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clock34xx.c

/*
 * OMAP3-specific clock framework functions
 *
 * Copyright (C) 2007-2008 Texas Instruments, Inc.
 * Copyright (C) 2007-2009 Nokia Corporation
 *
 * Written by Paul Walmsley
 * Testing and integration fixes by Jouni Högander
 *
 * Parts of this code are based on code written by
 * Richard Woodruff, Tony Lindgren, Tuukka Tikkanen, Karthik Dasu
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#undef DEBUG

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/limits.h>
#include <linux/bitops.h>

#include <mach/cpu.h>
#include <mach/clock.h>
#include <mach/sram.h>
#include <asm/div64.h>
#include <asm/clkdev.h>

#include <mach/sdrc.h>
#include "clock.h"
#include "prm.h"
#include "prm-regbits-34xx.h"
#include "cm.h"
#include "cm-regbits-34xx.h"

static const struct clkops clkops_noncore_dpll_ops;

static void omap3430es2_clk_ssi_find_idlest(struct clk *clk,
                                  void __iomem **idlest_reg,
                                  u8 *idlest_bit);
static void omap3430es2_clk_hsotgusb_find_idlest(struct clk *clk,
                                  void __iomem **idlest_reg,
                                  u8 *idlest_bit);
static void omap3430es2_clk_dss_usbhost_find_idlest(struct clk *clk,
                                        void __iomem **idlest_reg,
                                        u8 *idlest_bit);

static const struct clkops clkops_omap3430es2_ssi_wait = {
      .enable           = omap2_dflt_clk_enable,
      .disable    = omap2_dflt_clk_disable,
      .find_idlest      = omap3430es2_clk_ssi_find_idlest,
      .find_companion = omap2_clk_dflt_find_companion,
};

static const struct clkops clkops_omap3430es2_hsotgusb_wait = {
      .enable           = omap2_dflt_clk_enable,
      .disable    = omap2_dflt_clk_disable,
      .find_idlest      = omap3430es2_clk_hsotgusb_find_idlest,
      .find_companion = omap2_clk_dflt_find_companion,
};

static const struct clkops clkops_omap3430es2_dss_usbhost_wait = {
      .enable           = omap2_dflt_clk_enable,
      .disable    = omap2_dflt_clk_disable,
      .find_idlest      = omap3430es2_clk_dss_usbhost_find_idlest,
      .find_companion = omap2_clk_dflt_find_companion,
};

#include "clock34xx.h"

struct omap_clk {
      u32         cpu;
      struct clk_lookup lk;
};

#define CLK(dev, con, ck, cp)             \
      {                       \
             .cpu = cp,       \
            .lk = {                 \
                  .dev_id = dev,    \
                  .con_id = con,    \
                  .clk = ck,  \
            },                \
      }

#define CK_343X         (1 << 0)
#define CK_3430ES1      (1 << 1)
#define CK_3430ES2      (1 << 2)

