sdw_read_no_pm(9)

💖 sdw_read_no_pm(9) — like, the Kernel API Manual edition, bestie 💖

Okay so hi!! 👋 This is a page from the kernel API manual, and it's all about sdw_read_no_pm — which honestly does exactly what it says on the tin: it reads a SDW Slave register, and it does it with no PM. No power management, no extra steps, no drama, just a read. Periodt. ✨

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🌸 NAME 🌸

sdw_read_no_pm — Read a SDW Slave register with no PM 🎀

Like, that's the whole vibe. You wanna peek at a register on a SoundWire slave and you're not doing the PM dance around it. Slay. 💅

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✨ SYNOPSIS ✨

int sdw_read_no_pm (struct sdw_slave *slave , u32 addr );

That's the whole signature, bestie — it returns an int, takes a pointer to a struct sdw_slave, and a u32 address. Clean, simple, iconic. 👑

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🦋 ARGUMENTS 🦋

• slave — the SDW Slave. Like, the actual slave device you're talking to. It's a struct sdw_slave *, so yes, you pass the pointer. 🫶
• addr — the Register address. A u32, and it's literally just the address of the register you wanna read. No cap. 📍

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🔥 SEE ALSO 🔥

The kernel file lives at ./drivers/soundwire/bus.c, and here's the whole friend group of related calls — every single one, because we don't leave anyone out in this house: 🌈

• sdw_bus_master_add(9)
• sdw_bus_master_delete(9)
• sdw_transfer(9)
• sdw_show_ping_status(9)
• sdw_transfer_defer(9)
• sdw_nread_no_pm(9)
• sdw_nwrite_no_pm(9)
• sdw_write_no_pm(9)
• sdw_nread(9)
• sdw_nwrite(9)
• sdw_read(9)
• sdw_write(9)
• sdw_bus_prep_clk_stop(9)
• sdw_bus_clk_stop(9)
• sdw_bus_exit_clk_stop(9)
• sdw_handle_slave_status(9)

Not me listing all sixteen of these and still being obsessed — if you're looking for the PM-having version of a read, you probably want sdw_read(9) instead. Iykyk. 🙈

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Okay that's the whole page, bestie! 💜 This absolute gem comes from ./drivers/soundwire, dated October 2026, and it's filed under sdw_read_no_pm(9). Go read those registers (no PM!!) and stay iconic. 🧚⭐💖