arch/arm/mach-omap2/clock34xx.c

   1 /*
   2  * OMAP3-specific clock framework functions
   3  *
   4  * Copyright (C) 2007-2008 Texas Instruments, Inc.
   5  * Copyright (C) 2007-2008 Nokia Corporation
   6  *
   7  * Written by Paul Walmsley
   8  * Testing and integration fixes by Jouni Högander
   9  *
  10  * Parts of this code are based on code written by
  11  * Richard Woodruff, Tony Lindgren, Tuukka Tikkanen, Karthik Dasu
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License version 2 as
  15  * published by the Free Software Foundation.
  16  */
  17 #undef DEBUG
  18
  19 #include <linux/module.h>
  20 #include <linux/kernel.h>
  21 #include <linux/device.h>
  22 #include <linux/list.h>
  23 #include <linux/errno.h>
  24 #include <linux/delay.h>
  25 #include <linux/clk.h>
  26 #include <linux/io.h>
  27 #include <linux/limits.h>
  28 #include <linux/bitops.h>
  29
  30 #include <mach/clock.h>
  31 #include <mach/sram.h>
  32 #include <asm/div64.h>
  33 #include <asm/clkdev.h>
  34
  35 #include <mach/sdrc.h>
  36 #include "clock.h"
  37 #include "prm.h"
  38 #include "prm-regbits-34xx.h"
  39 #include "cm.h"
  40 #include "cm-regbits-34xx.h"
  41
  42 static const struct clkops clkops_noncore_dpll_ops;
  43
  44 #include "clock34xx.h"
  45
  46 struct omap_clk {
  47         u32             cpu;
  48         struct clk_lookup lk;
  49 };
  50
  51 #define CLK(dev, con, ck, cp)           \
  52         {                               \
  53                  .cpu = cp,             \
  54                 .lk = {                 \
  55                         .dev_id = dev,  \
  56                         .con_id = con,  \
  57                         .clk = ck,      \
  58                 },                      \
  59         }
  60
  61 #define CK_343X         (1 << 0)
  62 #define CK_3430ES1      (1 << 1)
  63 #define CK_3430ES2      (1 << 2)
  64
  65 static struct omap_clk omap34xx_clks[] = {
  66         CLK(NULL,       "omap_32k_fck", &omap_32k_fck,  CK_343X),
  67         CLK(NULL,       "virt_12m_ck",  &virt_12m_ck,   CK_343X),
  68         CLK(NULL,       "virt_13m_ck",  &virt_13m_ck,   CK_343X),
  69         CLK(NULL,       "virt_16_8m_ck", &virt_16_8m_ck, CK_3430ES2),
  70         CLK(NULL,       "virt_19_2m_ck", &virt_19_2m_ck, CK_343X),
  71         CLK(NULL,       "virt_26m_ck",  &virt_26m_ck,   CK_343X),
  72         CLK(NULL,       "virt_38_4m_ck", &virt_38_4m_ck, CK_343X),
  73         CLK(NULL,       "osc_sys_ck",   &osc_sys_ck,    CK_343X),
  74         CLK(NULL,       "sys_ck",       &sys_ck,        CK_343X),
  75         CLK(NULL,       "sys_altclk",   &sys_altclk,    CK_343X),
  76         CLK(NULL,       "mcbsp_clks",   &mcbsp_clks,    CK_343X),
  77         CLK(NULL,       "sys_clkout1",  &sys_clkout1,   CK_343X),
  78         CLK(NULL,       "dpll1_ck",     &dpll1_ck,      CK_343X),
  79         CLK(NULL,       "dpll1_x2_ck",  &dpll1_x2_ck,   CK_343X),
  80         CLK(NULL,       "dpll1_x2m2_ck", &dpll1_x2m2_ck, CK_343X),
  81         CLK(NULL,       "dpll2_ck",     &dpll2_ck,      CK_343X),
  82         CLK(NULL,       "dpll2_m2_ck",  &dpll2_m2_ck,   CK_343X),
  83         CLK(NULL,       "dpll3_ck",     &dpll3_ck,      CK_343X),
  84         CLK(NULL,       "core_ck",      &core_ck,       CK_343X),
  85         CLK(NULL,       "dpll3_x2_ck",  &dpll3_x2_ck,   CK_343X),
  86         CLK(NULL,       "dpll3_m2_ck",  &dpll3_m2_ck,   CK_343X),
  87         CLK(NULL,       "dpll3_m2x2_ck", &dpll3_m2x2_ck, CK_343X),
  88         CLK(NULL,       "dpll3_m3_ck",  &dpll3_m3_ck,   CK_343X),
  89         CLK(NULL,       "dpll3_m3x2_ck", &dpll3_m3x2_ck, CK_343X),
  90         CLK(NULL,       "emu_core_alwon_ck", &emu_core_alwon_ck, CK_343X),
  91         CLK(NULL,       "dpll4_ck",     &dpll4_ck,      CK_343X),
  92         CLK(NULL,       "dpll4_x2_ck",  &dpll4_x2_ck,   CK_343X),
  93         CLK(NULL,       "omap_96m_alwon_fck", &omap_96m_alwon_fck, CK_343X),
  94         CLK(NULL,       "omap_96m_fck", &omap_96m_fck,  CK_343X),
  95         CLK(NULL,       "cm_96m_fck",   &cm_96m_fck,    CK_343X),
  96         CLK(NULL,       "omap_54m_fck", &omap_54m_fck,  CK_343X),
  97         CLK(NULL,       "omap_48m_fck", &omap_48m_fck,  CK_343X),
  98         CLK(NULL,       "omap_12m_fck", &omap_12m_fck,  CK_343X),
  99         CLK(NULL,       "dpll4_m2_ck",  &dpll4_m2_ck,   CK_343X),
 100         CLK(NULL,       "dpll4_m2x2_ck", &dpll4_m2x2_ck, CK_343X),
 101         CLK(NULL,       "dpll4_m3_ck",  &dpll4_m3_ck,   CK_343X),
 102         CLK(NULL,       "dpll4_m3x2_ck", &dpll4_m3x2_ck, CK_343X),
 103         CLK(NULL,       "dpll4_m4_ck",  &dpll4_m4_ck,   CK_343X),
 104         CLK(NULL,       "dpll4_m4x2_ck", &dpll4_m4x2_ck, CK_343X),
 105         CLK(NULL,       "dpll4_m5_ck",  &dpll4_m5_ck,   CK_343X),
 106         CLK(NULL,       "dpll4_m5x2_ck", &dpll4_m5x2_ck, CK_343X),
 107         CLK(NULL,       "dpll4_m6_ck",  &dpll4_m6_ck,   CK_343X),
 108         CLK(NULL,       "dpll4_m6x2_ck", &dpll4_m6x2_ck, CK_343X),
 109         CLK(NULL,       "emu_per_alwon_ck", &emu_per_alwon_ck, CK_343X),
 110         CLK(NULL,       "dpll5_ck",     &dpll5_ck,      CK_3430ES2),
 111         CLK(NULL,       "dpll5_m2_ck",  &dpll5_m2_ck,   CK_3430ES2),
