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
   8 static struct clk master_clk = {
   9         .flags          = CLK_ENABLE_ON_INIT,
  10         .rate           = CONFIG_SH_PCLK_FREQ,
  11 };
  12
  13 static struct clk peripheral_clk = {
  14         .parent         = &master_clk,
  15         .flags          = CLK_ENABLE_ON_INIT,
  16 };
  17
  18 static struct clk bus_clk = {
  19         .parent         = &master_clk,
  20         .flags          = CLK_ENABLE_ON_INIT,
  21 };
  22
  23 static 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  */
  31 static 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
  40 static 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
  48 int __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  */
  73 int __init __weak arch_clk_init(void)
  74 {
  75         return cpg_clk_init();
  76 }