__ssp_early_writel(9)

✨ __ssp_early_writel(9) ✨

okay bestie, welcome to the Kernel API Manual 💖 this one is a lil function from the SiFive serial driver and it's literally just "put a value in a register, but make it early" 🎀

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🌸 NAME 🌸

__ssp_early_writel — write to a SiFive serial port register (early) 🦋

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⭐ SYNOPSIS ⭐

void __ssp_early_writel (u32 v , u16 offs , struct uart_port *port );

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💅 ARGUMENTS 💅

• v — the value you're writing into the register, that's it, that's the whole vibe ✨
• offs — the register address offset, measured from the IP block base address 📍
• port — a pointer to a struct uart_port record, the main character of this whole story 👑

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🫶 DESCRIPTION 🫶

so you hand it a pointer port to a struct uart_port record, and it writes the value v to the IP block register address offset offs. simple as that, no cap 💀

this one is intended for early console use — like, before all the fancy stuff is up and running 🌈

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🔥 CONTEXT 🔥

fr fr, this is intended to be used only by the earlyconsole code. not a general-purpose lil guy, okay? respect the lane 🙈

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🧚 SEE ALSO 🧚

• Kernel file ./drivers/tty/serial/sifive.c
• struct sifive_serial_port(9)
• __ssp_early_readl(9)
• __ssp_writel(9)
• __ssp_readl(9)
• sifive_serial_is_txfifo_full(9)
• __ssp_transmit_char(9)
• __ssp_transmit_chars(9)
• __ssp_enable_txwm(9)
• __ssp_enable_rxwm(9)
• __ssp_disable_txwm(9)
• __ssp_disable_rxwm(9)
• __ssp_receive_char(9)
• __ssp_receive_chars(9)
• __ssp_update_div(9)
• __ssp_update_baud_rate(9)
• __ssp_set_stop_bits(9)
• __ssp_wait_for_xmitr(9)
• sifive_serial_clk_notifier(9)

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lowkey obsessed with how many friends this function has in ./drivers/tty/serial 🍓

k that's the whole page bestie, go forth and write registers 💜

shoutout to the ./drivers/tty/serial source and the October 2026 version, mwah 😘