STRUCT SIFIVE_SERIAL_PORT(9)

💖 struct sifive_serial_port(9) 💖

okay so this is a page from the Kernel API Manual, and it's literally all about struct sifive_serial_port — bestie, it's the driver-specific data extension to struct uart_port. like, the uart_port gets to bring a whole extra little bag of snacks with it 🎀

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✨ NAME ✨

struct sifive_serial_port — driver-specific data extension to struct uart_port 💅

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🌸 SYNOPSIS 🌸

struct sifive_serial_port {
    struct uart_port        port;
    struct device           *dev;
    unsigned char           ier;
    unsigned long           baud_rate;
    struct clk              *clk;
    struct notifier_block   clk_notifier;
    bool console_line_ended;
 };

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🦋 Members 🦋

• port — the struct uart_port that lives embedded right inside this struct 🫶
• dev — a struct device *, no cap
• ier — a shadowed copy of the interrupt enable register ✨ (a shadow copy, like it's cosplaying the real register)
• baud_rate — the UART serial line rate, e.g. 115200 baud 🔥
• clk — a reference to this device's clock ⭐
• clk_notifier — the clock rate change notifier, for when the upstream clock changes its whole vibe 😭
• console_line_ended — tells you the console line is fully written, i.e. wrap it up, the line is done 👑

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💜 Description 💜

Configuration data specific to this SiFive UART. that's it, that's the whole description — it's giving "confident, concise, main character energy" 💀✨

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🌈 SEE ALSO 🌈

Kernel file ./drivers/tty/serial/sifive.c — and the whole friend group:

• __ssp_early_writel(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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and that's the whole page, bestie, you ate that 🍓💖 this gem came out of ./drivers/tty/serial and it's dated October 2026, so yeah — go forth and read your serial driver source, ily, mwah 💅✨🧚