static struct omap_clk omap34xx_clks[] = {
      CLK(NULL,   "omap_32k_fck",   &omap_32k_fck,    CK_343X),
      CLK(NULL,   "virt_12m_ck",    &virt_12m_ck,     CK_343X),
      CLK(NULL,   "virt_13m_ck",    &virt_13m_ck,     CK_343X),
      CLK(NULL,   "virt_16_8m_ck", &virt_16_8m_ck, CK_3430ES2),
      CLK(NULL,   "virt_19_2m_ck", &virt_19_2m_ck, CK_343X),
      CLK(NULL,   "virt_26m_ck",    &virt_26m_ck,     CK_343X),
      CLK(NULL,   "virt_38_4m_ck", &virt_38_4m_ck, CK_343X),
      CLK(NULL,   "osc_sys_ck",     &osc_sys_ck,      CK_343X),
      CLK(NULL,   "sys_ck",   &sys_ck,    CK_343X),
      CLK(NULL,   "sys_altclk",     &sys_altclk,      CK_343X),
      CLK(NULL,   "mcbsp_clks",     &mcbsp_clks,      CK_343X),
      CLK(NULL,   "sys_clkout1",    &sys_clkout1,     CK_343X),
      CLK(NULL,   "dpll1_ck", &dpll1_ck,  CK_343X),
      CLK(NULL,   "dpll1_x2_ck",    &dpll1_x2_ck,     CK_343X),
      CLK(NULL,   "dpll1_x2m2_ck", &dpll1_x2m2_ck, CK_343X),
      CLK(NULL,   "dpll2_ck", &dpll2_ck,  CK_343X),
      CLK(NULL,   "dpll2_m2_ck",    &dpll2_m2_ck,     CK_343X),
      CLK(NULL,   "dpll3_ck", &dpll3_ck,  CK_343X),
      CLK(NULL,   "core_ck",  &core_ck,   CK_343X),
      CLK(NULL,   "dpll3_x2_ck",    &dpll3_x2_ck,     CK_343X),
      CLK(NULL,   "dpll3_m2_ck",    &dpll3_m2_ck,     CK_343X),
      CLK(NULL,   "dpll3_m2x2_ck", &dpll3_m2x2_ck, CK_343X),
      CLK(NULL,   "dpll3_m3_ck",    &dpll3_m3_ck,     CK_343X),
      CLK(NULL,   "dpll3_m3x2_ck", &dpll3_m3x2_ck, CK_343X),
      CLK(NULL,   "emu_core_alwon_ck", &emu_core_alwon_ck, CK_343X),
      CLK(NULL,   "dpll4_ck", &dpll4_ck,  CK_343X),
      CLK(NULL,   "dpll4_x2_ck",    &dpll4_x2_ck,     CK_343X),
      CLK(NULL,   "omap_96m_alwon_fck", &omap_96m_alwon_fck, CK_343X),
      CLK(NULL,   "omap_96m_fck",   &omap_96m_fck,    CK_343X),
      CLK(NULL,   "cm_96m_fck",     &cm_96m_fck,      CK_343X),
      CLK(NULL,   "omap_54m_fck",   &omap_54m_fck,    CK_343X),
      CLK(NULL,   "omap_48m_fck",   &omap_48m_fck,    CK_343X),
      CLK(NULL,   "omap_12m_fck",   &omap_12m_fck,    CK_343X),
      CLK(NULL,   "dpll4_m2_ck",    &dpll4_m2_ck,     CK_343X),
      CLK(NULL,   "dpll4_m2x2_ck", &dpll4_m2x2_ck, CK_343X),
      CLK(NULL,   "dpll4_m3_ck",    &dpll4_m3_ck,     CK_343X),
      CLK(NULL,   "dpll4_m3x2_ck", &dpll4_m3x2_ck, CK_343X),
      CLK(NULL,   "dpll4_m4_ck",    &dpll4_m4_ck,     CK_343X),
      CLK(NULL,   "dpll4_m4x2_ck", &dpll4_m4x2_ck, CK_343X),
      CLK(NULL,   "dpll4_m5_ck",    &dpll4_m5_ck,     CK_343X),
      CLK(NULL,   "dpll4_m5x2_ck", &dpll4_m5x2_ck, CK_343X),
      CLK(NULL,   "dpll4_m6_ck",    &dpll4_m6_ck,     CK_343X),
      CLK(NULL,   "dpll4_m6x2_ck", &dpll4_m6x2_ck, CK_343X),
      CLK(NULL,   "emu_per_alwon_ck", &emu_per_alwon_ck, CK_343X),
      CLK(NULL,   "dpll5_ck", &dpll5_ck,  CK_3430ES2),
      CLK(NULL,   "dpll5_m2_ck",    &dpll5_m2_ck,     CK_3430ES2),
      CLK(NULL,   "clkout2_src_ck", &clkout2_src_ck, CK_343X),
      CLK(NULL,   "sys_clkout2",    &sys_clkout2,     CK_343X),
      CLK(NULL,   "corex2_fck",     &corex2_fck,      CK_343X),
      CLK(NULL,   "dpll1_fck",      &dpll1_fck, CK_343X),
      CLK(NULL,   "mpu_ck",   &mpu_ck,    CK_343X),
      CLK(NULL,   "arm_fck",  &arm_fck,   CK_343X),
      CLK(NULL,   "emu_mpu_alwon_ck", &emu_mpu_alwon_ck, CK_343X),
      CLK(NULL,   "dpll2_fck",      &dpll2_fck, CK_343X),
      CLK(NULL,   "iva2_ck",  &iva2_ck,   CK_343X),
      CLK(NULL,   "l3_ick",   &l3_ick,    CK_343X),
      CLK(NULL,   "l4_ick",   &l4_ick,    CK_343X),
      CLK(NULL,   "rm_ick",   &rm_ick,    CK_343X),
      CLK(NULL,   "gfx_l3_ck",      &gfx_l3_ck, CK_3430ES1),
      CLK(NULL,   "gfx_l3_fck",     &gfx_l3_fck,      CK_3430ES1),
      CLK(NULL,   "gfx_l3_ick",     &gfx_l3_ick,      CK_3430ES1),
      CLK(NULL,   "gfx_cg1_ck",     &gfx_cg1_ck,      CK_3430ES1),
      CLK(NULL,   "gfx_cg2_ck",     &gfx_cg2_ck,      CK_3430ES1),
      CLK(NULL,   "sgx_fck",  &sgx_fck,   CK_3430ES2),
      CLK(NULL,   "sgx_ick",  &sgx_ick,   CK_3430ES2),
      CLK(NULL,   "d2d_26m_fck",    &d2d_26m_fck,     CK_3430ES1),
      CLK(NULL,   "modem_fck",      &modem_fck, CK_343X),
      CLK(NULL,   "sad2d_ick",      &sad2d_ick, CK_343X),
      CLK(NULL,   "mad2d_ick",      &mad2d_ick, CK_343X),
      CLK(NULL,   "gpt10_fck",      &gpt10_fck, CK_343X),
      CLK(NULL,   "gpt11_fck",      &gpt11_fck, CK_343X),
      CLK(NULL,   "cpefuse_fck",    &cpefuse_fck,     CK_3430ES2),
      CLK(NULL,   "ts_fck",   &ts_fck,    CK_3430ES2),
      CLK(NULL,   "usbtll_fck",     &usbtll_fck,      CK_3430ES2),
      CLK(NULL,   "core_96m_fck",   &core_96m_fck,    CK_343X),
      CLK("mmci-omap-hs.2",   "fck",      &mmchs3_fck,      CK_3430ES2),
      CLK("mmci-omap-hs.1",   "fck",      &mmchs2_fck,      CK_343X),
      CLK(NULL,   "mspro_fck",      &mspro_fck, CK_343X),
      CLK("mmci-omap-hs.0",   "fck",      &mmchs1_fck,      CK_343X),
      CLK("i2c_omap.3", "fck",      &i2c3_fck,  CK_343X),
      CLK("i2c_omap.2", "fck",      &i2c2_fck,  CK_343X),
      CLK("i2c_omap.1", "fck",      &i2c1_fck,  CK_343X),
      CLK("omap-mcbsp.5", "fck",    &mcbsp5_fck,      CK_343X),
      CLK("omap-mcbsp.1", "fck",    &mcbsp1_fck,      CK_343X),
      CLK(NULL,   "core_48m_fck",   &core_48m_fck,    CK_343X),
      CLK("omap2_mcspi.4", "fck",   &mcspi4_fck,      CK_343X),
      CLK("omap2_mcspi.3", "fck",   &mcspi3_fck,      CK_343X),
      CLK("omap2_mcspi.2", "fck",   &mcspi2_fck,      CK_343X),
      CLK("omap2_mcspi.1", "fck",   &mcspi1_fck,      CK_343X),
      CLK(NULL,   "uart2_fck",      &uart2_fck, CK_343X),
      CLK(NULL,   "uart1_fck",      &uart1_fck, CK_343X),
      CLK(NULL,   "fshostusb_fck", &fshostusb_fck, CK_3430ES1),
      CLK(NULL,   "core_12m_fck",   &core_12m_fck,    CK_343X),
      CLK("omap_hdq.0", "fck",      &hdq_fck,   CK_343X),
      CLK(NULL,   "ssi_ssr_fck",    &ssi_ssr_fck_3430es1,   CK_3430ES1),
      CLK(NULL,   "ssi_ssr_fck",    &ssi_ssr_fck_3430es2,   CK_3430ES2),
      CLK(NULL,   "ssi_sst_fck",    &ssi_sst_fck_3430es1,   CK_3430ES1),
      CLK(NULL,   "ssi_sst_fck",    &ssi_sst_fck_3430es2,   CK_3430ES2),
      CLK(NULL,   "core_l3_ick",    &core_l3_ick,     CK_343X),
      CLK("musb_hdrc",  "ick",      &hsotgusb_ick_3430es1,  CK_3430ES1),
      CLK("musb_hdrc",  "ick",      &hsotgusb_ick_3430es2,  CK_3430ES2),
      CLK(NULL,   "sdrc_ick", &sdrc_ick,  CK_343X),
      CLK(NULL,   "gpmc_fck", &gpmc_fck,  CK_343X),
      CLK(NULL,   "security_l3_ick", &security_l3_ick, CK_343X),
      CLK(NULL,   "pka_ick",  &pka_ick,   CK_343X),
      CLK(NULL,   "core_l4_ick",    &core_l4_ick,     CK_343X),
      CLK(NULL,   "usbtll_ick",     &usbtll_ick,      CK_3430ES2),
