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![Simon Glass](/assets/img/avatar_default.png)
At present device_bind() does some unnecessary work if a device fails to bind in SPL. Add the missing conditions. Also fix a style nit in the same function while we are here. Signed-off-by: Simon Glass <sjg@chromium.org>
1139 lines
24 KiB
C
1139 lines
24 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Device manager
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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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* Pavel Herrmann <morpheus.ibis@gmail.com>
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*/
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#include <common.h>
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#include <cpu_func.h>
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#include <log.h>
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#include <asm/global_data.h>
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#include <asm/io.h>
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#include <clk.h>
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#include <fdtdec.h>
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#include <fdt_support.h>
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#include <malloc.h>
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#include <asm/cache.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/of_access.h>
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#include <dm/pinctrl.h>
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#include <dm/platdata.h>
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#include <dm/read.h>
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#include <dm/uclass.h>
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#include <dm/uclass-internal.h>
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#include <dm/util.h>
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#include <linux/err.h>
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#include <linux/list.h>
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#include <power-domain.h>
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DECLARE_GLOBAL_DATA_PTR;
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static int device_bind_common(struct udevice *parent, const struct driver *drv,
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const char *name, void *plat,
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ulong driver_data, ofnode node,
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uint of_plat_size, struct udevice **devp)
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{
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struct udevice *dev;
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struct uclass *uc;
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int size, ret = 0;
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bool auto_seq = true;
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void *ptr;
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if (devp)
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*devp = NULL;
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if (!name)
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return -EINVAL;
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ret = uclass_get(drv->id, &uc);
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if (ret) {
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debug("Missing uclass for driver %s\n", drv->name);
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return ret;
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}
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dev = calloc(1, sizeof(struct udevice));
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if (!dev)
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return -ENOMEM;
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INIT_LIST_HEAD(&dev->sibling_node);
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INIT_LIST_HEAD(&dev->child_head);
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INIT_LIST_HEAD(&dev->uclass_node);
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#ifdef CONFIG_DEVRES
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INIT_LIST_HEAD(&dev->devres_head);
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#endif
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dev_set_plat(dev, plat);
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dev->driver_data = driver_data;
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dev->name = name;
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dev_set_ofnode(dev, node);
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dev->parent = parent;
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dev->driver = drv;
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dev->uclass = uc;
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dev->seq_ = -1;
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if (CONFIG_IS_ENABLED(DM_SEQ_ALIAS) &&
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(uc->uc_drv->flags & DM_UC_FLAG_SEQ_ALIAS)) {
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/*
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* Some devices, such as a SPI bus, I2C bus and serial ports
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* are numbered using aliases.
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*/
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if (CONFIG_IS_ENABLED(OF_CONTROL) &&
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!CONFIG_IS_ENABLED(OF_PLATDATA)) {
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if (uc->uc_drv->name && ofnode_valid(node)) {
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if (!dev_read_alias_seq(dev, &dev->seq_))
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auto_seq = false;
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}
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}
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}
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if (auto_seq && !(uc->uc_drv->flags & DM_UC_FLAG_NO_AUTO_SEQ))
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dev->seq_ = uclass_find_next_free_seq(uc);
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/* Check if we need to allocate plat */
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if (drv->plat_auto) {
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bool alloc = !plat;
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/*
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* For of-platdata, we try use the existing data, but if
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* plat_auto is larger, we must allocate a new space
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*/
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if (CONFIG_IS_ENABLED(OF_PLATDATA)) {
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if (of_plat_size)
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dev_or_flags(dev, DM_FLAG_OF_PLATDATA);
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if (of_plat_size < drv->plat_auto)
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alloc = true;
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}
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if (alloc) {
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dev_or_flags(dev, DM_FLAG_ALLOC_PDATA);
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ptr = calloc(1, drv->plat_auto);
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if (!ptr) {
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ret = -ENOMEM;
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goto fail_alloc1;
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}
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/*
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* For of-platdata, copy the old plat into the new
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* space
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*/
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if (CONFIG_IS_ENABLED(OF_PLATDATA) && plat)
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memcpy(ptr, plat, of_plat_size);
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dev_set_plat(dev, ptr);
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}
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}
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size = uc->uc_drv->per_device_plat_auto;
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if (size) {
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dev_or_flags(dev, DM_FLAG_ALLOC_UCLASS_PDATA);
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ptr = calloc(1, size);
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if (!ptr) {
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ret = -ENOMEM;
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goto fail_alloc2;
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}
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dev_set_uclass_plat(dev, ptr);
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}
