_enable_sysc(9)

💅 _enable_sysc(9) — Kernel API Manual 💅

okay bestie, welcome to the _enable_sysc(9) page from the Kernel API Manual. it’s giving “tiny function, big hwmod energy,” and we’re gonna get through it together 🫶

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✨ NAME ✨

_enable_sysc — try to bring a module out of idle via OCP_SYSCONFIG 💅

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🦋 SYNOPSIS 🦋

void _enable_sysc (struct omap_hwmod *oh );

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🎀 ARGUMENTS 🎀

• oh — a struct omap_hwmod *. that’s the hwmod for the IP block we’re talking about, bestie 🎀

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🔥 DESCRIPTION 🔥

so the whole vibe here is: make sure the OCP_SYSCONFIG register for the IP block represented by oh is set to tell the PRCM that the IP block is active. literally just “hey PRCM, this one’s awake, no cap” ✨

usually that means placing the module into smart-idle mode and smart-standby. but if there is a bug in the automatic idle handling for the IP block, it may need to be placed into the force-idle or no-idle variants of these modes instead. so yeah, sometimes the auto-idle situation is a little messy and needs the manual route 💀

No return value. like, none. zero. it does the thing and dips 🙈

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🌈 SEE ALSO 🌈

Kernel file: ./arch/arm/mach-omap2/omap_hwmod.c — that’s the main character source file, fr fr 👑

and okay, the linked-lore lineup is HUGE, but every single one is here because we do not skip references in this house:

• struct clkctrl_provider(9)
• struct omap_hwmod_reset(9)
• struct omap_hwmod_soc_ops(9)
• _update_sysc_cache(9)
• _write_sysconfig(9)
• _set_master_standbymode(9)
• _set_slave_idlemode(9)
• _set_clockactivity(9)
• _set_softreset(9)
• _clear_softreset(9)
• _wait_softreset_complete(9)
• _set_dmadisable(9)
• _set_module_autoidle(9)
• _enable_wakeup(9)
• _add_initiator_dep(9)
• _del_initiator_dep(9)
• _init_main_clk(9)
• _init_interface_clks(9)
• _init_opt_clks(9)
• _enable_clocks(9)
• _omap4_clkctrl_managed_by_clkfwk(9)
• _omap4_has_clkctrl_clock(9)
• _disable_clocks(9)
• _omap4_enable_module(9)
• _omap4_wait_target_disable(9)
• _save_mpu_port_index(9)
• _find_mpu_rt_port(9)
• _idle_sysc(9)
• _shutdown_sysc(9)
• _lookup(9)
• _init_clkdm(9)
• _init_clocks(9)
• _lookup_hardreset(9)
• _assert_hardreset(9)
• _deassert_hardreset(9)
• _read_hardreset(9)
• _are_all_hardreset_lines_asserted(9)
• _are_any_hardreset_lines_asserted(9)
• _omap4_disable_module(9)
• _ocp_softreset(9)
• _reset(9)
• _omap4_update_context_lost(9)
• _omap4_get_context_lost(9)
• _enable(9)
• _idle(9)
• _shutdown(9)
• of_dev_hwmod_lookup(9)
• omap_hwmod_fix_mpu_rt_idx(9)
• omap_hwmod_parse_module_range(9)
• _init_mpu_rt_base(9)
• _init(9)
• _setup_iclk_autoidle(9)
• _setup_reset(9)
• _setup_postsetup(9)
• _setup(9)
• _register(9)
• _add_link(9)
• _register_link(9)
• _omap2xxx_3xxx_wait_target_ready(9)
• _omap4_wait_target_ready(9)
• _omap2_assert_hardreset(9)
• _omap2_deassert_hardreset(9)
• _omap2_is_hardreset_asserted(9)
• _omap4_assert_hardreset(9)
• _omap4_deassert_hardreset(9)
• _omap4_is_hardreset_asserted(9)
• _omap4_disable_direct_prcm(9)
• _am33xx_deassert_hardreset(9)
• omap_hwmod_softreset(9)
• omap_hwmod_lookup(9)
• omap_hwmod_for_each(9)
• omap_hwmod_register_links(9)
• _ensure_mpu_hwmod_is_setup(9)
• omap_hwmod_setup_one(9)
• omap_hwmod_check_sysc(9)
• omap_hwmod_init_regbits(9)
• omap_hwmod_init_reg_offs(9)
• omap_hwmod_init_sysc_flags(9)
• omap_hwmod_init_idlemodes(9)
• omap_hwmod_check_module(9)
• omap_hwmod_allocate_module(9)
• omap_hwmod_init_module(9)
• omap_hwmod_setup_earlycon_flags(9)
• omap_hwmod_setup_all(9)
• omap_hwmod_enable(9)
• omap_hwmod_idle(9)
• omap_hwmod_shutdown(9)
• omap_hwmod_get_mpu_rt_va(9)
• omap_hwmod_assert_hardreset(9)
• omap_hwmod_deassert_hardreset(9)
• omap_hwmod_for_each_by_class(9)
• omap_hwmod_set_postsetup_state(9)
• omap_hwmod_init(9)

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and that’s the page, bestie 💜 source/version: ./arch/arm/mach-omap2, date stamp: October 2026, and yeah — still _enable_sysc(9) 🎀✨