      CLK("mmci-omap-hs.2",   "ick",      &mmchs3_ick,      CK_3430ES2),
      CLK(NULL,   "icr_ick",  &icr_ick,   CK_343X),
      CLK(NULL,   "aes2_ick", &aes2_ick,  CK_343X),
      CLK(NULL,   "sha12_ick",      &sha12_ick, CK_343X),
      CLK(NULL,   "des2_ick", &des2_ick,  CK_343X),
      CLK("mmci-omap-hs.1",   "ick",      &mmchs2_ick,      CK_343X),
      CLK("mmci-omap-hs.0",   "ick",      &mmchs1_ick,      CK_343X),
      CLK(NULL,   "mspro_ick",      &mspro_ick, CK_343X),
      CLK("omap_hdq.0", "ick",      &hdq_ick,   CK_343X),
      CLK("omap2_mcspi.4", "ick",   &mcspi4_ick,      CK_343X),
      CLK("omap2_mcspi.3", "ick",   &mcspi3_ick,      CK_343X),
      CLK("omap2_mcspi.2", "ick",   &mcspi2_ick,      CK_343X),
      CLK("omap2_mcspi.1", "ick",   &mcspi1_ick,      CK_343X),
      CLK("i2c_omap.3", "ick",      &i2c3_ick,  CK_343X),
      CLK("i2c_omap.2", "ick",      &i2c2_ick,  CK_343X),
      CLK("i2c_omap.1", "ick",      &i2c1_ick,  CK_343X),
      CLK(NULL,   "uart2_ick",      &uart2_ick, CK_343X),
      CLK(NULL,   "uart1_ick",      &uart1_ick, CK_343X),
      CLK(NULL,   "gpt11_ick",      &gpt11_ick, CK_343X),
      CLK(NULL,   "gpt10_ick",      &gpt10_ick, CK_343X),
      CLK("omap-mcbsp.5", "ick",    &mcbsp5_ick,      CK_343X),
      CLK("omap-mcbsp.1", "ick",    &mcbsp1_ick,      CK_343X),
      CLK(NULL,   "fac_ick",  &fac_ick,   CK_3430ES1),
      CLK(NULL,   "mailboxes_ick", &mailboxes_ick, CK_343X),
      CLK(NULL,   "omapctrl_ick",   &omapctrl_ick,    CK_343X),
      CLK(NULL,   "ssi_l4_ick",     &ssi_l4_ick,      CK_343X),
      CLK(NULL,   "ssi_ick",  &ssi_ick_3430es1, CK_3430ES1),
      CLK(NULL,   "ssi_ick",  &ssi_ick_3430es2, CK_3430ES2),
      CLK(NULL,   "usb_l4_ick",     &usb_l4_ick,      CK_3430ES1),
      CLK(NULL,   "security_l4_ick2", &security_l4_ick2, CK_343X),
      CLK(NULL,   "aes1_ick", &aes1_ick,  CK_343X),
      CLK("omap_rng",   "ick",            &rng_ick,   CK_343X),
      CLK(NULL,   "sha11_ick",      &sha11_ick, CK_343X),
      CLK(NULL,   "des1_ick", &des1_ick,  CK_343X),
      CLK("omapfb",     "dss1_fck", &dss1_alwon_fck_3430es1, CK_3430ES1),
      CLK("omapfb",     "dss1_fck", &dss1_alwon_fck_3430es2, CK_3430ES2),
      CLK("omapfb",     "tv_fck",   &dss_tv_fck,      CK_343X),
      CLK("omapfb",     "video_fck",      &dss_96m_fck,     CK_343X),
      CLK("omapfb",     "dss2_fck", &dss2_alwon_fck, CK_343X),
      CLK("omapfb",     "ick",            &dss_ick_3430es1, CK_3430ES1),
      CLK("omapfb",     "ick",            &dss_ick_3430es2, CK_3430ES2),
      CLK(NULL,   "cam_mclk", &cam_mclk,  CK_343X),
      CLK(NULL,   "cam_ick",  &cam_ick,   CK_343X),
      CLK(NULL,   "csi2_96m_fck",   &csi2_96m_fck,    CK_343X),
      CLK(NULL,   "usbhost_120m_fck", &usbhost_120m_fck, CK_3430ES2),
      CLK(NULL,   "usbhost_48m_fck", &usbhost_48m_fck, CK_3430ES2),
      CLK(NULL,   "usbhost_ick",    &usbhost_ick,     CK_3430ES2),
      CLK(NULL,   "usim_fck", &usim_fck,  CK_3430ES2),
      CLK(NULL,   "gpt1_fck", &gpt1_fck,  CK_343X),
      CLK(NULL,   "wkup_32k_fck",   &wkup_32k_fck,    CK_343X),
      CLK(NULL,   "gpio1_dbck",     &gpio1_dbck,      CK_343X),
      CLK("omap_wdt",   "fck",            &wdt2_fck,  CK_343X),
      CLK(NULL,   "wkup_l4_ick",    &wkup_l4_ick,     CK_343X),
      CLK(NULL,   "usim_ick", &usim_ick,  CK_3430ES2),
      CLK("omap_wdt",   "ick",            &wdt2_ick,  CK_343X),
      CLK(NULL,   "wdt1_ick", &wdt1_ick,  CK_343X),
      CLK(NULL,   "gpio1_ick",      &gpio1_ick, CK_343X),
      CLK(NULL,   "omap_32ksync_ick", &omap_32ksync_ick, CK_343X),
      CLK(NULL,   "gpt12_ick",      &gpt12_ick, CK_343X),
      CLK(NULL,   "gpt1_ick", &gpt1_ick,  CK_343X),
      CLK(NULL,   "per_96m_fck",    &per_96m_fck,     CK_343X),
      CLK(NULL,   "per_48m_fck",    &per_48m_fck,     CK_343X),
      CLK(NULL,   "uart3_fck",      &uart3_fck, CK_343X),
      CLK(NULL,   "gpt2_fck", &gpt2_fck,  CK_343X),
      CLK(NULL,   "gpt3_fck", &gpt3_fck,  CK_343X),
      CLK(NULL,   "gpt4_fck", &gpt4_fck,  CK_343X),
      CLK(NULL,   "gpt5_fck", &gpt5_fck,  CK_343X),
      CLK(NULL,   "gpt6_fck", &gpt6_fck,  CK_343X),
      CLK(NULL,   "gpt7_fck", &gpt7_fck,  CK_343X),
      CLK(NULL,   "gpt8_fck", &gpt8_fck,  CK_343X),
      CLK(NULL,   "gpt9_fck", &gpt9_fck,  CK_343X),
      CLK(NULL,   "per_32k_alwon_fck", &per_32k_alwon_fck, CK_343X),
      CLK(NULL,   "gpio6_dbck",     &gpio6_dbck,      CK_343X),
      CLK(NULL,   "gpio5_dbck",     &gpio5_dbck,      CK_343X),
      CLK(NULL,   "gpio4_dbck",     &gpio4_dbck,      CK_343X),
      CLK(NULL,   "gpio3_dbck",     &gpio3_dbck,      CK_343X),
      CLK(NULL,   "gpio2_dbck",     &gpio2_dbck,      CK_343X),
      CLK(NULL,   "wdt3_fck", &wdt3_fck,  CK_343X),
      CLK(NULL,   "per_l4_ick",     &per_l4_ick,      CK_343X),
      CLK(NULL,   "gpio6_ick",      &gpio6_ick, CK_343X),
      CLK(NULL,   "gpio5_ick",      &gpio5_ick, CK_343X),
      CLK(NULL,   "gpio4_ick",      &gpio4_ick, CK_343X),
      CLK(NULL,   "gpio3_ick",      &gpio3_ick, CK_343X),
      CLK(NULL,   "gpio2_ick",      &gpio2_ick, CK_343X),
      CLK(NULL,   "wdt3_ick", &wdt3_ick,  CK_343X),
      CLK(NULL,   "uart3_ick",      &uart3_ick, CK_343X),
      CLK(NULL,   "gpt9_ick", &gpt9_ick,  CK_343X),
      CLK(NULL,   "gpt8_ick", &gpt8_ick,  CK_343X),
      CLK(NULL,   "gpt7_ick", &gpt7_ick,  CK_343X),
      CLK(NULL,   "gpt6_ick", &gpt6_ick,  CK_343X),
      CLK(NULL,   "gpt5_ick", &gpt5_ick,  CK_343X),
      CLK(NULL,   "gpt4_ick", &gpt4_ick,  CK_343X),
      CLK(NULL,   "gpt3_ick", &gpt3_ick,  CK_343X),
      CLK(NULL,   "gpt2_ick", &gpt2_ick,  CK_343X),
      CLK("omap-mcbsp.2", "ick",    &mcbsp2_ick,      CK_343X),
      CLK("omap-mcbsp.3", "ick",    &mcbsp3_ick,      CK_343X),
      CLK("omap-mcbsp.4", "ick",    &mcbsp4_ick,      CK_343X),
      CLK("omap-mcbsp.2", "fck",    &mcbsp2_fck,      CK_343X),
      CLK("omap-mcbsp.3", "fck",    &mcbsp3_fck,      CK_343X),
      CLK("omap-mcbsp.4", "fck",    &mcbsp4_fck,      CK_343X),
      CLK(NULL,   "emu_src_ck",     &emu_src_ck,      CK_343X),
      CLK(NULL,   "pclk_fck", &pclk_fck,  CK_343X),
      CLK(NULL,   "pclkx2_fck",     &pclkx2_fck,      CK_343X),
      CLK(NULL,   "atclk_fck",      &atclk_fck, CK_343X),
      CLK(NULL,   "traceclk_src_fck", &traceclk_src_fck, CK_343X),
      CLK(NULL,   "traceclk_fck",   &traceclk_fck,    CK_343X),
      CLK(NULL,   "sr1_fck",  &sr1_fck,   CK_343X),
      CLK(NULL,   "sr2_fck",  &sr2_fck,   CK_343X),
      CLK(NULL,   "sr_l4_ick",      &sr_l4_ick, CK_343X),
      CLK(NULL,   "secure_32k_fck", &secure_32k_fck, CK_343X),
      CLK(NULL,   "gpt12_fck",      &gpt12_fck, CK_343X),
      CLK(NULL,   "wdt1_fck", &wdt1_fck,  CK_343X),
};