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if (parent) {
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size = parent->driver->per_child_plat_auto;
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if (!size)
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size = parent->uclass->uc_drv->per_child_plat_auto;
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if (size) {
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dev_or_flags(dev, DM_FLAG_ALLOC_PARENT_PDATA);
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ptr = calloc(1, size);
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if (!ptr) {
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ret = -ENOMEM;
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goto fail_alloc3;
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}
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dev_set_parent_plat(dev, ptr);
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}
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/* put dev into parent's successor list */
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list_add_tail(&dev->sibling_node, &parent->child_head);
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}
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ret = uclass_bind_device(dev);
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if (ret)
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goto fail_uclass_bind;
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/* if we fail to bind we remove device from successors and free it */
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if (drv->bind) {
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ret = drv->bind(dev);
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if (ret)
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goto fail_bind;
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}
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if (parent && parent->driver->child_post_bind) {
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ret = parent->driver->child_post_bind(dev);
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if (ret)
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goto fail_child_post_bind;
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}
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if (uc->uc_drv->post_bind) {
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ret = uc->uc_drv->post_bind(dev);
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if (ret)
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goto fail_uclass_post_bind;
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}
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if (parent)
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pr_debug("Bound device %s to %s\n", dev->name, parent->name);
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if (devp)
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*devp = dev;
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dev_or_flags(dev, DM_FLAG_BOUND);
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return 0;
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fail_uclass_post_bind:
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/* There is no child unbind() method, so no clean-up required */
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fail_child_post_bind:
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if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) {
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if (drv->unbind && drv->unbind(dev)) {
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dm_warn("unbind() method failed on dev '%s' on error path\n",
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dev->name);
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}
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}
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fail_bind:
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if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) {
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if (uclass_unbind_device(dev)) {
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dm_warn("Failed to unbind dev '%s' on error path\n",
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dev->name);
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}
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}
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fail_uclass_bind:
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if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) {
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list_del(&dev->sibling_node);
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if (dev_get_flags(dev) & DM_FLAG_ALLOC_PARENT_PDATA) {
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free(dev_get_parent_plat(dev));
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dev_set_parent_plat(dev, NULL);
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}
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}
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fail_alloc3:
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if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) {
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if (dev_get_flags(dev) & DM_FLAG_ALLOC_UCLASS_PDATA) {
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free(dev_get_uclass_plat(dev));
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dev_set_uclass_plat(dev, NULL);
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}
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}
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fail_alloc2:
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if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) {
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if (dev_get_flags(dev) & DM_FLAG_ALLOC_PDATA) {
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free(dev_get_plat(dev));
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dev_set_plat(dev, NULL);
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}
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}
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fail_alloc1:
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devres_release_all(dev);
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free(dev);
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return ret;
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}
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int device_bind_with_driver_data(struct udevice *parent,
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const struct driver *drv, const char *name,
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ulong driver_data, ofnode node,
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struct udevice **devp)
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{
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return device_bind_common(parent, drv, name, NULL, driver_data, node,
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0, devp);
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}
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int device_bind(struct udevice *parent, const struct driver *drv,
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const char *name, void *plat, ofnode node,
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struct udevice **devp)
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{
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return device_bind_common(parent, drv, name, plat, 0, node, 0,
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devp);
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}
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int device_bind_by_name(struct udevice *parent, bool pre_reloc_only,
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const struct driver_info *info, struct udevice **devp)
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{
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struct driver *drv;
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uint plat_size = 0;
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int ret;
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drv = lists_driver_lookup_name(info->name);
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if (!drv)
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return -ENOENT;
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if (pre_reloc_only && !(drv->flags & DM_FLAG_PRE_RELOC))
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return -EPERM;
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#if CONFIG_IS_ENABLED(OF_PLATDATA)
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plat_size = info->plat_size;
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#endif
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ret = device_bind_common(parent, drv, info->name, (void *)info->plat, 0,
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ofnode_null(), plat_size, devp);
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if (ret)
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return ret;