 112         CLK(NULL,       "clkout2_src_ck", &clkout2_src_ck, CK_343X),
 113         CLK(NULL,       "sys_clkout2",  &sys_clkout2,   CK_343X),
 114         CLK(NULL,       "corex2_fck",   &corex2_fck,    CK_343X),
 115         CLK(NULL,       "dpll1_fck",    &dpll1_fck,     CK_343X),
 116         CLK(NULL,       "mpu_ck",       &mpu_ck,        CK_343X),
 117         CLK(NULL,       "arm_fck",      &arm_fck,       CK_343X),
 118         CLK(NULL,       "emu_mpu_alwon_ck", &emu_mpu_alwon_ck, CK_343X),
 119         CLK(NULL,       "dpll2_fck",    &dpll2_fck,     CK_343X),
 120         CLK(NULL,       "iva2_ck",      &iva2_ck,       CK_343X),
 121         CLK(NULL,       "l3_ick",       &l3_ick,        CK_343X),
 122         CLK(NULL,       "l4_ick",       &l4_ick,        CK_343X),
 123         CLK(NULL,       "rm_ick",       &rm_ick,        CK_343X),
 124         CLK(NULL,       "gfx_l3_ck",    &gfx_l3_ck,     CK_3430ES1),
 125         CLK(NULL,       "gfx_l3_fck",   &gfx_l3_fck,    CK_3430ES1),
 126         CLK(NULL,       "gfx_l3_ick",   &gfx_l3_ick,    CK_3430ES1),
 127         CLK(NULL,       "gfx_cg1_ck",   &gfx_cg1_ck,    CK_3430ES1),
 128         CLK(NULL,       "gfx_cg2_ck",   &gfx_cg2_ck,    CK_3430ES1),
 129         CLK(NULL,       "sgx_fck",      &sgx_fck,       CK_3430ES2),
 130         CLK(NULL,       "sgx_ick",      &sgx_ick,       CK_3430ES2),
 131         CLK(NULL,       "d2d_26m_fck",  &d2d_26m_fck,   CK_3430ES1),
 132         CLK(NULL,       "gpt10_fck",    &gpt10_fck,     CK_343X),
 133         CLK(NULL,       "gpt11_fck",    &gpt11_fck,     CK_343X),
 134         CLK(NULL,       "cpefuse_fck",  &cpefuse_fck,   CK_3430ES2),
 135         CLK(NULL,       "ts_fck",       &ts_fck,        CK_3430ES2),
 136         CLK(NULL,       "usbtll_fck",   &usbtll_fck,    CK_3430ES2),
 137         CLK(NULL,       "core_96m_fck", &core_96m_fck,  CK_343X),
 138         CLK("mmci-omap-hs.2",   "fck",  &mmchs3_fck,    CK_3430ES2),
 139         CLK("mmci-omap-hs.1",   "fck",  &mmchs2_fck,    CK_343X),
 140         CLK(NULL,       "mspro_fck",    &mspro_fck,     CK_343X),
 141         CLK("mmci-omap-hs.0",   "fck",  &mmchs1_fck,    CK_343X),
 142         CLK("i2c_omap.3", "fck",        &i2c3_fck,      CK_343X),
 143         CLK("i2c_omap.2", "fck",        &i2c2_fck,      CK_343X),
 144         CLK("i2c_omap.1", "fck",        &i2c1_fck,      CK_343X),
 145         CLK("omap-mcbsp.5", "fck",      &mcbsp5_fck,    CK_343X),
 146         CLK("omap-mcbsp.1", "fck",      &mcbsp1_fck,    CK_343X),
 147         CLK(NULL,       "core_48m_fck", &core_48m_fck,  CK_343X),
 148         CLK("omap2_mcspi.4", "fck",     &mcspi4_fck,    CK_343X),
 149         CLK("omap2_mcspi.3", "fck",     &mcspi3_fck,    CK_343X),
 150         CLK("omap2_mcspi.2", "fck",     &mcspi2_fck,    CK_343X),
 151         CLK("omap2_mcspi.1", "fck",     &mcspi1_fck,    CK_343X),
 152         CLK(NULL,       "uart2_fck",    &uart2_fck,     CK_343X),
 153         CLK(NULL,       "uart1_fck",    &uart1_fck,     CK_343X),
 154         CLK(NULL,       "fshostusb_fck", &fshostusb_fck, CK_3430ES1),
 155         CLK(NULL,       "core_12m_fck", &core_12m_fck,  CK_343X),
 156         CLK("omap_hdq.0", "fck",        &hdq_fck,       CK_343X),
 157         CLK(NULL,       "ssi_ssr_fck",  &ssi_ssr_fck,   CK_343X),
 158         CLK(NULL,       "ssi_sst_fck",  &ssi_sst_fck,   CK_343X),
 159         CLK(NULL,       "core_l3_ick",  &core_l3_ick,   CK_343X),
 160         CLK("musb_hdrc",        "ick",  &hsotgusb_ick,  CK_343X),
 161         CLK(NULL,       "sdrc_ick",     &sdrc_ick,      CK_343X),
 162         CLK(NULL,       "gpmc_fck",     &gpmc_fck,      CK_343X),
 163         CLK(NULL,       "security_l3_ick", &security_l3_ick, CK_343X),
 164         CLK(NULL,       "pka_ick",      &pka_ick,       CK_343X),
 165         CLK(NULL,       "core_l4_ick",  &core_l4_ick,   CK_343X),
 166         CLK(NULL,       "usbtll_ick",   &usbtll_ick,    CK_3430ES2),
 167         CLK("mmci-omap-hs.2",   "ick",  &mmchs3_ick,    CK_3430ES2),
 168         CLK(NULL,       "icr_ick",      &icr_ick,       CK_343X),
 169         CLK(NULL,       "aes2_ick",     &aes2_ick,      CK_343X),
 170         CLK(NULL,       "sha12_ick",    &sha12_ick,     CK_343X),
 171         CLK(NULL,       "des2_ick",     &des2_ick,      CK_343X),
 172         CLK("mmci-omap-hs.1",   "ick",  &mmchs2_ick,    CK_343X),
 173         CLK("mmci-omap-hs.0",   "ick",  &mmchs1_ick,    CK_343X),
 174         CLK(NULL,       "mspro_ick",    &mspro_ick,     CK_343X),
 175         CLK("omap_hdq.0", "ick",        &hdq_ick,       CK_343X),
 176         CLK("omap2_mcspi.4", "ick",     &mcspi4_ick,    CK_343X),
 177         CLK("omap2_mcspi.3", "ick",     &mcspi3_ick,    CK_343X),
 178         CLK("omap2_mcspi.2", "ick",     &mcspi2_ick,    CK_343X),
 179         CLK("omap2_mcspi.1", "ick",     &mcspi1_ick,    CK_343X),
 180         CLK("i2c_omap.3", "ick",        &i2c3_ick,      CK_343X),
 181         CLK("i2c_omap.2", "ick",        &i2c2_ick,      CK_343X),
 182         CLK("i2c_omap.1", "ick",        &i2c1_ick,      CK_343X),
 183         CLK(NULL,       "uart2_ick",    &uart2_ick,     CK_343X),
