STRUCT I2C_MUX_GPIO_PLATFORM_DATA(9)

💖 struct i2c_mux_gpio_platform_data — NAME 💖

okay so bestie, welcome to struct i2c_mux_gpio_platform_data in the Kernel API Manual (section 9, iykyk) — it's literally the platform-dependent data for i2c-mux-gpio. that's it, that's the whole vibe check. she's a carrier struct for the GPIO-driven i2c mux and she's serving ✨

🌸 SYNOPSIS 🌸

here's the whole struct, character for character, no cap:

struct i2c_mux_gpio_platform_data {
    int parent;
    int base_nr;
    const unsigned *values;
    int n_values;
    unsigned idle;
    u32 settle_time;
 };

🎀 Members 🎀

every single field, explained with love:

• parent — the parent I2C bus adapter number. like, which bus is the mux hanging off of. 🫶
• base_nr — the base I2C bus number to number adapters from, or zero for dynamic. so if you want to decide the numbering yourself, drop it here; if you want the kernel to pick, just hand over a 0 and let her cook. 💅
• values — array of bitmasks of GPIO settings (low/high) for each position. one bitmask per mux position, each bit saying hi or low to a GPIO. obsessed. ✨
• n_values — number of multiplexer positions (busses to instantiate). it's giving headcount for the busses. 🦋
• idle — bitmask to write to the MUX when idle, or GPIO_I2CMUX_NO_IDLE if it's not used. yeah, that exact symbol, don't get creative with it. 🙈
• settle_time — delay to wait when a new bus is selected. muxes need a sec to settle in, same as the rest of us. 😭

ngl this struct is small but she's doing main character energy work — mux everything, slay.

🦋 SEE ALSO 🦋

• Kernel file ./include/linux/platform_data/i2c-mux-gpio.h — go read it bestie, it's right there 🔥

this page came from the kernel source under ./include/linux/platform_data, dated October 2026 — thanks for coming to my ted talk, mwah 💋 periodt. 🌈💜