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return ret;
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}
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int device_reparent(struct udevice *dev, struct udevice *new_parent)
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{
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struct udevice *pos, *n;
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assert(dev);
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assert(new_parent);
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list_for_each_entry_safe(pos, n, &dev->parent->child_head,
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sibling_node) {
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if (pos->driver != dev->driver)
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continue;
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list_del(&dev->sibling_node);
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list_add_tail(&dev->sibling_node, &new_parent->child_head);
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dev->parent = new_parent;
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break;
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}
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return 0;
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}
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static void *alloc_priv(int size, uint flags)
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{
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void *priv;
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if (flags & DM_FLAG_ALLOC_PRIV_DMA) {
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size = ROUND(size, ARCH_DMA_MINALIGN);
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priv = memalign(ARCH_DMA_MINALIGN, size);
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if (priv) {
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memset(priv, '\0', size);
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/*
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* Ensure that the zero bytes are flushed to memory.
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* This prevents problems if the driver uses this as
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* both an input and an output buffer:
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*
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* 1. Zeroes written to buffer (here) and sit in the
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* cache
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* 2. Driver issues a read command to DMA
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* 3. CPU runs out of cache space and evicts some cache
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* data in the buffer, writing zeroes to RAM from
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* the memset() above
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* 4. DMA completes
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* 5. Buffer now has some DMA data and some zeroes
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* 6. Data being read is now incorrect
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*
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* To prevent this, ensure that the cache is clean
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* within this range at the start. The driver can then
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* use normal flush-after-write, invalidate-before-read
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* procedures.
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*
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* TODO(sjg@chromium.org): Drop this microblaze
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* exception.
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*/
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#ifndef CONFIG_MICROBLAZE
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flush_dcache_range((ulong)priv, (ulong)priv + size);
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#endif
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}
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} else {
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priv = calloc(1, size);
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}
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return priv;
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}
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/**
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* device_alloc_priv() - Allocate priv/plat data required by the device
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*
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* @dev: Device to process
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* @return 0 if OK, -ENOMEM if out of memory
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*/
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static int device_alloc_priv(struct udevice *dev)
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{
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const struct driver *drv;
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void *ptr;
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int size;
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drv = dev->driver;
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assert(drv);
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/* Allocate private data if requested and not reentered */
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if (drv->priv_auto && !dev_get_priv(dev)) {
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ptr = alloc_priv(drv->priv_auto, drv->flags);
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if (!ptr)
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return -ENOMEM;
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dev_set_priv(dev, ptr);
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}
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/* Allocate private data if requested and not reentered */
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size = dev->uclass->uc_drv->per_device_auto;
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if (size && !dev_get_uclass_priv(dev)) {
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ptr = alloc_priv(size, dev->uclass->uc_drv->flags);
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if (!ptr)
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return -ENOMEM;
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dev_set_uclass_priv(dev, ptr);
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}
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/* Allocate parent data for this child */
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if (dev->parent) {
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size = dev->parent->driver->per_child_auto;
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if (!size)
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size = dev->parent->uclass->uc_drv->per_child_auto;
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if (size && !dev_get_parent_priv(dev)) {
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ptr = alloc_priv(size, drv->flags);
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if (!ptr)
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return -ENOMEM;
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dev_set_parent_priv(dev, ptr);
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}
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}
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return 0;
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}
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int device_of_to_plat(struct udevice *dev)
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{
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const struct driver *drv;
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int ret;
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if (!dev)
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return -EINVAL;
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if (dev_get_flags(dev) & DM_FLAG_PLATDATA_VALID)
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return 0;
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/* Ensure all parents have ofdata */
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if (dev->parent) {
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ret = device_of_to_plat(dev->parent);
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if (ret)
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goto fail;
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/*
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* The device might have already been probed during
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* the call to device_probe() on its parent device
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* (e.g. PCI bridge devices). Test the flags again
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* so that we don't mess up the device.
