STRUCT AT91_PINCTRL_MUX_OPS(9)

💅 struct at91_pinctrl_mux_ops — the AT91 mux ops glow-up

okay bestie, welcome to the Kernel API Manual, section 9. today's main character is struct at91_pinctrl_mux_ops, and honestly? it's giving "the glow-up era of AT91 pinctrl." ✨

🦋 NAME

struct at91_pinctrl_mux_ops — describes an AT91 mux ops group on new IP. with support for periph C and D, the way to mux in periph A and B has changed, so provide the right call back. if a callback isn't present, that means the IP does not support it. periodt. 💅

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🌸 SYNOPSIS

struct at91_pinctrl_mux_ops {
    enum at91_mux (*get_periph)(void __iomem *pio, unsigned mask);
    void (*mux_A_periph)(void __iomem *pio, unsigned mask);
    void (*mux_B_periph)(void __iomem *pio, unsigned mask);
    void (*mux_C_periph)(void __iomem *pio, unsigned mask);
    void (*mux_D_periph)(void __iomem *pio, unsigned mask);
    bool (*get_deglitch)(void __iomem *pio, unsigned pin);
    void (*set_deglitch)(void __iomem *pio, unsigned mask, bool is_on);
    bool (*get_debounce)(void __iomem *pio, unsigned pin, u32 *div);
    void (*set_debounce)(void __iomem *pio, unsigned mask, bool is_on, u32 div);
    bool (*get_pulldown)(void __iomem *pio, unsigned pin);
    void (*set_pulldown)(void __iomem *pio, unsigned mask, bool is_on);
    bool (*get_schmitt_trig)(void __iomem *pio, unsigned pin);
    void (*disable_schmitt_trig)(void __iomem *pio, unsigned mask);
    unsigned (*get_drivestrength)(void __iomem *pio, unsigned pin);
    void (*set_drivestrength)(void __iomem *pio, unsigned pin, u32 strength);
    unsigned (*get_slewrate)(void __iomem *pio, unsigned pin);
    void (*set_slewrate)(void __iomem *pio, unsigned pin, u32 slewrate);
    int (*irq_type)(struct irq_data *d, unsigned type);
 };

like, look at all those function pointers. it's a whole roster. a whole squad. 🫶

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👑 Members

here's the cast, bestie — every single one, no skips:

• get_periph — return the periph mode configured.
• mux_A_periph — mux as periph A.
• mux_B_periph — mux as periph B.
• mux_C_periph — mux as periph C.
• mux_D_periph — mux as periph D.
• get_deglitch — get deglitch status.
• set_deglitch — enable/disable deglitch.
• get_debounce — get debounce status.
• set_debounce — enable/disable debounce.
• get_pulldown — get pulldown status.
• set_pulldown — enable/disable pulldown.
• get_schmitt_trig — get schmitt trigger status.
• disable_schmitt_trig — disable schmitt trigger.
• get_drivestrength — get driver strength.
• set_drivestrength — set driver strength.
• get_slewrate — get slew rate.
• set_slewrate — set slew rate.
• irq_type — return irq type.

🩷 remember the NAME-section rule: if a call back is not present, that means the IP does not support it. no callback = no vibes for that feature, and that's not a bug, that's just the hardware.

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🔥 SEE ALSO

go read these, iykyk:

• Kernel file ./drivers/pinctrl/pinctrl-at91.c
• struct at91_gpio_chip(9)
• struct at91_pmx_func(9)
• struct at91_pmx_pin(9)
• struct at91_pin_group(9)

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that's the whole page, bestie 💖 this icon lived in ./drivers/pinctrl, dated October 2026, and it will forever be struct at91_pinctrl_mux_ops(9) in our hearts. mwah. 🎀🦋💜