1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * OMAP2420 clockdomains
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 dependencies
11  * for OMAP2420 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 /* 2420-specific possible wakeup dependencies */
56 
57 /* 2420 PM_WKDEP_MPU: CORE, DSP, WKUP */
58 static struct clkdm_dep mpu_2420_wkdeps[] = {
59 	{ .clkdm_name = "core_l3_clkdm" },
60 	{ .clkdm_name = "core_l4_clkdm" },
61 	{ .clkdm_name = "dsp_clkdm" },
62 	{ .clkdm_name = "wkup_clkdm" },
63 	{ NULL },
64 };
65 
66 /* 2420 PM_WKDEP_CORE: DSP, GFX, MPU, WKUP */
67 static struct clkdm_dep core_2420_wkdeps[] = {
68 	{ .clkdm_name = "dsp_clkdm" },
69 	{ .clkdm_name = "gfx_clkdm" },
70 	{ .clkdm_name = "mpu_clkdm" },
71 	{ .clkdm_name = "wkup_clkdm" },
72 	{ NULL },
73 };
74 
75 /*
76  * 2420-only clockdomains
77  */
78 
79 static struct clockdomain mpu_2420_clkdm = {
80 	.name		= "mpu_clkdm",
81 	.pwrdm		= { .name = "mpu_pwrdm" },
82 	.flags		= CLKDM_CAN_HWSUP,
83 	.wkdep_srcs	= mpu_2420_wkdeps,
84 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_MPU_MASK,
85 };
86 
87 static struct clockdomain iva1_2420_clkdm = {
88 	.name		= "iva1_clkdm",
89 	.pwrdm		= { .name = "dsp_pwrdm" },
90 	.flags		= CLKDM_CAN_HWSUP_SWSUP,
91 	.dep_bit	= OMAP24XX_PM_WKDEP_MPU_EN_DSP_SHIFT,
92 	.wkdep_srcs	= dsp_24xx_wkdeps,
93 	.clktrctrl_mask = OMAP2420_AUTOSTATE_IVA_MASK,
94 };
95 
96 static struct clockdomain dsp_2420_clkdm = {
97 	.name		= "dsp_clkdm",
98 	.pwrdm		= { .name = "dsp_pwrdm" },
99 	.flags		= CLKDM_CAN_HWSUP_SWSUP,
100 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_DSP_MASK,
101 };
102 
103 static struct clockdomain gfx_2420_clkdm = {
104 	.name		= "gfx_clkdm",
105 	.pwrdm		= { .name = "gfx_pwrdm" },
106 	.flags		= CLKDM_CAN_HWSUP_SWSUP,
107 	.wkdep_srcs	= gfx_24xx_wkdeps,
108 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_GFX_MASK,
109 };
110 
111 static struct clockdomain core_l3_2420_clkdm = {
112 	.name		= "core_l3_clkdm",
113 	.pwrdm		= { .name = "core_pwrdm" },
114 	.flags		= CLKDM_CAN_HWSUP,
115 	.wkdep_srcs	= core_2420_wkdeps,
116 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_L3_MASK,
117 };
118 
119 static struct clockdomain core_l4_2420_clkdm = {
120 	.name		= "core_l4_clkdm",
121 	.pwrdm		= { .name = "core_pwrdm" },
122 	.flags		= CLKDM_CAN_HWSUP,
123 	.wkdep_srcs	= core_2420_wkdeps,
124 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_L4_MASK,
125 };
126 
127 static struct clockdomain dss_2420_clkdm = {
128 	.name		= "dss_clkdm",
129 	.pwrdm		= { .name = "core_pwrdm" },
130 	.flags		= CLKDM_CAN_HWSUP,
131 	.clktrctrl_mask = OMAP24XX_AUTOSTATE_DSS_MASK,
132 };
133 
134 static struct clockdomain *clockdomains_omap242x[] __initdata = {
135 	&wkup_common_clkdm,
136 	&mpu_2420_clkdm,
137 	&iva1_2420_clkdm,
138 	&dsp_2420_clkdm,
139 	&gfx_2420_clkdm,
140 	&core_l3_2420_clkdm,
141 	&core_l4_2420_clkdm,
142 	&dss_2420_clkdm,
143 	NULL,
144 };
145 
omap242x_clockdomains_init(void)146 void __init omap242x_clockdomains_init(void)
147 {
148 	if (!cpu_is_omap242x())
149 		return;
150 
151 	clkdm_register_platform_funcs(&omap2_clkdm_operations);
152 	clkdm_register_clkdms(clockdomains_omap242x);
153 	clkdm_complete_init();
154 }
155