1 files changed, 619 insertions, 0 deletions

diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h
new file mode 100644
index 00000000000..0e329ca88a7
--- /dev/null
+++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h
@@ -0,0 +1,619 @@
+/*
+ * omap_hwmod macros, structures
+ *
+ * Copyright (C) 2009-2011 Nokia Corporation
+ * Copyright (C) 2011 Texas Instruments, Inc.
+ * Paul Walmsley
+ *
+ * Created in collaboration with (alphabetical order): Benoît Cousson,
+ * Kevin Hilman, Tony Lindgren, Rajendra Nayak, Vikram Pandita, Sakari
+ * Poussa, Anand Sawant, Santosh Shilimkar, Richard Woodruff
+ *
+ * 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.
+ *
+ * These headers and macros are used to define OMAP on-chip module
+ * data and their integration with other OMAP modules and Linux.
+ * Copious documentation and references can also be found in the
+ * omap_hwmod code, in arch/arm/mach-omap2/omap_hwmod.c (as of this
+ * writing).
+ *
+ * To do:
+ * - add interconnect error log structures
+ * - add pinmuxing
+ * - init_conn_id_bit (CONNID_BIT_VECTOR)
+ * - implement default hwmod SMS/SDRC flags?
+ * - move Linux-specific data ("non-ROM data") out
+ *
+ */
+#ifndef __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_HWMOD_H
+#define __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_HWMOD_H
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/ioport.h>
+#include <linux/spinlock.h>
+#include <plat/cpu.h>
+
+struct omap_device;
+
+extern struct omap_hwmod_sysc_fields omap_hwmod_sysc_type1;
+extern struct omap_hwmod_sysc_fields omap_hwmod_sysc_type2;
+
+/*
+ * OCP SYSCONFIG bit shifts/masks TYPE1. These are for IPs compliant
+ * with the original PRCM protocol defined for OMAP2420
+ */
+#define SYSC_TYPE1_MIDLEMODE_SHIFT      12
+#define SYSC_TYPE1_MIDLEMODE_MASK       (0x3 << SYSC_MIDLEMODE_SHIFT)
+#define SYSC_TYPE1_CLOCKACTIVITY_SHIFT  8
+#define SYSC_TYPE1_CLOCKACTIVITY_MASK   (0x3 << SYSC_CLOCKACTIVITY_SHIFT)
+#define SYSC_TYPE1_SIDLEMODE_SHIFT      3
+#define SYSC_TYPE1_SIDLEMODE_MASK       (0x3 << SYSC_SIDLEMODE_SHIFT)
+#define SYSC_TYPE1_ENAWAKEUP_SHIFT      2
+#define SYSC_TYPE1_ENAWAKEUP_MASK       (1 << SYSC_ENAWAKEUP_SHIFT)
+#define SYSC_TYPE1_SOFTRESET_SHIFT      1
+#define SYSC_TYPE1_SOFTRESET_MASK       (1 << SYSC_SOFTRESET_SHIFT)
+#define SYSC_TYPE1_AUTOIDLE_SHIFT       0
+#define SYSC_TYPE1_AUTOIDLE_MASK        (1 << SYSC_AUTOIDLE_SHIFT)
+
+/*
+ * OCP SYSCONFIG bit shifts/masks TYPE2. These are for IPs compliant
+ * with the new PRCM protocol defined for new OMAP4 IPs.
+ */
+#define SYSC_TYPE2_SOFTRESET_SHIFT      0
+#define SYSC_TYPE2_SOFTRESET_MASK       (1 << SYSC_TYPE2_SOFTRESET_SHIFT)
+#define SYSC_TYPE2_SIDLEMODE_SHIFT      2
+#define SYSC_TYPE2_SIDLEMODE_MASK       (0x3 << SYSC_TYPE2_SIDLEMODE_SHIFT)
+#define SYSC_TYPE2_MIDLEMODE_SHIFT      4
+#define SYSC_TYPE2_MIDLEMODE_MASK       (0x3 << SYSC_TYPE2_MIDLEMODE_SHIFT)
+
+/* OCP SYSSTATUS bit shifts/masks */
+#define SYSS_RESETDONE_SHIFT            0
+#define SYSS_RESETDONE_MASK             (1 << SYSS_RESETDONE_SHIFT)
+
+/* Master standby/slave idle mode flags */
+#define HWMOD_IDLEMODE_FORCE            (1 << 0)
+#define HWMOD_IDLEMODE_NO               (1 << 1)
+#define HWMOD_IDLEMODE_SMART            (1 << 2)
+#define HWMOD_IDLEMODE_SMART_WKUP       (1 << 3)
+
+/* modulemode control type (SW or HW) */
+#define MODULEMODE_HWCTRL               1
+#define MODULEMODE_SWCTRL               2
+
+
+/**
+ * struct omap_hwmod_mux_info - hwmod specific mux configuration
+ * @pads:              array of omap_device_pad entries
+ * @nr_pads:           number of omap_device_pad entries
+ *
+ * Note that this is currently built during init as needed.