 184         CLK(NULL,       "uart1_ick",    &uart1_ick,     CK_343X),
 185         CLK(NULL,       "gpt11_ick",    &gpt11_ick,     CK_343X),
 186         CLK(NULL,       "gpt10_ick",    &gpt10_ick,     CK_343X),
 187         CLK("omap-mcbsp.5", "ick",      &mcbsp5_ick,    CK_343X),
 188         CLK("omap-mcbsp.1", "ick",      &mcbsp1_ick,    CK_343X),
 189         CLK(NULL,       "fac_ick",      &fac_ick,       CK_3430ES1),
 190         CLK(NULL,       "mailboxes_ick", &mailboxes_ick, CK_343X),
 191         CLK(NULL,       "omapctrl_ick", &omapctrl_ick,  CK_343X),
 192         CLK(NULL,       "ssi_l4_ick",   &ssi_l4_ick,    CK_343X),
 193         CLK(NULL,       "ssi_ick",      &ssi_ick,       CK_343X),
 194         CLK(NULL,       "usb_l4_ick",   &usb_l4_ick,    CK_3430ES1),
 195         CLK(NULL,       "security_l4_ick2", &security_l4_ick2, CK_343X),
 196         CLK(NULL,       "aes1_ick",     &aes1_ick,      CK_343X),
 197         CLK("omap_rng", "ick",          &rng_ick,       CK_343X),
 198         CLK(NULL,       "sha11_ick",    &sha11_ick,     CK_343X),
 199         CLK(NULL,       "des1_ick",     &des1_ick,      CK_343X),
 200         CLK("omapfb",   "dss1_fck",     &dss1_alwon_fck, CK_343X),
 201         CLK("omapfb",   "tv_fck",       &dss_tv_fck,    CK_343X),
 202         CLK("omapfb",   "video_fck",    &dss_96m_fck,   CK_343X),
 203         CLK("omapfb",   "dss2_fck",     &dss2_alwon_fck, CK_343X),
 204         CLK("omapfb",   "ick",          &dss_ick,       CK_343X),
 205         CLK(NULL,       "cam_mclk",     &cam_mclk,      CK_343X),
 206         CLK(NULL,       "cam_ick",      &cam_ick,       CK_343X),
 207         CLK(NULL,       "csi2_96m_fck", &csi2_96m_fck,  CK_343X),
 208         CLK(NULL,       "usbhost_120m_fck", &usbhost_120m_fck, CK_3430ES2),
 209         CLK(NULL,       "usbhost_48m_fck", &usbhost_48m_fck, CK_3430ES2),
 210         CLK(NULL,       "usbhost_ick",  &usbhost_ick,   CK_3430ES2),
 211         CLK(NULL,       "usim_fck",     &usim_fck,      CK_3430ES2),
 212         CLK(NULL,       "gpt1_fck",     &gpt1_fck,      CK_343X),
 213         CLK(NULL,       "wkup_32k_fck", &wkup_32k_fck,  CK_343X),
 214         CLK(NULL,       "gpio1_dbck",   &gpio1_dbck,    CK_343X),
 215         CLK("omap_wdt", "fck",          &wdt2_fck,      CK_343X),
 216         CLK(NULL,       "wkup_l4_ick",  &wkup_l4_ick,   CK_343X),
 217         CLK(NULL,       "usim_ick",     &usim_ick,      CK_3430ES2),
 218         CLK("omap_wdt", "ick",          &wdt2_ick,      CK_343X),
 219         CLK(NULL,       "wdt1_ick",     &wdt1_ick,      CK_343X),
 220         CLK(NULL,       "gpio1_ick",    &gpio1_ick,     CK_343X),
 221         CLK(NULL,       "omap_32ksync_ick", &omap_32ksync_ick, CK_343X),
 222         CLK(NULL,       "gpt12_ick",    &gpt12_ick,     CK_343X),
 223         CLK(NULL,       "gpt1_ick",     &gpt1_ick,      CK_343X),
 224         CLK(NULL,       "per_96m_fck",  &per_96m_fck,   CK_343X),
 225         CLK(NULL,       "per_48m_fck",  &per_48m_fck,   CK_343X),
 226         CLK(NULL,       "uart3_fck",    &uart3_fck,     CK_343X),
 227         CLK(NULL,       "gpt2_fck",     &gpt2_fck,      CK_343X),
 228         CLK(NULL,       "gpt3_fck",     &gpt3_fck,      CK_343X),
 229         CLK(NULL,       "gpt4_fck",     &gpt4_fck,      CK_343X),
 230         CLK(NULL,       "gpt5_fck",     &gpt5_fck,      CK_343X),
 231         CLK(NULL,       "gpt6_fck",     &gpt6_fck,      CK_343X),
 232         CLK(NULL,       "gpt7_fck",     &gpt7_fck,      CK_343X),
 233         CLK(NULL,       "gpt8_fck",     &gpt8_fck,      CK_343X),
 234         CLK(NULL,       "gpt9_fck",     &gpt9_fck,      CK_343X),
 235         CLK(NULL,       "per_32k_alwon_fck", &per_32k_alwon_fck, CK_343X),
 236         CLK(NULL,       "gpio6_dbck",   &gpio6_dbck,    CK_343X),
 237         CLK(NULL,       "gpio5_dbck",   &gpio5_dbck,    CK_343X),
 238         CLK(NULL,       "gpio4_dbck",   &gpio4_dbck,    CK_343X),
 239         CLK(NULL,       "gpio3_dbck",   &gpio3_dbck,    CK_343X),
 240         CLK(NULL,       "gpio2_dbck",   &gpio2_dbck,    CK_343X),
 241         CLK(NULL,       "wdt3_fck",     &wdt3_fck,      CK_343X),
 242         CLK(NULL,       "per_l4_ick",   &per_l4_ick,    CK_343X),
 243         CLK(NULL,       "gpio6_ick",    &gpio6_ick,     CK_343X),
 244         CLK(NULL,       "gpio5_ick",    &gpio5_ick,     CK_343X),
 245         CLK(NULL,       "gpio4_ick",    &gpio4_ick,     CK_343X),
 246         CLK(NULL,       "gpio3_ick",    &gpio3_ick,     CK_343X),
 247         CLK(NULL,       "gpio2_ick",    &gpio2_ick,     CK_343X),
 248         CLK(NULL,       "wdt3_ick",     &wdt3_ick,      CK_343X),
 249         CLK(NULL,       "uart3_ick",    &uart3_ick,     CK_343X),
 250         CLK(NULL,       "gpt9_ick",     &gpt9_ick,      CK_343X),
 251         CLK(NULL,       "gpt8_ick",     &gpt8_ick,      CK_343X),
 252         CLK(NULL,       "gpt7_ick",     &gpt7_ick,      CK_343X),
 253         CLK(NULL,       "gpt6_ick",     &gpt6_ick,      CK_343X),
 254         CLK(NULL,       "gpt5_ick",     &gpt5_ick,      CK_343X),
 255         CLK(NULL,       "gpt4_ick",     &gpt4_ick,      CK_343X),
 256         CLK(NULL,       "gpt3_ick",     &gpt3_ick,      CK_343X),
