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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-06-04 GuEe-GUI the first version
*/
#include <rtthread.h>
#define DBG_TAG "drv.platform"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#include <drivers/platform.h>
#include <drivers/core/dm.h>
static const struct rt_ofw_node_id platform_ofw_ids[] =
{
{ .compatible = "simple-bus", },
#ifdef RT_USING_MFD
{ .compatible = "simple-mfd", },
#endif
#ifdef RT_USING_ISA
{ .compatible = "isa", },
#endif
#ifdef RT_USING_AMBA_BUS
/*
* Maybe ARM has replaced it with compatible: "arm,primecell" and will not
* used anymore in the future.
*/
{ .compatible = "arm,amba-bus", },
#endif
{ /* sentinel */ }
};
static rt_err_t platform_ofw_device_probe_once(struct rt_ofw_node *parent_np)
{
rt_err_t err = RT_EOK;
struct rt_ofw_node *np, *child;
struct rt_platform_device *pdev;
rt_ofw_foreach_available_child_node(parent_np, np)
{
const char *name;
struct rt_ofw_node_id *id;
struct rt_ofw_prop *compat_prop = RT_NULL;
/* Is system node or have driver */
if (rt_ofw_node_test_flag(np, RT_OFW_F_SYSTEM) ||
rt_ofw_node_test_flag(np, RT_OFW_F_READLY))
{
continue;
}
compat_prop = rt_ofw_get_prop(np, "compatible", RT_NULL);
name = rt_ofw_node_name(np);
/* Not have name and compatible */
if (!compat_prop && (name == (const char *)"<NULL>" || !rt_strcmp(name, "<NULL>")))
{
continue;
}
id = rt_ofw_prop_match(compat_prop, platform_ofw_ids);
if (id && (child = rt_ofw_get_next_child(np, RT_NULL)))
{
/* scan next level */
err = platform_ofw_device_probe_once(child);
rt_ofw_node_put(child);
if (err)
{
LOG_E("%s bus probe fail", np->full_name);
break;
}
}
pdev = rt_platform_device_alloc(np->name);
if (!pdev)
{
err = -RT_ENOMEM;
break;
}
/* inc reference of dt-node */
rt_ofw_node_get(np);
rt_ofw_node_set_flag(np, RT_OFW_F_PLATFORM);
pdev->parent.ofw_node = np;
rt_platform_device_register(pdev);
}
return err;
}
static int platform_ofw_device_probe(void)
{
rt_err_t err = RT_EOK;
struct rt_ofw_node *root_np;
root_np = rt_ofw_find_node_by_path("/");
if (root_np)
{
err = platform_ofw_device_probe_once(root_np);
rt_ofw_node_put(root_np);
}
else
{
err = -RT_ENOSYS;
}
return (int)err;
}
INIT_PLATFORM_EXPORT(platform_ofw_device_probe);
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