/* CM_AUTOIDLE_PLL*.AUTO_* bit values */
#define DPLL_AUTOIDLE_DISABLE             0x0
#define DPLL_AUTOIDLE_LOW_POWER_STOP            0x1

#define MAX_DPLL_WAIT_TRIES         1000000

#define MIN_SDRC_DLL_LOCK_FREQ            83000000

#define CYCLES_PER_MHZ              1000000

/* Scale factor for fixed-point arith in omap3_core_dpll_m2_set_rate() */
#define SDRC_MPURATE_SCALE          8

/* 2^SDRC_MPURATE_BASE_SHIFT: MPU MHz that SDRC_MPURATE_LOOPS is defined for */
#define SDRC_MPURATE_BASE_SHIFT           9

/*
 * SDRC_MPURATE_LOOPS: Number of MPU loops to execute at
 * 2^MPURATE_BASE_SHIFT MHz for SDRC to stabilize
 */
#define SDRC_MPURATE_LOOPS          96

/*
 * DPLL5_FREQ_FOR_USBHOST: USBHOST and USBTLL are the only clocks
 * that are sourced by DPLL5, and both of these require this clock
 * to be at 120 MHz for proper operation.
 */
#define DPLL5_FREQ_FOR_USBHOST            120000000

/**
 * omap3430es2_clk_ssi_find_idlest - return CM_IDLEST info for SSI
 * @clk: struct clk * being enabled
 * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into
 * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into
 *
 * The OMAP3430ES2 SSI target CM_IDLEST bit is at a different shift
 * from the CM_{I,F}CLKEN bit.  Pass back the correct info via
 * @idlest_reg and @idlest_bit.  No return value.
 */
static void omap3430es2_clk_ssi_find_idlest(struct clk *clk,
                                  void __iomem **idlest_reg,
                                  u8 *idlest_bit)
{
      u32 r;

      r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20);
      *idlest_reg = (__force void __iomem *)r;
      *idlest_bit = OMAP3430ES2_ST_SSI_IDLE_SHIFT;
}

/**
 * omap3430es2_clk_dss_usbhost_find_idlest - CM_IDLEST info for DSS, USBHOST
 * @clk: struct clk * being enabled
 * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into
 * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into
 *
 * Some OMAP modules on OMAP3 ES2+ chips have both initiator and
 * target IDLEST bits.  For our purposes, we are concerned with the
 * target IDLEST bits, which exist at a different bit position than
 * the *CLKEN bit position for these modules (DSS and USBHOST) (The
 * default find_idlest code assumes that they are at the same
 * position.)  No return value.
 */
static void omap3430es2_clk_dss_usbhost_find_idlest(struct clk *clk,
                                        void __iomem **idlest_reg,
                                        u8 *idlest_bit)
{
      u32 r;

      r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20);
      *idlest_reg = (__force void __iomem *)r;
      /* USBHOST_IDLE has same shift */
      *idlest_bit = OMAP3430ES2_ST_DSS_IDLE_SHIFT;
}

/**
 * omap3430es2_clk_hsotgusb_find_idlest - return CM_IDLEST info for HSOTGUSB
 * @clk: struct clk * being enabled
 * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into
 * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into
 *
 * The OMAP3430ES2 HSOTGUSB target CM_IDLEST bit is at a different
 * shift from the CM_{I,F}CLKEN bit.  Pass back the correct info via
 * @idlest_reg and @idlest_bit.  No return value.
 */
static void omap3430es2_clk_hsotgusb_find_idlest(struct clk *clk,
                                     void __iomem **idlest_reg,
                                     u8 *idlest_bit)
{
      u32 r;

      r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20);
      *idlest_reg = (__force void __iomem *)r;
      *idlest_bit = OMAP3430ES2_ST_HSOTGUSB_IDLE_SHIFT;
}