 257         CLK(NULL,       "gpt2_ick",     &gpt2_ick,      CK_343X),
 258         CLK("omap-mcbsp.2", "ick",      &mcbsp2_ick,    CK_343X),
 259         CLK("omap-mcbsp.3", "ick",      &mcbsp3_ick,    CK_343X),
 260         CLK("omap-mcbsp.4", "ick",      &mcbsp4_ick,    CK_343X),
 261         CLK("omap-mcbsp.2", "fck",      &mcbsp2_fck,    CK_343X),
 262         CLK("omap-mcbsp.3", "fck",      &mcbsp3_fck,    CK_343X),
 263         CLK("omap-mcbsp.4", "fck",      &mcbsp4_fck,    CK_343X),
 264         CLK(NULL,       "emu_src_ck",   &emu_src_ck,    CK_343X),
 265         CLK(NULL,       "pclk_fck",     &pclk_fck,      CK_343X),
 266         CLK(NULL,       "pclkx2_fck",   &pclkx2_fck,    CK_343X),
 267         CLK(NULL,       "atclk_fck",    &atclk_fck,     CK_343X),
 268         CLK(NULL,       "traceclk_src_fck", &traceclk_src_fck, CK_343X),
 269         CLK(NULL,       "traceclk_fck", &traceclk_fck,  CK_343X),
 270         CLK(NULL,       "sr1_fck",      &sr1_fck,       CK_343X),
 271         CLK(NULL,       "sr2_fck",      &sr2_fck,       CK_343X),
 272         CLK(NULL,       "sr_l4_ick",    &sr_l4_ick,     CK_343X),
 273         CLK(NULL,       "secure_32k_fck", &secure_32k_fck, CK_343X),
 274         CLK(NULL,       "gpt12_fck",    &gpt12_fck,     CK_343X),
 275         CLK(NULL,       "wdt1_fck",     &wdt1_fck,      CK_343X),
 276 };
 277
 278 /* CM_AUTOIDLE_PLL*.AUTO_* bit values */
 279 #define DPLL_AUTOIDLE_DISABLE                   0x0
 280 #define DPLL_AUTOIDLE_LOW_POWER_STOP            0x1
 281
 282 #define MAX_DPLL_WAIT_TRIES             1000000
 283
 284 /**
 285  * omap3_dpll_recalc - recalculate DPLL rate
 286  * @clk: DPLL struct clk
 287  *
 288  * Recalculate and propagate the DPLL rate.
 289  */
 290 static unsigned long omap3_dpll_recalc(struct clk *clk)
 291 {
 292         return omap2_get_dpll_rate(clk);
 293 }
 294
 295 /* _omap3_dpll_write_clken - write clken_bits arg to a DPLL's enable bits */
 296 static void _omap3_dpll_write_clken(struct clk *clk, u8 clken_bits)
 297 {
 298         const struct dpll_data *dd;
 299         u32 v;
 300
 301         dd = clk->dpll_data;
 302
 303         v = __raw_readl(dd->control_reg);
 304         v &= ~dd->enable_mask;
 305         v |= clken_bits << __ffs(dd->enable_mask);
 306         __raw_writel(v, dd->control_reg);
 307 }
 308
 309 /* _omap3_wait_dpll_status: wait for a DPLL to enter a specific state */
 310 static int _omap3_wait_dpll_status(struct clk *clk, u8 state)
 311 {
 312         const struct dpll_data *dd;
 313         int i = 0;
 314         int ret = -EINVAL;
 315
 316         dd = clk->dpll_data;
 317
 318         state <<= __ffs(dd->idlest_mask);
 319
 320         while (((__raw_readl(dd->idlest_reg) & dd->idlest_mask) != state) &&
 321                i < MAX_DPLL_WAIT_TRIES) {
 322                 i++;
 323                 udelay(1);
 324         }
 325
 326         if (i == MAX_DPLL_WAIT_TRIES) {
 327                 printk(KERN_ERR "clock: %s failed transition to '%s'\n",
 328                        clk->name, (state) ? "locked" : "bypassed");
 329         } else {
 330                 pr_debug("clock: %s transition to '%s' in %d loops\n",
 331                          clk->name, (state) ? "locked" : "bypassed", i);
 332
 333                 ret = 0;
 334         }
 335
 336         return ret;
 337 }
 338
 339 /* From 3430 TRM ES2 4.7.6.2 */
 340 static u16 _omap3_dpll_compute_freqsel(struct clk *clk, u8 n)
 341 {
 342         unsigned long fint;
 343         u16 f = 0;
 344
 345         fint = clk->dpll_data->clk_ref->rate / (n + 1);
 346
 347         pr_debug("clock: fint is %lu\n", fint);
 348
 349         if (fint >= 750000 && fint <= 1000000)
 350                 f = 0x3;
 351         else if (fint > 1000000 && fint <= 1250000)
 352                 f = 0x4;
 353         else if (fint > 1250000 && fint <= 1500000)
 354                 f = 0x5;
 355         else if (fint > 1500000 && fint <= 1750000)
 356                 f = 0x6;
 357         else if (fint > 1750000 && fint <= 2100000)
 358                 f = 0x7;
 359         else if (fint > 7500000 && fint <= 10000000)
 360                 f = 0xB;
 361         else if (fint > 10000000 && fint <= 12500000)
 362                 f = 0xC;
 363         else if (fint > 12500000 && fint <= 15000000)
 364                 f = 0xD;
 365         else if (fint > 15000000 && fint <= 17500000)
 366                 f = 0xE;
 367         else if (fint > 17500000 && fint <= 21000000)
 368                 f = 0xF;
 369         else
 370                 pr_debug("clock: unknown freqsel setting for %d\n", n);
 371
 372         return f;
 373 }
 374
 375 /* Non-CORE DPLL (e.g., DPLLs that do not control SDRC) clock functions */
 376
 377 /*
 378  * _omap3_noncore_dpll_lock - instruct a DPLL to lock and wait for readiness
 379  * @clk: pointer to a DPLL struct clk
 380  *
 381  * Instructs a non-CORE DPLL to lock.  Waits for the DPLL to report
 382  * readiness before returning.  Will save and restore the DPLL's
 383  * autoidle state across the enable, per the CDP code.  If the DPLL
 384  * locked successfully, return 0; if the DPLL did not lock in the time
 385  * allotted, or DPLL3 was passed in, return -EINVAL.
