ufshcd_negotiate_pwr_params(9)

💖 ufshcd_negotiate_pwr_params(9) 💖

okay bestie, welcome to the Kernel API Manual 🎀 — yes that's the manual name, we're fancy here. Today's main character is ufshcd_negotiate_pwr_params, a lil function with a big job. Let's get into it ✨

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🌸 NAME 🌸

ufshcd_negotiate_pwr_params — literally its whole thing is finding power mode settings that are supported by both the controller and the device 🫶 like a group chat where everybody has to agree on the plan or nobody's going anywhere.

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✨ SYNOPSIS ✨

int ufshcd_negotiate_pwr_params (const struct ufs_host_params
*host_params , const struct ufs_pa_layer_attr *dev_max , struct
ufs_pa_layer_attr *agreed_pwr );

that's the whole signature, no cap 💅

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🦋 ARGUMENTS 🦋

• host_params — pointer to host parameters 👑 (the host's side of the story)
• dev_max — pointer to device attributes 🌈 (the device's side of the story)
• agreed_pwr — returned agreed attributes 🤝 (where the compromise gets written down — this is the main character of the output, honestly)

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⭐ RETURN ⭐

0 on success 🎉 — and a non-zero value on failure 😭 no middle ground, it's giving pass/fail semester.

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💜 SEE ALSO 💜

Kernel file ./drivers/ufs/host/ufshcd-pltfrm.c

and the whole friend group, fr fr:

• ufshcd_parse_regulator_info(9)
• ufshcd_parse_tx_eq_settings_for_gear(9)
• ufshcd_parse_clock_min_max_freq(9)
• ufshcd_parse_gear_limits(9)
• ufshcd_pltfrm_init(9)
• ufshcd_pltfrm_remove(9)

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🧚 tiny reminder: this page lives in ./drivers/ufs/host, dated October 2026, and it's page ufshcd_negotiate_pwr_params(9) of the Kernel API Manual — so if you're citing it, cite it cute 💅

k bye bestie, go negotiate those power params, slay 💖🔥👑