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*/
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if (dev_get_flags(dev) & DM_FLAG_PLATDATA_VALID)
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return 0;
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}
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ret = device_alloc_priv(dev);
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if (ret)
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goto fail;
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drv = dev->driver;
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assert(drv);
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if (drv->of_to_plat &&
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(CONFIG_IS_ENABLED(OF_PLATDATA) || dev_has_ofnode(dev))) {
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ret = drv->of_to_plat(dev);
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if (ret)
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goto fail;
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}
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dev_or_flags(dev, DM_FLAG_PLATDATA_VALID);
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return 0;
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fail:
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device_free(dev);
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return ret;
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}
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/**
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* device_get_dma_constraints() - Populate device's DMA constraints
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*
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* Gets a device's DMA constraints from firmware. This information is later
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* used by drivers to translate physcal addresses to the device's bus address
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* space. For now only device-tree is supported.
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*
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* @dev: Pointer to target device
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* Return: 0 if OK or if no DMA constraints were found, error otherwise
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*/
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static int device_get_dma_constraints(struct udevice *dev)
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{
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struct udevice *parent = dev->parent;
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phys_addr_t cpu = 0;
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dma_addr_t bus = 0;
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u64 size = 0;
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int ret;
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if (!CONFIG_IS_ENABLED(DM_DMA) || !parent || !dev_has_ofnode(parent))
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return 0;
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/*
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* We start parsing for dma-ranges from the device's bus node. This is
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* specially important on nested buses.
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*/
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ret = dev_get_dma_range(parent, &cpu, &bus, &size);
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/* Don't return an error if no 'dma-ranges' were found */
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if (ret && ret != -ENOENT) {
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dm_warn("%s: failed to get DMA range, %d\n", dev->name, ret);
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return ret;
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}
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dev_set_dma_offset(dev, cpu - bus);
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return 0;
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}
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int device_probe(struct udevice *dev)
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{
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const struct driver *drv;
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int ret;
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|
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if (!dev)
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return -EINVAL;
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if (dev_get_flags(dev) & DM_FLAG_ACTIVATED)
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return 0;
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drv = dev->driver;
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assert(drv);
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ret = device_of_to_plat(dev);
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if (ret)
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goto fail;
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|
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/* Ensure all parents are probed */
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if (dev->parent) {
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ret = device_probe(dev->parent);
|
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if (ret)
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goto fail;
|
|
|
|
/*
|
|
* The device might have already been probed during
|
|
* the call to device_probe() on its parent device
|
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* (e.g. PCI bridge devices). Test the flags again
|
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* so that we don't mess up the device.
|
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*/
|
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if (dev_get_flags(dev) & DM_FLAG_ACTIVATED)
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return 0;
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}
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dev_or_flags(dev, DM_FLAG_ACTIVATED);
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|
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/*
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* Process pinctrl for everything except the root device, and
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* continue regardless of the result of pinctrl. Don't process pinctrl
|
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* settings for pinctrl devices since the device may not yet be
|
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* probed.
|
|
*
|
|
* This call can produce some non-intuitive results. For example, on an
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* x86 device where dev is the main PCI bus, the pinctrl device may be
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* child or grandchild of that bus, meaning that the child will be
|
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* probed here. If the child happens to be the P2SB and the pinctrl
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* device is a child of that, then both the pinctrl and P2SB will be
|
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* probed by this call. This works because the DM_FLAG_ACTIVATED flag
|
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* is set just above. However, the PCI bus' probe() method and
|
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* associated uclass methods have not yet been called.
