2 * OMAP2 ARM Performance Monitoring Unit (PMU) Support
4 * Copyright (C) 2012 Texas Instruments, Inc.
7 * Jon Hunter <jon-hunter@ti.com>
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.
17 #include "omap_hwmod.h"
18 #include "omap_device.h"
20 static char *omap2_pmu_oh_names[] = {"mpu"};
21 static char *omap3_pmu_oh_names[] = {"mpu", "debugss"};
22 static char *omap4430_pmu_oh_names[] = {"l3_main_3", "l3_instr", "debugss"};
23 static struct platform_device *omap_pmu_dev;
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
30 * Uses OMAP HWMOD framework to create and register an ARM PMU device
31 * from a list of HWMOD names passed. Currently supports OMAP2, OMAP3
34 static int __init omap2_init_pmu(unsigned oh_num, char *oh_names[])
37 struct omap_hwmod *oh[3];
38 char *dev_name = "arm-pmu";
40 if ((!oh_num) || (oh_num > 3))
43 for (i = 0; i < oh_num; i++) {
44 oh[i] = omap_hwmod_lookup(oh_names[i]);
46 pr_err("Could not look up %s hwmod\n", oh_names[i]);
51 omap_pmu_dev = omap_device_build_ss(dev_name, -1, oh, oh_num, NULL, 0);
52 WARN(IS_ERR(omap_pmu_dev), "Can't build omap_device for %s.\n",
55 if (IS_ERR(omap_pmu_dev))
56 return PTR_ERR(omap_pmu_dev);
61 static int __init omap_init_pmu(void)
67 * To create an ARM-PMU device the following HWMODs
68 * are required for the various OMAP2+ devices.
71 * OMAP3xxx: mpu, debugss
72 * OMAP4430: l3_main_3, l3_instr, debugss
73 * OMAP4460/70: mpu, debugss
75 if (cpu_is_omap443x()) {
76 oh_num = ARRAY_SIZE(omap4430_pmu_oh_names);
77 oh_names = omap4430_pmu_oh_names;
78 /* XXX Remove the next two lines when CTI driver available */
79 pr_info("ARM PMU: not yet supported on OMAP4430 due to missing CTI driver\n");
81 } else if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
82 oh_num = ARRAY_SIZE(omap3_pmu_oh_names);
83 oh_names = omap3_pmu_oh_names;
85 oh_num = ARRAY_SIZE(omap2_pmu_oh_names);
86 oh_names = omap2_pmu_oh_names;
89 return omap2_init_pmu(oh_num, oh_names);
91 omap_subsys_initcall(omap_init_pmu);