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

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/clk.h>
   3 #include <linux/compiler.h>
   4 #include <linux/slab.h>
   5 #include <linux/io.h>
   6 #include <linux/clkdev.h>
   7 #include <asm/clock.h>
   8
   9 static struct clk master_clk = {
  10         .flags          = CLK_ENABLE_ON_INIT,
  11         .rate           = CONFIG_SH_PCLK_FREQ,
  12 };
  13
  14 static struct clk peripheral_clk = {
  15         .parent         = &master_clk,
  16         .flags          = CLK_ENABLE_ON_INIT,
  17 };
  18
  19 static struct clk bus_clk = {
  20         .parent         = &master_clk,
  21         .flags          = CLK_ENABLE_ON_INIT,
  22 };
  23
  24 static struct clk cpu_clk = {
  25         .parent         = &master_clk,
  26         .flags          = CLK_ENABLE_ON_INIT,
  27 };
  28
  29 /*
  30  * The ordering of these clocks matters, do not change it.
  31  */
  32 static struct clk *onchip_clocks[] = {
  33         &master_clk,
  34         &peripheral_clk,
  35         &bus_clk,
  36         &cpu_clk,
  37 };
  38
  39 static struct clk_lookup lookups[] = {
  40         /* main clocks */
  41         CLKDEV_CON_ID("master_clk", &master_clk),
  42         CLKDEV_CON_ID("peripheral_clk", &peripheral_clk),
  43         CLKDEV_CON_ID("bus_clk", &bus_clk),
  44         CLKDEV_CON_ID("cpu_clk", &cpu_clk),
  45 };
  46
  47 int __init __deprecated cpg_clk_init(void)
  48 {
  49         int i, ret = 0;
  50
  51         for (i = 0; i < ARRAY_SIZE(onchip_clocks); i++) {
  52                 struct clk *clk = onchip_clocks[i];
  53                 arch_init_clk_ops(&clk->ops, i);
  54                 if (clk->ops)
  55                         ret |= clk_register(clk);
  56         }
  57
  58         clkdev_add_table(lookups, ARRAY_SIZE(lookups));
  59
  60         clk_add_alias("fck", "sh-tmu-sh3.0", "peripheral_clk", NULL);
  61         clk_add_alias("fck", "sh-tmu.0", "peripheral_clk", NULL);
  62         clk_add_alias("fck", "sh-tmu.1", "peripheral_clk", NULL);
  63         clk_add_alias("fck", "sh-tmu.2", "peripheral_clk", NULL);
  64         clk_add_alias("fck", "sh-mtu2", "peripheral_clk", NULL);
  65         clk_add_alias("fck", "sh-cmt-16.0", "peripheral_clk", NULL);
  66         clk_add_alias("fck", "sh-cmt-32.0", "peripheral_clk", NULL);
  67
  68         return ret;
  69 }
  70
  71 /*
  72  * Placeholder for compatibility, until the lazy CPUs do this
  73  * on their own.
  74  */
  75 int __init __weak arch_clk_init(void)
  76 {
  77         return cpg_clk_init();
  78 }