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author | Tom Rini <trini@konsulko.com> | 2018-09-30 18:16:51 -0400 |
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committer | Tom Rini <trini@konsulko.com> | 2018-09-30 18:16:51 -0400 |
commit | d24c1d0f4da3b081a4fedf7ae2a08790871f08d0 (patch) | |
tree | 30051c24000bbb640b6296c8a71a8e05f0cc06e4 /drivers/core | |
parent | 2c1e16b9d2e3a6138acf4ffd9866e47ddbe6d453 (diff) | |
parent | 31b8217e83a63d1c8c70edcdcdf5aff3b1791640 (diff) | |
download | u-boot-d24c1d0f4da3b081a4fedf7ae2a08790871f08d0.tar.gz |
Merge git://git.denx.de/u-boot-dm
Diffstat (limited to 'drivers/core')
-rw-r--r-- | drivers/core/device.c | 78 | ||||
-rw-r--r-- | drivers/core/ofnode.c | 70 |
2 files changed, 148 insertions, 0 deletions
diff --git a/drivers/core/device.c b/drivers/core/device.c index fd59fe1e0f..feed43c8c3 100644 --- a/drivers/core/device.c +++ b/drivers/core/device.c @@ -516,6 +516,33 @@ static int device_get_device_tail(struct udevice *dev, int ret, return 0; } +/** + * 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; +} + int device_get_child(struct udevice *parent, int index, struct udevice **devp) { struct udevice *dev; @@ -739,3 +766,54 @@ bool of_machine_is_compatible(const char *compat) 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); +} diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c index a7e1927723..1e354803b0 100644 --- a/drivers/core/ofnode.c +++ b/drivers/core/ofnode.c @@ -791,3 +791,73 @@ ofnode ofnode_by_prop_value(ofnode from, const char *propname, propname, propval, proplen)); } } + +int ofnode_write_prop(ofnode node, const char *propname, int len, + const void *value) +{ + const struct device_node *np = ofnode_to_np(node); + struct property *pp; + struct property *pp_last = NULL; + struct property *new; + + if (!of_live_active()) + return -ENOSYS; + + if (!np) + return -EINVAL; + + for (pp = np->properties; pp; pp = pp->next) { + if (strcmp(pp->name, propname) == 0) { + /* Property exists -> change value */ + pp->value = (void *)value; + pp->length = len; + return 0; + } + pp_last = pp; + } + + if (!pp_last) + return -ENOENT; + + /* Property does not exist -> append new property */ + new = malloc(sizeof(struct property)); + if (!new) + return -ENOMEM; + + new->name = strdup(propname); + if (!new->name) + return -ENOMEM; + + new->value = (void *)value; + new->length = len; + new->next = NULL; + + pp_last->next = new; + + return 0; +} + +int ofnode_write_string(ofnode node, const char *propname, const char *value) +{ + if (!of_live_active()) + return -ENOSYS; + + assert(ofnode_valid(node)); + + debug("%s: %s = %s", __func__, propname, value); + + return ofnode_write_prop(node, propname, strlen(value) + 1, value); +} + +int ofnode_set_enabled(ofnode node, bool value) +{ + if (!of_live_active()) + return -ENOSYS; + + assert(ofnode_valid(node)); + + if (value) + return ofnode_write_string(node, "status", "okay"); + else + return ofnode_write_string(node, "status", "disable"); +} |