+ */
+struct omap_hwmod_mux_info {
+        int                             nr_pads;
+        struct omap_device_pad          *pads;
+        int                             nr_pads_dynamic;
+        struct omap_device_pad          **pads_dynamic;
+        bool                            enabled;
+};
+
+/**
+ * struct omap_hwmod_irq_info - MPU IRQs used by the hwmod
+ * @name: name of the IRQ channel (module local name)
+ * @irq: IRQ channel ID (should be non-negative except -1 = terminator)
+ *
+ * @name should be something short, e.g., "tx" or "rx".  It is for use
+ * by platform_get_resource_byname().  It is defined locally to the
+ * hwmod.
+ */
+struct omap_hwmod_irq_info {
+        const char      *name;
+        s16             irq;
+};
+
+/**
+ * struct omap_hwmod_dma_info - DMA channels used by the hwmod
+ * @name: name of the DMA channel (module local name)
+ * @dma_req: DMA request ID (should be non-negative except -1 = terminator)
+ *
+ * @name should be something short, e.g., "tx" or "rx".  It is for use
+ * by platform_get_resource_byname().  It is defined locally to the
+ * hwmod.
+ */
+struct omap_hwmod_dma_info {
+        const char      *name;
+        s16             dma_req;
+};
+
+/**
+ * struct omap_hwmod_rst_info - IPs reset lines use by hwmod
+ * @name: name of the reset line (module local name)
+ * @rst_shift: Offset of the reset bit
+ * @st_shift: Offset of the reset status bit (OMAP2/3 only)
+ *
+ * @name should be something short, e.g., "cpu0" or "rst". It is defined
+ * locally to the hwmod.
+ */
+struct omap_hwmod_rst_info {
+        const char      *name;
+        u8              rst_shift;
+        u8              st_shift;
+};
+
+/**
+ * struct omap_hwmod_opt_clk - optional clocks used by this hwmod
+ * @role: "sys", "32k", "tv", etc -- for use in clk_get()
+ * @clk: opt clock: OMAP clock name
+ * @_clk: pointer to the struct clk (filled in at runtime)
+ *
+ * The module's interface clock and main functional clock should not
+ * be added as optional clocks.
+ */
+struct omap_hwmod_opt_clk {
+        const char      *role;
+        const char      *clk;
+        struct clk      *_clk;
+};
+
+
+/* omap_hwmod_omap2_firewall.flags bits */
+#define OMAP_FIREWALL_L3                (1 << 0)
+#define OMAP_FIREWALL_L4                (1 << 1)
+
+/**
+ * struct omap_hwmod_omap2_firewall - OMAP2/3 device firewall data
+ * @l3_perm_bit: bit shift for L3_PM_*_PERMISSION_*
+ * @l4_fw_region: L4 firewall region ID
+ * @l4_prot_group: L4 protection group ID
+ * @flags: (see omap_hwmod_omap2_firewall.flags macros above)
+ */
+struct omap_hwmod_omap2_firewall {
+        u8 l3_perm_bit;
+        u8 l4_fw_region;
+        u8 l4_prot_group;
+        u8 flags;
+};
+
+
+/*
+ * omap_hwmod_addr_space.flags bits
+ *
+ * ADDR_MAP_ON_INIT: Map this address space during omap_hwmod init.
+ * ADDR_TYPE_RT: Address space contains module register target data.
+ */
+#define ADDR_MAP_ON_INIT        (1 << 0)        /* XXX does not belong */
+#define ADDR_TYPE_RT            (1 << 1)
+
+/**
+ * struct omap_hwmod_addr_space - address space handled by the hwmod
+ * @name: name of the address space
+ * @pa_start: starting physical address
+ * @pa_end: ending physical address
+ * @flags: (see omap_hwmod_addr_space.flags macros above)
+ *
+ * Address space doesn't necessarily follow physical interconnect
+ * structure.  GPMC is one example.
