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1 | /* |
2 | * OMAP2xxx clockdomains | |
3 | * | |
4 | * Copyright (C) 2008-2009 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 OMAP2xxx 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 | /* 2430-specific possible wakeup dependencies */ | |
54 | ||
55 | /* 2430 PM_WKDEP_CORE: DSP, GFX, MPU, WKUP, MDM */ | |
56 | static struct clkdm_dep core_2430_wkdeps[] = { | |
57 | { .clkdm_name = "dsp_clkdm" }, | |
58 | { .clkdm_name = "gfx_clkdm" }, | |
59 | { .clkdm_name = "mpu_clkdm" }, | |
60 | { .clkdm_name = "wkup_clkdm" }, | |
61 | { .clkdm_name = "mdm_clkdm" }, | |
62 | { NULL }, | |
63 | }; | |
64 | ||
65 | /* 2430 PM_WKDEP_MPU: CORE, DSP, WKUP, MDM */ | |
66 | static struct clkdm_dep mpu_2430_wkdeps[] = { | |
67 | { .clkdm_name = "core_l3_clkdm" }, | |
68 | { .clkdm_name = "core_l4_clkdm" }, | |
69 | { .clkdm_name = "dsp_clkdm" }, | |
70 | { .clkdm_name = "wkup_clkdm" }, | |
71 | { .clkdm_name = "mdm_clkdm" }, | |
72 | { NULL }, | |
73 | }; | |
74 | ||
75 | /* 2430 PM_WKDEP_MDM: CORE, MPU, WKUP */ | |
76 | static struct clkdm_dep mdm_2430_wkdeps[] = { | |
77 | { .clkdm_name = "core_l3_clkdm" }, | |
78 | { .clkdm_name = "core_l4_clkdm" }, | |
79 | { .clkdm_name = "mpu_clkdm" }, | |
80 | { .clkdm_name = "wkup_clkdm" }, | |
81 | { NULL }, | |
82 | }; | |
83 | ||
84 | /* | |
85 | * 2430-only clockdomains | |
86 | */ | |
87 | ||
88 | static struct clockdomain mpu_2430_clkdm = { | |
89 | .name = "mpu_clkdm", | |
90 | .pwrdm = { .name = "mpu_pwrdm" }, | |
91 | .flags = CLKDM_CAN_HWSUP_SWSUP, | |
92 | .wkdep_srcs = mpu_2430_wkdeps, | |
93 | .clktrctrl_mask = OMAP24XX_AUTOSTATE_MPU_MASK, | |
94 | }; | |
95 | ||
96 | /* Another case of bit name collisions between several registers: EN_MDM */ | |
97 | static struct clockdomain mdm_clkdm = { | |
98 | .name = "mdm_clkdm", | |
99 | .pwrdm = { .name = "mdm_pwrdm" }, | |
100 | .flags = CLKDM_CAN_HWSUP_SWSUP, | |
101 | .dep_bit = OMAP2430_PM_WKDEP_MPU_EN_MDM_SHIFT, | |
102 | .wkdep_srcs = mdm_2430_wkdeps, | |
103 | .clktrctrl_mask = OMAP2430_AUTOSTATE_MDM_MASK, | |
104 | }; | |
105 | ||
106 | static struct clockdomain dsp_2430_clkdm = { | |
107 | .name = "dsp_clkdm", | |
108 | .pwrdm = { .name = "dsp_pwrdm" }, | |
109 | .flags = CLKDM_CAN_HWSUP_SWSUP, | |
110 | .dep_bit = OMAP24XX_PM_WKDEP_MPU_EN_DSP_SHIFT, | |
111 | .wkdep_srcs = dsp_24xx_wkdeps, | |
112 | .clktrctrl_mask = OMAP24XX_AUTOSTATE_DSP_MASK, | |
113 | }; | |
114 | ||
115 | static struct clockdomain gfx_2430_clkdm = { | |
116 | .name = "gfx_clkdm", | |
117 | .pwrdm = { .name = "gfx_pwrdm" }, | |
118 | .flags = CLKDM_CAN_HWSUP_SWSUP, | |
119 | .wkdep_srcs = gfx_24xx_wkdeps, | |
120 | .clktrctrl_mask = OMAP24XX_AUTOSTATE_GFX_MASK, | |
121 | }; | |
122 | ||
123 | /* | |
124 | * XXX add usecounting for clkdm dependencies, otherwise the presence | |
125 | * of a single dep bit for core_l3_24xx_clkdm and core_l4_24xx_clkdm | |
126 | * could cause trouble | |
127 | */ | |
128 | static struct clockdomain core_l3_2430_clkdm = { | |
129 | .name = "core_l3_clkdm", | |
130 | .pwrdm = { .name = "core_pwrdm" }, | |
131 | .flags = CLKDM_CAN_HWSUP, | |
132 | .dep_bit = OMAP24XX_EN_CORE_SHIFT, | |
133 | .wkdep_srcs = core_2430_wkdeps, | |
134 | .clktrctrl_mask = OMAP24XX_AUTOSTATE_L3_MASK, | |
135 | }; | |
136 | ||
137 | /* | |
138 | * XXX add usecounting for clkdm dependencies, otherwise the presence | |
139 | * of a single dep bit for core_l3_24xx_clkdm and core_l4_24xx_clkdm | |
140 | * could cause trouble | |
141 | */ | |
142 | static struct clockdomain core_l4_2430_clkdm = { | |
143 | .name = "core_l4_clkdm", | |
144 | .pwrdm = { .name = "core_pwrdm" }, | |
145 | .flags = CLKDM_CAN_HWSUP, | |
146 | .dep_bit = OMAP24XX_EN_CORE_SHIFT, | |
147 | .wkdep_srcs = core_2430_wkdeps, | |
148 | .clktrctrl_mask = OMAP24XX_AUTOSTATE_L4_MASK, | |
149 | }; | |
150 | ||
151 | static struct clockdomain dss_2430_clkdm = { | |
152 | .name = "dss_clkdm", | |
153 | .pwrdm = { .name = "core_pwrdm" }, | |
154 | .flags = CLKDM_CAN_HWSUP, | |
155 | .clktrctrl_mask = OMAP24XX_AUTOSTATE_DSS_MASK, | |
156 | }; | |
157 | ||
158 | static struct clockdomain *clockdomains_omap243x[] __initdata = { | |
159 | &wkup_common_clkdm, | |
a5ffef6a PW |
160 | &mpu_2430_clkdm, |
161 | &mdm_clkdm, | |
162 | &dsp_2430_clkdm, | |
163 | &gfx_2430_clkdm, | |
164 | &core_l3_2430_clkdm, | |
165 | &core_l4_2430_clkdm, | |
166 | &dss_2430_clkdm, | |
167 | NULL, | |
168 | }; | |
169 | ||
170 | void __init omap243x_clockdomains_init(void) | |
171 | { | |
172 | if (!cpu_is_omap243x()) | |
173 | return; | |
174 | ||
175 | clkdm_register_platform_funcs(&omap2_clkdm_operations); | |
176 | clkdm_register_clkdms(clockdomains_omap243x); | |
177 | clkdm_complete_init(); | |
178 | } | |
179 |