/**
 * omap3_dpll_recalc - recalculate DPLL rate
 * @clk: DPLL struct clk
 *
 * Recalculate and propagate the DPLL rate.
 */
static unsigned long omap3_dpll_recalc(struct clk *clk)
{
      return omap2_get_dpll_rate(clk);
}

/* _omap3_dpll_write_clken - write clken_bits arg to a DPLL's enable bits */
static void _omap3_dpll_write_clken(struct clk *clk, u8 clken_bits)
{
      const struct dpll_data *dd;
      u32 v;

      dd = clk->dpll_data;

      v = __raw_readl(dd->control_reg);
      v &= ~dd->enable_mask;
      v |= clken_bits << __ffs(dd->enable_mask);
      __raw_writel(v, dd->control_reg);
}

/* _omap3_wait_dpll_status: wait for a DPLL to enter a specific state */
static int _omap3_wait_dpll_status(struct clk *clk, u8 state)
{
      const struct dpll_data *dd;
      int i = 0;
      int ret = -EINVAL;

      dd = clk->dpll_data;

      state <<= __ffs(dd->idlest_mask);

      while (((__raw_readl(dd->idlest_reg) & dd->idlest_mask) != state) &&
             i < MAX_DPLL_WAIT_TRIES) {
            i++;
            udelay(1);
      }

      if (i == MAX_DPLL_WAIT_TRIES) {
            printk(KERN_ERR "clock: %s failed transition to '%s'\n",
                   clk->name, (state) ? "locked" : "bypassed");
      } else {
            pr_debug("clock: %s transition to '%s' in %d loops\n",
                   clk->name, (state) ? "locked" : "bypassed", i);

            ret = 0;
      }

      return ret;
}

/* From 3430 TRM ES2 4.7.6.2 */
static u16 _omap3_dpll_compute_freqsel(struct clk *clk, u8 n)
{
      unsigned long fint;
      u16 f = 0;

      fint = clk->dpll_data->clk_ref->rate / n;

      pr_debug("clock: fint is %lu\n", fint);

      if (fint >= 750000 && fint <= 1000000)
            f = 0x3;
      else if (fint > 1000000 && fint <= 1250000)
            f = 0x4;
      else if (fint > 1250000 && fint <= 1500000)
            f = 0x5;
      else if (fint > 1500000 && fint <= 1750000)
            f = 0x6;
      else if (fint > 1750000 && fint <= 2100000)
            f = 0x7;
      else if (fint > 7500000 && fint <= 10000000)
            f = 0xB;
      else if (fint > 10000000 && fint <= 12500000)
            f = 0xC;
      else if (fint > 12500000 && fint <= 15000000)
            f = 0xD;
      else if (fint > 15000000 && fint <= 17500000)
            f = 0xE;
      else if (fint > 17500000 && fint <= 21000000)
            f = 0xF;
      else
            pr_debug("clock: unknown freqsel setting for %d\n", n);

      return f;
}

/* Non-CORE DPLL (e.g., DPLLs that do not control SDRC) clock functions */

/*
 * _omap3_noncore_dpll_lock - instruct a DPLL to lock and wait for readiness
 * @clk: pointer to a DPLL struct clk
 *
 * Instructs a non-CORE DPLL to lock.  Waits for the DPLL to report
 * readiness before returning.  Will save and restore the DPLL's
 * autoidle state across the enable, per the CDP code.  If the DPLL
 * locked successfully, return 0; if the DPLL did not lock in the time
 * allotted, or DPLL3 was passed in, return -EINVAL.
 */
static int _omap3_noncore_dpll_lock(struct clk *clk)
{
      u8 ai;
      int r;

      if (clk == &dpll3_ck)
            return -EINVAL;

      pr_debug("clock: locking DPLL %s\n", clk->name);

      ai = omap3_dpll_autoidle_read(clk);

      omap3_dpll_deny_idle(clk);

      _omap3_dpll_write_clken(clk, DPLL_LOCKED);

      r = _omap3_wait_dpll_status(clk, 1);

      if (ai)
            omap3_dpll_allow_idle(clk);

      return r;
}

/*
 * _omap3_noncore_dpll_bypass - instruct a DPLL to bypass and wait for readiness
 * @clk: pointer to a DPLL struct clk
 *
 * Instructs a non-CORE DPLL to enter low-power bypass mode.  In
 * bypass mode, the DPLL's rate is set equal to its parent clock's
 * rate.  Waits for the DPLL to report readiness before returning.
 * Will save and restore the DPLL's autoidle state across the enable,
 * per the CDP code.  If the DPLL entered bypass mode successfully,
 * return 0; if the DPLL did not enter bypass in the time allotted, or
 * DPLL3 was passed in, or the DPLL does not support low-power bypass,
 * return -EINVAL.
 */
static int _omap3_noncore_dpll_bypass(struct clk *clk)
{
      int r;
      u8 ai;

      if (clk == &dpll3_ck)
            return -EINVAL;

      if (!(clk->dpll_data->modes & (1 << DPLL_LOW_POWER_BYPASS)))
            return -EINVAL;

      pr_debug("clock: configuring DPLL %s for low-power bypass\n",
             clk->name);

      ai = omap3_dpll_autoidle_read(clk);

      _omap3_dpll_write_clken(clk, DPLL_LOW_POWER_BYPASS);

      r = _omap3_wait_dpll_status(clk, 0);

      if (ai)
            omap3_dpll_allow_idle(clk);
      else
            omap3_dpll_deny_idle(clk);

      return r;
}

/*
 * _omap3_noncore_dpll_stop - instruct a DPLL to stop
 * @clk: pointer to a DPLL struct clk
 *
 * Instructs a non-CORE DPLL to enter low-power stop. Will save and
 * restore the DPLL's autoidle state across the stop, per the CDP
 * code.  If DPLL3 was passed in, or the DPLL does not support
 * low-power stop, return -EINVAL; otherwise, return 0.
 */
static int _omap3_noncore_dpll_stop(struct clk *clk)
{
      u8 ai;

      if (clk == &dpll3_ck)
            return -EINVAL;

      if (!(clk->dpll_data->modes & (1 << DPLL_LOW_POWER_STOP)))
            return -EINVAL;

      pr_debug("clock: stopping DPLL %s\n", clk->name);

      ai = omap3_dpll_autoidle_read(clk);

