1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * OMAP2xxx clockdomains |
4 | * |
5 | * Copyright (C) 2008-2009 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 dependencies |
11 | * for OMAP2xxx chips. Some notes: |
12 | * |
13 | * A useful validation rule for struct clockdomain: Any clockdomain |
14 | * referenced by a wkdep_srcs must have a dep_bit assigned. So |
15 | * wkdep_srcs are really just software-controllable dependencies. |
16 | * Non-software-controllable dependencies do exist, but they are not |
17 | * 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 "soc.h" |
40 | #include "clockdomain.h" |
41 | #include "prm2xxx_3xxx.h" |
42 | #include "cm2xxx_3xxx.h" |
43 | #include "cm-regbits-24xx.h" |
44 | #include "prm-regbits-24xx.h" |
45 | |
46 | /* |
47 | * Clockdomain dependencies for wkdeps |
48 | * |
49 | * XXX Hardware dependencies (e.g., dependencies that cannot be |
50 | * changed in software) are not included here yet, but should be. |
51 | */ |
52 | |
53 | /* Wakeup dependency source arrays */ |
54 | |
55 | /* 2430-specific possible wakeup dependencies */ |
56 | |
57 | /* 2430 PM_WKDEP_CORE: DSP, GFX, MPU, WKUP, MDM */ |
58 | static struct clkdm_dep core_2430_wkdeps[] = { |
59 | { .clkdm_name = "dsp_clkdm" }, |
60 | { .clkdm_name = "gfx_clkdm" }, |
61 | { .clkdm_name = "mpu_clkdm" }, |
62 | { .clkdm_name = "wkup_clkdm" }, |
63 | { .clkdm_name = "mdm_clkdm" }, |
64 | { NULL }, |
65 | }; |
66 | |
67 | /* 2430 PM_WKDEP_MPU: CORE, DSP, WKUP, MDM */ |
68 | static struct clkdm_dep mpu_2430_wkdeps[] = { |
69 | { .clkdm_name = "core_l3_clkdm" }, |
70 | { .clkdm_name = "core_l4_clkdm" }, |
71 | { .clkdm_name = "dsp_clkdm" }, |
72 | { .clkdm_name = "wkup_clkdm" }, |
73 | { .clkdm_name = "mdm_clkdm" }, |
74 | { NULL }, |
75 | }; |
76 | |
77 | /* 2430 PM_WKDEP_MDM: CORE, MPU, WKUP */ |
78 | static struct clkdm_dep mdm_2430_wkdeps[] = { |
79 | { .clkdm_name = "core_l3_clkdm" }, |
80 | { .clkdm_name = "core_l4_clkdm" }, |
81 | { .clkdm_name = "mpu_clkdm" }, |
82 | { .clkdm_name = "wkup_clkdm" }, |
83 | { NULL }, |
84 | }; |
85 | |
86 | /* |
87 | * 2430-only clockdomains |
88 | */ |
89 | |
90 | static struct clockdomain mpu_2430_clkdm = { |
91 | .name = "mpu_clkdm" , |
92 | .pwrdm = { .name = "mpu_pwrdm" }, |
93 | .flags = CLKDM_CAN_HWSUP_SWSUP, |
94 | .wkdep_srcs = mpu_2430_wkdeps, |
95 | .clktrctrl_mask = OMAP24XX_AUTOSTATE_MPU_MASK, |
96 | }; |
97 | |
98 | /* Another case of bit name collisions between several registers: EN_MDM */ |
99 | static struct clockdomain mdm_clkdm = { |
100 | .name = "mdm_clkdm" , |
101 | .pwrdm = { .name = "mdm_pwrdm" }, |
102 | .flags = CLKDM_CAN_HWSUP_SWSUP, |