|
|
*/
|
|
if (dev->parent && device_get_uclass_id(dev) != UCLASS_PINCTRL)
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|
pinctrl_select_state(dev, "default");
|
|
|
|
if (CONFIG_IS_ENABLED(POWER_DOMAIN) && dev->parent &&
|
|
(device_get_uclass_id(dev) != UCLASS_POWER_DOMAIN) &&
|
|
!(drv->flags & DM_FLAG_DEFAULT_PD_CTRL_OFF)) {
|
|
ret = dev_power_domain_on(dev);
|
|
if (ret)
|
|
goto fail;
|
|
}
|
|
|
|
ret = device_get_dma_constraints(dev);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
ret = uclass_pre_probe_device(dev);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
if (dev->parent && dev->parent->driver->child_pre_probe) {
|
|
ret = dev->parent->driver->child_pre_probe(dev);
|
|
if (ret)
|
|
goto fail;
|
|
}
|
|
|
|
/* Only handle devices that have a valid ofnode */
|
|
if (dev_has_ofnode(dev)) {
|
|
/*
|
|
* Process 'assigned-{clocks/clock-parents/clock-rates}'
|
|
* properties
|
|
*/
|
|
ret = clk_set_defaults(dev, 0);
|
|
if (ret)
|
|
goto fail;
|
|
}
|
|
|
|
if (drv->probe) {
|
|
ret = drv->probe(dev);
|
|
if (ret)
|
|
goto fail;
|
|
}
|
|
|
|
ret = uclass_post_probe_device(dev);
|
|
if (ret)
|
|
goto fail_uclass;
|
|
|
|
if (dev->parent && device_get_uclass_id(dev) == UCLASS_PINCTRL)
|
|
pinctrl_select_state(dev, "default");
|
|
|
|
return 0;
|
|
fail_uclass:
|
|
if (device_remove(dev, DM_REMOVE_NORMAL)) {
|
|
dm_warn("%s: Device '%s' failed to remove on error path\n",
|
|
__func__, dev->name);
|
|
}
|
|
fail:
|
|
dev_bic_flags(dev, DM_FLAG_ACTIVATED);
|
|
|
|
device_free(dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void *dev_get_plat(const struct udevice *dev)
|
|
{
|
|
if (!dev) {
|
|
dm_warn("%s: null device\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
return dev->plat_;
|
|
}
|
|
|
|
void *dev_get_parent_plat(const struct udevice *dev)
|
|
{
|
|
if (!dev) {
|
|
dm_warn("%s: null device\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
return dev->parent_plat_;
|
|
}
|
|
|
|
void *dev_get_uclass_plat(const struct udevice *dev)
|
|
{
|
|
if (!dev) {
|
|
dm_warn("%s: null device\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
return dev->uclass_plat_;
|
|
}
|
|
|
|
void *dev_get_priv(const struct udevice *dev)
|
|
{
|
|
if (!dev) {
|
|
dm_warn("%s: null device\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
return dev->priv_;
|
|
}
|
|
|
|
void *dev_get_uclass_priv(const struct udevice *dev)
|
|
{
|
|
if (!dev) {
|
|
dm_warn("%s: null device\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
return dev->uclass_priv_;
|
|
}
|
|
|
|
void *dev_get_parent_priv(const struct udevice *dev)
|
|
{
|
|
if (!dev) {
|
|
dm_warn("%s: null device\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
return dev->parent_priv_;
|
|
}
|
|
|
|
static int device_get_device_tail(struct udevice *dev, int ret,
|
|
struct udevice **devp)
|
|
{
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = device_probe(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
*devp = dev;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
|
|
/**
|
|
* device_find_by_ofnode() - Return device associated with given ofnode
|
|
*
|
|
* The returned device is *not* activated.
