#ifndef _DM_READ_H
#define _DM_READ_H
+#include <linux/errno.h>
+
+#include <dm/device.h>
#include <dm/fdtaddr.h>
#include <dm/ofnode.h>
#include <dm/uclass.h>
int def);
/**
+ * dev_read_u32_index() - read an indexed 32-bit integer from a device's DT
+ * property
+ *
+ * @dev: device to read DT property from
+ * @propname: name of the property to read from
+ * @index: index of the integer to return
+ * @outp: place to put value (if found)
+ * @return 0 if OK, -ve on error
+ */
+int dev_read_u32_index(struct udevice *dev, const char *propname, int index,
+ u32 *outp);
+
+/**
+ * dev_read_u32_index_default() - read an indexed 32-bit integer from a device's
+ * DT property
+ *
+ * @dev: device to read DT property from
+ * @propname: name of the property to read from
+ * @index: index of the integer to return
+ * @def: default value to return if the property has no value
+ * @return property value, or @def if not found
+ */
+u32 dev_read_u32_index_default(struct udevice *dev, const char *propname,
+ int index, u32 def);
+
+/**
* dev_read_s32() - read a signed 32-bit integer from a device's DT property
*
* @dev: device to read DT property from
int *lenp);
/**
+ * dev_read_first_prop()- get the reference of the first property
+ *
+ * Get reference to the first property of the node, it is used to iterate
+ * and read all the property with dev_read_prop_by_prop().
+ *
+ * @dev: device to check
+ * @prop: place to put argument reference
+ * @return 0 if OK, -ve on error. -FDT_ERR_NOTFOUND if not found
+ */
+int dev_read_first_prop(const struct udevice *dev, struct ofprop *prop);
+
+/**
+ * ofnode_get_next_property() - get the reference of the next property
+ *
+ * Get reference to the next property of the node, it is used to iterate
+ * and read all the property with dev_read_prop_by_prop().
+ *
+ * @prop: reference of current argument and place to put reference of next one
+ * @return 0 if OK, -ve on error. -FDT_ERR_NOTFOUND if not found
+ */
+int dev_read_next_prop(struct ofprop *prop);
+
+/**
+ * dev_read_prop_by_prop() - get a pointer to the value of a property
+ *
+ * Get value for the property identified by the provided reference.
+ *
+ * @prop: reference on property
+ * @propname: If non-NULL, place to property name on success,
+ * @lenp: If non-NULL, place to put length on success
+ * @return 0 if OK, -ve on error. -FDT_ERR_NOTFOUND if not found
+ */
+const void *dev_read_prop_by_prop(struct ofprop *prop,
+ const char **propname, int *lenp);
+
+/**
* dev_read_alias_seq() - Get the alias sequence number of a node
*
* This works out whether a node is pointed to by an alias, and if so, the
*/
int dev_read_alias_highest_id(const char *stem);
+/**
+ * dev_get_child_count() - get the child count of a device
+ *
+ * @dev: device to use for interation (struct udevice *)
+ * @return the count of child subnode
+ */
+int dev_get_child_count(const struct udevice *dev);
+
#else /* CONFIG_DM_DEV_READ_INLINE is enabled */
static inline int dev_read_u32(const struct udevice *dev,
return ofnode_read_u32_default(dev_ofnode(dev), propname, def);
}
+static inline int dev_read_u32_index(struct udevice *dev,
+ const char *propname, int index, u32 *outp)
+{
+ return ofnode_read_u32_index(dev_ofnode(dev), propname, index, outp);
+}
+
+static inline u32 dev_read_u32_index_default(struct udevice *dev,
+ const char *propname, int index,
+ u32 def)
+{
+ return ofnode_read_u32_index_default(dev_ofnode(dev), propname, index,
+ def);
+}
+
static inline int dev_read_s32(const struct udevice *dev,
const char *propname, s32 *outp)
{
static inline int dev_read_addr_cells(const struct udevice *dev)
{
- /* NOTE: this call should walk up the parent stack */
- return fdt_address_cells(gd->fdt_blob, dev_of_offset(dev));
+ int parent = fdt_parent_offset(gd->fdt_blob, dev_of_offset(dev));
+
+ return fdt_address_cells(gd->fdt_blob, parent);
}
static inline int dev_read_size_cells(const struct udevice *dev)
{
- /* NOTE: this call should walk up the parent stack */
- return fdt_size_cells(gd->fdt_blob, dev_of_offset(dev));
+ int parent = fdt_parent_offset(gd->fdt_blob, dev_of_offset(dev));
+
+ return fdt_size_cells(gd->fdt_blob, parent);
}
static inline int dev_read_simple_addr_cells(const struct udevice *dev)
return ofnode_get_property(dev_ofnode(dev), propname, lenp);
}
+static inline int dev_read_first_prop(const struct udevice *dev, struct ofprop *prop)
+{
+ return ofnode_get_first_property(dev_ofnode(dev), prop);
+}
+
+static inline int dev_read_next_prop(struct ofprop *prop)
+{
+ return ofnode_get_next_property(prop);
+}
+
+static inline const void *dev_read_prop_by_prop(struct ofprop *prop,
+ const char **propname,
+ int *lenp)
+{
+ return ofnode_get_property_by_prop(prop, propname, lenp);
+}
+
static inline int dev_read_alias_seq(const struct udevice *dev, int *devnump)
{
+#if CONFIG_IS_ENABLED(OF_CONTROL)
return fdtdec_get_alias_seq(gd->fdt_blob, dev->uclass->uc_drv->name,
dev_of_offset(dev), devnump);
+#else
+ return -ENOTSUPP;
+#endif
}
static inline int dev_read_u32_array(const struct udevice *dev,
}
static inline const uint8_t *dev_read_u8_array_ptr(const struct udevice *dev,
- const char *propname, size_t sz)
+ const char *propname,
+ size_t sz)
{
return ofnode_read_u8_array_ptr(dev_ofnode(dev), propname, sz);
}
static inline int dev_read_alias_highest_id(const char *stem)
{
+ if (!CONFIG_IS_ENABLED(OF_LIBFDT))
+ return -1;
return fdtdec_get_alias_highest_id(gd->fdt_blob, stem);
}
+static inline int dev_get_child_count(const struct udevice *dev)
+{
+ return ofnode_get_child_count(dev_ofnode(dev));
+}
+
#endif /* CONFIG_DM_DEV_READ_INLINE */
/**
ofnode_valid(subnode); \
subnode = ofnode_next_subnode(subnode))
+/**
+ * dev_for_each_property() - Helper function to iterate through property
+ *
+ * This creates a for() loop which works through the property in a device's
+ * device-tree node.
+ *
+ * @prop: struct ofprop holding the current property
+ * @dev: device to use for interation (struct udevice *)
+ */
+#define dev_for_each_property(prop, dev) \
+ for (int ret_prop = dev_read_first_prop(dev, &prop); \
+ !ret_prop; \
+ ret_prop = dev_read_next_prop(&prop))
+
#endif
projects / platform / kernel / u-boot.git / blobdiff