 386  */
 387 static int _omap3_noncore_dpll_lock(struct clk *clk)
 388 {
 389         u8 ai;
 390         int r;
 391
 392         if (clk == &dpll3_ck)
 393                 return -EINVAL;
 394
 395         pr_debug("clock: locking DPLL %s\n", clk->name);
 396
 397         ai = omap3_dpll_autoidle_read(clk);
 398
 399         omap3_dpll_deny_idle(clk);
 400
 401         _omap3_dpll_write_clken(clk, DPLL_LOCKED);
 402
 403         r = _omap3_wait_dpll_status(clk, 1);
 404
 405         if (ai)
 406                 omap3_dpll_allow_idle(clk);
 407
 408         return r;
 409 }
 410
 411 /*
 412  * _omap3_noncore_dpll_bypass - instruct a DPLL to bypass and wait for readiness
 413  * @clk: pointer to a DPLL struct clk
 414  *
 415  * Instructs a non-CORE DPLL to enter low-power bypass mode.  In
 416  * bypass mode, the DPLL's rate is set equal to its parent clock's
 417  * rate.  Waits for the DPLL to report readiness before returning.
 418  * Will save and restore the DPLL's autoidle state across the enable,
 419  * per the CDP code.  If the DPLL entered bypass mode successfully,
 420  * return 0; if the DPLL did not enter bypass in the time allotted, or
 421  * DPLL3 was passed in, or the DPLL does not support low-power bypass,
 422  * return -EINVAL.
 423  */
 424 static int _omap3_noncore_dpll_bypass(struct clk *clk)
 425 {
 426         int r;
 427         u8 ai;
 428
 429         if (clk == &dpll3_ck)
 430                 return -EINVAL;
 431
 432         if (!(clk->dpll_data->modes & (1 << DPLL_LOW_POWER_BYPASS)))
 433                 return -EINVAL;
 434
 435         pr_debug("clock: configuring DPLL %s for low-power bypass\n",
 436                  clk->name);
 437
 438         ai = omap3_dpll_autoidle_read(clk);
 439
 440         _omap3_dpll_write_clken(clk, DPLL_LOW_POWER_BYPASS);
 441
 442         r = _omap3_wait_dpll_status(clk, 0);
 443
 444         if (ai)
 445                 omap3_dpll_allow_idle(clk);
 446         else
 447                 omap3_dpll_deny_idle(clk);
 448
 449         return r;
 450 }
 451
 452 /*
 453  * _omap3_noncore_dpll_stop - instruct a DPLL to stop
 454  * @clk: pointer to a DPLL struct clk
 455  *
 456  * Instructs a non-CORE DPLL to enter low-power stop. Will save and
 457  * restore the DPLL's autoidle state across the stop, per the CDP
 458  * code.  If DPLL3 was passed in, or the DPLL does not support
 459  * low-power stop, return -EINVAL; otherwise, return 0.
 460  */
 461 static int _omap3_noncore_dpll_stop(struct clk *clk)
 462 {
 463         u8 ai;
 464
 465         if (clk == &dpll3_ck)
 466                 return -EINVAL;
 467
 468         if (!(clk->dpll_data->modes & (1 << DPLL_LOW_POWER_STOP)))
 469                 return -EINVAL;
 470
 471         pr_debug("clock: stopping DPLL %s\n", clk->name);
 472
 473         ai = omap3_dpll_autoidle_read(clk);
 474
 475         _omap3_dpll_write_clken(clk, DPLL_LOW_POWER_STOP);
 476
 477         if (ai)
 478                 omap3_dpll_allow_idle(clk);
 479         else
 480                 omap3_dpll_deny_idle(clk);
 481
 482         return 0;
 483 }
 484
 485 /**
 486  * omap3_noncore_dpll_enable - instruct a DPLL to enter bypass or lock mode
 487  * @clk: pointer to a DPLL struct clk
 488  *
 489  * Instructs a non-CORE DPLL to enable, e.g., to enter bypass or lock.
 490  * The choice of modes depends on the DPLL's programmed rate: if it is
 491  * the same as the DPLL's parent clock, it will enter bypass;
 492  * otherwise, it will enter lock.  This code will wait for the DPLL to
 493  * indicate readiness before returning, unless the DPLL takes too long
 494  * to enter the target state.  Intended to be used as the struct clk's
 495  * enable function.  If DPLL3 was passed in, or the DPLL does not
 496  * support low-power stop, or if the DPLL took too long to enter
 497  * bypass or lock, return -EINVAL; otherwise, return 0.
