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 | 11 | #include <linux/err.h> |
09c978bc LW |
12 | #include <linux/of.h> |
13 | #include <linux/of_address.h> | |
a613163d LW |
14 | |
15 | #include "clk-icst.h" | |
16 | ||
09c978bc | 17 | #define INTEGRATOR_HDR_LOCK_OFFSET 0x14 |
a613163d | 18 | |
a54c959d RH |
19 | #define VERSATILE_SYS_OSCCLCD_OFFSET 0x1c |
20 | #define VERSATILE_SYS_LOCK_OFFSET 0x20 | |
21 | ||
09c978bc LW |
22 | /* Base offset for the core module */ |
23 | static void __iomem *cm_base; | |
24 | ||
25 | static const struct icst_params cp_auxosc_params = { | |
a613163d LW |
26 | .vco_max = ICST525_VCO_MAX_5V, |
27 | .vco_min = ICST525_VCO_MIN, | |
28 | .vd_min = 8, | |
29 | .vd_max = 263, | |
30 | .rd_min = 3, | |
31 | .rd_max = 65, | |
32 | .s2div = icst525_s2div, | |
33 | .idx2s = icst525_idx2s, | |
34 | }; | |
35 | ||
e3ee276a | 36 | static const struct clk_icst_desc cm_auxosc_desc __initconst = { |
09c978bc | 37 | .params = &cp_auxosc_params, |
7a9ad671 LW |
38 | .vco_offset = 0x1c, |
39 | .lock_offset = INTEGRATOR_HDR_LOCK_OFFSET, | |
a613163d LW |
40 | }; |
41 | ||
a54c959d RH |
42 | static const struct icst_params versatile_auxosc_params = { |
43 | .vco_max = ICST307_VCO_MAX, | |
44 | .vco_min = ICST307_VCO_MIN, | |
45 | .vd_min = 4 + 8, | |
46 | .vd_max = 511 + 8, | |
47 | .rd_min = 1 + 2, | |
48 | .rd_max = 127 + 2, | |
49 | .s2div = icst307_s2div, | |
50 | .idx2s = icst307_idx2s, | |
51 | }; | |
52 | ||
53 | static const struct clk_icst_desc versatile_auxosc_desc __initconst = { | |
54 | .params = &versatile_auxosc_params, | |
55 | .vco_offset = VERSATILE_SYS_OSCCLCD_OFFSET, | |
56 | .lock_offset = VERSATILE_SYS_LOCK_OFFSET, | |
57 | }; | |
58 | static void __init cm_osc_setup(struct device_node *np, | |
59 | const struct clk_icst_desc *desc) | |
a613163d | 60 | { |
09c978bc LW |
61 | struct clk *clk = ERR_PTR(-EINVAL); |
62 | const char *clk_name = np->name; | |
bf6edb4b | 63 | const char *parent_name; |
a613163d | 64 | |
09c978bc LW |
65 | if (!cm_base) { |
66 | /* Remap the core module base if not done yet */ | |
67 | struct device_node *parent; | |
a613163d | 68 | |
09c978bc | 69 | parent = of_get_parent(np); |
e52786ac | 70 | if (!parent) { |
09c978bc LW |
71 | pr_err("no parent on core module clock\n"); |
72 | return; | |
73 | } | |
74 | cm_base = of_iomap(parent, 0); | |
75 | if (!cm_base) { | |
76 | pr_err("could not remap core module base\n"); | |
77 | return; | |
78 | } | |
79 | } | |
a613163d | 80 | |
bf6edb4b LW |
81 | parent_name = of_clk_get_parent_name(np, 0); |
82 | clk = icst_clk_register(NULL, desc, clk_name, parent_name, cm_base); | |
09c978bc LW |
83 | if (!IS_ERR(clk)) |
84 | of_clk_add_provider(np, of_clk_src_simple_get, clk); | |
a613163d | 85 | } |
a54c959d RH |
86 | |
87 | static void __init of_integrator_cm_osc_setup(struct device_node *np) | |
88 | { | |
89 | cm_osc_setup(np, &cm_auxosc_desc); | |
90 | } | |
09c978bc LW |
91 | CLK_OF_DECLARE(integrator_cm_auxosc_clk, |
92 | "arm,integrator-cm-auxosc", of_integrator_cm_osc_setup); | |
a54c959d RH |
93 | |
94 | static void __init of_versatile_cm_osc_setup(struct device_node *np) | |
95 | { | |
96 | cm_osc_setup(np, &versatile_auxosc_desc); | |
97 | } | |
98 | CLK_OF_DECLARE(versatile_cm_auxosc_clk, | |
99 | "arm,versatile-cm-auxosc", of_versatile_cm_osc_setup); |