Commit | Line | Data |
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ee75d95c JH |
1 | /* |
2 | * OMAP2 ARM Performance Monitoring Unit (PMU) Support | |
3 | * | |
4 | * Copyright (C) 2012 Texas Instruments, Inc. | |
5 | * | |
6 | * Contacts: | |
7 | * Jon Hunter <jon-hunter@ti.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | */ | |
ee75d95c JH |
14 | #include <asm/pmu.h> |
15 | ||
e4c060db | 16 | #include "soc.h" |
2a296c8f | 17 | #include "omap_hwmod.h" |
25c7d49e | 18 | #include "omap_device.h" |
ee75d95c JH |
19 | |
20 | static char *omap2_pmu_oh_names[] = {"mpu"}; | |
21 | static char *omap3_pmu_oh_names[] = {"mpu", "debugss"}; | |
efc7f49c | 22 | static char *omap4430_pmu_oh_names[] = {"l3_main_3", "l3_instr", "debugss"}; |
ee75d95c JH |
23 | static struct platform_device *omap_pmu_dev; |
24 | ||
25 | /** | |
26 | * omap2_init_pmu - creates and registers PMU platform device | |
27 | * @oh_num: Number of OMAP HWMODs required to create PMU device | |
28 | * @oh_names: Array of OMAP HWMODS names required to create PMU device | |
29 | * | |
30 | * Uses OMAP HWMOD framework to create and register an ARM PMU device | |
efc7f49c | 31 | * from a list of HWMOD names passed. Currently supports OMAP2, OMAP3 |
76a5d9bf | 32 | * and OMAP4 devices. |
ee75d95c JH |
33 | */ |
34 | static int __init omap2_init_pmu(unsigned oh_num, char *oh_names[]) | |
35 | { | |
36 | int i; | |
efc7f49c | 37 | struct omap_hwmod *oh[3]; |
ee75d95c JH |
38 | char *dev_name = "arm-pmu"; |
39 | ||
efc7f49c | 40 | if ((!oh_num) || (oh_num > 3)) |
ee75d95c JH |
41 | return -EINVAL; |
42 | ||
43 | for (i = 0; i < oh_num; i++) { | |
44 | oh[i] = omap_hwmod_lookup(oh_names[i]); | |
45 | if (!oh[i]) { | |
46 | pr_err("Could not look up %s hwmod\n", oh_names[i]); | |
47 | return -ENODEV; | |
48 | } | |
49 | } | |
50 | ||
51 | omap_pmu_dev = omap_device_build_ss(dev_name, -1, oh, oh_num, NULL, 0, | |
52 | NULL, 0, 0); | |
53 | WARN(IS_ERR(omap_pmu_dev), "Can't build omap_device for %s.\n", | |
54 | dev_name); | |
55 | ||
6a9bce27 JH |
56 | if (IS_ERR(omap_pmu_dev)) |
57 | return PTR_ERR(omap_pmu_dev); | |
58 | ||
6a9bce27 | 59 | return 0; |
ee75d95c JH |
60 | } |
61 | ||
62 | static int __init omap_init_pmu(void) | |
63 | { | |
64 | unsigned oh_num; | |
65 | char **oh_names; | |
66 | ||
67 | /* | |
68 | * To create an ARM-PMU device the following HWMODs | |
69 | * are required for the various OMAP2+ devices. | |
70 | * | |
71 | * OMAP24xx: mpu | |
72 | * OMAP3xxx: mpu, debugss | |
efc7f49c | 73 | * OMAP4430: l3_main_3, l3_instr, debugss |
76a5d9bf | 74 | * OMAP4460/70: mpu, debugss |
ee75d95c | 75 | */ |
76a5d9bf | 76 | if (cpu_is_omap443x()) { |
efc7f49c ML |
77 | oh_num = ARRAY_SIZE(omap4430_pmu_oh_names); |
78 | oh_names = omap4430_pmu_oh_names; | |
79 | /* XXX Remove the next two lines when CTI driver available */ | |
80 | pr_info("ARM PMU: not yet supported on OMAP4430 due to missing CTI driver\n"); | |
81 | return 0; | |
76a5d9bf JH |
82 | } else if (cpu_is_omap34xx() || cpu_is_omap44xx()) { |
83 | oh_num = ARRAY_SIZE(omap3_pmu_oh_names); | |
84 | oh_names = omap3_pmu_oh_names; | |
ee75d95c | 85 | } else { |
76a5d9bf JH |
86 | oh_num = ARRAY_SIZE(omap2_pmu_oh_names); |
87 | oh_names = omap2_pmu_oh_names; | |
ee75d95c JH |
88 | } |
89 | ||
90 | return omap2_init_pmu(oh_num, oh_names); | |
91 | } | |
92 | subsys_initcall(omap_init_pmu); |