LXR linux/arch/sh/kernel/cpu/clock-cpg.c

   1#include <linux/clk.h>
   2#include <linux/compiler.h>
   3#include <linux/slab.h>
   4#include <linux/io.h>
   5#include <linux/clkdev.h>
   6#include <asm/clock.h>
   7
   8static struct clk master_clk = {
   9        .flags          = CLK_ENABLE_ON_INIT,
  10        .rate           = CONFIG_SH_PCLK_FREQ,
  11};
  12
  13static struct clk peripheral_clk = {
  14        .parent         = &master_clk,
  15        .flags          = CLK_ENABLE_ON_INIT,
  16};
  17
  18static struct clk bus_clk = {
  19        .parent         = &master_clk,
  20        .flags          = CLK_ENABLE_ON_INIT,
  21};
  22
  23static struct clk cpu_clk = {
  24        .parent         = &master_clk,
  25        .flags          = CLK_ENABLE_ON_INIT,
  26};
  27
  28/*
  29 * The ordering of these clocks matters, do not change it.
  30 */
  31static struct clk *onchip_clocks[] = {
  32        &master_clk,
  33        &peripheral_clk,
  34        &bus_clk,
  35        &cpu_clk,
  36};
  37
  38#define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
  39
  40static struct clk_lookup lookups[] = {
  41        /* main clocks */
  42        CLKDEV_CON_ID("master_clk", &master_clk),
  43        CLKDEV_CON_ID("peripheral_clk", &peripheral_clk),
  44        CLKDEV_CON_ID("bus_clk", &bus_clk),
  45        CLKDEV_CON_ID("cpu_clk", &cpu_clk),
  46};
  47
  48int __init __deprecated cpg_clk_init(void)
  49{
  50        int i, ret = 0;
  51
  52        for (i = 0; i < ARRAY_SIZE(onchip_clocks); i++) {
  53                struct clk *clk = onchip_clocks[i];
  54                arch_init_clk_ops(&clk->ops, i);
  55                if (clk->ops)
  56                        ret |= clk_register(clk);
  57        }
  58
  59        clkdev_add_table(lookups, ARRAY_SIZE(lookups));
  60
  61        clk_add_alias("tmu_fck", NULL, "peripheral_clk", NULL);
  62        clk_add_alias("mtu2_fck", NULL, "peripheral_clk", NULL);
  63        clk_add_alias("cmt_fck", NULL, "peripheral_clk", NULL);
  64        clk_add_alias("sci_ick", NULL, "peripheral_clk", NULL);
  65
  66        return ret;
  67}
  68
  69/*
  70 * Placeholder for compatability, until the lazy CPUs do this
  71 * on their own.
  72 */
  73int __init __weak arch_clk_init(void)
  74{
  75        return cpg_clk_init();
  76}
  77