Archipelago » qemu

/*

 * OMAP clocks.

 *

 * Copyright (C) 2006-2007 Andrzej Zaborowski  <balrog@zabor.org>

 *

 * Clocks data comes in part from arch/arm/mach-omap1/clock.h in Linux.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License as

 * published by the Free Software Foundation; either version 2 of

 * the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,

 * MA 02111-1307 USA

 */

#include "vl.h"

struct clk {

    const char *name;

    const char *alias;

    struct clk *parent;

    struct clk *child1;

    struct clk *sibling;

#define ALWAYS_ENABLED                (1 << 0)

#define CLOCK_IN_OMAP310        (1 << 10)

#define CLOCK_IN_OMAP730        (1 << 11)

#define CLOCK_IN_OMAP1510        (1 << 12)

#define CLOCK_IN_OMAP16XX        (1 << 13)

    uint32_t flags;

    int id;

    int running;                /* Is currently ticking */

    int enabled;                /* Is enabled, regardless of its input clk */

    unsigned long rate;                /* Current rate (if .running) */

    unsigned int divisor;        /* Rate relative to input (if .enabled) */

    unsigned int multiplier;        /* Rate relative to input (if .enabled) */

    qemu_irq users[16];                /* Who to notify on change */

    int usecount;                /* Automatically idle when unused */

};

static struct clk xtal_osc12m = {

    .name        = "xtal_osc_12m",

    .rate        = 12000000,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310,

};

static struct clk xtal_osc32k = {

    .name        = "xtal_osc_32k",

    .rate        = 32768,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310,

};

static struct clk ck_ref = {

    .name        = "ck_ref",

    .alias        = "clkin",

    .parent        = &xtal_osc12m,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310 |

            ALWAYS_ENABLED,

};

/* If a dpll is disabled it becomes a bypass, child clocks don't stop */

static struct clk dpll1 = {

    .name        = "dpll1",

    .parent        = &ck_ref,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310 |

            ALWAYS_ENABLED,

};

static struct clk dpll2 = {

    .name        = "dpll2",

    .parent        = &ck_ref,

    .flags        = CLOCK_IN_OMAP310 | ALWAYS_ENABLED,

};

static struct clk dpll3 = {

    .name        = "dpll3",

    .parent        = &ck_ref,

    .flags        = CLOCK_IN_OMAP310 | ALWAYS_ENABLED,

};

static struct clk dpll4 = {

    .name        = "dpll4",

    .parent        = &ck_ref,

    .multiplier        = 4,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310,

};

static struct clk apll = {

    .name        = "apll",

    .parent        = &ck_ref,

    .multiplier        = 48,

    .divisor        = 12,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310,

};

static struct clk ck_48m = {

    .name        = "ck_48m",

    .parent        = &dpll4,        /* either dpll4 or apll */

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310,

};

static struct clk ck_dpll1out = {

    .name        = "ck_dpll1out",

    .parent        = &dpll1,

    .flags        = CLOCK_IN_OMAP16XX,

};

static struct clk sossi_ck = {

    .name        = "ck_sossi",

    .parent        = &ck_dpll1out,

    .flags        = CLOCK_IN_OMAP16XX,

};

static struct clk clkm1 = {

    .name        = "clkm1",

    .alias        = "ck_gen1",

    .parent        = &dpll1,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310 |

            ALWAYS_ENABLED,

};

static struct clk clkm2 = {

    .name        = "clkm2",

    .alias        = "ck_gen2",

    .parent        = &dpll1,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310 |

            ALWAYS_ENABLED,

};

static struct clk clkm3 = {

    .name        = "clkm3",

    .alias        = "ck_gen3",

    .parent        = &dpll1,        /* either dpll1 or ck_ref */

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310 |

            ALWAYS_ENABLED,

};

static struct clk arm_ck = {

    .name        = "arm_ck",

    .alias        = "mpu_ck",

    .parent        = &clkm1,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310 |

            ALWAYS_ENABLED,

};

static struct clk armper_ck = {

    .name        = "armper_ck",

    .alias        = "mpuper_ck",

    .parent        = &clkm1,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310,

};

static struct clk arm_gpio_ck = {

    .name        = "arm_gpio_ck",

    .alias        = "mpu_gpio_ck",

    .parent        = &clkm1,

    .divisor        = 1,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP310,

};

static struct clk armxor_ck = {

    .name        = "armxor_ck",

    .alias        = "mpuxor_ck",

    .parent        = &ck_ref,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310,

