of_alias_from_compatible(9)

💖 NAME 💖

okay so bestie, this is of_alias_from_compatible(9) from the Kernel API Manual, and she is literally the lookup icon for finding the appropriate alias for a device node depending on compatible ✨

---

✨ SYNOPSIS ✨

int of_alias_from_compatible (const struct device_node *node , char
       *alias , int len );

---

🎀 ARGUMENTS 🎀

• node — pointer to a device tree node. That’s the node we’re checking, periodt.
• alias — pointer to the buffer that the alias value will be copied into. She’s the destination, bestie 💅
• len — length of the alias value. Gotta know how much room we’re working with 🫶

---

🦋 DESCRIPTION 🦋

Based on the value of the compatible property, this routine will attempt to choose an appropriate alias value for a particular device tree node.

It does this by stripping the manufacturer prefix — as delimited by a ',' — from the first entry in the compatible list property. It’s giving “take the product-side bit and use that as the alias” energy, lowkey iconic 💫

---

⚠️ NOTE ⚠️

The matching on just the "product" side of the compatible is a relic from I2C and SPI. Please do not add any new user.

No cap, do not add a new user here 🙅‍♀️

---

🌈 RETURN 🌈

This routine returns 0 on success, <0 on failure. Slay when it’s 0, sad little <0 when it’s not 😭

---

👑 SEE ALSO 👑

Kernel file: ./drivers/of/base.c

• of_find_all_nodes(9)
• __of_device_is_compatible(9)
• of_machine_compatible_match(9)
• of_machine_read_compatible(9)
• of_machine_read_model(9)
• of_machine_get_match(9)
• of_machine_get_match_data(9)
• __of_device_is_available(9)
• __of_device_is_reserved(9)
• of_device_is_available(9)
• __of_device_is_fail(9)
• of_device_is_big_endian(9)
• of_get_parent(9)
• of_get_next_parent(9)
• of_get_next_child(9)
• of_get_next_child_with_prefix(9)
• of_get_next_available_child(9)
• of_get_next_reserved_child(9)
• of_get_next_cpu_node(9)
• of_get_compatible_child(9)
• of_get_child_by_name(9)
• of_get_available_child_by_name(9)
• of_find_node_opts_by_path(9)
• of_find_node_by_name(9)
• of_find_node_by_type(9)
• of_find_compatible_node(9)
• of_find_node_with_property(9)
• of_match_node(9)
• of_find_matching_node_and_match(9)
• of_find_node_by_phandle(9)
• of_parse_phandle_with_args_map(9)
• of_count_phandle_with_args(9)
• __of_add_property(9)
• of_add_property(9)
• of_remove_property(9)
• of_alias_scan(9)
• of_alias_get_id(9)
• of_alias_get_highest_id(9)
• of_console_check(9)
• of_find_next_cache_node(9)
• of_find_last_cache_level(9)
• of_map_id(9)
• of_map_iommu_id(9)
• of_map_msi_id(9)

---

mwah 💋 this little page comes from ./drivers/of, dated October 2026, and the manual name is of_alias_from_compatible(9). bye bestie, go read some device tree nodes 🧚💜