 498  */
 499 static int omap3_noncore_dpll_enable(struct clk *clk)
 500 {
 501         int r;
 502         struct dpll_data *dd;
 503
 504         if (clk == &dpll3_ck)
 505                 return -EINVAL;
 506
 507         dd = clk->dpll_data;
 508         if (!dd)
 509                 return -EINVAL;
 510
 511         if (clk->rate == dd->clk_bypass->rate) {
 512                 WARN_ON(clk->parent != dd->clk_bypass);
 513                 r = _omap3_noncore_dpll_bypass(clk);
 514         } else {
 515                 WARN_ON(clk->parent != dd->clk_ref);
 516                 r = _omap3_noncore_dpll_lock(clk);
 517         }
 518         /* FIXME: this is dubious - if clk->rate has changed, what about propagating? */
 519         if (!r)
 520                 clk->rate = omap2_get_dpll_rate(clk);
 521
 522         return r;
 523 }
 524
 525 /**
 526  * omap3_noncore_dpll_enable - instruct a DPLL to enter bypass or lock mode
 527  * @clk: pointer to a DPLL struct clk
 528  *
 529  * Instructs a non-CORE DPLL to enable, e.g., to enter bypass or lock.
 530  * The choice of modes depends on the DPLL's programmed rate: if it is
 531  * the same as the DPLL's parent clock, it will enter bypass;
 532  * otherwise, it will enter lock.  This code will wait for the DPLL to
 533  * indicate readiness before returning, unless the DPLL takes too long
 534  * to enter the target state.  Intended to be used as the struct clk's
 535  * enable function.  If DPLL3 was passed in, or the DPLL does not
 536  * support low-power stop, or if the DPLL took too long to enter
 537  * bypass or lock, return -EINVAL; otherwise, return 0.
 538  */
 539 static void omap3_noncore_dpll_disable(struct clk *clk)
 540 {
 541         if (clk == &dpll3_ck)
 542                 return;
 543
 544         _omap3_noncore_dpll_stop(clk);
 545 }
 546
 547
 548 /* Non-CORE DPLL rate set code */
 549
 550 /*
 551  * omap3_noncore_dpll_program - set non-core DPLL M,N values directly
 552  * @clk: struct clk * of DPLL to set
 553  * @m: DPLL multiplier to set
 554  * @n: DPLL divider to set
 555  * @freqsel: FREQSEL value to set
 556  *
 557  * Program the DPLL with the supplied M, N values, and wait for the DPLL to
 558  * lock..  Returns -EINVAL upon error, or 0 upon success.
 559  */
 560 static int omap3_noncore_dpll_program(struct clk *clk, u16 m, u8 n, u16 freqsel)
 561 {
 562         struct dpll_data *dd = clk->dpll_data;
 563         u32 v;
 564
 565         /* 3430 ES2 TRM: 4.7.6.9 DPLL Programming Sequence */
 566         _omap3_noncore_dpll_bypass(clk);
 567
 568         /* Set jitter correction */
 569         v = __raw_readl(dd->control_reg);
 570         v &= ~dd->freqsel_mask;
 571         v |= freqsel << __ffs(dd->freqsel_mask);
 572         __raw_writel(v, dd->control_reg);
 573
 574         /* Set DPLL multiplier, divider */
 575         v = __raw_readl(dd->mult_div1_reg);
 576         v &= ~(dd->mult_mask | dd->div1_mask);
 577         v |= m << __ffs(dd->mult_mask);
 578         v |= (n - 1) << __ffs(dd->div1_mask);
 579         __raw_writel(v, dd->mult_div1_reg);
 580
 581         /* We let the clock framework set the other output dividers later */
 582
 583         /* REVISIT: Set ramp-up delay? */
 584
 585         _omap3_noncore_dpll_lock(clk);
 586
 587         return 0;
 588 }
 589
 590 /**
 591  * omap3_noncore_dpll_set_rate - set non-core DPLL rate
 592  * @clk: struct clk * of DPLL to set
 593  * @rate: rounded target rate
 594  *
 595  * Set the DPLL CLKOUT to the target rate.  If the DPLL can enter
 596  * low-power bypass, and the target rate is the bypass source clock
 597  * rate, then configure the DPLL for bypass.  Otherwise, round the
 598  * target rate if it hasn't been done already, then program and lock
 599  * the DPLL.  Returns -EINVAL upon error, or 0 upon success.
 600  */
 601 static int omap3_noncore_dpll_set_rate(struct clk *clk, unsigned long rate)
 602 {
 603         struct clk *new_parent = NULL;
 604         u16 freqsel;
 605         struct dpll_data *dd;
 606         int ret;
 607
 608         if (!clk || !rate)
 609                 return -EINVAL;
 610
 611         dd = clk->dpll_data;
 612         if (!dd)
 613                 return -EINVAL;
 614
 615         if (rate == omap2_get_dpll_rate(clk))
 616                 return 0;
 617
 618         /*
 619          * Ensure both the bypass and ref clocks are enabled prior to
 620          * doing anything; we need the bypass clock running to reprogram
 621          * the DPLL.
 622          */
 623         omap2_clk_enable(dd->clk_bypass);
 624         omap2_clk_enable(dd->clk_ref);
 625
 626         if (dd->clk_bypass->rate == rate &&
 627             (clk->dpll_data->modes & (1 << DPLL_LOW_POWER_BYPASS))) {
 628                 pr_debug("clock: %s: set rate: entering bypass.\n", clk->name);
 629
 630                 ret = _omap3_noncore_dpll_bypass(clk);
 631                 if (!ret)
 632                         new_parent = dd->clk_bypass;
 633         } else {
 634                 if (dd->last_rounded_rate != rate)
 635                         omap2_dpll_round_rate(clk, rate);
 636
 637                 if (dd->last_rounded_rate == 0)
 638                         return -EINVAL;
 639
 640                 freqsel = _omap3_dpll_compute_freqsel(clk, dd->last_rounded_n);
 641                 if (!freqsel)
 642                         WARN_ON(1);
 643
 644                 pr_debug("clock: %s: set rate: locking rate to %lu.\n",
 645                          clk->name, rate);
 646
 647                 ret = omap3_noncore_dpll_program(clk, dd->last_rounded_m,
 648                                                  dd->last_rounded_n, freqsel);
 649                 if (!ret)
 650                         new_parent = dd->clk_ref;
 651         }
 652         if (!ret) {
 653                 /*
 654                  * Switch the parent clock in the heirarchy, and make sure
 655                  * that the new parent's usecount is correct.  Note: we
 656                  * enable the new parent before disabling the old to avoid
 657                  * any unnecessary hardware disable->enable transitions.
