__ssp_writel(9)

💅 __ssp_writel — the Kernel API Manual girlies know ✨

okay so bestie, welcome to __ssp_writel, straight out of the Kernel API Manual (section 9, yes ma'am 👑), and it's literally about writing to a SiFive serial port register. that's the whole vibe. let's get into it 🎀

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✨ SYNOPSIS ✨

void __ssp_writel (u32 v , u16 offs , struct sifive_serial_port *ssp );

like, look at her. three args, returns void, zero drama 🦋

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🌸 ARGUMENTS 🌸

• v — the value you're gonna write into the register. that's it, that's the value. 🍓
• offs — the register address offset, measured from the IP block base address. lowkey important, don't fumble it 💀
• ssp — pointer to a struct sifive_serial_port record. your main character struct 🫶

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💖 DESCRIPTION 💖

so what she does: you hand her the value v, you tell her the offset offs from the IP block base, and you give her a pointer ssp to a struct sifive_serial_port record — and she writes that value into the IP block register sitting at that offset. iconic behavior, no cap ✨

like that's literally the entire job. write value → register. slay 💅

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🦋 CONTEXT 🦋

Any context. fr fr, any. she does not care, she's flexible like that 🌈

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🌟 SEE ALSO 🌟

okay this list is LONG and honestly she ate 👑

• Kernel file ./drivers/tty/serial/sifive.c
• struct sifive_serial_port(9)
• __ssp_early_writel(9)
• __ssp_early_readl(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)

ngl that's a whole friend group and she's the one holding the group chat together 😭💜

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reminder bestie: every single one of those is a real page, iykyk — go read them, they're all in ./drivers/tty/serial 💀✨

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and that's the page! mwah 💋 this one lives in ./drivers/tty/serial and the version/date stamp on it is October 2026 — so go forth and write those registers, bestie, you're gonna do amazing 🎀💖🌸🦋⭐