zl3073x_write_u48(9)

💅 zl3073x_write_u48(9) — Kernel API Manual

okay bestie, welcome to the zl3073x_write_u48(9) page from the Kernel API Manual ✨ this is the lil corner of the kernel that lives in ./drivers/dpll/zl3073x and honestly? she's iconic 🎀

---

🌸 NAME 🌸

zl3073x_write_u48 — write a value to a 48bit register 💖

✨ SYNOPSIS ✨

int zl3073x_write_u48 (struct zl3073x_dev *zldev , unsigned int reg ,
       u64 val );

like, that's the whole vibe: you hand her a device pointer, a register, and a value, and she just goes 🦋

🫶 ARGUMENTS 🫶

• zldev — the zl3073x device pointer. your main character, fr fr 👑
• reg — the register you're writing to. pick your target, bestie 🎯
• val — the value you're writing. the payload, the moment, the whole point 💫

💜 DESCRIPTION 💜

so what she does is: writes val into the given 48bit register. simple, clean, slay 💅

but — and this is the important part, no cap — the value must be from the interval -S48_MIN to U48_MAX. like, that's the range, and she's not flexible about it 🫠

bestie pls respect the interval, it's literally the whole vibe check for this function 😭

🔥 RETURN 🔥

• 0 on success 🎉
• <0 on error 💀

🌈 SEE ALSO 🌈

the kernel file is ./drivers/dpll/zl3073x/core.c and she's got a whole friend group of sibling functions, all listed here so nothing gets left out:

• zl3073x_read_u8(9)
• zl3073x_write_u8(9)
• zl3073x_read_u16(9)
• zl3073x_write_u16(9)
• zl3073x_read_u32(9)
• zl3073x_write_u32(9)
• zl3073x_read_u48(9)
• zl3073x_poll_zero_u8(9)
• zl3073x_do_hwreg_op(9)
• zl3073x_read_hwreg(9)
• zl3073x_write_hwreg(9)
• zl3073x_update_hwreg(9)
• zl3073x_write_hwreg_seq(9)
• zl3073x_ref_phase_offsets_update(9)
• zl3073x_ref_freq_meas_latch(9)
• zl3073x_ref_freq_meas_update(9)
• zl3073x_dev_phase_meas_setup(9)
• zl3073x_dev_start(9)
• zl3073x_dev_stop(9)
• zl3073x_dev_probe(9)

---

k bye bestie, mwah 🧚💖 — this page came from the ./drivers/dpll/zl3073x source, October 2026 version, and yes the title at the top and bottom both say zl3073x_write_u48(9) because consistency is hot ⭐