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clockdomains2420_data.c
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1 /*
2  * OMAP2420 clockdomains
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 dependencies
10  * for OMAP2420 chips. Some notes:
11  *
12  * A useful validation rule for struct clockdomain: Any clockdomain
13  * referenced by a wkdep_srcs must have a dep_bit assigned. So
14  * wkdep_srcs are really just software-controllable dependencies.
15  * Non-software-controllable dependencies do exist, but they are not
16  * 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 "prm-regbits-24xx.h"
43 
44 /*
45  * Clockdomain dependencies for wkdeps
46  *
47  * XXX Hardware dependencies (e.g., dependencies that cannot be
48  * changed in software) are not included here yet, but should be.
49  */
50 
51 /* Wakeup dependency source arrays */
52 
53 /* 2420-specific possible wakeup dependencies */
54 
55 /* 2420 PM_WKDEP_MPU: CORE, DSP, WKUP */
56 static struct clkdm_dep mpu_2420_wkdeps[] = {
57  { .clkdm_name = "core_l3_clkdm" },
58  { .clkdm_name = "core_l4_clkdm" },
59  { .clkdm_name = "dsp_clkdm" },
60  { .clkdm_name = "wkup_clkdm" },
61  { NULL },
62 };
63 
64 /* 2420 PM_WKDEP_CORE: DSP, GFX, MPU, WKUP */
65 static struct clkdm_dep core_2420_wkdeps[] = {
66  { .clkdm_name = "dsp_clkdm" },
67  { .clkdm_name = "gfx_clkdm" },
68  { .clkdm_name = "mpu_clkdm" },
69  { .clkdm_name = "wkup_clkdm" },
70  { NULL },
71 };
72 
73 /*
74  * 2420-only clockdomains
75  */
76 
77 static struct clockdomain mpu_2420_clkdm = {
78  .name = "mpu_clkdm",
79  .pwrdm = { .name = "mpu_pwrdm" },
80  .flags = CLKDM_CAN_HWSUP,
81  .wkdep_srcs = mpu_2420_wkdeps,
82  .clktrctrl_mask = OMAP24XX_AUTOSTATE_MPU_MASK,
83 };
84 
85 static struct clockdomain iva1_2420_clkdm = {
86  .name = "iva1_clkdm",
87  .pwrdm = { .name = "dsp_pwrdm" },
88  .flags = CLKDM_CAN_HWSUP_SWSUP,
89  .dep_bit = OMAP24XX_PM_WKDEP_MPU_EN_DSP_SHIFT,
90  .wkdep_srcs = dsp_24xx_wkdeps,
91  .clktrctrl_mask = OMAP2420_AUTOSTATE_IVA_MASK,
92 };
93 
94 static struct clockdomain dsp_2420_clkdm = {
95  .name = "dsp_clkdm",
96  .pwrdm = { .name = "dsp_pwrdm" },
97  .flags = CLKDM_CAN_HWSUP_SWSUP,
98  .clktrctrl_mask = OMAP24XX_AUTOSTATE_DSP_MASK,
99 };
100 
101 static struct clockdomain gfx_2420_clkdm = {
102  .name = "gfx_clkdm",
103  .pwrdm = { .name = "gfx_pwrdm" },
104  .flags = CLKDM_CAN_HWSUP_SWSUP,
105  .wkdep_srcs = gfx_24xx_wkdeps,
106  .clktrctrl_mask = OMAP24XX_AUTOSTATE_GFX_MASK,
107 };
108 
109 static struct clockdomain core_l3_2420_clkdm = {
110  .name = "core_l3_clkdm",
111  .pwrdm = { .name = "core_pwrdm" },
112  .flags = CLKDM_CAN_HWSUP,
113  .wkdep_srcs = core_2420_wkdeps,
114  .clktrctrl_mask = OMAP24XX_AUTOSTATE_L3_MASK,
115 };
116 
117 static struct clockdomain core_l4_2420_clkdm = {
118  .name = "core_l4_clkdm",
119  .pwrdm = { .name = "core_pwrdm" },
120  .flags = CLKDM_CAN_HWSUP,
121  .wkdep_srcs = core_2420_wkdeps,
122  .clktrctrl_mask = OMAP24XX_AUTOSTATE_L4_MASK,
123 };
124 
125 static struct clockdomain dss_2420_clkdm = {
126  .name = "dss_clkdm",
127  .pwrdm = { .name = "core_pwrdm" },
128  .flags = CLKDM_CAN_HWSUP,
129  .clktrctrl_mask = OMAP24XX_AUTOSTATE_DSS_MASK,
130 };
131 
132 static struct clockdomain *clockdomains_omap242x[] __initdata = {
133  &wkup_common_clkdm,
134  &mpu_2420_clkdm,
135  &iva1_2420_clkdm,
136  &dsp_2420_clkdm,
137  &gfx_2420_clkdm,
138  &core_l3_2420_clkdm,
139  &core_l4_2420_clkdm,
140  &dss_2420_clkdm,
141  NULL,
142 };
143 
144 void __init omap242x_clockdomains_init(void)
145 {
146  if (!cpu_is_omap242x())
147  return;
148 
149  clkdm_register_platform_funcs(&omap2_clkdm_operations);
150  clkdm_register_clkdms(clockdomains_omap242x);
151  clkdm_complete_init();
152 }
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