1 files changed, 149 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/clockdomain.h b/arch/arm/mach-omap2/clockdomain.h
new file mode 100644
index 000000000000..372c64669868
--- /dev/null
+++ b/arch/arm/mach-omap2/clockdomain.h
@@ -0,0 +1,149 @@
+/*
+ * arch/arm/plat-omap/include/mach/clockdomain.h
+ *
+ * OMAP2/3 clockdomain framework functions
+ *
+ * Copyright (C) 2008 Texas Instruments, Inc.
+ * Copyright (C) 2008-2010 Nokia Corporation
+ *
+ * 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 __ARCH_ARM_MACH_OMAP2_CLOCKDOMAIN_H
+#define __ARCH_ARM_MACH_OMAP2_CLOCKDOMAIN_H
+
+#include <linux/init.h>
+
+#include <plat/powerdomain.h>
+#include <plat/clock.h>
+#include <plat/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)
+
+/**
+ * struct clkdm_autodep - clkdm deps to add when entering/exiting hwsup mode
+ * @clkdm: clockdomain to add wkdep+sleepdep on - set name member only
+ * @omap_chip: OMAP chip types that this autodep is valid on
+ *
+ * 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;
+        const struct omap_chip_id omap_chip;
+};
+
+/**
+ * struct clkdm_dep - encode dependencies between clockdomains
+ * @clkdm_name: clockdomain name
+ * @clkdm: pointer to the struct clockdomain of @clkdm_name
+ * @omap_chip: OMAP chip types that this dependency is valid on
+ * @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;
+        atomic_t wkdep_usecount;
+        atomic_t sleepdep_usecount;
+        const struct omap_chip_id omap_chip;
+};
+
+/**
+ * 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
+ * @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
+ * @omap_chip: OMAP chip types that this clockdomain is valid on
+ * @usecount: Usecount tracking
+ * @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;
+#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
+        const u16 clktrctrl_mask;
+#endif
+        const u8 flags;
+        const u8 dep_bit;
+        const u8 prcm_partition;
+        const s16 cm_inst;
+        const u16 clkdm_offs;
+        struct clkdm_dep *wkdep_srcs;
+        struct clkdm_dep *sleepdep_srcs;
+        const struct omap_chip_id omap_chip;
+        atomic_t usecount;
+        struct list_head node;
+};
+
+void clkdm_init(struct clockdomain **clkdms, struct clkdm_autodep *autodeps);
+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 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);
+
+extern void __init omap2_clockdomains_init(void);
+extern void __init omap44xx_clockdomains_init(void);
+
+#endif