zynqmp_pm_se...ature_config(9)

okay bestie, so this is a page from the Kernel API Manual, and the header up top is literally zynqmp_pm_se...ature_config(9) (yes the kernel truncated it, that's just how it renders, don't come for me 😭). The function it's actually about is zynqmp_pm_set_feature_config. Let's get into it 💖

✨ NAME ✨

zynqmp_pm_set_feature_config — a PM call that requests an IOCTL for feature config 🎀

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🦋 SYNOPSIS 🦋

int zynqmp_pm_set_feature_config (enum pm_feature_config_id id , u32
       value );

Like, that's it. That's the whole vibe check. Two arguments, one int back. Slay 💅

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🌸 ARGUMENTS 🌸

• id — the config ID of the feature you're trying to configure, it's an enum pm_feature_config_id so it's the which feature part of the equation 🧚
• value — the config value of that feature, a u32, so it's the what do you want it set to part 🔥

Two little params, doing the absolute most. Main character energy fr fr.

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⭐ RETURN ⭐

Returns 0 on success, or an error value on failure. That's the whole story — zero means we ate, anything else means something went sideways 😭

ngl bestie, if you get a non-zero back, please actually check it? Don't just ignore the return value, that's giving chaos 🌈

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👑 SEE ALSO 👑

okay this list is long, so buckle up, but every single one of these is part of the family and they all deserve their shoutout 💜

From the kernel file ./drivers/firmware/xilinx/zynqmp.c:

struct zynqmp_devinfo(9), struct pm_api_feature_data(9), zynqmp_pm_ret_code(9), do_fw_call_smc(9), do_fw_call_hvc(9), zynqmp_pm_feature(9), zynqmp_pm_is_function_supported(9), zynqmp_pm_invoke_fw_fn(9), zynqmp_pm_invoke_fn(9), zynqmp_pm_get_api_version(9), zynqmp_pm_get_chipid(9), zynqmp_pm_get_family_info(9), zynqmp_pm_get_sip_svc_version(9), zynqmp_pm_get_trustzone_version(9), get_set_conduit_method(9), zynqmp_pm_query_data(9)

then the clock crew 🌸:

zynqmp_pm_clock_enable(9), zynqmp_pm_clock_disable(9), zynqmp_pm_clock_getstate(9), zynqmp_pm_clock_setdivider(9), zynqmp_pm_clock_getdivider(9), zynqmp_pm_clock_setparent(9), zynqmp_pm_clock_getparent(9), zynqmp_pm_set_pll_frac_mode(9), zynqmp_pm_get_pll_frac_mode(9), zynqmp_pm_set_pll_frac_data(9), zynqmp_pm_get_pll_frac_data(9), zynqmp_pm_set_sd_tapdelay(9), zynqmp_pm_sd_dll_reset(9), zynqmp_pm_ospi_mux_select(9)

the ggs/pggs besties (yes that's their real names, iconic) 🫶:

zynqmp_pm_write_ggs(9), zynqmp_pm_read_ggs(9), zynqmp_pm_write_pggs(9), zynqmp_pm_read_pggs(9), zynqmp_pm_set_boot_health_status(9), zynqmp_pm_reset_assert(9), zynqmp_pm_reset_get_status(9)

the FPGA + pinctrl girlies 🎀:

zynqmp_pm_fpga_load(9), zynqmp_pm_fpga_get_status(9), zynqmp_pm_fpga_get_config_status(9), zynqmp_pm_pinctrl_request(9), zynqmp_pm_pinctrl_release(9), zynqmp_pm_pinctrl_set_function(9), zynqmp_pm_pinctrl_get_config(9), zynqmp_pm_pinctrl_set_config(9)

boot mode + suspend + nodes 💫:

zynqmp_pm_bootmode_read(9), zynqmp_pm_bootmode_write(9), zynqmp_pm_init_finalize(9), zynqmp_pm_set_suspend_mode(9), zynqmp_pm_request_node(9), zynqmp_pm_release_node(9)

the RPU saga 😭:

zynqmp_pm_get_rpu_mode(9), zynqmp_pm_set_rpu_mode(9), zynqmp_pm_set_tcm_config(9), zynqmp_pm_get_node_status(9), zynqmp_pm_get_rpu_node_status(9), zynqmp_pm_force_pwrdwn(9), zynqmp_pm_request_wake(9), zynqmp_pm_start_rpu(9), zynqmp_pm_stop_rpu(9)

and the rest of the squad 🔥:

zynqmp_pm_set_requirement(9), zynqmp_pm_load_pdi(9), zynqmp_pm_efuse_access(9), zynqmp_pm_register_notifier(9), zynqmp_pm_system_shutdown(9), zynqmp_pm_get_feature_config(9), zynqmp_pm_sec_read_reg(9), zynqmp_pm_sec_mask_write_reg(9), zynqmp_pm_set_sd_config(9), zynqmp_pm_set_gem_config(9), struct zynqmp_pm_shutdown_scope(9), zynqmp_pm_is_shutdown_scope_valid(9), zynqmp_clear_pm_state(9)

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lowkey the move here is: if you're messing with feature config, you're probably also poking at zynqmp_pm_get_feature_config(9) — they're literally siblings, iykyk 👀

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and that's the whole page, bestie, no cap 🧚‍♀️ this gem came from ./drivers/firmware/xilinx, dated October 2026, page name zynqmp_pm_se...ature_config(9). go forth and configure your features responsibly 💖✨🎀