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1 | /* |
2 | * linux/arch/arm/mach-nomadik/clock.c |
3 | * |
4 | * Copyright (C) 2009 Alessandro Rubini |
5 | */ |
6 | #include <linux/kernel.h> |
7 | #include <linux/module.h> |
8 | #include <linux/errno.h> |
9 | #include <linux/clk.h> |
10 | #include <asm/clkdev.h> |
11 | #include "clock.h" |
12 | |
13 | /* |
14 | * The nomadik board uses generic clocks, but the serial pl011 file |
15 | * calls clk_enable(), clk_disable(), clk_get_rate(), so we provide them |
16 | */ |
17 | unsigned long clk_get_rate(struct clk *clk) |
18 | { |
19 | return clk->rate; |
20 | } |
21 | EXPORT_SYMBOL(clk_get_rate); |
22 | |
23 | /* enable and disable do nothing */ |
24 | int clk_enable(struct clk *clk) |
25 | { |
26 | return 0; |
27 | } |
28 | EXPORT_SYMBOL(clk_enable); |
29 | |
30 | void clk_disable(struct clk *clk) |
31 | { |
32 | } |
33 | EXPORT_SYMBOL(clk_disable); |
34 | |
35 | static struct clk clk_24 = { |
36 | .rate = 2400000, |
37 | }; |
38 | |
39 | static struct clk clk_48 = { |
40 | .rate = 48 * 1000 * 1000, |
41 | }; |
42 | |
43 | /* |
44 | * Catch-all default clock to satisfy drivers using the clk API. We don't |
45 | * model the actual hardware clocks yet. |
46 | */ |
47 | static struct clk clk_default; |
48 | |
49 | #define CLK(_clk, dev) \ |
50 | { \ |
51 | .clk = _clk, \ |
52 | .dev_id = dev, \ |
53 | } |
54 | |
55 | static struct clk_lookup lookups[] = { |
56 | { |
57 | .con_id = "apb_pclk", |
58 | .clk = &clk_default, |
59 | }, |
60 | CLK(&clk_24, "mtu0"), |
61 | CLK(&clk_24, "mtu1"), |
62 | CLK(&clk_48, "uart0"), |
63 | CLK(&clk_48, "uart1"), |
64 | CLK(&clk_default, "gpio.0"), |
65 | CLK(&clk_default, "gpio.1"), |
66 | CLK(&clk_default, "gpio.2"), |
67 | CLK(&clk_default, "gpio.3"), |
68 | CLK(&clk_default, "rng"), |
69 | }; |
70 | |
71 | int __init clk_init(void) |
72 | { |
73 | clkdev_add_table(lookups, ARRAY_SIZE(lookups)); |
74 | return 0; |
75 | } |
76 |
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