};

static struct clk armtim_ck = {

    .name        = "armtim_ck",

    .alias        = "mputim_ck",

    .parent        = &ck_ref,        /* either CLKIN or DPLL1 */

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310,

};

static struct clk armwdt_ck = {

    .name        = "armwdt_ck",

    .alias        = "mpuwd_ck",

    .parent        = &clkm1,

    .divisor        = 14,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310 |

            ALWAYS_ENABLED,

};

static struct clk arminth_ck16xx = {

    .name        = "arminth_ck",

    .parent        = &arm_ck,

    .flags        = CLOCK_IN_OMAP16XX | ALWAYS_ENABLED,

    /* Note: On 16xx the frequency can be divided by 2 by programming

     * ARM_CKCTL:ARM_INTHCK_SEL(14) to 1

     *

     * 1510 version is in TC clocks.

     */

};

static struct clk dsp_ck = {

    .name        = "dsp_ck",

    .parent        = &clkm2,

    .flags        = CLOCK_IN_OMAP310 | CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX,

};

static struct clk dspmmu_ck = {

    .name        = "dspmmu_ck",

    .parent        = &clkm2,

    .flags        = CLOCK_IN_OMAP310 | CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |

            ALWAYS_ENABLED,

};

static struct clk dspper_ck = {

    .name        = "dspper_ck",

    .parent        = &clkm2,

    .flags        = CLOCK_IN_OMAP310 | CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX,

};

static struct clk dspxor_ck = {

    .name        = "dspxor_ck",

    .parent        = &ck_ref,

    .flags        = CLOCK_IN_OMAP310 | CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX,

};

static struct clk dsptim_ck = {

    .name        = "dsptim_ck",

    .parent        = &ck_ref,

    .flags        = CLOCK_IN_OMAP310 | CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX,

};

static struct clk tc_ck = {

    .name        = "tc_ck",

    .parent        = &clkm3,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |

            CLOCK_IN_OMAP730 | CLOCK_IN_OMAP310 |

            ALWAYS_ENABLED,

};

static struct clk arminth_ck15xx = {

    .name        = "arminth_ck",

    .parent        = &tc_ck,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP310 | ALWAYS_ENABLED,

    /* Note: On 1510 the frequency follows TC_CK

     *

     * 16xx version is in MPU clocks.

     */

};

static struct clk tipb_ck = {

    /* No-idle controlled by "tc_ck" */

    .name        = "tipb_ck",

    .parent        = &tc_ck,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP310 | ALWAYS_ENABLED,

};

static struct clk l3_ocpi_ck = {

    /* No-idle controlled by "tc_ck" */

    .name        = "l3_ocpi_ck",

    .parent        = &tc_ck,

    .flags        = CLOCK_IN_OMAP16XX,

};

static struct clk tc1_ck = {

    .name        = "tc1_ck",

    .parent        = &tc_ck,

    .flags        = CLOCK_IN_OMAP16XX,

};

static struct clk tc2_ck = {

    .name        = "tc2_ck",

    .parent        = &tc_ck,

    .flags        = CLOCK_IN_OMAP16XX,

};

static struct clk dma_ck = {

    /* No-idle controlled by "tc_ck" */

    .name        = "dma_ck",

    .parent        = &tc_ck,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310 |

            ALWAYS_ENABLED,

};

static struct clk dma_lcdfree_ck = {

    .name        = "dma_lcdfree_ck",

    .parent        = &tc_ck,

    .flags        = CLOCK_IN_OMAP16XX | ALWAYS_ENABLED,

};

static struct clk api_ck = {

    .name        = "api_ck",

    .alias        = "mpui_ck",

    .parent        = &tc_ck,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310,

};

static struct clk lb_ck = {

    .name        = "lb_ck",

    .parent        = &tc_ck,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP310,

};

static struct clk lbfree_ck = {

    .name        = "lbfree_ck",

    .parent        = &tc_ck,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP310,

