// SPDX-License-Identifier: GPL-2.0
#include <linux/clk.h>
#include <linux/compiler.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/clkdev.h>
#include <asm/clock.h>

static struct clk master_clk = {
        .flags          = CLK_ENABLE_ON_INIT,
        .rate           = CONFIG_SH_PCLK_FREQ,
};

static struct clk peripheral_clk = {
        .parent         = &master_clk,
        .flags          = CLK_ENABLE_ON_INIT,
};

static struct clk bus_clk = {
        .parent         = &master_clk,
        .flags          = CLK_ENABLE_ON_INIT,
};

static struct clk cpu_clk = {
        .parent         = &master_clk,
        .flags          = CLK_ENABLE_ON_INIT,
};

/*
 * The ordering of these clocks matters, do not change it.
 */
static struct clk *onchip_clocks[] = {
        &master_clk,
        &peripheral_clk,
        &bus_clk,
        &cpu_clk,
};

static struct clk_lookup lookups[] = {
        /* main clocks */
        CLKDEV_CON_ID("master_clk", &master_clk),
        CLKDEV_CON_ID("peripheral_clk", &peripheral_clk),
        CLKDEV_CON_ID("bus_clk", &bus_clk),
        CLKDEV_CON_ID("cpu_clk", &cpu_clk),
};

int __init __deprecated cpg_clk_init(void)
{
        int i, ret = 0;

        for (i = 0; i < ARRAY_SIZE(onchip_clocks); i++) {
                struct clk *clk = onchip_clocks[i];
                arch_init_clk_ops(&clk->ops, i);
                if (clk->ops)
                        ret |= clk_register(clk);
        }

        clkdev_add_table(lookups, ARRAY_SIZE(lookups));

        clk_add_alias("fck", "sh-tmu-sh3.0", "peripheral_clk", NULL);
        clk_add_alias("fck", "sh-tmu.0", "peripheral_clk", NULL);
        clk_add_alias("fck", "sh-tmu.1", "peripheral_clk", NULL);
        clk_add_alias("fck", "sh-tmu.2", "peripheral_clk", NULL);
        clk_add_alias("fck", "sh-mtu2", "peripheral_clk", NULL);
        clk_add_alias("fck", "sh-cmt-16.0", "peripheral_clk", NULL);
        clk_add_alias("fck", "sh-cmt-32.0", "peripheral_clk", NULL);

        return ret;
}

/*
 * Placeholder for compatibility, until the lazy CPUs do this
 * on their own.
 */
int __init __weak arch_clk_init(void)
{
        return cpg_clk_init();
}