arch/arm/mach-omap2/clockdomain.h

Source file repositories/reference/linux-study-clean/arch/arm/mach-omap2/clockdomain.h

File Facts

System
Linux kernel
Corpus path
arch/arm/mach-omap2/clockdomain.h
Extension
.h
Size
9988 bytes
Lines
244
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

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

Annotation

Implementation Notes