+ */
+struct omap_hwmod_addr_space {
+        const char *name;
+        u32 pa_start;
+        u32 pa_end;
+        u8 flags;
+};
+
+
+/*
+ * omap_hwmod_ocp_if.user bits: these indicate the initiators that use this
+ * interface to interact with the hwmod.  Used to add sleep dependencies
+ * when the module is enabled or disabled.
+ */
+#define OCP_USER_MPU                    (1 << 0)
+#define OCP_USER_SDMA                   (1 << 1)
+
+/* omap_hwmod_ocp_if.flags bits */
+#define OCPIF_SWSUP_IDLE                (1 << 0)
+#define OCPIF_CAN_BURST                 (1 << 1)
+
+/**
+ * struct omap_hwmod_ocp_if - OCP interface data
+ * @master: struct omap_hwmod that initiates OCP transactions on this link
+ * @slave: struct omap_hwmod that responds to OCP transactions on this link
+ * @addr: address space associated with this link
+ * @clk: interface clock: OMAP clock name
+ * @_clk: pointer to the interface struct clk (filled in at runtime)
+ * @fw: interface firewall data
+ * @width: OCP data width
+ * @user: initiators using this interface (see OCP_USER_* macros above)
+ * @flags: OCP interface flags (see OCPIF_* macros above)
+ *
+ * It may also be useful to add a tag_cnt field for OCP2.x devices.
+ *
+ * Parameter names beginning with an underscore are managed internally by
+ * the omap_hwmod code and should not be set during initialization.
+ */
+struct omap_hwmod_ocp_if {
+        struct omap_hwmod               *master;
+        struct omap_hwmod               *slave;
+        struct omap_hwmod_addr_space    *addr;
+        const char                      *clk;
+        struct clk                      *_clk;
+        union {
+                struct omap_hwmod_omap2_firewall omap2;
+        }                               fw;
+        u8                              width;
+        u8                              user;
+        u8                              flags;
+};
+
+
+/* Macros for use in struct omap_hwmod_sysconfig */
+
+/* Flags for use in omap_hwmod_sysconfig.idlemodes */
+#define MASTER_STANDBY_SHIFT    4
+#define SLAVE_IDLE_SHIFT        0
+#define SIDLE_FORCE             (HWMOD_IDLEMODE_FORCE << SLAVE_IDLE_SHIFT)
+#define SIDLE_NO                (HWMOD_IDLEMODE_NO << SLAVE_IDLE_SHIFT)
+#define SIDLE_SMART             (HWMOD_IDLEMODE_SMART << SLAVE_IDLE_SHIFT)
+#define SIDLE_SMART_WKUP        (HWMOD_IDLEMODE_SMART_WKUP << SLAVE_IDLE_SHIFT)
+#define MSTANDBY_FORCE          (HWMOD_IDLEMODE_FORCE << MASTER_STANDBY_SHIFT)
+#define MSTANDBY_NO             (HWMOD_IDLEMODE_NO << MASTER_STANDBY_SHIFT)
+#define MSTANDBY_SMART          (HWMOD_IDLEMODE_SMART << MASTER_STANDBY_SHIFT)
+#define MSTANDBY_SMART_WKUP     (HWMOD_IDLEMODE_SMART_WKUP << MASTER_STANDBY_SHIFT)
+
+/* omap_hwmod_sysconfig.sysc_flags capability flags */
+#define SYSC_HAS_AUTOIDLE       (1 << 0)
+#define SYSC_HAS_SOFTRESET      (1 << 1)
+#define SYSC_HAS_ENAWAKEUP      (1 << 2)
+#define SYSC_HAS_EMUFREE        (1 << 3)
+#define SYSC_HAS_CLOCKACTIVITY  (1 << 4)
+#define SYSC_HAS_SIDLEMODE      (1 << 5)
+#define SYSC_HAS_MIDLEMODE      (1 << 6)
+#define SYSS_HAS_RESET_STATUS   (1 << 7)
+#define SYSC_NO_CACHE           (1 << 8)  /* XXX SW flag, belongs elsewhere */
+#define SYSC_HAS_RESET_STATUS   (1 << 9)
+
+/* omap_hwmod_sysconfig.clockact flags */
+#define CLOCKACT_TEST_BOTH      0x0
+#define CLOCKACT_TEST_MAIN      0x1
+#define CLOCKACT_TEST_ICLK      0x2
+#define CLOCKACT_TEST_NONE      0x3
+
+/**
+ * struct omap_hwmod_sysc_fields - hwmod OCP_SYSCONFIG register field offsets.
