Linux Kernel  3.7.1
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clock-cpg.c
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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,
16 };
17 
18 static struct clk bus_clk = {
19  .parent = &master_clk,
21 };
22 
23 static struct clk cpu_clk = {
24  .parent = &master_clk,
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 static 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 
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("tmu_fck", NULL, "peripheral_clk", NULL);
60  clk_add_alias("mtu2_fck", NULL, "peripheral_clk", NULL);
61  clk_add_alias("cmt_fck", NULL, "peripheral_clk", NULL);
62  clk_add_alias("sci_ick", NULL, "peripheral_clk", NULL);
63 
64  return ret;
65 }
66 
67 /*
68  * Placeholder for compatibility, until the lazy CPUs do this
69  * on their own.
70  */
72 {
73  return cpg_clk_init();
74 }