of_device_is_big_endian(9)

💅 of_device_is_big_endian(9) — the bestie endianness check 💅

okay so this page lives in the Kernel API Manual, and the main character is of_device_is_big_endian(9). It checks if a device has BE registers, and honestly it's a tiny function with big “am I big-endian or not” energy. 🦋

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🌸 NAME 🌸

of_device_is_big_endian — check if a device has BE registers. that's the whole name, periodt. ✨

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🎀 SYNOPSIS 🎀

the signature is literally:

bool of_device_is_big_endian (const struct device_node *device );

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💖 ARGUMENTS 💖

• device — Node to check for endianness. this is the node, bestie: the one whose endianness vibe we're checking. 👑

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🔥 RETURN 🔥

True if the device has a "big-endian" property, or if the kernel was compiled for BE and the device has a "native-endian" property. Otherwise it returns false. no extra plot twists. 💀

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🌈 DESCRIPTION 🌈

Callers would nominally use ioread32be/iowrite32be if of_device_is_big_endian == true, or readl/writel otherwise. that's the intended usage, iykyk. 🫶

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👑 SEE ALSO 👑

the whole kernel file / function friend group situation:

• 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_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_alias_from_compatible(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)

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with love from the ./drivers/of corner of the Kernel API Manual, stamped October 2026, page of_device_is_big_endian(9) — slay and goodbye 🎀💖