103 | .dep_bit = OMAP2430_PM_WKDEP_MPU_EN_MDM_SHIFT, |
104 | .wkdep_srcs = mdm_2430_wkdeps, |
105 | .clktrctrl_mask = OMAP2430_AUTOSTATE_MDM_MASK, |
106 | }; |
107 | |
108 | static struct clockdomain dsp_2430_clkdm = { |
109 | .name = "dsp_clkdm" , |
110 | .pwrdm = { .name = "dsp_pwrdm" }, |
111 | .flags = CLKDM_CAN_HWSUP_SWSUP, |
112 | .dep_bit = OMAP24XX_PM_WKDEP_MPU_EN_DSP_SHIFT, |
113 | .wkdep_srcs = dsp_24xx_wkdeps, |
114 | .clktrctrl_mask = OMAP24XX_AUTOSTATE_DSP_MASK, |
115 | }; |
116 | |
117 | static struct clockdomain gfx_2430_clkdm = { |
118 | .name = "gfx_clkdm" , |
119 | .pwrdm = { .name = "gfx_pwrdm" }, |
120 | .flags = CLKDM_CAN_HWSUP_SWSUP, |
121 | .wkdep_srcs = gfx_24xx_wkdeps, |
122 | .clktrctrl_mask = OMAP24XX_AUTOSTATE_GFX_MASK, |
123 | }; |
124 | |
125 | /* |
126 | * XXX add usecounting for clkdm dependencies, otherwise the presence |
127 | * of a single dep bit for core_l3_24xx_clkdm and core_l4_24xx_clkdm |
128 | * could cause trouble |
129 | */ |
130 | static struct clockdomain core_l3_2430_clkdm = { |
131 | .name = "core_l3_clkdm" , |
132 | .pwrdm = { .name = "core_pwrdm" }, |
133 | .flags = CLKDM_CAN_HWSUP, |
134 | .dep_bit = OMAP24XX_EN_CORE_SHIFT, |
135 | .wkdep_srcs = core_2430_wkdeps, |
136 | .clktrctrl_mask = OMAP24XX_AUTOSTATE_L3_MASK, |
137 | }; |
138 | |
139 | /* |
140 | * XXX add usecounting for clkdm dependencies, otherwise the presence |
141 | * of a single dep bit for core_l3_24xx_clkdm and core_l4_24xx_clkdm |
142 | * could cause trouble |
143 | */ |
144 | static struct clockdomain core_l4_2430_clkdm = { |
145 | .name = "core_l4_clkdm" , |
146 | .pwrdm = { .name = "core_pwrdm" }, |
147 | .flags = CLKDM_CAN_HWSUP, |
148 | .dep_bit = OMAP24XX_EN_CORE_SHIFT, |
149 | .wkdep_srcs = core_2430_wkdeps, |
150 | .clktrctrl_mask = OMAP24XX_AUTOSTATE_L4_MASK, |
151 | }; |
152 | |
153 | static struct clockdomain dss_2430_clkdm = { |
154 | .name = "dss_clkdm" , |
155 | .pwrdm = { .name = "core_pwrdm" }, |
156 | .flags = CLKDM_CAN_HWSUP, |
157 | .clktrctrl_mask = OMAP24XX_AUTOSTATE_DSS_MASK, |
158 | }; |
159 | |
160 | static struct clockdomain *clockdomains_omap243x[] __initdata = { |
161 | &wkup_common_clkdm, |
162 | &mpu_2430_clkdm, |
163 | &mdm_clkdm, |
164 | &dsp_2430_clkdm, |
165 | &gfx_2430_clkdm, |
166 | &core_l3_2430_clkdm, |
167 | &core_l4_2430_clkdm, |
168 | &dss_2430_clkdm, |
169 | NULL, |
170 | }; |
171 | |
172 | void __init omap243x_clockdomains_init(void) |
173 | { |
174 | if (!cpu_is_omap243x()) |
175 | return; |
176 | |
177 | clkdm_register_platform_funcs(co: &omap2_clkdm_operations); |
178 | clkdm_register_clkdms(c: clockdomains_omap243x); |
179 | clkdm_complete_init(); |
180 | } |
181 | |
182 | |