/* * 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_STANDBY_FORCE_WAKEUP BIT(7)
/** * 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 { constchar *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 { constchar *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 { constchar *name; union { constchar *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);
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