};

static struct clk rhea1_ck = {

    .name        = "rhea1_ck",

    .parent        = &tc_ck,

    .flags        = CLOCK_IN_OMAP16XX | ALWAYS_ENABLED,

};

static struct clk rhea2_ck = {

    .name        = "rhea2_ck",

    .parent        = &tc_ck,

    .flags        = CLOCK_IN_OMAP16XX | ALWAYS_ENABLED,

};

static struct clk lcd_ck_16xx = {

    .name        = "lcd_ck",

    .parent        = &clkm3,

    .flags        = CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP730,

};

static struct clk lcd_ck_1510 = {

    .name        = "lcd_ck",

    .parent        = &clkm3,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP310,

};

static struct clk uart1_1510 = {

    .name        = "uart1_ck",

    /* Direct from ULPD, no real parent */

    .parent        = &armper_ck,        /* either armper_ck or dpll4 */

    .rate        = 12000000,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP310 | ALWAYS_ENABLED,

};

static struct clk uart1_16xx = {

    .name        = "uart1_ck",

    /* Direct from ULPD, no real parent */

    .parent        = &armper_ck,

    .rate        = 48000000,

    .flags        = CLOCK_IN_OMAP16XX,

};

static struct clk uart2_ck = {

    .name        = "uart2_ck",

    /* Direct from ULPD, no real parent */

    .parent        = &armper_ck,        /* either armper_ck or dpll4 */

    .rate        = 12000000,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310 |

            ALWAYS_ENABLED,

};

static struct clk uart3_1510 = {

    .name        = "uart3_ck",

    /* Direct from ULPD, no real parent */

    .parent        = &armper_ck,/* either armper_ck or dpll4 */

    .rate        = 12000000,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP310 | ALWAYS_ENABLED,

};

static struct clk uart3_16xx = {

    .name        = "uart3_ck",

    /* Direct from ULPD, no real parent */

    .parent        = &armper_ck,

    .rate        = 48000000,

    .flags        = CLOCK_IN_OMAP16XX,

};

static struct clk usb_clk0 = {        /* 6 MHz output on W4_USB_CLK0 */

    .name        = "usb_clk0",

    .alias        = "usb.clko",

    /* Direct from ULPD, no parent */

    .rate        = 6000000,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310,

};

static struct clk usb_hhc_ck1510 = {

    .name        = "usb_hhc_ck",

    /* Direct from ULPD, no parent */

    .rate        = 48000000, /* Actually 2 clocks, 12MHz and 48MHz */

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP310,

};

static struct clk usb_hhc_ck16xx = {

    .name        = "usb_hhc_ck",

    /* Direct from ULPD, no parent */

    .rate        = 48000000,

    /* OTG_SYSCON_2.OTG_PADEN == 0 (not 1510-compatible) */

    .flags        = CLOCK_IN_OMAP16XX,

};

static struct clk usb_dc_ck = {

    .name        = "usb_dc_ck",

    /* Direct from ULPD, no parent */

    .rate        = 48000000,

    .flags        = CLOCK_IN_OMAP16XX,

};

static struct clk mclk_1510 = {

    .name        = "mclk",

    /* Direct from ULPD, no parent. May be enabled by ext hardware. */

    .rate        = 12000000,

    .flags        = CLOCK_IN_OMAP1510,

};

static struct clk bclk_310 = {

    .name        = "bt_mclk_out",        /* Alias midi_mclk_out? */

    .parent        = &armper_ck,

    .flags        = CLOCK_IN_OMAP310,

};

static struct clk mclk_310 = {

    .name        = "com_mclk_out",

    .parent        = &armper_ck,

    .flags        = CLOCK_IN_OMAP310,

};

static struct clk mclk_16xx = {

    .name        = "mclk",

    /* Direct from ULPD, no parent. May be enabled by ext hardware. */

    .flags        = CLOCK_IN_OMAP16XX,

};

static struct clk bclk_1510 = {

    .name        = "bclk",

    /* Direct from ULPD, no parent. May be enabled by ext hardware. */

    .rate        = 12000000,

    .flags        = CLOCK_IN_OMAP1510,

};

static struct clk bclk_16xx = {

    .name        = "bclk",

    /* Direct from ULPD, no parent. May be enabled by ext hardware. */

    .flags        = CLOCK_IN_OMAP16XX,

};

static struct clk mmc1_ck = {

    .name        = "mmc_ck",

    .id                = 1,

    /* Functional clock is direct from ULPD, interface clock is ARMPER */

    .parent        = &armper_ck,        /* either armper_ck or dpll4 */

    .rate        = 48000000,

    .flags        = CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP310,

};

static struct clk mmc2_ck = {

    .name        = "mmc_ck",

    .id                = 2,

    /* Functional clock is direct from ULPD, interface clock is ARMPER */

    .parent        = &armper_ck,

    .rate        = 48000000,

    .flags        = CLOCK_IN_OMAP16XX,

};

static struct clk cam_mclk = {

    .name        = "cam.mclk",

    .flags        = CLOCK_IN_OMAP310 | CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX,

