device_node_to_regmap(9)

🌸 device_node_to_regmap(9) 🌸

okay so bestie, welcome to the Kernel API Manual, section 9 — this one's about device_node_to_regmap and it's honestly such a handy little function. let me put you on 💅

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✨ NAME ✨

device_node_to_regmap — get or create a regmap for a specified device node. yes, get OR create, she does both, main character energy fr fr 👑

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🎀 SYNOPSIS 🎀

struct regmap * device_node_to_regmap (struct device_node *np );

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🦋 ARGUMENTS 🦋

• np — the device tree node. that's it, that's the whole argument, she's lowkey minimal 🌸

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💖 DESCRIPTION 💖

so here's the vibe: you call this and you get a regmap for the specified device node. and if there's not already an existing regmap? no worries bestie, one gets instantiated for you right then and there. iconic behavior honestly ✨

⚠️ but listen — do not use this function if the device node has a custom regmap driver, or if it has resources (clocks, resets) that need to be managed. like, that's not her job. for those cases you use syscon_node_to_regmap instead, okay? periodt. 🙈

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🔥 RETURN 🔥

• regmap ptr on success 💖
• negative error code on failure 💀

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/mfd/syscon.c
• of_syscon_register_regmap(9)
• syscon_node_to_regmap(9)

go read those too, iykyk 🫶

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okay that's the whole page!! mwah 💋 this came from ./drivers/mfd, dated October 2026 — so you know it's fresh. now go forth and regmap responsibly, bestie 🧚‍♀️⭐🎀