1  // SPDX-License-Identifier: GPL-2.0
2  /*
3   * OMAP2/3 clockdomain common data
4   *
5   * Copyright (C) 2008-2011 Texas Instruments, Inc.
6   * Copyright (C) 2008-2010 Nokia Corporation
7   *
8   * Paul Walmsley, Jouni Högander
9   *
10   * This file contains clockdomains and clockdomain wakeup/sleep
11   * dependencies for the OMAP2/3 chips.  Some notes:
12   *
13   * A useful validation rule for struct clockdomain: Any clockdomain
14   * referenced by a wkdep_srcs or sleepdep_srcs array must have a
15   * dep_bit assigned.  So wkdep_srcs/sleepdep_srcs are really just
16   * software-controllable dependencies.  Non-software-controllable
17   * dependencies do exist, but they are not encoded below (yet).
18   *
19   * 24xx does not support programmable sleep dependencies (SLEEPDEP)
20   *
21   * The overly-specific dep_bit names are due to a bit name collision
22   * with CM_FCLKEN_{DSP,IVA2}.  The DSP/IVA2 PM_WKDEP and CM_SLEEPDEP shift
23   * value are the same for all powerdomains: 2
24   *
25   * XXX should dep_bit be a mask, so we can test to see if it is 0 as a
26   * sanity check?
27   * XXX encode hardware fixed wakeup dependencies -- esp. for 3430 CORE
28   */
29  
30  /*
31   * To-Do List
32   * -> Port the Sleep/Wakeup dependencies for the domains
33   *    from the Power domain framework
34   */
35  
36  #include <linux/kernel.h>
37  #include <linux/io.h>
38  
39  #include "clockdomain.h"
40  #include "prm2xxx_3xxx.h"
41  #include "cm2xxx_3xxx.h"
42  #include "cm-regbits-24xx.h"
43  #include "cm-regbits-34xx.h"
44  #include "cm-regbits-44xx.h"
45  #include "prm-regbits-24xx.h"
46  #include "prm-regbits-34xx.h"
47  
48  /*
49   * Clockdomain dependencies for wkdeps/sleepdeps
50   *
51   * XXX Hardware dependencies (e.g., dependencies that cannot be
52   * changed in software) are not included here yet, but should be.
53   */
54  
55  /* Wakeup dependency source arrays */
56  
57  /* 2xxx-specific possible dependencies */
58  
59  /* 2xxx PM_WKDEP_GFX: CORE, MPU, WKUP */
60  struct clkdm_dep gfx_24xx_wkdeps[] = {
61  	{ .clkdm_name = "core_l3_clkdm" },
62  	{ .clkdm_name = "core_l4_clkdm" },
63  	{ .clkdm_name = "mpu_clkdm" },
64  	{ .clkdm_name = "wkup_clkdm" },
65  	{ NULL },
66  };
67  
68  /* 2xxx PM_WKDEP_DSP: CORE, MPU, WKUP */
69  struct clkdm_dep dsp_24xx_wkdeps[] = {
70  	{ .clkdm_name = "core_l3_clkdm" },
71  	{ .clkdm_name = "core_l4_clkdm" },
72  	{ .clkdm_name = "mpu_clkdm" },
73  	{ .clkdm_name = "wkup_clkdm" },
74  	{ NULL },
75  };
76  
77  
78  /*
79   * OMAP2/3-common clockdomains
80   *
81   * Even though the 2420 has a single PRCM module from the
82   * interconnect's perspective, internally it does appear to have
83   * separate PRM and CM clockdomains.  The usual test case is
84   * sys_clkout/sys_clkout2.
85   */
86  
87  /* This is an implicit clockdomain - it is never defined as such in TRM */
88  struct clockdomain wkup_common_clkdm = {
89  	.name		= "wkup_clkdm",
90  	.pwrdm		= { .name = "wkup_pwrdm" },
91  	.dep_bit	= OMAP_EN_WKUP_SHIFT,
92  	.flags		= CLKDM_ACTIVE_WITH_MPU,
93  };
94