      _omap3_dpll_write_clken(clk, DPLL_LOW_POWER_STOP);

      if (ai)
            omap3_dpll_allow_idle(clk);
      else
            omap3_dpll_deny_idle(clk);

      return 0;
}

/**
 * omap3_noncore_dpll_enable - instruct a DPLL to enter bypass or lock mode
 * @clk: pointer to a DPLL struct clk
 *
 * Instructs a non-CORE DPLL to enable, e.g., to enter bypass or lock.
 * The choice of modes depends on the DPLL's programmed rate: if it is
 * the same as the DPLL's parent clock, it will enter bypass;
 * otherwise, it will enter lock.  This code will wait for the DPLL to
 * indicate readiness before returning, unless the DPLL takes too long
 * to enter the target state.  Intended to be used as the struct clk's
 * enable function.  If DPLL3 was passed in, or the DPLL does not
 * support low-power stop, or if the DPLL took too long to enter
 * bypass or lock, return -EINVAL; otherwise, return 0.
 */
static int omap3_noncore_dpll_enable(struct clk *clk)
{
      int r;
      struct dpll_data *dd;

      if (clk == &dpll3_ck)
            return -EINVAL;

      dd = clk->dpll_data;
      if (!dd)
            return -EINVAL;

      if (clk->rate == dd->clk_bypass->rate) {
            WARN_ON(clk->parent != dd->clk_bypass);
            r = _omap3_noncore_dpll_bypass(clk);
      } else {
            WARN_ON(clk->parent != dd->clk_ref);
            r = _omap3_noncore_dpll_lock(clk);
      }
      /* FIXME: this is dubious - if clk->rate has changed, what about propagating? */
      if (!r)
            clk->rate = omap2_get_dpll_rate(clk);

      return r;
}

/**
 * omap3_noncore_dpll_enable - instruct a DPLL to enter bypass or lock mode
 * @clk: pointer to a DPLL struct clk
 *
 * Instructs a non-CORE DPLL to enable, e.g., to enter bypass or lock.
 * The choice of modes depends on the DPLL's programmed rate: if it is
 * the same as the DPLL's parent clock, it will enter bypass;
 * otherwise, it will enter lock.  This code will wait for the DPLL to
 * indicate readiness before returning, unless the DPLL takes too long
 * to enter the target state.  Intended to be used as the struct clk's
 * enable function.  If DPLL3 was passed in, or the DPLL does not
 * support low-power stop, or if the DPLL took too long to enter
 * bypass or lock, return -EINVAL; otherwise, return 0.
 */
static void omap3_noncore_dpll_disable(struct clk *clk)
{
      if (clk == &dpll3_ck)
            return;

      _omap3_noncore_dpll_stop(clk);
}


/* Non-CORE DPLL rate set code */

/*
 * omap3_noncore_dpll_program - set non-core DPLL M,N values directly
 * @clk: struct clk * of DPLL to set
 * @m: DPLL multiplier to set
 * @n: DPLL divider to set
 * @freqsel: FREQSEL value to set
 *
 * Program the DPLL with the supplied M, N values, and wait for the DPLL to
 * lock..  Returns -EINVAL upon error, or 0 upon success.
 */
static int omap3_noncore_dpll_program(struct clk *clk, u16 m, u8 n, u16 freqsel)
{
      struct dpll_data *dd = clk->dpll_data;
      u32 v;

      /* 3430 ES2 TRM: 4.7.6.9 DPLL Programming Sequence */
      _omap3_noncore_dpll_bypass(clk);

      /* Set jitter correction */
      v = __raw_readl(dd->control_reg);
      v &= ~dd->freqsel_mask;
      v |= freqsel << __ffs(dd->freqsel_mask);
      __raw_writel(v, dd->control_reg);

      /* Set DPLL multiplier, divider */
      v = __raw_readl(dd->mult_div1_reg);
      v &= ~(dd->mult_mask | dd->div1_mask);
      v |= m << __ffs(dd->mult_mask);
      v |= (n - 1) << __ffs(dd->div1_mask);
      __raw_writel(v, dd->mult_div1_reg);

      /* We let the clock framework set the other output dividers later */

      /* REVISIT: Set ramp-up delay? */

      _omap3_noncore_dpll_lock(clk);

      return 0;
}

/**
 * omap3_noncore_dpll_set_rate - set non-core DPLL rate
 * @clk: struct clk * of DPLL to set
 * @rate: rounded target rate
 *
 * Set the DPLL CLKOUT to the target rate.  If the DPLL can enter
 * low-power bypass, and the target rate is the bypass source clock
 * rate, then configure the DPLL for bypass.  Otherwise, round the
 * target rate if it hasn't been done already, then program and lock
 * the DPLL.  Returns -EINVAL upon error, or 0 upon success.
 */
static int omap3_noncore_dpll_set_rate(struct clk *clk, unsigned long rate)
{
      struct clk *new_parent = NULL;
      u16 freqsel;
      struct dpll_data *dd;
      int ret;

      if (!clk || !rate)
            return -EINVAL;

      dd = clk->dpll_data;
      if (!dd)
            return -EINVAL;

      if (rate == omap2_get_dpll_rate(clk))
            return 0;

      /*
       * Ensure both the bypass and ref clocks are enabled prior to
       * doing anything; we need the bypass clock running to reprogram
       * the DPLL.
       */
      omap2_clk_enable(dd->clk_bypass);
      omap2_clk_enable(dd->clk_ref);

      if (dd->clk_bypass->rate == rate &&
          (clk->dpll_data->modes & (1 << DPLL_LOW_POWER_BYPASS))) {
            pr_debug("clock: %s: set rate: entering bypass.\n", clk->name);

            ret = _omap3_noncore_dpll_bypass(clk);
            if (!ret)
                  new_parent = dd->clk_bypass;
      } else {
            if (dd->last_rounded_rate != rate)
                  omap2_dpll_round_rate(clk, rate);

            if (dd->last_rounded_rate == 0)
                  return -EINVAL;

            freqsel = _omap3_dpll_compute_freqsel(clk, dd->last_rounded_n);
            if (!freqsel)
                  WARN_ON(1);

            pr_debug("clock: %s: set rate: locking rate to %lu.\n",
                   clk->name, rate);

            ret = omap3_noncore_dpll_program(clk, dd->last_rounded_m,
                                     dd->last_rounded_n, freqsel);
            if (!ret)
                  new_parent = dd->clk_ref;
      }
      if (!ret) {
            /*
             * Switch the parent clock in the heirarchy, and make sure
             * that the new parent's usecount is correct.  Note: we
             * enable the new parent before disabling the old to avoid
             * any unnecessary hardware disable->enable transitions.
             */
            if (clk->usecount) {
                  omap2_clk_enable(new_parent);
                  omap2_clk_disable(clk->parent);
            }
            clk_reparent(clk, new_parent);
            clk->rate = rate;
      }
      omap2_clk_disable(dd->clk_ref);
      omap2_clk_disable(dd->clk_bypass);

      return 0;
}

static int omap3_dpll4_set_rate(struct clk *clk, unsigned long rate)
{
      /*
       * According to the 12-5 CDP code from TI, "Limitation 2.5"
       * on 3430ES1 prevents us from changing DPLL multipliers or dividers
       * on DPLL4.
       */
      if (omap_rev() == OMAP3430_REV_ES1_0) {
            printk(KERN_ERR "clock: DPLL4 cannot change rate due to "
                   "silicon 'Limitation 2.5' on 3430ES1.\n");
            return -EINVAL;
      }
      return omap3_noncore_dpll_set_rate(clk, rate);
}


