| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * OMAP2/3 clockdomain framework functions |
| * |
| * Copyright (C) 2008, 2012 Texas Instruments, Inc. |
| * Copyright (C) 2008-2011 Nokia Corporation |
| * |
| * Paul Walmsley |
| */ |
| |
| #ifndef __ARCH_ARM_MACH_OMAP2_CLOCKDOMAIN_H |
| #define __ARCH_ARM_MACH_OMAP2_CLOCKDOMAIN_H |
| |
| #include <linux/init.h> |
| |
| #include "powerdomain.h" |
| #include "clock.h" |
| |
| /* |
| * Clockdomain flags |
| * |
| * XXX Document CLKDM_CAN_* flags |
| * |
| * CLKDM_NO_AUTODEPS: Prevent "autodeps" from being added/removed from this |
| * clockdomain. (Currently, this applies to OMAP3 clockdomains only.) |
| * CLKDM_ACTIVE_WITH_MPU: The PRCM guarantees that this clockdomain is |
| * active whenever the MPU is active. True for interconnects and |
| * the WKUP clockdomains. |
| * CLKDM_MISSING_IDLE_REPORTING: The idle status of the IP blocks and |
| * clocks inside this clockdomain are not taken into account by |
| * the PRCM when determining whether the clockdomain is idle. |
| * Without this flag, if the clockdomain is set to |
| * hardware-supervised idle mode, the PRCM may transition the |
| * enclosing powerdomain to a low power state, even when devices |
| * inside the clockdomain and powerdomain are in use. (An example |
| * of such a clockdomain is the EMU clockdomain on OMAP3/4.) If |
| * this flag is set, and the clockdomain does not support the |
| * force-sleep mode, then the HW_AUTO mode will be used to put the |
| * clockdomain to sleep. Similarly, if the clockdomain supports |
| * the force-wakeup mode, then it will be used whenever a clock or |
| * IP block inside the clockdomain is active, rather than the |
| * HW_AUTO mode. |
| */ |
| #define CLKDM_CAN_FORCE_SLEEP (1 << 0) |
| #define CLKDM_CAN_FORCE_WAKEUP (1 << 1) |
| #define CLKDM_CAN_ENABLE_AUTO (1 << 2) |
| #define CLKDM_CAN_DISABLE_AUTO (1 << 3) |
| #define CLKDM_NO_AUTODEPS (1 << 4) |
| #define CLKDM_ACTIVE_WITH_MPU (1 << 5) |
| #define CLKDM_MISSING_IDLE_REPORTING (1 << 6) |
| |
| #define CLKDM_CAN_HWSUP (CLKDM_CAN_ENABLE_AUTO | CLKDM_CAN_DISABLE_AUTO) |
| #define CLKDM_CAN_SWSUP (CLKDM_CAN_FORCE_SLEEP | CLKDM_CAN_FORCE_WAKEUP) |
| #define CLKDM_CAN_HWSUP_SWSUP (CLKDM_CAN_SWSUP | CLKDM_CAN_HWSUP) |
| |
| /** |
| * struct clkdm_autodep - clkdm deps to add when entering/exiting hwsup mode |
| * @clkdm: clockdomain to add wkdep+sleepdep on - set name member only |
| * |
| * A clockdomain that should have wkdeps and sleepdeps added when a |
| * clockdomain should stay active in hwsup mode; and conversely, |
| * removed when the clockdomain should be allowed to go inactive in |
| * hwsup mode. |
| * |
| * Autodeps are deprecated and should be removed after |
| * omap_hwmod-based fine-grained module idle control is added. |
| */ |
| struct clkdm_autodep { |
| union { |
| const char *name; |
| struct clockdomain *ptr; |
| } clkdm; |
| }; |
| |
| /** |
| * struct clkdm_dep - encode dependencies between clockdomains |
| * @clkdm_name: clockdomain name |
| * @clkdm: pointer to the struct clockdomain of @clkdm_name |
| * @wkdep_usecount: Number of wakeup dependencies causing this clkdm to wake |
| * @sleepdep_usecount: Number of sleep deps that could prevent clkdm from idle |
| * |
| * Statically defined. @clkdm is resolved from @clkdm_name at runtime and |
| * should not be pre-initialized. |
| * |
| * XXX Should also include hardware (fixed) dependencies. |
| */ |
| struct clkdm_dep { |
| const char *clkdm_name; |
| struct clockdomain *clkdm; |
