home *** CD-ROM | disk | FTP | other *** search
- /*
- * linux/include/asm-arm/arch-omap/clockdomain.h
- *
- * OMAP2/3 clockdomain framework functions
- *
- * Copyright (C) 2008 Texas Instruments, Inc.
- * Copyright (C) 2008 Nokia Corporation
- *
- * Written by Paul Walmsley
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
- #ifndef __ASM_ARM_ARCH_OMAP_CLOCKDOMAIN_H
- #define __ASM_ARM_ARCH_OMAP_CLOCKDOMAIN_H
-
- #include <mach/powerdomain.h>
- #include <mach/clock.h>
- #include <mach/cpu.h>
-
- /* Clockdomain capability flags */
- #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_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)
-
- /* OMAP24XX CM_CLKSTCTRL_*.AUTOSTATE_* register bit values */
- #define OMAP24XX_CLKSTCTRL_DISABLE_AUTO 0x0
- #define OMAP24XX_CLKSTCTRL_ENABLE_AUTO 0x1
-
- /* OMAP3XXX CM_CLKSTCTRL_*.CLKTRCTRL_* register bit values */
- #define OMAP34XX_CLKSTCTRL_DISABLE_AUTO 0x0
- #define OMAP34XX_CLKSTCTRL_FORCE_SLEEP 0x1
- #define OMAP34XX_CLKSTCTRL_FORCE_WAKEUP 0x2
- #define OMAP34XX_CLKSTCTRL_ENABLE_AUTO 0x3
-
- /*
- * struct clkdm_pwrdm_autodep - a powerdomain that should have wkdeps
- * and sleepdeps added when a powerdomain should stay active in hwsup mode;
- * and conversely, removed when the powerdomain should be allowed to go
- * inactive in hwsup mode.
- */
- struct clkdm_pwrdm_autodep {
-
- /* Name of the powerdomain to add a wkdep/sleepdep on */
- const char *pwrdm_name;
-
- /* Powerdomain pointer (looked up at clkdm_init() time) */
- struct powerdomain *pwrdm;
-
- /* OMAP chip types that this clockdomain dep is valid on */
- const struct omap_chip_id omap_chip;
-
- };
-
- struct clockdomain {
-
- /* Clockdomain name */
- const char *name;
-
- /* Powerdomain enclosing this clockdomain */
- const char *pwrdm_name;
-
- /* CLKTRCTRL/AUTOSTATE field mask in CM_CLKSTCTRL reg */
- const u16 clktrctrl_mask;
-
- /* Clockdomain capability flags */
- const u8 flags;
-
- /* OMAP chip types that this clockdomain is valid on */
- const struct omap_chip_id omap_chip;
-
- /* Usecount tracking */
- atomic_t usecount;
-
- /* Powerdomain pointer assigned at clkdm_register() */
- struct powerdomain *pwrdm;
-
- struct list_head node;
-
- };
-
- void clkdm_init(struct clockdomain **clkdms, struct clkdm_pwrdm_autodep *autodeps);
- int clkdm_register(struct clockdomain *clkdm);
- int clkdm_unregister(struct clockdomain *clkdm);
- struct clockdomain *clkdm_lookup(const char *name);
-
- int clkdm_for_each(int (*fn)(struct clockdomain *clkdm));
- struct powerdomain *clkdm_get_pwrdm(struct clockdomain *clkdm);
-
- void omap2_clkdm_allow_idle(struct clockdomain *clkdm);
- void omap2_clkdm_deny_idle(struct clockdomain *clkdm);
-
- int omap2_clkdm_wakeup(struct clockdomain *clkdm);
- int omap2_clkdm_sleep(struct clockdomain *clkdm);
-
- int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk);
- int omap2_clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk);
-
- #endif
-