+ * @midle_shift: Offset of the midle bit
+ * @clkact_shift: Offset of the clockactivity bit
+ * @sidle_shift: Offset of the sidle bit
+ * @enwkup_shift: Offset of the enawakeup bit
+ * @srst_shift: Offset of the softreset bit
+ * @autoidle_shift: Offset of the autoidle bit
+ */
+struct omap_hwmod_sysc_fields {
+        u8 midle_shift;
+        u8 clkact_shift;
+        u8 sidle_shift;
+        u8 enwkup_shift;
+        u8 srst_shift;
+        u8 autoidle_shift;
+};
+
+/**
+ * struct omap_hwmod_class_sysconfig - hwmod class OCP_SYS* data
+ * @rev_offs: IP block revision register offset (from module base addr)
+ * @sysc_offs: OCP_SYSCONFIG register offset (from module base addr)
+ * @syss_offs: OCP_SYSSTATUS register offset (from module base addr)
+ * @idlemodes: One or more of {SIDLE,MSTANDBY}_{OFF,FORCE,SMART}
+ * @sysc_flags: SYS{C,S}_HAS* flags indicating SYSCONFIG bits supported
+ * @clockact: the default value of the module CLOCKACTIVITY bits
+ *
+ * @clockact describes to the module which clocks are likely to be
+ * disabled when the PRCM issues its idle request to the module.  Some
+ * modules have separate clockdomains for the interface clock and main
+ * functional clock, and can check whether they should acknowledge the
+ * idle request based on the internal module functionality that has
+ * been associated with the clocks marked in @clockact.  This field is
+ * only used if HWMOD_SET_DEFAULT_CLOCKACT is set (see below)
+ *
+ * @sysc_fields: structure containing the offset positions of various bits in
+ * SYSCONFIG register. This can be populated using omap_hwmod_sysc_type1 or
+ * omap_hwmod_sysc_type2 defined in omap_hwmod_common_data.c depending on
+ * whether the device ip is compliant with the original PRCM protocol
+ * defined for OMAP2420 or the new PRCM protocol for new OMAP4 IPs.
+ * If the device follows a different scheme for the sysconfig register ,
+ * then this field has to be populated with the correct offset structure.
+ */
+struct omap_hwmod_class_sysconfig {
+        u16 rev_offs;
+        u16 sysc_offs;
+        u16 syss_offs;
+        u16 sysc_flags;
+        u8 idlemodes;
+        u8 clockact;
+        struct omap_hwmod_sysc_fields *sysc_fields;
+};
+
+/**
+ * struct omap_hwmod_omap2_prcm - OMAP2/3-specific PRCM data
+ * @module_offs: PRCM submodule offset from the start of the PRM/CM
+ * @prcm_reg_id: PRCM register ID (e.g., 3 for CM_AUTOIDLE3)
+ * @module_bit: register bit shift for AUTOIDLE, WKST, WKEN, GRPSEL regs
+ * @idlest_reg_id: IDLEST register ID (e.g., 3 for CM_IDLEST3)
+ * @idlest_idle_bit: register bit shift for CM_IDLEST slave idle bit
+ * @idlest_stdby_bit: register bit shift for CM_IDLEST master standby bit
+ *
+ * @prcm_reg_id and @module_bit are specific to the AUTOIDLE, WKST,
+ * WKEN, GRPSEL registers.  In an ideal world, no extra information
+ * would be needed for IDLEST information, but alas, there are some
+ * exceptions, so @idlest_reg_id, @idlest_idle_bit, @idlest_stdby_bit
+ * are needed for the IDLEST registers (c.f. 2430 I2CHS, 3430 USBHOST)
+ */
+struct omap_hwmod_omap2_prcm {
+        s16 module_offs;
+        u8 prcm_reg_id;
+        u8 module_bit;
+        u8 idlest_reg_id;
+        u8 idlest_idle_bit;
+        u8 idlest_stdby_bit;
+};
+
+
+/**
+ * struct omap_hwmod_omap4_prcm - OMAP4-specific PRCM data
+ * @clkctrl_reg: PRCM address of the clock control register
+ * @rstctrl_reg: address of the XXX_RSTCTRL register located in the PRM
+ * @submodule_wkdep_bit: bit shift of the WKDEP range
+ */
+struct omap_hwmod_omap4_prcm {
+        u16             clkctrl_offs;
