attr_capdata01_show(9)

💅 attr_capdata01_show(9) — kernel API manual, but make it make sense

okay so bestie, welcome to attr_capdata01_show(9) 💖 this is a page from the Kernel API Manual and honestly? it's a little guy with a big job. it reads out one property of an attribute and hands it back to you as text. let's get into it ✨

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🎀 NAME 🎀

attr_capdata01_show — get the value of the specified attribute property. that's it, that's the whole vibe 🫶

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🌸 SYNOPSIS 🌸

ssize_t attr_capdata01_show (struct kobject *kobj , struct
kobj_attribute *kattr , char *buf , struct tunable_attr_01 *tunable_attr
, enum attribute_property prop );

look at that signature, it's giving main character energy 👑

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🦋 ARGUMENTS 🦋

• kobj — pointer to the driver object. your driver's little home base 🏠
• kattr — pointer to the attribute calling this function. the one who knocked on the door 💅
• buf — the buffer to write to. this is where the tea gets poured ☕
• tunable_attr — the attribute to be read. the actual thing you're curious about 👀
• prop — the property of this attribute to be read. like, which specific detail of it 🌈

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⭐ DESCRIPTION ⭐

so what does it DO. it retrieves the given property from the capability data 01 struct, for the specified attribute's "custom" thermal mode 🔥 (yes, "custom" is in quotes, that's their naming, not mine, quote it exactly bestie).

the whole point? this function is intended to be generic, so literally any integer attribute's "_show" function can call it. one function, infinite callers. iconic, honestly 💀✨

and if the WMI is success, the sysfs attribute is notified 📣 — that's a real detail, keep it in your heart.

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💜 RETURN 💜

either the number of characters written to buf, or an error code. two outcomes, one function, no in-between 😭

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🌈 SEE ALSO 🌈

okay this list is LONG and we respect her for it. the kernel file lives at ./drivers/platform/x86/lenovo/wmi-other.c 📁 and here's everyone else in the group chat:

• lwmi_om_fan_get_set(9)
• lwmi_om_hwmon_is_visible(9)
• lwmi_om_hwmon_read(9)
• lwmi_om_hwmon_write(9)
• lwmi_om_hwmon_add(9)
• lwmi_om_hwmon_remove(9)
• lwmi_om_fan_info_init(9)
• lwmi_om_fan_info_collect_cd00(9)
• lwmi_om_fan_info_collect_cd_fan(9)
• lwmi_psy_ext_get_prop(9)
• lwmi_psy_ext_set_prop(9)
• lwmi_psy_prop_is_supported(9)
• lwmi_psy_prop_is_writeable(9)
• lwmi_add_battery(9)
• lwmi_remove_battery(9)
• lwmi_acpi_match(9)
• lwmi_om_psy_ext_init(9)
• lwmi_om_psy_remove(9)
• tunable_attr_01_id(9)
• int_type_show(9)
• attr_current_value_store(9)
• attr_current_value_show(9)
• lwmi_attr_01_is_supported(9)
• lwmi_om_fw_attr_add(9)
• lwmi_om_fw_attr_remove(9)
• lwmi_om_master_bind(9)
• lwmi_om_master_unbind(9)

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ngl bestie, that's twenty-eight references and every single one of them is staying in this page. no cap. don't come for me about trimming the list 💀

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and that's the page!! 🎀 the path is ./drivers/platform/x86/lenovo, the version is October 2026, and it's all filed under attr_capdata01_show(9) — go forth and read those properties, you absolute icon 👑💖✨