| s16 wkdep_usecount; |
| s16 sleepdep_usecount; |
| }; |
| |
| /* Possible flags for struct clockdomain._flags */ |
| #define _CLKDM_FLAG_HWSUP_ENABLED BIT(0) |
| |
| struct omap_hwmod; |
| |
| /** |
| * struct clockdomain - OMAP clockdomain |
| * @name: clockdomain name |
| * @pwrdm: powerdomain containing this clockdomain |
| * @clktrctrl_reg: CLKSTCTRL reg for the given clock domain |
| * @clktrctrl_mask: CLKTRCTRL/AUTOSTATE field mask in CM_CLKSTCTRL reg |
| * @flags: Clockdomain capability flags |
| * @_flags: Flags for use only by internal clockdomain code |
| * @dep_bit: Bit shift of this clockdomain's PM_WKDEP/CM_SLEEPDEP bit |
| * @prcm_partition: (OMAP4 only) PRCM partition ID for this clkdm's registers |
| * @cm_inst: (OMAP4 only) CM instance register offset |
| * @clkdm_offs: (OMAP4 only) CM clockdomain register offset |
| * @wkdep_srcs: Clockdomains that can be told to wake this powerdomain up |
| * @sleepdep_srcs: Clockdomains that can be told to keep this clkdm from inact |
| * @usecount: Usecount tracking |
| * @forcewake_count: Usecount for forcing the domain active |
| * @node: list_head to link all clockdomains together |
| * |
| * @prcm_partition should be a macro from mach-omap2/prcm44xx.h (OMAP4 only) |
| * @cm_inst should be a macro ending in _INST from the OMAP4 CM instance |
| * definitions (OMAP4 only) |
| * @clkdm_offs should be a macro ending in _CDOFFS from the OMAP4 CM instance |
| * definitions (OMAP4 only) |
| */ |
| struct clockdomain { |
| const char *name; |
| union { |
| const char *name; |
| struct powerdomain *ptr; |
| } pwrdm; |
| const u16 clktrctrl_mask; |
| const u8 flags; |
| u8 _flags; |
| const u8 dep_bit; |
| const u8 prcm_partition; |
| const u16 cm_inst; |
| const u16 clkdm_offs; |
| struct clkdm_dep *wkdep_srcs; |
| struct clkdm_dep *sleepdep_srcs; |
| int usecount; |
| int forcewake_count; |
| struct list_head node; |
| u32 context; |
| }; |
| |
| /** |
| * struct clkdm_ops - Arch specific function implementations |
| * @clkdm_add_wkdep: Add a wakeup dependency between clk domains |
| * @clkdm_del_wkdep: Delete a wakeup dependency between clk domains |
| * @clkdm_read_wkdep: Read wakeup dependency state between clk domains |
| * @clkdm_clear_all_wkdeps: Remove all wakeup dependencies from the clk domain |
| * @clkdm_add_sleepdep: Add a sleep dependency between clk domains |
| * @clkdm_del_sleepdep: Delete a sleep dependency between clk domains |
| * @clkdm_read_sleepdep: Read sleep dependency state between clk domains |
| * @clkdm_clear_all_sleepdeps: Remove all sleep dependencies from the clk domain |
| * @clkdm_sleep: Force a clockdomain to sleep |
| * @clkdm_wakeup: Force a clockdomain to wakeup |
| * @clkdm_allow_idle: Enable hw supervised idle transitions for clock domain |
| * @clkdm_deny_idle: Disable hw supervised idle transitions for clock domain |
| * @clkdm_clk_enable: Put the clkdm in right state for a clock enable |
| * @clkdm_clk_disable: Put the clkdm in right state for a clock disable |
| * @clkdm_save_context: Save the current clkdm context |
| * @clkdm_restore_context: Restore the clkdm context |
| */ |
| struct clkdm_ops { |
| int (*clkdm_add_wkdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2); |
| int (*clkdm_del_wkdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2); |
| int (*clkdm_read_wkdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2); |
| int (*clkdm_clear_all_wkdeps)(struct clockdomain *clkdm); |
| int (*clkdm_add_sleepdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2); |