+        u16             rstctrl_offs;
+        u16             context_offs;
+        u8              submodule_wkdep_bit;
+        u8              modulemode;
+};
+
+
+/*
+ * omap_hwmod.flags definitions
+ *
+ * HWMOD_SWSUP_SIDLE: omap_hwmod code should manually bring module in and out
+ *     of idle, rather than relying on module smart-idle
+ * HWMOD_SWSUP_MSTDBY: omap_hwmod code should manually bring module in and out
+ *     of standby, rather than relying on module smart-standby
+ * HWMOD_INIT_NO_RESET: don't reset this module at boot - important for
+ *     SDRAM controller, etc. XXX probably belongs outside the main hwmod file
+ *     XXX Should be HWMOD_SETUP_NO_RESET
+ * HWMOD_INIT_NO_IDLE: don't idle this module at boot - important for SDRAM
+ *     controller, etc. XXX probably belongs outside the main hwmod file
+ *     XXX Should be HWMOD_SETUP_NO_IDLE
+ * HWMOD_NO_OCP_AUTOIDLE: disable module autoidle (OCP_SYSCONFIG.AUTOIDLE)
+ *     when module is enabled, rather than the default, which is to
+ *     enable autoidle
+ * HWMOD_SET_DEFAULT_CLOCKACT: program CLOCKACTIVITY bits at startup
+ * HWMOD_NO_IDLEST: this module does not have idle status - this is the case
+ *     only for few initiator modules on OMAP2 & 3.
+ * HWMOD_CONTROL_OPT_CLKS_IN_RESET: Enable all optional clocks during reset.
+ *     This is needed for devices like DSS that require optional clocks enabled
+ *     in order to complete the reset. Optional clocks will be disabled
+ *     again after the reset.
+ * HWMOD_16BIT_REG: Module has 16bit registers
+ */
+#define HWMOD_SWSUP_SIDLE                       (1 << 0)
+#define HWMOD_SWSUP_MSTANDBY                    (1 << 1)
+#define HWMOD_INIT_NO_RESET                     (1 << 2)
+#define HWMOD_INIT_NO_IDLE                      (1 << 3)
+#define HWMOD_NO_OCP_AUTOIDLE                   (1 << 4)
+#define HWMOD_SET_DEFAULT_CLOCKACT              (1 << 5)
+#define HWMOD_NO_IDLEST                         (1 << 6)
+#define HWMOD_CONTROL_OPT_CLKS_IN_RESET         (1 << 7)
+#define HWMOD_16BIT_REG                         (1 << 8)
+
+/*
+ * omap_hwmod._int_flags definitions
+ * These are for internal use only and are managed by the omap_hwmod code.
+ *
+ * _HWMOD_NO_MPU_PORT: no path exists for the MPU to write to this module
+ * _HWMOD_WAKEUP_ENABLED: set when the omap_hwmod code has enabled ENAWAKEUP
+ * _HWMOD_SYSCONFIG_LOADED: set when the OCP_SYSCONFIG value has been cached
+ */
+#define _HWMOD_NO_MPU_PORT                      (1 << 0)
+#define _HWMOD_WAKEUP_ENABLED                   (1 << 1)
+#define _HWMOD_SYSCONFIG_LOADED                 (1 << 2)
+
+/*
+ * omap_hwmod._state definitions
+ *
+ * INITIALIZED: reset (optionally), initialized, enabled, disabled
+ *              (optionally)
+ *
+ *
+ */
+#define _HWMOD_STATE_UNKNOWN                    0
+#define _HWMOD_STATE_REGISTERED                 1
+#define _HWMOD_STATE_CLKS_INITED                2
+#define _HWMOD_STATE_INITIALIZED                3
+#define _HWMOD_STATE_ENABLED                    4
+#define _HWMOD_STATE_IDLE                       5
+#define _HWMOD_STATE_DISABLED                   6
+
+/**
+ * struct omap_hwmod_class - the type of an IP block
+ * @name: name of the hwmod_class
+ * @sysc: device SYSCONFIG/SYSSTATUS register data
+ * @rev: revision of the IP class
+ * @pre_shutdown: ptr to fn to be executed immediately prior to device shutdown
+ * @reset: ptr to fn to be executed in place of the standard hwmod reset fn
+ *
+ * Represent the class of a OMAP hardware "modules" (e.g. timer,
+ * smartreflex, gpio, uart...)