|
|
*
|
|
* @node: The ofnode for which a associated device should be looked up
|
|
* @devp: Pointer to structure to hold the found device
|
|
* Return: 0 if OK, -ve on error
|
|
*/
|
|
static int device_find_by_ofnode(ofnode node, struct udevice **devp)
|
|
{
|
|
struct uclass *uc;
|
|
struct udevice *dev;
|
|
int ret;
|
|
|
|
list_for_each_entry(uc, gd->uclass_root, sibling_node) {
|
|
ret = uclass_find_device_by_ofnode(uc->uc_drv->id, node,
|
|
&dev);
|
|
if (!ret || dev) {
|
|
*devp = dev;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
#endif
|
|
|
|
int device_get_child(const struct udevice *parent, int index,
|
|
struct udevice **devp)
|
|
{
|
|
struct udevice *dev;
|
|
|
|
list_for_each_entry(dev, &parent->child_head, sibling_node) {
|
|
if (!index--)
|
|
return device_get_device_tail(dev, 0, devp);
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
int device_get_child_count(const struct udevice *parent)
|
|
{
|
|
struct udevice *dev;
|
|
int count = 0;
|
|
|
|
list_for_each_entry(dev, &parent->child_head, sibling_node)
|
|
count++;
|
|
|
|
return count;
|
|
}
|
|
|
|
int device_find_child_by_seq(const struct udevice *parent, int seq,
|
|
struct udevice **devp)
|
|
{
|
|
struct udevice *dev;
|
|
|
|
*devp = NULL;
|
|
|
|
list_for_each_entry(dev, &parent->child_head, sibling_node) {
|
|
if (dev->seq_ == seq) {
|
|
*devp = dev;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
int device_get_child_by_seq(const struct udevice *parent, int seq,
|
|
struct udevice **devp)
|
|
{
|
|
struct udevice *dev;
|
|
int ret;
|
|
|
|
*devp = NULL;
|
|
ret = device_find_child_by_seq(parent, seq, &dev);
|
|
|
|
return device_get_device_tail(dev, ret, devp);
|
|
}
|
|
|
|
int device_find_child_by_of_offset(const struct udevice *parent, int of_offset,
|
|
struct udevice **devp)
|
|
{
|
|
struct udevice *dev;
|
|
|
|
*devp = NULL;
|
|
|
|
list_for_each_entry(dev, &parent->child_head, sibling_node) {
|
|
if (dev_of_offset(dev) == of_offset) {
|
|
*devp = dev;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
int device_get_child_by_of_offset(const struct udevice *parent, int node,
|
|
struct udevice **devp)
|
|
{
|
|
struct udevice *dev;
|
|
int ret;
|
|
|
|
*devp = NULL;
|
|
ret = device_find_child_by_of_offset(parent, node, &dev);
|
|
return device_get_device_tail(dev, ret, devp);
|
|
}
|
|
|
|
static struct udevice *_device_find_global_by_ofnode(struct udevice *parent,
|
|
ofnode ofnode)
|
|
{
|
|
struct udevice *dev, *found;
|
|
|
|
if (ofnode_equal(dev_ofnode(parent), ofnode))
|
|
return parent;
|
|
|
|
list_for_each_entry(dev, &parent->child_head, sibling_node) {
|
|
found = _device_find_global_by_ofnode(dev, ofnode);
|
|
if (found)
|
|
return found;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int device_find_global_by_ofnode(ofnode ofnode, struct udevice **devp)
|
|
{
|
|
*devp = _device_find_global_by_ofnode(gd->dm_root, ofnode);
|
|
|
|
return *devp ? 0 : -ENOENT;
|
|
}
|
|
|
|
int device_get_global_by_ofnode(ofnode ofnode, struct udevice **devp)
|
|
{
|
|
struct udevice *dev;
|
|
|
|
dev = _device_find_global_by_ofnode(gd->dm_root, ofnode);
|
|
return device_get_device_tail(dev, dev ? 0 : -ENOENT, devp);
|
|
}
|
|
|
|
#if CONFIG_IS_ENABLED(OF_PLATDATA)
|
|
int device_get_by_driver_info(const struct driver_info *info,
|
|
struct udevice **devp)
|
|
{
|
|
struct driver_info *info_base =
|
|
ll_entry_start(struct driver_info, driver_info);
|
|
int idx = info - info_base;
|
|
struct driver_rt *drt = gd_dm_driver_rt() + idx;
|
|
struct udevice *dev;
|
|
|
|
dev = drt->dev;
|
|
