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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
199 lines
4.8 KiB
C
199 lines
4.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2013 Google, Inc
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*
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* (C) Copyright 2012
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* Marek Vasut <marex@denx.de>
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*/
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#include <common.h>
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#include <errno.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/uclass.h>
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#include <dm/util.h>
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#include <fdtdec.h>
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#include <linux/compiler.h>
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struct driver *lists_driver_lookup_name(const char *name)
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{
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struct driver *drv =
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ll_entry_start(struct driver, driver);
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const int n_ents = ll_entry_count(struct driver, driver);
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struct driver *entry;
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for (entry = drv; entry != drv + n_ents; entry++) {
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if (!strcmp(name, entry->name))
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return entry;
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}
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/* Not found */
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return NULL;
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}
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struct uclass_driver *lists_uclass_lookup(enum uclass_id id)
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{
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struct uclass_driver *uclass =
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ll_entry_start(struct uclass_driver, uclass);
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const int n_ents = ll_entry_count(struct uclass_driver, uclass);
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struct uclass_driver *entry;
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for (entry = uclass; entry != uclass + n_ents; entry++) {
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if (entry->id == id)
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return entry;
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}
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return NULL;
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}
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int lists_bind_drivers(struct udevice *parent, bool pre_reloc_only)
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{
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struct driver_info *info =
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ll_entry_start(struct driver_info, driver_info);
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const int n_ents = ll_entry_count(struct driver_info, driver_info);
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struct driver_info *entry;
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struct udevice *dev;
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int result = 0;
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int ret;
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for (entry = info; entry != info + n_ents; entry++) {
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ret = device_bind_by_name(parent, pre_reloc_only, entry, &dev);
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if (ret && ret != -EPERM) {
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dm_warn("No match for driver '%s'\n", entry->name);
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if (!result || ret != -ENOENT)
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result = ret;
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}
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}
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return result;
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}
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int device_bind_driver(struct udevice *parent, const char *drv_name,
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const char *dev_name, struct udevice **devp)
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{
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return device_bind_driver_to_node(parent, drv_name, dev_name,
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ofnode_null(), devp);
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}
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int device_bind_driver_to_node(struct udevice *parent, const char *drv_name,
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const char *dev_name, ofnode node,
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struct udevice **devp)
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{
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struct driver *drv;
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int ret;
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drv = lists_driver_lookup_name(drv_name);
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if (!drv) {
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debug("Cannot find driver '%s'\n", drv_name);
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return -ENOENT;
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}
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ret = device_bind_with_driver_data(parent, drv, dev_name, 0 /* data */,
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node, devp);
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return ret;
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}
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#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
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/**
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* driver_check_compatible() - Check if a driver matches a compatible string
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*
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* @param of_match: List of compatible strings to match
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* @param of_idp: Returns the match that was found
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* @param compat: The compatible string to search for
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* @return 0 if there is a match, -ENOENT if no match
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*/
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static int driver_check_compatible(const struct udevice_id *of_match,
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const struct udevice_id **of_idp,
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const char *compat)
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{
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if (!of_match)
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return -ENOENT;
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while (of_match->compatible) {
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if (!strcmp(of_match->compatible, compat)) {
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*of_idp = of_match;
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return 0;
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}
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of_match++;
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}
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return -ENOENT;
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}
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int lists_bind_fdt(struct udevice *parent, ofnode node, struct udevice **devp)
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{
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struct driver *driver = ll_entry_start(struct driver, driver);
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const int n_ents = ll_entry_count(struct driver, driver);
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const struct udevice_id *id;
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struct driver *entry;
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struct udevice *dev;
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bool found = false;
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const char *name, *compat_list, *compat;
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int compat_length, i;
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int result = 0;
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int ret = 0;
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if (devp)
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*devp = NULL;
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name = ofnode_get_name(node);
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pr_debug("bind node %s\n", name);
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compat_list = ofnode_get_property(node, "compatible", &compat_length);
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if (!compat_list) {
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if (compat_length == -FDT_ERR_NOTFOUND) {
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pr_debug("Device '%s' has no compatible string\n",
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name);
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return 0;
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}
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dm_warn("Device tree error at node '%s'\n", name);
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return compat_length;
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}
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/*
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* Walk through the compatible string list, attempting to match each
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* compatible string in order such that we match in order of priority
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* from the first string to the last.
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*/
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for (i = 0; i < compat_length; i += strlen(compat) + 1) {
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compat = compat_list + i;
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pr_debug(" - attempt to match compatible string '%s'\n",
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compat);
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for (entry = driver; entry != driver + n_ents; entry++) {
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ret = driver_check_compatible(entry->of_match, &id,
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compat);
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if (!ret)
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break;
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}
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if (entry == driver + n_ents)
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continue;
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pr_debug(" - found match at '%s'\n", entry->name);
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ret = device_bind_with_driver_data(parent, entry, name,
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id->data, node, &dev);
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if (ret == -ENODEV) {
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pr_debug("Driver '%s' refuses to bind\n", entry->name);
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continue;
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}
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if (ret) {
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dm_warn("Error binding driver '%s': %d\n", entry->name,
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ret);
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return ret;
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} else {
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found = true;
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if (devp)
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*devp = dev;
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}
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break;
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}
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if (!found && !result && ret != -ENODEV)
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pr_debug("No match for node '%s'\n", name);
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return result;
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}
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#endif
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