+ *
+ * @pre_shutdown is a function that will be run immediately before
+ * hwmod clocks are disabled, etc.  It is intended for use for hwmods
+ * like the MPU watchdog, which cannot be disabled with the standard
+ * omap_hwmod_shutdown().  The function should return 0 upon success,
+ * or some negative error upon failure.  Returning an error will cause
+ * omap_hwmod_shutdown() to abort the device shutdown and return an
+ * error.
+ *
+ * If @reset is defined, then the function it points to will be
+ * executed in place of the standard hwmod _reset() code in
+ * mach-omap2/omap_hwmod.c.  This is needed for IP blocks which have
+ * unusual reset sequences - usually processor IP blocks like the IVA.
+ */
+struct omap_hwmod_class {
+        const char                              *name;
+        struct omap_hwmod_class_sysconfig       *sysc;
+        u32                                     rev;
+        int                                     (*pre_shutdown)(struct omap_hwmod *oh);
+        int                                     (*reset)(struct omap_hwmod *oh);
+};
+
+/**
+ * struct omap_hwmod - integration data for OMAP hardware "modules" (IP blocks)
+ * @name: name of the hwmod
+ * @class: struct omap_hwmod_class * to the class of this hwmod
+ * @od: struct omap_device currently associated with this hwmod (internal use)
+ * @mpu_irqs: ptr to an array of MPU IRQs
+ * @sdma_reqs: ptr to an array of System DMA request IDs
+ * @prcm: PRCM data pertaining to this hwmod
+ * @main_clk: main clock: OMAP clock name
+ * @_clk: pointer to the main struct clk (filled in at runtime)
+ * @opt_clks: other device clocks that drivers can request (0..*)
+ * @vdd_name: voltage domain name
+ * @voltdm: pointer to voltage domain (filled in at runtime)
+ * @masters: ptr to array of OCP ifs that this hwmod can initiate on
+ * @slaves: ptr to array of OCP ifs that this hwmod can respond on
+ * @dev_attr: arbitrary device attributes that can be passed to the driver
+ * @_sysc_cache: internal-use hwmod flags
+ * @_mpu_rt_va: cached register target start address (internal use)
+ * @_mpu_port_index: cached MPU register target slave ID (internal use)
+ * @opt_clks_cnt: number of @opt_clks
+ * @master_cnt: number of @master entries
+ * @slaves_cnt: number of @slave entries
+ * @response_lat: device OCP response latency (in interface clock cycles)
+ * @_int_flags: internal-use hwmod flags
+ * @_state: internal-use hwmod state
+ * @_postsetup_state: internal-use state to leave the hwmod in after _setup()
+ * @flags: hwmod flags (documented below)
+ * @omap_chip: OMAP chips this hwmod is present on
+ * @_lock: spinlock serializing operations on this hwmod
+ * @node: list node for hwmod list (internal use)
+ *
+ * @main_clk refers to this module's "main clock," which for our
+ * purposes is defined as "the functional clock needed for register
+ * accesses to complete."  Modules may not have a main clock if the
+ * interface clock also serves as a main clock.
+ *
+ * Parameter names beginning with an underscore are managed internally by
+ * the omap_hwmod code and should not be set during initialization.
