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 }; 145 146 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