/*
 * CORE DPLL (DPLL3) rate programming functions
 *
 * These call into SRAM code to do the actual CM writes, since the SDRAM
 * is clocked from DPLL3.
 */

/**
 * omap3_core_dpll_m2_set_rate - set CORE DPLL M2 divider
 * @clk: struct clk * of DPLL to set
 * @rate: rounded target rate
 *
 * Program the DPLL M2 divider with the rounded target rate.  Returns
 * -EINVAL upon error, or 0 upon success.
 */
static int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate)
{
      u32 new_div = 0;
      u32 unlock_dll = 0;
      u32 c;
      unsigned long validrate, sdrcrate, mpurate;
      struct omap_sdrc_params *sdrc_cs0;
      struct omap_sdrc_params *sdrc_cs1;
      int ret;

      if (!clk || !rate)
            return -EINVAL;

      if (clk != &dpll3_m2_ck)
            return -EINVAL;

      validrate = omap2_clksel_round_rate_div(clk, rate, &new_div);
      if (validrate != rate)
            return -EINVAL;

      sdrcrate = sdrc_ick.rate;
      if (rate > clk->rate)
            sdrcrate <<= ((rate / clk->rate) >> 1);
      else
            sdrcrate >>= ((clk->rate / rate) >> 1);

      ret = omap2_sdrc_get_params(sdrcrate, &sdrc_cs0, &sdrc_cs1);
      if (ret)
            return -EINVAL;

      if (sdrcrate < MIN_SDRC_DLL_LOCK_FREQ) {
            pr_debug("clock: will unlock SDRC DLL\n");
            unlock_dll = 1;
      }

      /*
       * XXX This only needs to be done when the CPU frequency changes
       */
      mpurate = arm_fck.rate / CYCLES_PER_MHZ;
      c = (mpurate << SDRC_MPURATE_SCALE) >> SDRC_MPURATE_BASE_SHIFT;
      c += 1;  /* for safety */
      c *= SDRC_MPURATE_LOOPS;
      c >>= SDRC_MPURATE_SCALE;
      if (c == 0)
            c = 1;

      pr_debug("clock: changing CORE DPLL rate from %lu to %lu\n", clk->rate,
             validrate);
      pr_debug("clock: SDRC CS0 timing params used:"
             " RFR %08x CTRLA %08x CTRLB %08x MR %08x\n",
             sdrc_cs0->rfr_ctrl, sdrc_cs0->actim_ctrla,
             sdrc_cs0->actim_ctrlb, sdrc_cs0->mr);
      if (sdrc_cs1)
            pr_debug("clock: SDRC CS1 timing params used: "
             " RFR %08x CTRLA %08x CTRLB %08x MR %08x\n",
             sdrc_cs1->rfr_ctrl, sdrc_cs1->actim_ctrla,
             sdrc_cs1->actim_ctrlb, sdrc_cs1->mr);

      if (sdrc_cs1)
            omap3_configure_core_dpll(
                          new_div, unlock_dll, c, rate > clk->rate,
                          sdrc_cs0->rfr_ctrl, sdrc_cs0->actim_ctrla,
                          sdrc_cs0->actim_ctrlb, sdrc_cs0->mr,
                          sdrc_cs1->rfr_ctrl, sdrc_cs1->actim_ctrla,
                          sdrc_cs1->actim_ctrlb, sdrc_cs1->mr);
      else
            omap3_configure_core_dpll(
                          new_div, unlock_dll, c, rate > clk->rate,
                          sdrc_cs0->rfr_ctrl, sdrc_cs0->actim_ctrla,
                          sdrc_cs0->actim_ctrlb, sdrc_cs0->mr,
                          0, 0, 0, 0);

      return 0;
}


static const struct clkops clkops_noncore_dpll_ops = {
      .enable           = &omap3_noncore_dpll_enable,
      .disable    = &omap3_noncore_dpll_disable,
};

/* DPLL autoidle read/set code */


/**
 * omap3_dpll_autoidle_read - read a DPLL's autoidle bits
 * @clk: struct clk * of the DPLL to read
 *
 * Return the DPLL's autoidle bits, shifted down to bit 0.  Returns
 * -EINVAL if passed a null pointer or if the struct clk does not
 * appear to refer to a DPLL.
 */
static u32 omap3_dpll_autoidle_read(struct clk *clk)
{
      const struct dpll_data *dd;
      u32 v;

      if (!clk || !clk->dpll_data)
            return -EINVAL;

      dd = clk->dpll_data;

      v = __raw_readl(dd->autoidle_reg);
      v &= dd->autoidle_mask;
      v >>= __ffs(dd->autoidle_mask);

      return v;
}

/**
 * omap3_dpll_allow_idle - enable DPLL autoidle bits
 * @clk: struct clk * of the DPLL to operate on
 *
 * Enable DPLL automatic idle control.  This automatic idle mode
 * switching takes effect only when the DPLL is locked, at least on
 * OMAP3430.  The DPLL will enter low-power stop when its downstream
 * clocks are gated.  No return value.
 */
static void omap3_dpll_allow_idle(struct clk *clk)
{
      const struct dpll_data *dd;
      u32 v;

      if (!clk || !clk->dpll_data)
            return;

      dd = clk->dpll_data;

      /*
       * REVISIT: CORE DPLL can optionally enter low-power bypass
       * by writing 0x5 instead of 0x1.  Add some mechanism to
       * optionally enter this mode.
       */
      v = __raw_readl(dd->autoidle_reg);
      v &= ~dd->autoidle_mask;
      v |= DPLL_AUTOIDLE_LOW_POWER_STOP << __ffs(dd->autoidle_mask);
      __raw_writel(v, dd->autoidle_reg);
}

/**
 * omap3_dpll_deny_idle - prevent DPLL from automatically idling
 * @clk: struct clk * of the DPLL to operate on
 *
 * Disable DPLL automatic idle control.  No return value.
 */
static void omap3_dpll_deny_idle(struct clk *clk)
{
      const struct dpll_data *dd;
      u32 v;

      if (!clk || !clk->dpll_data)
            return;

      dd = clk->dpll_data;

      v = __raw_readl(dd->autoidle_reg);
      v &= ~dd->autoidle_mask;
      v |= DPLL_AUTOIDLE_DISABLE << __ffs(dd->autoidle_mask);
      __raw_writel(v, dd->autoidle_reg);
}

