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/*
* omap-ocp2scp.c - transform ocp interface protocol to scp protocol
*
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
* 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.
*
* Author: Kishon Vijay Abraham I <kishon@ti.com>
*
* 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/module.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_data/omap_ocp2scp.h>
/**
* _count_resources - count for the number of resources
* @res: struct resource *
*
* Count and return the number of resources populated for the device that is
* connected to ocp2scp.
*/
static unsigned _count_resources(struct resource *res)
{
int cnt = 0;
while (res->start != res->end) {
cnt++;
res++;
}
return cnt;
}
static int ocp2scp_remove_devices(struct device *dev, void *c)
{
struct platform_device *pdev = to_platform_device(dev);
platform_device_unregister(pdev);
return 0;
}
static int omap_ocp2scp_probe(struct platform_device *pdev)
{
int ret;
unsigned res_cnt, i;
struct device_node *np = pdev->dev.of_node;
struct platform_device *pdev_child;
struct omap_ocp2scp_platform_data *pdata = pdev->dev.platform_data;
struct omap_ocp2scp_dev *dev;
if (np) {
ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
if (ret) {
dev_err(&pdev->dev,
"failed to add resources for ocp2scp child\n");
goto err0;
}
} else if (pdata) {
for (i = 0, dev = *pdata->devices; i < pdata->dev_cnt; i++,
dev++) {
res_cnt = _count_resources(dev->res);
pdev_child = platform_device_alloc(dev->drv_name,
PLATFORM_DEVID_AUTO);
if (!pdev_child) {
dev_err(&pdev->dev,
"failed to allocate mem for ocp2scp child\n");
goto err0;
}
ret = platform_device_add_resources(pdev_child,
dev->res, res_cnt);
if (ret) {
dev_err(&pdev->dev,
"failed to add resources for ocp2scp child\n");
goto err1;
}
pdev_child->dev.parent = &pdev->dev;
ret = platform_device_add(pdev_child);
if (ret) {
dev_err(&pdev->dev,
"failed to register ocp2scp child device\n");
goto err1;
}
}
} else {
dev_err(&pdev->dev, "OCP2SCP initialized without plat data\n");
return -EINVAL;
}
pm_runtime_enable(&pdev->dev);
return 0;
err1:
platform_device_put(pdev_child);
err0:
device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);
return ret;
}
static int omap_ocp2scp_remove(struct platform_device *pdev)
{
pm_runtime_disable(&pdev->dev);
device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id omap_ocp2scp_id_table[] = {
{ .compatible = "ti,omap-ocp2scp" },
{}
};
MODULE_DEVICE_TABLE(of, omap_ocp2scp_id_table);
#endif
static struct platform_driver omap_ocp2scp_driver = {
.probe = omap_ocp2scp_probe,
.remove = omap_ocp2scp_remove,
.driver = {
.name = "omap-ocp2scp",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(omap_ocp2scp_id_table),
},
};
module_platform_driver(omap_ocp2scp_driver);
MODULE_ALIAS("platform: omap-ocp2scp");
MODULE_AUTHOR("Texas Instruments Inc.");
MODULE_DESCRIPTION("OMAP OCP2SCP driver");
MODULE_LICENSE("GPL v2");
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