| int (*clkdm_del_sleepdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2); |
| int (*clkdm_read_sleepdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2); |
| int (*clkdm_clear_all_sleepdeps)(struct clockdomain *clkdm); |
| int (*clkdm_sleep)(struct clockdomain *clkdm); |
| int (*clkdm_wakeup)(struct clockdomain *clkdm); |
| void (*clkdm_allow_idle)(struct clockdomain *clkdm); |
| void (*clkdm_deny_idle)(struct clockdomain *clkdm); |
| int (*clkdm_clk_enable)(struct clockdomain *clkdm); |
| int (*clkdm_clk_disable)(struct clockdomain *clkdm); |
| int (*clkdm_save_context)(struct clockdomain *clkdm); |
| int (*clkdm_restore_context)(struct clockdomain *clkdm); |
| }; |
| |
| int clkdm_register_platform_funcs(struct clkdm_ops *co); |
| int clkdm_register_autodeps(struct clkdm_autodep *ia); |
| int clkdm_register_clkdms(struct clockdomain **c); |
| int clkdm_complete_init(void); |
| |
| struct clockdomain *clkdm_lookup(const char *name); |
| |
| int clkdm_for_each(int (*fn)(struct clockdomain *clkdm, void *user), |
| void *user); |
| struct powerdomain *clkdm_get_pwrdm(struct clockdomain *clkdm); |
| |
| int clkdm_add_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2); |
| int clkdm_del_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2); |
| int clkdm_read_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2); |
| int clkdm_clear_all_wkdeps(struct clockdomain *clkdm); |
| int clkdm_add_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2); |
| int clkdm_del_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2); |
| int clkdm_read_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2); |
| int clkdm_clear_all_sleepdeps(struct clockdomain *clkdm); |
| |
| void clkdm_allow_idle_nolock(struct clockdomain *clkdm); |
| void clkdm_allow_idle(struct clockdomain *clkdm); |
| void clkdm_deny_idle_nolock(struct clockdomain *clkdm); |
| void clkdm_deny_idle(struct clockdomain *clkdm); |
| |
| int clkdm_wakeup(struct clockdomain *clkdm); |
| int clkdm_sleep(struct clockdomain *clkdm); |
| |
| int clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk); |
| int clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk); |
| int clkdm_hwmod_enable(struct clockdomain *clkdm, struct omap_hwmod *oh); |
| int clkdm_hwmod_disable(struct clockdomain *clkdm, struct omap_hwmod *oh); |
| |
| void clkdm_save_context(void); |
| void clkdm_restore_context(void); |
| |
| extern void __init omap242x_clockdomains_init(void); |
| extern void __init omap243x_clockdomains_init(void); |
| extern void __init omap3xxx_clockdomains_init(void); |
| extern void __init am33xx_clockdomains_init(void); |
| extern void __init ti814x_clockdomains_init(void); |
| extern void __init ti816x_clockdomains_init(void); |
| extern void __init omap44xx_clockdomains_init(void); |
| extern void __init omap54xx_clockdomains_init(void); |
| extern void __init dra7xx_clockdomains_init(void); |
| void am43xx_clockdomains_init(void); |
| |
| extern void clkdm_add_autodeps(struct clockdomain *clkdm); |
| extern void clkdm_del_autodeps(struct clockdomain *clkdm); |
| |
| extern struct clkdm_ops omap2_clkdm_operations; |
| extern struct clkdm_ops omap3_clkdm_operations; |
| extern struct clkdm_ops omap4_clkdm_operations; |
| extern struct clkdm_ops am33xx_clkdm_operations; |
| extern struct clkdm_ops am43xx_clkdm_operations; |
| |
| extern struct clkdm_dep gfx_24xx_wkdeps[]; |
| extern struct clkdm_dep dsp_24xx_wkdeps[]; |
| extern struct clockdomain wkup_common_clkdm; |
| |
| #endif |