    .rate        = 12000000,

};

static struct clk cam_exclk = {

    .name        = "cam.exclk",

    .flags        = CLOCK_IN_OMAP310 | CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX,

    /* Either 12M from cam.mclk or 48M from dpll4 */

    .parent        = &cam_mclk,

};

static struct clk cam_lclk = {

    .name        = "cam.lclk",

    .flags        = CLOCK_IN_OMAP310 | CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX,

};

static struct clk i2c_fck = {

    .name        = "i2c_fck",

    .id                = 1,

    .flags        = CLOCK_IN_OMAP310 | CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |

            ALWAYS_ENABLED,

    .parent        = &armxor_ck,

};

static struct clk i2c_ick = {

    .name        = "i2c_ick",

    .id                = 1,

    .flags        = CLOCK_IN_OMAP16XX | ALWAYS_ENABLED,

    .parent        = &armper_ck,

};

static struct clk clk32k = {

    .name        = "clk32-kHz",

    .flags        = CLOCK_IN_OMAP310 | CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |

            ALWAYS_ENABLED,

    .parent     = &xtal_osc32k,

};

static struct clk *onchip_clks[] = {

    /* non-ULPD clocks */

    &xtal_osc12m,

    &xtal_osc32k,

    &ck_ref,

    &dpll1,

    &dpll2,

    &dpll3,

    &dpll4,

    &apll,

    &ck_48m,

    /* CK_GEN1 clocks */

    &clkm1,

    &ck_dpll1out,

    &sossi_ck,

    &arm_ck,

    &armper_ck,

    &arm_gpio_ck,

    &armxor_ck,

    &armtim_ck,

    &armwdt_ck,

    &arminth_ck15xx,  &arminth_ck16xx,

    /* CK_GEN2 clocks */

    &clkm2,

    &dsp_ck,

    &dspmmu_ck,

    &dspper_ck,

    &dspxor_ck,

    &dsptim_ck,

    /* CK_GEN3 clocks */

    &clkm3,

    &tc_ck,

    &tipb_ck,

    &l3_ocpi_ck,

    &tc1_ck,

    &tc2_ck,

    &dma_ck,

    &dma_lcdfree_ck,

    &api_ck,

    &lb_ck,

    &lbfree_ck,

    &rhea1_ck,

    &rhea2_ck,

    &lcd_ck_16xx,

    &lcd_ck_1510,

    /* ULPD clocks */

    &uart1_1510,

    &uart1_16xx,

    &uart2_ck,

    &uart3_1510,

    &uart3_16xx,

    &usb_clk0,

    &usb_hhc_ck1510, &usb_hhc_ck16xx,

    &usb_dc_ck,

    &mclk_1510,  &mclk_16xx, &mclk_310,

    &bclk_1510,  &bclk_16xx, &bclk_310,

    &mmc1_ck,

    &mmc2_ck,

    &cam_mclk,

    &cam_exclk,

    &cam_lclk,

    &clk32k,

    /* Virtual clocks */

    &i2c_fck,

    &i2c_ick,

    0

};

void omap_clk_adduser(struct clk *clk, qemu_irq user)

{

    qemu_irq *i;

    for (i = clk->users; *i; i ++);

    *i = user;

}

/* If a clock is allowed to idle, it is disabled automatically when

 * all of clock domains using it are disabled.  */

int omap_clk_is_idle(struct clk *clk)

{

    struct clk *chld;

    if (!clk->enabled && (!clk->usecount || !(clk->flags && ALWAYS_ENABLED)))

        return 1;

    if (clk->usecount)

        return 0;

    for (chld = clk->child1; chld; chld = chld->sibling)

        if (!omap_clk_is_idle(chld))

            return 0;

    return 1;

}

struct clk *omap_findclk(struct omap_mpu_state_s *mpu, const char *name)

