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
  38static struct clk_lookup lookups[] = {
  39        /* main clocks */
  40        CLKDEV_CON_ID("master_clk", &master_clk),
  41        CLKDEV_CON_ID("peripheral_clk", &peripheral_clk),
  42        CLKDEV_CON_ID("bus_clk", &bus_clk),
  43        CLKDEV_CON_ID("cpu_clk", &cpu_clk),
  44};
  45
  46int __init __deprecated cpg_clk_init(void)
  47{
  48        int i, ret = 0;
  49
  50        for (i = 0; i < ARRAY_SIZE(onchip_clocks); i++) {
  51                struct clk *clk = onchip_clocks[i];
  52                arch_init_clk_ops(&clk->ops, i);
  53                if (clk->ops)
  54                        ret |= clk_register(clk);
  55        }
  56
  57        clkdev_add_table(lookups, ARRAY_SIZE(lookups));
  58
  59        clk_add_alias("fck", "sh-tmu-sh3.0", "peripheral_clk", NULL);
  60        clk_add_alias("fck", "sh-tmu.0", "peripheral_clk", NULL);
  61        clk_add_alias("fck", "sh-tmu.1", "peripheral_clk", NULL);
  62        clk_add_alias("fck", "sh-tmu.2", "peripheral_clk", NULL);
  63        clk_add_alias("fck", "sh-mtu2", "peripheral_clk", NULL);
  64        clk_add_alias("fck", "sh-cmt-16.0", "peripheral_clk", NULL);
  65        clk_add_alias("fck", "sh-cmt-32.0", "peripheral_clk", NULL);
  66
  67        return ret;
  68}
  69
  70/*
  71 * Placeholder for compatibility, until the lazy CPUs do this
  72 * on their own.
  73 */
  74int __init __weak arch_clk_init(void)
  75{
  76        return cpg_clk_init();
  77}
  78