arch/arm/mach-omap2/clockdomains2xxx_3xxx_data.c

   1 /*
   2  * OMAP2/3 clockdomain common data
   3  *
   4  * Copyright (C) 2008-2011 Texas Instruments, Inc.
   5  * Copyright (C) 2008-2010 Nokia Corporation
   6  *
   7  * Paul Walmsley, Jouni Högander
   8  *
   9  * This file contains clockdomains and clockdomain wakeup/sleep
  10  * dependencies for the OMAP2/3 chips.  Some notes:
  11  *
  12  * A useful validation rule for struct clockdomain: Any clockdomain
  13  * referenced by a wkdep_srcs or sleepdep_srcs array must have a
  14  * dep_bit assigned.  So wkdep_srcs/sleepdep_srcs are really just
  15  * software-controllable dependencies.  Non-software-controllable
  16  * dependencies do exist, but they are not encoded below (yet).
  17  *
  18  * 24xx does not support programmable sleep dependencies (SLEEPDEP)
  19  *
  20  * The overly-specific dep_bit names are due to a bit name collision
  21  * with CM_FCLKEN_{DSP,IVA2}.  The DSP/IVA2 PM_WKDEP and CM_SLEEPDEP shift
  22  * value are the same for all powerdomains: 2
  23  *
  24  * XXX should dep_bit be a mask, so we can test to see if it is 0 as a
  25  * sanity check?
  26  * XXX encode hardware fixed wakeup dependencies -- esp. for 3430 CORE
  27  */
  28
  29 /*
  30  * To-Do List
  31  * -> Port the Sleep/Wakeup dependencies for the domains
  32  *    from the Power domain framework
  33  */
  34
  35 #include <linux/kernel.h>
  36 #include <linux/io.h>
  37
  38 #include "clockdomain.h"
  39 #include "prm2xxx_3xxx.h"
  40 #include "cm2xxx_3xxx.h"
  41 #include "cm-regbits-24xx.h"
  42 #include "cm-regbits-34xx.h"
  43 #include "cm-regbits-44xx.h"
  44 #include "prm-regbits-24xx.h"
  45 #include "prm-regbits-34xx.h"
  46
  47 /*
  48  * Clockdomain dependencies for wkdeps/sleepdeps
  49  *
  50  * XXX Hardware dependencies (e.g., dependencies that cannot be
  51  * changed in software) are not included here yet, but should be.
  52  */
  53
  54 /* Wakeup dependency source arrays */
  55
  56 /* 2xxx-specific possible dependencies */
  57
  58 /* 2xxx PM_WKDEP_GFX: CORE, MPU, WKUP */
  59 struct clkdm_dep gfx_24xx_wkdeps[] = {
  60         { .clkdm_name = "core_l3_clkdm" },
  61         { .clkdm_name = "core_l4_clkdm" },
  62         { .clkdm_name = "mpu_clkdm" },
  63         { .clkdm_name = "wkup_clkdm" },
  64         { NULL },
  65 };
  66
  67 /* 2xxx PM_WKDEP_DSP: CORE, MPU, WKUP */
  68 struct clkdm_dep dsp_24xx_wkdeps[] = {
  69         { .clkdm_name = "core_l3_clkdm" },
  70         { .clkdm_name = "core_l4_clkdm" },
  71         { .clkdm_name = "mpu_clkdm" },
  72         { .clkdm_name = "wkup_clkdm" },
  73         { NULL },
  74 };
  75
  76
  77 /*
  78  * OMAP2/3-common clockdomains
  79  *
  80  * Even though the 2420 has a single PRCM module from the
  81  * interconnect's perspective, internally it does appear to have
  82  * separate PRM and CM clockdomains.  The usual test case is
  83  * sys_clkout/sys_clkout2.
  84  */
  85
  86 /* This is an implicit clockdomain - it is never defined as such in TRM */
  87 struct clockdomain wkup_common_clkdm = {
  88         .name           = "wkup_clkdm",
  89         .pwrdm          = { .name = "wkup_pwrdm" },
  90         .dep_bit        = OMAP_EN_WKUP_SHIFT,
  91         .flags          = CLKDM_ACTIVE_WITH_MPU,
  92 };