sdio_get_host_pm_caps(9)

💅 sdio_get_host_pm_caps(9)

okay so bestie, welcome to the Kernel API Manual ✨ — yes we're reading manpages now, this is our era. Today's main character is sdio_get_host_pm_caps, and it's genuinely so useful, let me tell you everything 🫶

---

🌸 NAME

sdio_get_host_pm_caps — literally just "get host power management capabilities", no cap 💅

---

✨ SYNOPSIS

mmc_pm_flag_t sdio_get_host_pm_caps (struct sdio_func *func );

---

🎀 ARGUMENTS

• func — the SDIO function attached to the host 💖 that's the one thing you gotta hand over, bestie.

---

🦋 DESCRIPTION

So this one returns a capability bitmask — think of it as a little sparkly checklist ✨ — and that bitmask corresponds to all the power management features that the host controller supports, the ones the card function might be relying on during a system suspend 😴

And here's the iconic part: the host does not need to be claimed, and the function doesn't need to be active either. You can just… get this info 🤯 no prerequisites, no vibe check required, it's giving effortless 👑

---

💜 SEE ALSO

Kernel file ./drivers/mmc/core/sdio_io.c — go look, it's all in there, iykyk 📂

The whole friend group, fr fr:

• sdio_claim_host(9)
• sdio_release_host(9)
• sdio_enable_func(9)
• sdio_disable_func(9)
• sdio_set_block_size(9)
• sdio_align_size(9)
• sdio_readb(9)
• sdio_writeb(9)
• sdio_writeb_readb(9)
• sdio_memcpy_fromio(9)
• sdio_memcpy_toio(9)
• sdio_readsb(9)
• sdio_writesb(9)
• sdio_readw(9)
• sdio_writew(9)
• sdio_readl(9)
• sdio_writel(9)
• sdio_f0_readb(9)
• sdio_f0_writeb(9)
• sdio_set_host_pm_flags(9)
• sdio_retune_crc_disable(9)
• sdio_retune_crc_enable(9)
• sdio_retune_hold_now(9)
• sdio_retune_release(9)

---

and that's the whole page bestie, you ate that 💅✨

this little love letter came from ./drivers/mmc/core, dated October 2026, and it's filed under sdio_get_host_pm_caps(9) — go forth and slay your suspend logic 🌈👑💖