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 */
 58static 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 */
 67static 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
 79static 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
 87static 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
 96static 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
103static 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
111static 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
119static 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
127static 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
134static 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
146void __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}