Commit | Line | Data |
---|---|---|
401301cc | 1 | /* |
a54c959d RH |
2 | * Clock driver for the ARM Integrator/AP, Integrator/CP, Versatile AB and |
3 | * Versatile PB boards. | |
401301cc LW |
4 | * Copyright (C) 2012 Linus Walleij |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | #include <linux/clk-provider.h> | |
a613163d LW |
11 | #include <linux/clk.h> |
12 | #include <linux/clkdev.h> | |
13 | #include <linux/err.h> | |
09c978bc LW |
14 | #include <linux/of.h> |
15 | #include <linux/of_address.h> | |
a613163d LW |
16 | |
17 | #include "clk-icst.h" | |
18 | ||
09c978bc | 19 | #define INTEGRATOR_HDR_LOCK_OFFSET 0x14 |
a613163d | 20 | |
a54c959d RH |
21 | #define VERSATILE_SYS_OSCCLCD_OFFSET 0x1c |
22 | #define VERSATILE_SYS_LOCK_OFFSET 0x20 | |
23 | ||
09c978bc LW |
24 | /* Base offset for the core module */ |
25 | static void __iomem *cm_base; | |
26 | ||
27 | static const struct icst_params cp_auxosc_params = { | |
a613163d LW |
28 | .vco_max = ICST525_VCO_MAX_5V, |
29 | .vco_min = ICST525_VCO_MIN, | |
30 | .vd_min = 8, | |
31 | .vd_max = 263, | |
32 | .rd_min = 3, | |
33 | .rd_max = 65, | |
34 | .s2div = icst525_s2div, | |
35 | .idx2s = icst525_idx2s, | |
36 | }; | |
37 | ||
09c978bc LW |
38 | static const struct clk_icst_desc __initdata cm_auxosc_desc = { |
39 | .params = &cp_auxosc_params, | |
7a9ad671 LW |
40 | .vco_offset = 0x1c, |
41 | .lock_offset = INTEGRATOR_HDR_LOCK_OFFSET, | |
a613163d LW |
42 | }; |
43 | ||
a54c959d RH |
44 | static const struct icst_params versatile_auxosc_params = { |
45 | .vco_max = ICST307_VCO_MAX, | |
46 | .vco_min = ICST307_VCO_MIN, | |
47 | .vd_min = 4 + 8, | |
48 | .vd_max = 511 + 8, | |
49 | .rd_min = 1 + 2, | |
50 | .rd_max = 127 + 2, | |
51 | .s2div = icst307_s2div, | |
52 | .idx2s = icst307_idx2s, | |
53 | }; | |
54 | ||
55 | static const struct clk_icst_desc versatile_auxosc_desc __initconst = { | |
56 | .params = &versatile_auxosc_params, | |
57 | .vco_offset = VERSATILE_SYS_OSCCLCD_OFFSET, | |
58 | .lock_offset = VERSATILE_SYS_LOCK_OFFSET, | |
59 | }; | |
60 | static void __init cm_osc_setup(struct device_node *np, | |
61 | const struct clk_icst_desc *desc) | |
a613163d | 62 | { |
09c978bc LW |
63 | struct clk *clk = ERR_PTR(-EINVAL); |
64 | const char *clk_name = np->name; | |
bf6edb4b | 65 | const char *parent_name; |
a613163d | 66 | |
09c978bc LW |
67 | if (!cm_base) { |
68 | /* Remap the core module base if not done yet */ | |
69 | struct device_node *parent; | |
a613163d | 70 | |
09c978bc LW |
71 | parent = of_get_parent(np); |
72 | if (!np) { | |
73 | pr_err("no parent on core module clock\n"); | |
74 | return; | |
75 | } | |
76 | cm_base = of_iomap(parent, 0); | |
77 | if (!cm_base) { | |
78 | pr_err("could not remap core module base\n"); | |
79 | return; | |
80 | } | |
81 | } | |
a613163d | 82 | |
bf6edb4b LW |
83 | parent_name = of_clk_get_parent_name(np, 0); |
84 | clk = icst_clk_register(NULL, desc, clk_name, parent_name, cm_base); | |
09c978bc LW |
85 | if (!IS_ERR(clk)) |
86 | of_clk_add_provider(np, of_clk_src_simple_get, clk); | |
a613163d | 87 | } |
a54c959d RH |
88 | |
89 | static void __init of_integrator_cm_osc_setup(struct device_node *np) | |
90 | { | |
91 | cm_osc_setup(np, &cm_auxosc_desc); | |
92 | } | |
09c978bc LW |
93 | CLK_OF_DECLARE(integrator_cm_auxosc_clk, |
94 | "arm,integrator-cm-auxosc", of_integrator_cm_osc_setup); | |
a54c959d RH |
95 | |
96 | static void __init of_versatile_cm_osc_setup(struct device_node *np) | |
97 | { | |
98 | cm_osc_setup(np, &versatile_auxosc_desc); | |
99 | } | |
100 | CLK_OF_DECLARE(versatile_cm_auxosc_clk, | |
101 | "arm,versatile-cm-auxosc", of_versatile_cm_osc_setup); |