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