*devp = NULL;
|
|
|
|
return device_get_device_tail(dev, dev ? 0 : -ENOENT, devp);
|
|
}
|
|
|
|
int device_get_by_driver_info_idx(uint idx, struct udevice **devp)
|
|
{
|
|
struct driver_rt *drt = gd_dm_driver_rt() + idx;
|
|
struct udevice *dev;
|
|
|
|
dev = drt->dev;
|
|
*devp = NULL;
|
|
|
|
return device_get_device_tail(dev, dev ? 0 : -ENOENT, devp);
|
|
}
|
|
#endif
|
|
|
|
int device_find_first_child(const struct udevice *parent, struct udevice **devp)
|
|
{
|
|
if (list_empty(&parent->child_head)) {
|
|
*devp = NULL;
|
|
} else {
|
|
*devp = list_first_entry(&parent->child_head, struct udevice,
|
|
sibling_node);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int device_find_next_child(struct udevice **devp)
|
|
{
|
|
struct udevice *dev = *devp;
|
|
struct udevice *parent = dev->parent;
|
|
|
|
if (list_is_last(&dev->sibling_node, &parent->child_head)) {
|
|
*devp = NULL;
|
|
} else {
|
|
*devp = list_entry(dev->sibling_node.next, struct udevice,
|
|
sibling_node);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int device_find_first_inactive_child(const struct udevice *parent,
|
|
enum uclass_id uclass_id,
|
|
struct udevice **devp)
|
|
{
|
|
struct udevice *dev;
|
|
|
|
*devp = NULL;
|
|
list_for_each_entry(dev, &parent->child_head, sibling_node) {
|
|
if (!device_active(dev) &&
|
|
device_get_uclass_id(dev) == uclass_id) {
|
|
*devp = dev;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
int device_find_first_child_by_uclass(const struct udevice *parent,
|
|
enum uclass_id uclass_id,
|
|
struct udevice **devp)
|
|
{
|
|
struct udevice *dev;
|
|
|
|
*devp = NULL;
|
|
list_for_each_entry(dev, &parent->child_head, sibling_node) {
|
|
if (device_get_uclass_id(dev) == uclass_id) {
|
|
*devp = dev;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
int device_find_child_by_name(const struct udevice *parent, const char *name,
|
|
struct udevice **devp)
|
|
{
|
|
struct udevice *dev;
|
|
|
|
*devp = NULL;
|
|
|
|
list_for_each_entry(dev, &parent->child_head, sibling_node) {
|
|
if (!strcmp(dev->name, name)) {
|
|
*devp = dev;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
int device_first_child_err(struct udevice *parent, struct udevice **devp)
|
|
{
|
|
struct udevice *dev;
|
|
|
|
device_find_first_child(parent, &dev);
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
return device_get_device_tail(dev, 0, devp);
|
|
}
|
|
|
|
int device_next_child_err(struct udevice **devp)
|
|
{
|
|
struct udevice *dev = *devp;
|
|
|
|
device_find_next_child(&dev);
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
return device_get_device_tail(dev, 0, devp);
|
|
}
|
|
|
|
int device_first_child_ofdata_err(struct udevice *parent, struct udevice **devp)
|
|
{
|
|
struct udevice *dev;
|
|
int ret;
|
|
|
|
device_find_first_child(parent, &dev);
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
ret = device_of_to_plat(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
*devp = dev;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int device_next_child_ofdata_err(struct udevice **devp)
|
|
{
|
|
struct udevice *dev = *devp;
|
|
int ret;
|
|
|
|
device_find_next_child(&dev);
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
ret = device_of_to_plat(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
*devp = dev;
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct udevice *dev_get_parent(const struct udevice *child)
|
|
{
|
|
return child->parent;
|
|
}
|
|
|
|
ulong dev_get_driver_data(const struct udevice *dev)
|
|
{
|
|
return dev->driver_data;
|
|
}
|
|
|
|