/* Clock control for DPLL outputs */

/**
 * omap3_clkoutx2_recalc - recalculate DPLL X2 output virtual clock rate
 * @clk: DPLL output struct clk
 *
 * Using parent clock DPLL data, look up DPLL state.  If locked, set our
 * rate to the dpll_clk * 2; otherwise, just use dpll_clk.
 */
static unsigned long omap3_clkoutx2_recalc(struct clk *clk)
{
      const struct dpll_data *dd;
      unsigned long rate;
      u32 v;
      struct clk *pclk;

      /* Walk up the parents of clk, looking for a DPLL */
      pclk = clk->parent;
      while (pclk && !pclk->dpll_data)
            pclk = pclk->parent;

      /* clk does not have a DPLL as a parent? */
      WARN_ON(!pclk);

      dd = pclk->dpll_data;

      WARN_ON(!dd->enable_mask);

      v = __raw_readl(dd->control_reg) & dd->enable_mask;
      v >>= __ffs(dd->enable_mask);
      if (v != OMAP3XXX_EN_DPLL_LOCKED)
            rate = clk->parent->rate;
      else
            rate = clk->parent->rate * 2;
      return rate;
}

/* Common clock code */

/*
 * As it is structured now, this will prevent an OMAP2/3 multiboot
 * kernel from compiling.  This will need further attention.
 */
#if defined(CONFIG_ARCH_OMAP3)

static struct clk_functions omap2_clk_functions = {
      .clk_enable       = omap2_clk_enable,
      .clk_disable            = omap2_clk_disable,
      .clk_round_rate         = omap2_clk_round_rate,
      .clk_set_rate           = omap2_clk_set_rate,
      .clk_set_parent         = omap2_clk_set_parent,
      .clk_disable_unused     = omap2_clk_disable_unused,
};

/*
 * Set clocks for bypass mode for reboot to work.
 */
void omap2_clk_prepare_for_reboot(void)
{
      /* REVISIT: Not ready for 343x */
#if 0
      u32 rate;

      if (vclk == NULL || sclk == NULL)
            return;

      rate = clk_get_rate(sclk);
      clk_set_rate(vclk, rate);
#endif
}

static void omap3_clk_lock_dpll5(void)
{
      struct clk *dpll5_clk;
      struct clk *dpll5_m2_clk;

      dpll5_clk = clk_get(NULL, "dpll5_ck");
      clk_set_rate(dpll5_clk, DPLL5_FREQ_FOR_USBHOST);
      clk_enable(dpll5_clk);

      /* Enable autoidle to allow it to enter low power bypass */
      omap3_dpll_allow_idle(dpll5_clk);

      /* Program dpll5_m2_clk divider for no division */
      dpll5_m2_clk = clk_get(NULL, "dpll5_m2_ck");
      clk_enable(dpll5_m2_clk);
      clk_set_rate(dpll5_m2_clk, DPLL5_FREQ_FOR_USBHOST);

      clk_disable(dpll5_m2_clk);
      clk_disable(dpll5_clk);
      return;
}

/* REVISIT: Move this init stuff out into clock.c */

/*
 * Switch the MPU rate if specified on cmdline.
 * We cannot do this early until cmdline is parsed.
 */
static int __init omap2_clk_arch_init(void)
{
      if (!mpurate)
            return -EINVAL;

      /* REVISIT: not yet ready for 343x */
      if (clk_set_rate(&dpll1_ck, mpurate))
            printk(KERN_ERR "*** Unable to set MPU rate\n");

      recalculate_root_clocks();

      printk(KERN_INFO "Switched to new clocking rate (Crystal/Core/MPU): "
             "%ld.%01ld/%ld/%ld MHz\n",
             (osc_sys_ck.rate / 1000000), ((osc_sys_ck.rate / 100000) % 10),
             (core_ck.rate / 1000000), (arm_fck.rate / 1000000)) ;

      calibrate_delay();

      return 0;
}
arch_initcall(omap2_clk_arch_init);

int __init omap2_clk_init(void)
{
      /* struct prcm_config *prcm; */
      struct omap_clk *c;
      /* u32 clkrate; */
      u32 cpu_clkflg;

      if (cpu_is_omap34xx()) {
            cpu_mask = RATE_IN_343X;
            cpu_clkflg = CK_343X;

            /*
             * Update this if there are further clock changes between ES2
             * and production parts
             */
            if (omap_rev() == OMAP3430_REV_ES1_0) {
                  /* No 3430ES1-only rates exist, so no RATE_IN_3430ES1 */
                  cpu_clkflg |= CK_3430ES1;
            } else {
                  cpu_mask |= RATE_IN_3430ES2;
                  cpu_clkflg |= CK_3430ES2;
            }
      }

      clk_init(&omap2_clk_functions);

      for (c = omap34xx_clks; c < omap34xx_clks + ARRAY_SIZE(omap34xx_clks); c++)
            clk_preinit(c->lk.clk);

      for (c = omap34xx_clks; c < omap34xx_clks + ARRAY_SIZE(omap34xx_clks); c++)
            if (c->cpu & cpu_clkflg) {
                  clkdev_add(&c->lk);
                  clk_register(c->lk.clk);
                  omap2_init_clk_clkdm(c->lk.clk);
            }

      /* REVISIT: Not yet ready for OMAP3 */
#if 0
      /* Check the MPU rate set by bootloader */
      clkrate = omap2_get_dpll_rate_24xx(&dpll_ck);
      for (prcm = rate_table; prcm->mpu_speed; prcm++) {
            if (!(prcm->flags & cpu_mask))
                  continue;
            if (prcm->xtal_speed != sys_ck.rate)
                  continue;
            if (prcm->dpll_speed <= clkrate)
                   break;
      }
      curr_prcm_set = prcm;
#endif

      recalculate_root_clocks();

      printk(KERN_INFO "Clocking rate (Crystal/Core/MPU): "
             "%ld.%01ld/%ld/%ld MHz\n",
             (osc_sys_ck.rate / 1000000), (osc_sys_ck.rate / 100000) % 10,
             (core_ck.rate / 1000000), (arm_fck.rate / 1000000));

      /*
       * Only enable those clocks we will need, let the drivers
       * enable other clocks as necessary
       */
      clk_enable_init_clocks();

      /*
       * Lock DPLL5 and put it in autoidle.
       */
      if (omap_rev() >= OMAP3430_REV_ES2_0)
            omap3_clk_lock_dpll5();

      /* Avoid sleeping during omap2_clk_prepare_for_reboot() */
      /* REVISIT: not yet ready for 343x */
#if 0
      vclk = clk_get(NULL, "virt_prcm_set");
      sclk = clk_get(NULL, "sys_ck");
#endif
      return 0;
}

#endif

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