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7497812d47
The root device should be probed just like any other device. The effect of this is to mark the device as activated, so that it can be removed (along with its children) if required. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Marek Vasut <marex@denx.de>
107 lines
1.8 KiB
C
107 lines
1.8 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, &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_scan_platdata(void)
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{
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int ret;
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ret = lists_bind_drivers(DM_ROOT_NON_CONST);
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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(const void *blob)
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{
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int offset = 0;
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int ret = 0, err;
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int depth = 0;
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do {
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offset = fdt_next_node(blob, offset, &depth);
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if (offset > 0 && depth == 1) {
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err = lists_bind_fdt(gd->dm_root, blob, offset);
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if (err && !ret)
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ret = err;
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}
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} while (offset > 0);
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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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#endif
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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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