{

    struct clk *i;

    for (i = mpu->clks; i->name; i ++)

        if (!strcmp(i->name, name) || (i->alias && !strcmp(i->alias, name)))

            return i;

    cpu_abort(mpu->env, "%s: %s not found\n", __FUNCTION__, name);

}

void omap_clk_get(struct clk *clk)

{

    clk->usecount ++;

}

void omap_clk_put(struct clk *clk)

{

    if (!(clk->usecount --))

        cpu_abort(cpu_single_env, "%s: %s is not in use\n",

                        __FUNCTION__, clk->name);

}

static void omap_clk_update(struct clk *clk)

{

    int parent, running;

    qemu_irq *user;

    struct clk *i;

    if (clk->parent)

        parent = clk->parent->running;

    else

        parent = 1;

    running = parent && (clk->enabled ||

                    ((clk->flags & ALWAYS_ENABLED) && clk->usecount));

    if (clk->running != running) {

        clk->running = running;

        for (user = clk->users; *user; user ++)

            qemu_set_irq(*user, running);

        for (i = clk->child1; i; i = i->sibling)

            omap_clk_update(i);

    }

}

static void omap_clk_rate_update_full(struct clk *clk, unsigned long int rate,

                unsigned long int div, unsigned long int mult)

{

    struct clk *i;

    qemu_irq *user;

    clk->rate = muldiv64(rate, mult, div);

    if (clk->running)

        for (user = clk->users; *user; user ++)

            qemu_irq_raise(*user);

    for (i = clk->child1; i; i = i->sibling)

        omap_clk_rate_update_full(i, rate,

                        div * i->divisor, mult * i->multiplier);

}

static void omap_clk_rate_update(struct clk *clk)

{

    struct clk *i;

    unsigned long int div, mult = div = 1;

    for (i = clk; i->parent; i = i->parent) {

        div *= i->divisor;

        mult *= i->multiplier;

    }

    omap_clk_rate_update_full(clk, i->rate, div, mult);

}

void omap_clk_reparent(struct clk *clk, struct clk *parent)

{

    struct clk **p;

    if (clk->parent) {

        for (p = &clk->parent->child1; *p != clk; p = &(*p)->sibling);

        *p = clk->sibling;

    }

    clk->parent = parent;

    if (parent) {

        clk->sibling = parent->child1;

        parent->child1 = clk;

        omap_clk_update(clk);

        omap_clk_rate_update(clk);

    } else

        clk->sibling = 0;

}

void omap_clk_onoff(struct clk *clk, int on)

{

    clk->enabled = on;

    omap_clk_update(clk);

}

void omap_clk_canidle(struct clk *clk, int can)

{

    if (can)

        omap_clk_put(clk);

    else

        omap_clk_get(clk);

}

void omap_clk_setrate(struct clk *clk, int divide, int multiply)

{

    clk->divisor = divide;

    clk->multiplier = multiply;

    omap_clk_rate_update(clk);

}

int64_t omap_clk_getrate(omap_clk clk)

{

    return clk->rate;

}

void omap_clk_init(struct omap_mpu_state_s *mpu)

{

    struct clk **i, *j, *k;

    int count;

    int flag;

    if (cpu_is_omap310(mpu))

        flag = CLOCK_IN_OMAP310;

    else if (cpu_is_omap1510(mpu))

        flag = CLOCK_IN_OMAP1510;

    else

        return;

    for (i = onchip_clks, count = 0; *i; i ++)

        if ((*i)->flags & flag)

            count ++;

    mpu->clks = (struct clk *) qemu_mallocz(sizeof(struct clk) * (count + 1));

    for (i = onchip_clks, j = mpu->clks; *i; i ++)

        if ((*i)->flags & flag) {

            memcpy(j, *i, sizeof(struct clk));

            for (k = mpu->clks; k < j; k ++)

                if (j->parent && !strcmp(j->parent->name, k->name)) {

                    j->parent = k;

                    j->sibling = k->child1;

                    k->child1 = j;

                } else if (k->parent && !strcmp(k->parent->name, j->name)) {

                    k->parent = j;

                    k->sibling = j->child1;

                    j->child1 = k;

                }

            j->divisor = j->divisor ?: 1;

            j->multiplier = j->multiplier ?: 1;

            j ++;

        }

}