of_device_is...r_controller(9)

💖 of_device_is...r_controller(9) 💖

okay bestie, so this one is a page from the Kernel API Manual and it's lowkey tiny but it's mighty, so let's get into it ✨

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🌸 NAME 🌸

of_device_is_system_power_controller — the function that tells you if system-power-controller is found for a device_node. that's it, that's the whole gig 💅

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🦋 SYNOPSIS 🦋

bool of_device_is_system_power_controller (const struct device_node *np
);

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🎀 ARGUMENTS 🎀

• np — it's a pointer to the given device_node, bestie. that's the thing you're asking about 🫶

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⭐ RETURN ⭐

it gives you true if it's present, and false otherwise. binary queen behavior, no in-between, no "it depends" 😌

ngl this is the shortest return section i've ever seen and honestly? iconic. nothing extra, nothing messy, just vibes and a bool 🔥

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🌈 SEE ALSO 🌈

so there's a whole friend group here and they all live in the kernel file ./include/linux/of.h — go say hi to all of them 💜

• of_node_init(9)
• of_machine_is_compatible(9)
• of_parse_phandle(9)
• of_parse_phandle_with_args(9)
• of_parse_phandle_with_fixed_args(9)
• of_parse_phandle_with_optional_args(9)
• of_phandle_args_equal(9)
• of_property_count_u8_elems(9)
• of_property_count_u16_elems(9)
• of_property_count_u32_elems(9)
• of_property_count_u64_elems(9)
• of_property_read_string_array(9)
• of_property_count_strings(9)
• of_property_read_string_index(9)
• of_property_present(9)
• of_property_read_u8_array(9)
• of_property_read_u16_array(9)
• of_property_read_u32_array(9)
• of_property_read_u64_array(9)
• struct of_changeset_entry(9)
• struct of_changeset(9)
• of_have_populated_dt(9)

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and that's the whole page, bestie, you ate that 🍓 this little gem lives under ./include/linux and it's dated October 2026, so yeah — it's giving future icon, periodt ✨👑💖