*/
#include <common.h>
+#include <fdtdec.h>
#include <malloc.h>
#include <dm/device.h>
#include <dm/device-internal.h>
#include <linux/err.h>
#include <linux/list.h>
+DECLARE_GLOBAL_DATA_PTR;
+
/**
* device_chld_unbind() - Unbind all device's children from the device
*
dev->parent = parent;
dev->driver = drv;
dev->uclass = uc;
+
+ /*
+ * For some devices, such as a SPI or I2C bus, the 'reg' property
+ * is a reasonable indicator of the sequence number. But if there is
+ * an alias, we use that in preference. In any case, this is just
+ * a 'requested' sequence, and will be resolved (and ->seq updated)
+ * when the device is probed.
+ */
+ dev->seq = -1;
+#ifdef CONFIG_OF_CONTROL
+ dev->req_seq = fdtdec_get_int(gd->fdt_blob, of_offset, "reg", -1);
+ if (!IS_ERR_VALUE(dev->req_seq))
+ dev->req_seq &= INT_MAX;
+ if (uc->uc_drv->name && of_offset != -1) {
+ fdtdec_get_alias_seq(gd->fdt_blob, uc->uc_drv->name, of_offset,
+ &dev->req_seq);
+ }
+#else
+ dev->req_seq = -1;
+#endif
if (!dev->platdata && drv->platdata_auto_alloc_size)
dev->flags |= DM_FLAG_ALLOC_PDATA;
return ret;
}
-int device_bind_by_name(struct udevice *parent, const struct driver_info *info,
- struct udevice **devp)
+int device_bind_by_name(struct udevice *parent, bool pre_reloc_only,
+ const struct driver_info *info, struct udevice **devp)
{
struct driver *drv;
drv = lists_driver_lookup_name(info->name);
if (!drv)
return -ENOENT;
+ if (pre_reloc_only && !(drv->flags & DM_FLAG_PRE_RELOC))
+ return -EPERM;
return device_bind(parent, drv, info->name, (void *)info->platdata,
-1, devp);
free(dev->uclass_priv);
dev->uclass_priv = NULL;
}
+ if (dev->parent) {
+ size = dev->parent->driver->per_child_auto_alloc_size;
+ if (size) {
+ free(dev->parent_priv);
+ dev->parent_priv = NULL;
+ }
+ }
}
int device_probe(struct udevice *dev)
struct driver *drv;
int size = 0;
int ret;
+ int seq;
if (!dev)
return -EINVAL;
/* Ensure all parents are probed */
if (dev->parent) {
+ size = dev->parent->driver->per_child_auto_alloc_size;
+ if (size) {
+ dev->parent_priv = calloc(1, size);
+ if (!dev->parent_priv) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+ }
+
ret = device_probe(dev->parent);
if (ret)
goto fail;
}
+ seq = uclass_resolve_seq(dev);
+ if (seq < 0) {
+ ret = seq;
+ goto fail;
+ }
+ dev->seq = seq;
+
+ if (dev->parent && dev->parent->driver->child_pre_probe) {
+ ret = dev->parent->driver->child_pre_probe(dev);
+ if (ret)
+ goto fail;
+ }
+
if (drv->ofdata_to_platdata && dev->of_offset >= 0) {
ret = drv->ofdata_to_platdata(dev);
if (ret)
__func__, dev->name);
}
fail:
+ dev->seq = -1;
device_free(dev);
return ret;
goto err_remove;
}
+ if (dev->parent && dev->parent->driver->child_post_remove) {
+ ret = dev->parent->driver->child_post_remove(dev);
+ if (ret) {
+ dm_warn("%s: Device '%s' failed child_post_remove()",
+ __func__, dev->name);
+ }
+ }
+
device_free(dev);
+ dev->seq = -1;
dev->flags &= ~DM_FLAG_ACTIVATED;
- return 0;
+ return ret;
err_remove:
/* We can't put the children back */
return dev->priv;
}
+
+void *dev_get_parentdata(struct udevice *dev)
+{
+ if (!dev) {
+ dm_warn("%s: null device", __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;
+}
+
+int device_get_child(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_find_child_by_seq(struct udevice *parent, int seq_or_req_seq,
+ bool find_req_seq, struct udevice **devp)
+{
+ struct udevice *dev;
+
+ *devp = NULL;
+ if (seq_or_req_seq == -1)
+ return -ENODEV;
+
+ list_for_each_entry(dev, &parent->child_head, sibling_node) {
+ if ((find_req_seq ? dev->req_seq : dev->seq) ==
+ seq_or_req_seq) {
+ *devp = dev;
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+
+int device_get_child_by_seq(struct udevice *parent, int seq,
+ struct udevice **devp)
+{
+ struct udevice *dev;
+ int ret;
+
+ *devp = NULL;
+ ret = device_find_child_by_seq(parent, seq, false, &dev);
+ if (ret == -ENODEV) {
+ /*
+ * We didn't find it in probed devices. See if there is one
+ * that will request this seq if probed.
+ */
+ ret = device_find_child_by_seq(parent, seq, true, &dev);
+ }
+ return device_get_device_tail(dev, ret, devp);
+}
+
+int device_find_child_by_of_offset(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 == of_offset) {
+ *devp = dev;
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+
+int device_get_child_by_of_offset(struct udevice *parent, int seq,
+ struct udevice **devp)
+{
+ struct udevice *dev;
+ int ret;
+
+ *devp = NULL;
+ ret = device_find_child_by_of_offset(parent, seq, &dev);
+ return device_get_device_tail(dev, ret, devp);
+}
+
+int device_find_first_child(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;
+}
projects / karo-tx-uboot.git / blobdiff