__ssp_readl(9)

💖 NAME 💖

__ssp_readl — read from a SiFive serial port register. This is the __ssp_readl(9) page from the Kernel API Manual, bestie — welcome, you’re gonna slay this one ✨.

✨ SYNOPSIS ✨

the signature, exactly as it is:

u32 __ssp_readl (struct sifive_serial_port *ssp , u16 offs );

🫶 ARGUMENTS 🫶

• ssp — pointer to a struct sifive_serial_port record. It’s the pointer bestie, okay? The one that tells you which serial-port record we’re vibing with.
• offs — register address offset from the IP block base address. So it’s the offset from the IP block base; that’s the whole assignment.

🌸 DESCRIPTION 🌸

Okay so here’s the tea: you pass in ssp, a pointer to a struct sifive_serial_port record, and offs, the register address offset from the IP block base address. This function reads the contents of the IP block register located at offset offs from the IP block base. That’s it. Lowkey iconic for how straightforward it is 💅.

🦋 CONTEXT 🦋

Any context. Literally any. No cap, bestie 🦋.

⭐ RETURN ⭐

You get back the value of the UART register — that’s the return, periodt ⭐.

👑 SEE ALSO 👑

Peep the SEE ALSO crew — no skips, bestie:

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

mwah 💋 — this page is from ./drivers/tty/serial, dated October 2026. byeee bestie, go read those registers responsibly 🎀💖