STRUCT IS31FL32XX_CHIPDEF(9)

👑 NAME 👑

struct is31fl32xx_chipdef — chip-specific attributes.

okay so this is the struct is31fl32xx_chipdef(9) page from the Kernel API Manual, and we're gonna get into every chip-specific attribute together, bestie. 💖

✨ SYNOPSIS ✨

the whole struct, no cap:

       struct is31fl32xx_chipdef {
           u8 channels;
           u8 shutdown_reg;
           u8 pwm_update_reg;
           u8 pwm_update_value;
           u8 global_control_reg;
           u8 reset_reg;
           u8 output_frequency_setting_reg;
           u8 pwm_register_base;
           bool pwm_registers_reversed;
           u8 led_control_register_base;
           u8 enable_bits_per_led_control_register;
           u16 brightness_steps;
           int (*reset_func)(struct is31fl32xx_priv *priv);
           int (*sw_shutdown_func)(struct is31fl32xx_priv *priv, bool enable);
        };

🎀 Members 🎀

• channels — Number of LED channels
• shutdown_reg — address of Shutdown register (optional)
• pwm_update_reg — address of PWM Update register
• pwm_update_value — value to write to PWM Update register
• global_control_reg — address of Global Control register (optional)
• reset_reg — address of Reset register (optional)
• output_frequency_setting_reg — address of output frequency register (optional)
• pwm_register_base — address of first PWM register
• pwm_registers_reversed — : true if PWM registers count down instead of up 🌀
• led_control_register_base — address of first LED control register (optional)
• enable_bits_per_led_control_register — number of LEDs enable bits in each
• brightness_steps — number of brightness steps supported by the chip
• reset_func — pointer to reset function
• sw_shutdown_func — pointer to software shutdown function

💖 Description 💖

For all optional register addresses, the sentinel value IS31FL32XX_REG_NONE means this chip has no such register. 🫶

If reset_func is non-NULL, it will be called during probing to set all necessary registers to a known initialization state. This is needed for chips that do not have a reset_reg.

bestie, this is a hard requirement, not a suggestion: enable_bits_per_led_control_register must be >=1 if led_control_register_base != IS31FL32XX_REG_NONE. 👑

🌈 SEE ALSO 🌈

• Kernel file ./drivers/leds/leds-is31fl32xx.c

mwah 💋 — source/version ./drivers/leds, date October 2026, page struct is31fl32xx_chipdef(9).