STRUCT GPIO_GENERIC_CHIP_CONFIG(9)

🌸 NAME 🌸

okay so this is the struct gpio..._chip_config(9) page from the Kernel API Manual, and the star of the show is struct gpio_generic_chip_config — literally the Generic GPIO chip configuration data bestie 💖

🌈 SYNOPSIS 🌈

struct gpio_generic_chip_config {
    struct device *dev;
    unsigned long sz;
    void __iomem *dat;
    void __iomem *set;
    void __iomem *clr;
    void __iomem *dirout;
    void __iomem *dirin;
    unsigned long flags;
 };

🎀 Members 🎀

okay bestie, here's the member-by-member vibe check — every field, no skips, no cap ✨

• dev — the parent device of the new GPIO chip. This one is compulsory — like, mandatory mandatory 💅
• sz — the size (width) of the MMIO registers in bytes, typically 1, 2, or 4 🎀
• dat — the MMIO address for the register to READ the value of the GPIO lines. The expectation is that a 1 in the corresponding bit in this register means the line is asserted 👑
• set — the MMIO address for the register to SET the value of the GPIO lines. The expectation is that we write the line with 1 in this register to drive the GPIO line high 🔥
• clr — the MMIO address for the register to CLEAR the value of the GPIO lines. The expectation is that we write the line with 1 in this register to drive the GPIO line low. It is allowed to leave this address as NULL — in that case the set register will be assumed to also clear the GPIO lines, by actively writing the line with 0 💀
• dirout — the MMIO address for the register to set the line as OUTPUT. It is assumed that setting a line to 1 in this register will turn that line into an output line. Conversely, setting the line to 0 will turn that line into an input 🦋
• dirin — the MMIO address for the register to set this line as INPUT. It is assumed that setting a line to 1 in this register will turn that line into an input line. Conversely, setting the line to 0 will turn that line into an output 🌈
• flags — different flags that will affect the behaviour of the device, such as endianness etc. 🫶

🦋 SEE ALSO 🦋

• Kernel file ./include/linux/gpio/generic.h struct gpio_generic_chip(9)
• gpio_generic_chip_set(9)
• gpio_generic_read_reg(9)
• gpio_generic_write_reg(9)

and that's the whole page, bestie 💖 this cutie comes from the ./include/linux/gpio source/version, dated October 2026 — mwah, periodt 💋✨