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 
cpg_clk_init(void)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  */
arch_clk_init(void)75 int __init __weak arch_clk_init(void)
76 {
77 	return cpg_clk_init();
78 }
79