const void *dev_get_driver_ops(const struct udevice *dev)
|
|
{
|
|
if (!dev || !dev->driver->ops)
|
|
return NULL;
|
|
|
|
return dev->driver->ops;
|
|
}
|
|
|
|
enum uclass_id device_get_uclass_id(const struct udevice *dev)
|
|
{
|
|
return dev->uclass->uc_drv->id;
|
|
}
|
|
|
|
const char *dev_get_uclass_name(const struct udevice *dev)
|
|
{
|
|
if (!dev)
|
|
return NULL;
|
|
|
|
return dev->uclass->uc_drv->name;
|
|
}
|
|
|
|
bool device_has_children(const struct udevice *dev)
|
|
{
|
|
return !list_empty(&dev->child_head);
|
|
}
|
|
|
|
bool device_has_active_children(const struct udevice *dev)
|
|
{
|
|
struct udevice *child;
|
|
|
|
for (device_find_first_child(dev, &child);
|
|
child;
|
|
device_find_next_child(&child)) {
|
|
if (device_active(child))
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool device_is_last_sibling(const struct udevice *dev)
|
|
{
|
|
struct udevice *parent = dev->parent;
|
|
|
|
if (!parent)
|
|
return false;
|
|
return list_is_last(&dev->sibling_node, &parent->child_head);
|
|
}
|
|
|
|
void device_set_name_alloced(struct udevice *dev)
|
|
{
|
|
dev_or_flags(dev, DM_FLAG_NAME_ALLOCED);
|
|
}
|
|
|
|
int device_set_name(struct udevice *dev, const char *name)
|
|
{
|
|
name = strdup(name);
|
|
if (!name)
|
|
return -ENOMEM;
|
|
dev->name = name;
|
|
device_set_name_alloced(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void dev_set_priv(struct udevice *dev, void *priv)
|
|
{
|
|
dev->priv_ = priv;
|
|
}
|
|
|
|
void dev_set_parent_priv(struct udevice *dev, void *parent_priv)
|
|
{
|
|
dev->parent_priv_ = parent_priv;
|
|
}
|
|
|
|
void dev_set_uclass_priv(struct udevice *dev, void *uclass_priv)
|
|
{
|
|
dev->uclass_priv_ = uclass_priv;
|
|
}
|
|
|
|
void dev_set_plat(struct udevice *dev, void *plat)
|
|
{
|
|
dev->plat_ = plat;
|
|
}
|
|
|
|
void dev_set_parent_plat(struct udevice *dev, void *parent_plat)
|
|
{
|
|
dev->parent_plat_ = parent_plat;
|
|
}
|
|
|
|
void dev_set_uclass_plat(struct udevice *dev, void *uclass_plat)
|
|
{
|
|
dev->uclass_plat_ = uclass_plat;
|
|
}
|
|
|
|
#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
|
|
bool device_is_compatible(const struct udevice *dev, const char *compat)
|
|
{
|
|
return ofnode_device_is_compatible(dev_ofnode(dev), compat);
|
|
}
|
|
|
|
bool of_machine_is_compatible(const char *compat)
|
|
{
|
|
const void *fdt = gd->fdt_blob;
|
|
|
|
return !fdt_node_check_compatible(fdt, 0, compat);
|
|
}
|
|
|
|
int dev_disable_by_path(const char *path)
|
|
{
|
|
struct uclass *uc;
|
|
ofnode node = ofnode_path(path);
|
|
struct udevice *dev;
|
|
int ret = 1;
|
|
|
|
if (!of_live_active())
|
|
return -ENOSYS;
|
|
|
|
list_for_each_entry(uc, gd->uclass_root, sibling_node) {
|
|
ret = uclass_find_device_by_ofnode(uc->uc_drv->id, node, &dev);
|
|
if (!ret)
|
|
break;
|
|
}
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = device_remove(dev, DM_REMOVE_NORMAL);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = device_unbind(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return ofnode_set_enabled(node, false);
|
|
}
|
|
|
|
int dev_enable_by_path(const char *path)
|
|
{
|
|
ofnode node = ofnode_path(path);
|
|
ofnode pnode = ofnode_get_parent(node);
|
|
struct udevice *parent;
|
|
int ret = 1;
|
|
|
|
if (!of_live_active())
|
|
return -ENOSYS;
|
|
|
|
ret = device_find_by_ofnode(pnode, &parent);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = ofnode_set_enabled(node, true);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return lists_bind_fdt(parent, node, NULL, false);
|
|
}
|
|
#endif
|