 658                  */
 659                 if (clk->usecount) {
 660                         omap2_clk_enable(new_parent);
 661                         omap2_clk_disable(clk->parent);
 662                 }
 663                 clk_reparent(clk, new_parent);
 664                 clk->rate = rate;
 665         }
 666         omap2_clk_disable(dd->clk_ref);
 667         omap2_clk_disable(dd->clk_bypass);
 668
 669         return 0;
 670 }
 671
 672 static int omap3_dpll4_set_rate(struct clk *clk, unsigned long rate)
 673 {
 674         /*
 675          * According to the 12-5 CDP code from TI, "Limitation 2.5"
 676          * on 3430ES1 prevents us from changing DPLL multipliers or dividers
 677          * on DPLL4.
 678          */
 679         if (omap_rev() == OMAP3430_REV_ES1_0) {
 680                 printk(KERN_ERR "clock: DPLL4 cannot change rate due to "
 681                        "silicon 'Limitation 2.5' on 3430ES1.\n");
 682                 return -EINVAL;
 683         }
 684         return omap3_noncore_dpll_set_rate(clk, rate);
 685 }
 686
 687
 688 /*
 689  * CORE DPLL (DPLL3) rate programming functions
 690  *
 691  * These call into SRAM code to do the actual CM writes, since the SDRAM
 692  * is clocked from DPLL3.
 693  */
 694
 695 /**
 696  * omap3_core_dpll_m2_set_rate - set CORE DPLL M2 divider
 697  * @clk: struct clk * of DPLL to set
 698  * @rate: rounded target rate
 699  *
 700  * Program the DPLL M2 divider with the rounded target rate.  Returns
 701  * -EINVAL upon error, or 0 upon success.
 702  */
 703 static int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate)
 704 {
 705         u32 new_div = 0;
 706         unsigned long validrate, sdrcrate;
 707         struct omap_sdrc_params *sp;
 708
 709         if (!clk || !rate)
 710                 return -EINVAL;
 711
 712         if (clk != &dpll3_m2_ck)
 713                 return -EINVAL;
 714
 715         if (rate == clk->rate)
 716                 return 0;
 717
 718         validrate = omap2_clksel_round_rate_div(clk, rate, &new_div);
 719         if (validrate != rate)
 720                 return -EINVAL;
 721
 722         sdrcrate = sdrc_ick.rate;
 723         if (rate > clk->rate)
 724                 sdrcrate <<= ((rate / clk->rate) - 1);
 725         else
 726                 sdrcrate >>= ((clk->rate / rate) - 1);
 727
 728         sp = omap2_sdrc_get_params(sdrcrate);
 729         if (!sp)
 730                 return -EINVAL;
 731
 732         pr_info("clock: changing CORE DPLL rate from %lu to %lu\n", clk->rate,
 733                 validrate);
 734         pr_info("clock: SDRC timing params used: %08x %08x %08x\n",
 735                 sp->rfr_ctrl, sp->actim_ctrla, sp->actim_ctrlb);
 736
 737         /* REVISIT: SRAM code doesn't support other M2 divisors yet */
 738         WARN_ON(new_div != 1 && new_div != 2);
 739
 740         /* REVISIT: Add SDRC_MR changing to this code also */
 741         omap3_configure_core_dpll(sp->rfr_ctrl, sp->actim_ctrla,
 742                                   sp->actim_ctrlb, new_div);
 743
 744         return 0;
 745 }
 746
 747
 748 static const struct clkops clkops_noncore_dpll_ops = {
 749         .enable         = &omap3_noncore_dpll_enable,
 750         .disable        = &omap3_noncore_dpll_disable,
 751 };
 752
 753 /* DPLL autoidle read/set code */
 754
 755
 756 /**
 757  * omap3_dpll_autoidle_read - read a DPLL's autoidle bits
 758  * @clk: struct clk * of the DPLL to read
 759  *
 760  * Return the DPLL's autoidle bits, shifted down to bit 0.  Returns
 761  * -EINVAL if passed a null pointer or if the struct clk does not
 762  * appear to refer to a DPLL.
 763  */
 764 static u32 omap3_dpll_autoidle_read(struct clk *clk)
 765 {
 766         const struct dpll_data *dd;
 767         u32 v;
 768
 769         if (!clk || !clk->dpll_data)
 770                 return -EINVAL;
 771
 772         dd = clk->dpll_data;
 773
 774         v = __raw_readl(dd->autoidle_reg);
 775         v &= dd->autoidle_mask;
 776         v >>= __ffs(dd->autoidle_mask);
 777
 778         return v;
 779 }
 780
 781 /**
 782  * omap3_dpll_allow_idle - enable DPLL autoidle bits
 783  * @clk: struct clk * of the DPLL to operate on
 784  *
 785  * Enable DPLL automatic idle control.  This automatic idle mode
 786  * switching takes effect only when the DPLL is locked, at least on
 787  * OMAP3430.  The DPLL will enter low-power stop when its downstream
 788  * clocks are gated.  No return value.
 789  */
 790 static void omap3_dpll_allow_idle(struct clk *clk)
 791 {
 792         const struct dpll_data *dd;
 793         u32 v;
 794
 795         if (!clk || !clk->dpll_data)
 796                 return;
 797
 798         dd = clk->dpll_data;
 799
 800         /*
 801          * REVISIT: CORE DPLL can optionally enter low-power bypass
 802          * by writing 0x5 instead of 0x1.  Add some mechanism to
 803          * optionally enter this mode.
 804          */
 805         v = __raw_readl(dd->autoidle_reg);
 806         v &= ~dd->autoidle_mask;
 807         v |= DPLL_AUTOIDLE_LOW_POWER_STOP << __ffs(dd->autoidle_mask);
 808         __raw_writel(v, dd->autoidle_reg);
 809 }
 810
 811 /**
 812  * omap3_dpll_deny_idle - prevent DPLL from automatically idling
 813  * @clk: struct clk * of the DPLL to operate on
 814  *
 815  * Disable DPLL automatic idle control.  No return value.
 816  */
 817 static void omap3_dpll_deny_idle(struct clk *clk)
 818 {
 819         const struct dpll_data *dd;
 820         u32 v;
 821
 822         if (!clk || !clk->dpll_data)
 823                 return;
 824
 825         dd = clk->dpll_data;
 826
 827         v = __raw_readl(dd->autoidle_reg);
 828         v &= ~dd->autoidle_mask;
 829         v |= DPLL_AUTOIDLE_DISABLE << __ffs(dd->autoidle_mask);
 830         __raw_writel(v, dd->autoidle_reg);
 831 }
 832
 833 /* Clock control for DPLL outputs */
 834
 835 /**
 836  * omap3_clkoutx2_recalc - recalculate DPLL X2 output virtual clock rate
 837  * @clk: DPLL output struct clk
 838  *
 839  * Using parent clock DPLL data, look up DPLL state.  If locked, set our
 840  * rate to the dpll_clk * 2; otherwise, just use dpll_clk.
