STRUCT MAX197_DATA(9)

🌸 struct max197_data(9) — Kernel API Manual 🌸

okay so bestie, welcome to the kernel API manual, and today's main character is struct max197_data — the little vibe-holder that keeps track of device instance specific data 🎀 like, it's literally the per-instance brain cell for the MAX197 driver, and we're gonna get to know every single field, no skips, no cap 💅

✨ NAME ✨

struct max197_data — device instance specific data 🦋

✨ SYNOPSIS ✨

struct max197_data {
    struct max197_platform_data *pdata;
    struct device *hwmon_dev;
    struct mutex lock;
    int limit;
    bool scale;
    u8 ctrl_bytes[MAX197_NUM_CH];
};

look at her. iconic struct. she's got a pointer, a pointer, a mutex, an int, a bool, and a whole array of u8 — and every single one of them is doing something, so let's go member by member 🫶

✨ Members ✨

• pdata — the platform data 💖 literally the platform data, handed in from outside, living its best life as a struct max197_platform_data *.
• hwmon_dev — the hwmon device ✨ that's the hwmon device right there, a struct device *.
• lock — the read/write mutex 🔒 like, this is the struct mutex that guards the read/writes — one thread at a time besties, no cutting in line.
• limit — the max range value 🔥 and listen, this is a hot detail: it's 10V for MAX197, 4V for MAX199. two totally different vibes, one field.
• scale — need to scale 🧚 a bool that just says whether we need to scale or not. simple. elegant. serving.
• ctrl_bytes — channels control byte 💜 it's a u8 array of size MAX197_NUM_CH, and it holds the channels control byte. periodt.

🌈 SEE ALSO 🌈

• <cyan>Kernel file ./drivers/hwmon/max197.c</cyan> — go read the source bestie, that's where all the lore lives 📖

ngl if you're digging into ./drivers/hwmon/max197.c you're already doing amazing, go off 👑

and that's the page!! this little beauty comes to you from ./drivers/hwmon, dated October 2026 — mwah, love u, bye 💅💖🌸