rpmh_read(9)

💖 rpmh_read(9) — read a resource value 💖

okay so welcome to the Kernel API Manual page for rpmh_read(9), bestie. This one is short and sweet: it reads a resource value. No cap. ✨

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🌸 NAME 🌸

rpmh_read — Read a resource value. That's the whole name-section vibe. 💅

✨ SYNOPSIS ✨

the signature is literally:

int rpmh_read (const struct device *dev , struct tcs_cmd *cmd );

🎀 ARGUMENTS 🎀

• dev — the device making the request. It's the one doing the asking, okay? 🫶
• cmd — the payload having the address of the resource to read. Yes, this is the payload carrying the address. 💌

🦋 DESCRIPTION 🦋

okay so here's the tea: rpmh_read reads the value for the resource address given in tcs_cmd->addr, and returns the tcs_cmd->data filled with the same. So the address goes in, and the data comes back filled. Iconic. 💫

💅 CONTEXT 💅

⚠️ May sleep. Do not call from atomic contexts. ⚠️

This function may sleep, bestie, so do not call it from atomic contexts. That part is important — no atomic-context chaos allowed. 😭

🌈 RETURN 🌈

• 0 on success — slay ✅
• negative errno on failure — the sad path 💀

💜 SEE ALSO 💜

• Kernel file ./drivers/soc/qcom/rpmh.c
• struct cache_req(9)
• struct batch_cache_req(9)
• __rpmh_write(9)
• rpmh_write_async(9)
• rpmh_write(9)
• rpmh_write_batch(9)
• rpmh_flush(9)
• rpmh_invalidate(9)

source/version: ./drivers/soc/qcom · date: October 2026 · page: rpmh_read(9) — mwah, bestie 💋