lwmi_acpi_match(9)

🌸 lwmi_acpi_match — bestie edition 🌸

okay so this is lwmi_acpi_match from section 9 of the Kernel API Manual, and honestly? it's giving tiny-but-important. it's a little ACPI callback that tries to hand you back the ideapad acpi handle 🎀

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✨ SYNOPSIS ✨

acpi_status lwmi_acpi_match (acpi_handle handle , u32 lvl , void *context , void **retval );

like, four args, and no cap, two of them are just vibing there doing nothing 💀

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🫶 ARGUMENTS 🫶

• handle — the ACPI handle that manages battery charging. this is the main character of the whole function fr 🔋
• lvl — unused. not me showing up to the group chat just to say nothing 🙈
• context — a void pointer to the acpi_handle object that you want to get back out. this is where the good stuff goes 💖
• retval — unused. again. iconic of it, honestly ✨

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💅 DESCRIPTION 💅

so here's the tea ☕ — first it checks whether the ideapad_laptop driver is going to manage charge_type. and if it's not? then it hooks the battery to our WMI methods instead. slay 💅

basically it's a vibe check on who gets to own the battery charging, and if ideapad_laptop says "not me", lwmi_acpi_match steps in. periodt 🔥

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⭐ RETURN ⭐

• AE_CTRL_TERMINATE — if found ✅
• AE_OK — if not found 🦋

that's it, that's the whole return situation. short and sweet, iykyk 💜

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🌈 SEE ALSO 🌈

the kernel file lives at:

./drivers/platform/x86/lenovo/wmi-other.c

and here's the whole friend group 💖 — go say hi:

• 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_om_psy_ext_init(9)
• lwmi_om_psy_remove(9)
• tunable_attr_01_id(9)
• int_type_show(9)
• attr_capdata01_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 the whole fam is in ./drivers/platform/x86/lenovo, so if you get lost just go back to that directory bestie 🧭💖

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and that's the page!! 🎀 written under the ./drivers/platform/x86/lenovo banner, October 2026 edition, mwah 💋✨