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1 | /* |
2 | * OMAP SoC specific OPP wrapper function | |
3 | * | |
4 | * Copyright (C) 2009-2010 Texas Instruments Incorporated - http://www.ti.com/ | |
5 | * Nishanth Menon | |
6 | * Kevin Hilman | |
7 | * Copyright (C) 2010 Nokia Corporation. | |
8 | * Eduardo Valentin | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
15 | * kind, whether express or implied; without even the implied warranty | |
16 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | */ | |
19 | #include <linux/module.h> | |
20 | #include <linux/opp.h> | |
21 | ||
22 | #include <plat/omap_device.h> | |
23 | ||
24 | #include "omap_opp_data.h" | |
25 | ||
26 | /* Temp variable to allow multiple calls */ | |
27 | static u8 __initdata omap_table_init; | |
28 | ||
29 | /** | |
30 | * omap_init_opp_table() - Initialize opp table as per the CPU type | |
31 | * @opp_def: opp default list for this silicon | |
32 | * @opp_def_size: number of opp entries for this silicon | |
33 | * | |
34 | * Register the initial OPP table with the OPP library based on the CPU | |
35 | * type. This is meant to be used only by SoC specific registration. | |
36 | */ | |
37 | int __init omap_init_opp_table(struct omap_opp_def *opp_def, | |
38 | u32 opp_def_size) | |
39 | { | |
40 | int i, r; | |
41 | ||
42 | if (!opp_def || !opp_def_size) { | |
43 | pr_err("%s: invalid params!\n", __func__); | |
44 | return -EINVAL; | |
45 | } | |
46 | ||
47 | /* | |
48 | * Initialize only if not already initialized even if the previous | |
49 | * call failed, because, no reason we'd succeed again. | |
50 | */ | |
51 | if (omap_table_init) | |
52 | return -EEXIST; | |
53 | omap_table_init = 1; | |
54 | ||
55 | /* Lets now register with OPP library */ | |
56 | for (i = 0; i < opp_def_size; i++) { | |
57 | struct omap_hwmod *oh; | |
58 | struct device *dev; | |
59 | ||
60 | if (!opp_def->hwmod_name) { | |
61 | pr_err("%s: NULL name of omap_hwmod, failing [%d].\n", | |
62 | __func__, i); | |
63 | return -EINVAL; | |
64 | } | |
65 | oh = omap_hwmod_lookup(opp_def->hwmod_name); | |
66 | if (!oh || !oh->od) { | |
67 | pr_warn("%s: no hwmod or odev for %s, [%d] " | |
68 | "cannot add OPPs.\n", __func__, | |
69 | opp_def->hwmod_name, i); | |
70 | return -EINVAL; | |
71 | } | |
d66b3fe4 | 72 | dev = &oh->od->pdev->dev; |
fd1478cd NM |
73 | |
74 | r = opp_add(dev, opp_def->freq, opp_def->u_volt); | |
75 | if (r) { | |
76 | dev_err(dev, "%s: add OPP %ld failed for %s [%d] " | |
77 | "result=%d\n", | |
78 | __func__, opp_def->freq, | |
79 | opp_def->hwmod_name, i, r); | |
80 | } else { | |
81 | if (!opp_def->default_available) | |
82 | r = opp_disable(dev, opp_def->freq); | |
83 | if (r) | |
84 | dev_err(dev, "%s: disable %ld failed for %s " | |
85 | "[%d] result=%d\n", | |
86 | __func__, opp_def->freq, | |
87 | opp_def->hwmod_name, i, r); | |
88 | } | |
89 | opp_def++; | |
90 | } | |
91 | ||
92 | return 0; | |
93 | } |