 841  */
 842 static unsigned long omap3_clkoutx2_recalc(struct clk *clk)
 843 {
 844         const struct dpll_data *dd;
 845         unsigned long rate;
 846         u32 v;
 847         struct clk *pclk;
 848
 849         /* Walk up the parents of clk, looking for a DPLL */
 850         pclk = clk->parent;
 851         while (pclk && !pclk->dpll_data)
 852                 pclk = pclk->parent;
 853
 854         /* clk does not have a DPLL as a parent? */
 855         WARN_ON(!pclk);
 856
 857         dd = pclk->dpll_data;
 858
 859         WARN_ON(!dd->enable_mask);
 860
 861         v = __raw_readl(dd->control_reg) & dd->enable_mask;
 862         v >>= __ffs(dd->enable_mask);
 863         if (v != OMAP3XXX_EN_DPLL_LOCKED)
 864                 rate = clk->parent->rate;
 865         else
 866                 rate = clk->parent->rate * 2;
 867         return rate;
 868 }
 869
 870 /* Common clock code */
 871
 872 /*
 873  * As it is structured now, this will prevent an OMAP2/3 multiboot
 874  * kernel from compiling.  This will need further attention.
 875  */
 876 #if defined(CONFIG_ARCH_OMAP3)
 877
 878 static struct clk_functions omap2_clk_functions = {
 879         .clk_enable             = omap2_clk_enable,
 880         .clk_disable            = omap2_clk_disable,
 881         .clk_round_rate         = omap2_clk_round_rate,
 882         .clk_set_rate           = omap2_clk_set_rate,
 883         .clk_set_parent         = omap2_clk_set_parent,
 884         .clk_disable_unused     = omap2_clk_disable_unused,
 885 };
 886
 887 /*
 888  * Set clocks for bypass mode for reboot to work.
 889  */
 890 void omap2_clk_prepare_for_reboot(void)
 891 {
 892         /* REVISIT: Not ready for 343x */
 893 #if 0
 894         u32 rate;
 895
 896         if (vclk == NULL || sclk == NULL)
 897                 return;
 898
 899         rate = clk_get_rate(sclk);
 900         clk_set_rate(vclk, rate);
 901 #endif
 902 }
 903
 904 /* REVISIT: Move this init stuff out into clock.c */
 905
 906 /*
 907  * Switch the MPU rate if specified on cmdline.
 908  * We cannot do this early until cmdline is parsed.
 909  */
 910 static int __init omap2_clk_arch_init(void)
 911 {
 912         if (!mpurate)
 913                 return -EINVAL;
 914
 915         /* REVISIT: not yet ready for 343x */
 916 #if 0
 917         if (clk_set_rate(&virt_prcm_set, mpurate))
 918                 printk(KERN_ERR "Could not find matching MPU rate\n");
 919 #endif
 920
 921         recalculate_root_clocks();
 922
 923         printk(KERN_INFO "Switched to new clocking rate (Crystal/DPLL3/MPU): "
 924                "%ld.%01ld/%ld/%ld MHz\n",
 925                (osc_sys_ck.rate / 1000000), (osc_sys_ck.rate / 100000) % 10,
 926                (core_ck.rate / 1000000), (dpll1_fck.rate / 1000000)) ;
 927
 928         return 0;
 929 }
 930 arch_initcall(omap2_clk_arch_init);
 931
 932 int __init omap2_clk_init(void)
 933 {
 934         /* struct prcm_config *prcm; */
 935         struct omap_clk *c;
 936         /* u32 clkrate; */
 937         u32 cpu_clkflg;
 938
 939         if (cpu_is_omap34xx()) {
 940                 cpu_mask = RATE_IN_343X;
 941                 cpu_clkflg = CK_343X;
 942
 943                 /*
 944                  * Update this if there are further clock changes between ES2
 945                  * and production parts
 946                  */
 947                 if (omap_rev() == OMAP3430_REV_ES1_0) {
 948                         /* No 3430ES1-only rates exist, so no RATE_IN_3430ES1 */
 949                         cpu_clkflg |= CK_3430ES1;
 950                 } else {
 951                         cpu_mask |= RATE_IN_3430ES2;
 952                         cpu_clkflg |= CK_3430ES2;
 953                 }
 954         }
 955
 956         clk_init(&omap2_clk_functions);
 957
 958         for (c = omap34xx_clks; c < omap34xx_clks + ARRAY_SIZE(omap34xx_clks); c++)
 959                 clk_init_one(c->lk.clk);
 960
 961         for (c = omap34xx_clks; c < omap34xx_clks + ARRAY_SIZE(omap34xx_clks); c++)
 962                 if (c->cpu & cpu_clkflg) {
 963                         clkdev_add(&c->lk);
 964                         clk_register(c->lk.clk);
 965                         omap2_init_clk_clkdm(c->lk.clk);
 966                 }
 967
 968         /* REVISIT: Not yet ready for OMAP3 */
 969 #if 0
 970         /* Check the MPU rate set by bootloader */
 971         clkrate = omap2_get_dpll_rate_24xx(&dpll_ck);
 972         for (prcm = rate_table; prcm->mpu_speed; prcm++) {
 973                 if (!(prcm->flags & cpu_mask))
 974                         continue;
 975                 if (prcm->xtal_speed != sys_ck.rate)
 976                         continue;
 977                 if (prcm->dpll_speed <= clkrate)
 978                          break;
 979         }
 980         curr_prcm_set = prcm;
 981 #endif
 982
 983         recalculate_root_clocks();
 984
 985         printk(KERN_INFO "Clocking rate (Crystal/DPLL/ARM core): "
 986                "%ld.%01ld/%ld/%ld MHz\n",
 987                (osc_sys_ck.rate / 1000000), (osc_sys_ck.rate / 100000) % 10,
 988                (core_ck.rate / 1000000), (arm_fck.rate / 1000000));
 989
 990         /*
 991          * Only enable those clocks we will need, let the drivers
 992          * enable other clocks as necessary
 993          */
 994         clk_enable_init_clocks();
 995
 996         /* Avoid sleeping during omap2_clk_prepare_for_reboot() */
 997         /* REVISIT: not yet ready for 343x */
 998 #if 0
 999         vclk = clk_get(NULL, "virt_prcm_set");
1000         sclk = clk_get(NULL, "sys_ck");
1001 #endif
1002         return 0;
1003 }
1004
1005 #endif