+ */
+struct omap_hwmod {
+        const char                      *name;
+        struct omap_hwmod_class         *class;
+        struct omap_device              *od;
+        struct omap_hwmod_mux_info      *mux;
+        struct omap_hwmod_irq_info      *mpu_irqs;
+        struct omap_hwmod_dma_info      *sdma_reqs;
+        struct omap_hwmod_rst_info      *rst_lines;
+        union {
+                struct omap_hwmod_omap2_prcm omap2;
+                struct omap_hwmod_omap4_prcm omap4;
+        }                               prcm;
+        const char                      *main_clk;
+        struct clk                      *_clk;
+        struct omap_hwmod_opt_clk       *opt_clks;
+        char                            *clkdm_name;
+        struct clockdomain              *clkdm;
+        char                            *vdd_name;
+        struct voltagedomain            *voltdm;
+        struct omap_hwmod_ocp_if        **masters; /* connect to *_IA */
+        struct omap_hwmod_ocp_if        **slaves;  /* connect to *_TA */
+        void                            *dev_attr;
+        u32                             _sysc_cache;
+        void __iomem                    *_mpu_rt_va;
+        spinlock_t                      _lock;
+        struct list_head                node;
+        u16                             flags;
+        u8                              _mpu_port_index;
+        u8                              response_lat;
+        u8                              rst_lines_cnt;
+        u8                              opt_clks_cnt;
+        u8                              masters_cnt;
+        u8                              slaves_cnt;
+        u8                              hwmods_cnt;
+        u8                              _int_flags;
+        u8                              _state;
+        u8                              _postsetup_state;
+        const struct omap_chip_id       omap_chip;
+};
+
+int omap_hwmod_register(struct omap_hwmod **ohs);
+struct omap_hwmod *omap_hwmod_lookup(const char *name);
+int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh, void *data),
+                        void *data);
+
+int __init omap_hwmod_setup_one(const char *name);
+
+int omap_hwmod_enable(struct omap_hwmod *oh);
+int _omap_hwmod_enable(struct omap_hwmod *oh);
+int omap_hwmod_idle(struct omap_hwmod *oh);
+int _omap_hwmod_idle(struct omap_hwmod *oh);
+int omap_hwmod_shutdown(struct omap_hwmod *oh);
+
+int omap_hwmod_assert_hardreset(struct omap_hwmod *oh, const char *name);
+int omap_hwmod_deassert_hardreset(struct omap_hwmod *oh, const char *name);
+int omap_hwmod_read_hardreset(struct omap_hwmod *oh, const char *name);
+
+int omap_hwmod_enable_clocks(struct omap_hwmod *oh);
+int omap_hwmod_disable_clocks(struct omap_hwmod *oh);
+
+int omap_hwmod_set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode);
+int omap_hwmod_set_ocp_autoidle(struct omap_hwmod *oh, u8 autoidle);
+
+int omap_hwmod_reset(struct omap_hwmod *oh);
+void omap_hwmod_ocp_barrier(struct omap_hwmod *oh);
+
+void omap_hwmod_write(u32 v, struct omap_hwmod *oh, u16 reg_offs);
+u32 omap_hwmod_read(struct omap_hwmod *oh, u16 reg_offs);
+int omap_hwmod_softreset(struct omap_hwmod *oh);
+
+int omap_hwmod_count_resources(struct omap_hwmod *oh);
+int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res);
+
+struct powerdomain *omap_hwmod_get_pwrdm(struct omap_hwmod *oh);
+void __iomem *omap_hwmod_get_mpu_rt_va(struct omap_hwmod *oh);
+
+int omap_hwmod_add_initiator_dep(struct omap_hwmod *oh,
+                                 struct omap_hwmod *init_oh);
+int omap_hwmod_del_initiator_dep(struct omap_hwmod *oh,
+                                 struct omap_hwmod *init_oh);
+
+int omap_hwmod_set_clockact_both(struct omap_hwmod *oh);
+int omap_hwmod_set_clockact_main(struct omap_hwmod *oh);
+int omap_hwmod_set_clockact_iclk(struct omap_hwmod *oh);
+int omap_hwmod_set_clockact_none(struct omap_hwmod *oh);
+
+int omap_hwmod_enable_wakeup(struct omap_hwmod *oh);
+int omap_hwmod_disable_wakeup(struct omap_hwmod *oh);
+
+int omap_hwmod_for_each_by_class(const char *classname,
+                                 int (*fn)(struct omap_hwmod *oh,
+                                           void *user),
+                                 void *user);
+
+int omap_hwmod_set_postsetup_state(struct omap_hwmod *oh, u8 state);
+u32 omap_hwmod_get_context_loss_count(struct omap_hwmod *oh);
+
+int omap_hwmod_no_setup_reset(struct omap_hwmod *oh);
+
+/*
+ * Chip variant-specific hwmod init routines - XXX should be converted
+ * to use initcalls once the initial boot ordering is straightened out
+ */
+extern int omap2420_hwmod_init(void);
+extern int omap2430_hwmod_init(void);
+extern int omap3xxx_hwmod_init(void);
+extern int omap44xx_hwmod_init(void);
+
+#endif