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