
    ret = platform_device_register(&panel->pdev);
    if (ret) {
        kfree(panel);
        return ret;
    }
    return 0;
}

static int mddi_dummy_remove(struct platform_device *pdev)
{
    struct panel_info *panel = platform_get_drvdata(pdev);
    kfree(panel);
    return 0;
}

static struct platform_driver mddi_client_dummy = {
    .probe = mddi_dummy_probe,
    .remove = mddi_dummy_remove,
    .driver = { .name = "mddi_c_dummy" },
};

static int __init mddi_client_dummy_init(void)
{
    platform_driver_register(&mddi_client_dummy);
    return 0;
}

module_init(mddi_client_dummy_init);