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1f359e3611
Allow the caller to find out the device that was bound in response to this call. Signed-off-by: Simon Glass <sjg@chromium.org>
155 lines
2.7 KiB
C
155 lines
2.7 KiB
C
/*
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* Copyright (c) 2013 Google, Inc
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*
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* (C) Copyright 2012
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* Pavel Herrmann <morpheus.ibis@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <errno.h>
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#include <malloc.h>
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#include <libfdt.h>
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#include <dm/device.h>
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#include <dm/device-internal.h>
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#include <dm/lists.h>
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#include <dm/platdata.h>
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#include <dm/root.h>
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#include <dm/uclass.h>
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#include <dm/util.h>
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#include <linux/list.h>
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DECLARE_GLOBAL_DATA_PTR;
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static const struct driver_info root_info = {
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.name = "root_driver",
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};
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struct udevice *dm_root(void)
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{
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if (!gd->dm_root) {
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dm_warn("Virtual root driver does not exist!\n");
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return NULL;
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}
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return gd->dm_root;
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}
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int dm_init(void)
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{
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int ret;
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if (gd->dm_root) {
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dm_warn("Virtual root driver already exists!\n");
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return -EINVAL;
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}
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INIT_LIST_HEAD(&DM_UCLASS_ROOT_NON_CONST);
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ret = device_bind_by_name(NULL, false, &root_info, &DM_ROOT_NON_CONST);
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if (ret)
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return ret;
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ret = device_probe(DM_ROOT_NON_CONST);
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if (ret)
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return ret;
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return 0;
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}
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int dm_uninit(void)
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{
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device_remove(dm_root());
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device_unbind(dm_root());
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return 0;
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}
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int dm_scan_platdata(bool pre_reloc_only)
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{
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int ret;
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ret = lists_bind_drivers(DM_ROOT_NON_CONST, pre_reloc_only);
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if (ret == -ENOENT) {
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dm_warn("Some drivers were not found\n");
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ret = 0;
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}
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if (ret)
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return ret;
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return 0;
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}
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#ifdef CONFIG_OF_CONTROL
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int dm_scan_fdt_node(struct udevice *parent, const void *blob, int offset,
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bool pre_reloc_only)
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{
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int ret = 0, err;
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for (offset = fdt_first_subnode(blob, offset);
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offset > 0;
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offset = fdt_next_subnode(blob, offset)) {
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if (pre_reloc_only &&
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!fdt_getprop(blob, offset, "u-boot,dm-pre-reloc", NULL))
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continue;
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err = lists_bind_fdt(parent, blob, offset, NULL);
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if (err && !ret)
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ret = err;
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}
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if (ret)
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dm_warn("Some drivers failed to bind\n");
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return ret;
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}
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int dm_scan_fdt(const void *blob, bool pre_reloc_only)
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{
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return dm_scan_fdt_node(gd->dm_root, blob, 0, pre_reloc_only);
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}
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#endif
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__weak int dm_scan_other(bool pre_reloc_only)
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{
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return 0;
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}
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int dm_init_and_scan(bool pre_reloc_only)
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{
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int ret;
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ret = dm_init();
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if (ret) {
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debug("dm_init() failed: %d\n", ret);
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return ret;
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}
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ret = dm_scan_platdata(pre_reloc_only);
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if (ret) {
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debug("dm_scan_platdata() failed: %d\n", ret);
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return ret;
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}
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#ifdef CONFIG_OF_CONTROL
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ret = dm_scan_fdt(gd->fdt_blob, pre_reloc_only);
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if (ret) {
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debug("dm_scan_fdt() failed: %d\n", ret);
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return ret;
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}
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#endif
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ret = dm_scan_other(pre_reloc_only);
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if (ret)
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return ret;
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return 0;
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}
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/* This is the root driver - all drivers are children of this */
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U_BOOT_DRIVER(root_driver) = {
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.name = "root_driver",
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.id = UCLASS_ROOT,
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};
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/* This is the root uclass */
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UCLASS_DRIVER(root) = {
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.name = "root",
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.id = UCLASS_ROOT,
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};
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