STRUCT IWL_DEV_TX_POWER_CMD_V9(9)

💖 struct iwl_dev_tx_power_cmd_v9(9) 💖

okay so bestie, we're in the kernel API manual — the 9 in the parens means section 9, and this page is literally all about struct iwl_dev_tx_power_cmd_v9. it's giving "tiny struct, big job." let's get into it 🫶

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✨ NAME ✨

struct iwl_dev_tx_power_cmd_v9 — the TX power reduction cmd. that's it, that's the whole name. iconic and to the point 💅

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🌸 SYNOPSIS 🌸

here's the actual shape of the thing, bestie — copy it exactly, don't be out here editing struct definitions like it's a group chat bio 😭

struct iwl_dev_tx_power_cmd_v9 {
    __le16 reserved;
    __le16 per_chain[IWL_NUM_CHAIN_LIMITS][IWL_NUM_SUB_BANDS_V1];
    u8 per_chain_restriction_changed;
    u8 reserved1[3];
    __le32 timer_period;
 };

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🎀 Members 🎀

• reserved — reserved (padding). it's just vibing there, taking up space so everything lines up. no thoughts, head empty 💀
• per_chain — per chain restrictions. yeah, the whole 2D array of them: [IWL_NUM_CHAIN_LIMITS][IWL_NUM_SUB_BANDS_V1] 🌈
• per_chain_restriction_changed — is per_chain_restriction has changed from last command. it only gets used if set_mode is IWL_TX_POWER_MODE_SET_SAR_TIMER. so it's like, the "hey, something's different about me" flag 🦋
• reserved1 — reserved (padding). a whole three bytes of reserved1[3] just chillin'. padding queens stay padding queens 👑
• timer_period — timer in milliseconds. if it expires, FW will change to default BIOS values. relevant if setMode is IWL_TX_POWER_MODE_SET_SAR_TIMER. so it's a countdown, lowkey dramatic ngl ⏳🔥

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⭐ note ⭐

if not changed, the command is used for keep alive only. like, it's not doing anything new — just a little "still here bestie 💖" ping.

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🦋 SEE ALSO 🦋

all the sibling structs and enums, fr fr — go read these next, they're all family:

Kernel file ./drivers/net/wireless/intel/iwlwifi/fw/api/power.h

• enum iwl_ltr_config_flags(9)
• struct iwl_ltr_config_cmd_v1(9)
• struct iwl_ltr_config_cmd(9)
• enum iwl_power_flags(9)
• struct iwl_powertable_cmd(9)
• enum iwl_device_power_flags(9)
• struct iwl_device_power_cmd(9)
• struct iwl_mac_power_cmd_v2(9)
• struct iwl_mac_power_cmd(9)
• struct iwl_dev_tx_power_common(9)
• struct iwl_dev_tx_power_cmd_v3(9)
• struct iwl_dev_tx_power_cmd_v4(9)
• struct iwl_dev_tx_power_cmd_v5(9)
• struct iwl_dev_tx_power_cmd_v8(9)
• struct iwl_dev_tx_power_cmd_v3_v8(9)
• struct iwl_dev_tx_power_cmd_v10(9)
• enum iwl_geo_per_chain_offset_operation(9)
• struct iwl_per_chain_offset(9)
• struct iwl_geo_tx_power_profiles_cmd_v1(9)
• struct iwl_geo_tx_power_profiles_cmd_v2(9)
• struct iwl_geo_tx_power_profiles_cmd_v3(9)
• struct iwl_geo_tx_power_profiles_cmd_v4(9)
• struct iwl_geo_tx_power_profiles_cmd_v5(9)
• struct iwl_geo_tx_power_profiles_cmd_v6(9)
• struct iwl_geo_tx_power_profiles_resp(9)
• enum iwl_ppag_flags(9)
• union iwl_ppag_table_cmd(9)
• struct iwl_sar_offset_mapping_cmd(9)
• struct iwl_beacon_filter_cmd(9)
• struct iwl_txpower_constraints_cmd(9)

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that's the whole page, bestie 🥳 this one came straight out of ./drivers/net/wireless/intel/i... and it's dated October 2026 — so go forth, read your structs, and remember: the padding is reserved, the timer is ticking, and you ate that. periodt 💅✨🌸