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.
14 #include <linux/pm_runtime.h>
18 #include <plat/omap_hwmod.h>
19 #include <plat/omap_device.h>
21 static char *omap2_pmu_oh_names
[] = {"mpu"};
22 static char *omap3_pmu_oh_names
[] = {"mpu", "debugss"};
23 static char *omap4430_pmu_oh_names
[] = {"l3_main_3", "l3_instr", "debugss"};
24 static struct platform_device
*omap_pmu_dev
;
27 * omap2_init_pmu - creates and registers PMU platform device
28 * @oh_num: Number of OMAP HWMODs required to create PMU device
29 * @oh_names: Array of OMAP HWMODS names required to create PMU device
31 * Uses OMAP HWMOD framework to create and register an ARM PMU device
32 * from a list of HWMOD names passed. Currently supports OMAP2, OMAP3
35 static int __init
omap2_init_pmu(unsigned oh_num
, char *oh_names
[])
38 struct omap_hwmod
*oh
[3];
39 char *dev_name
= "arm-pmu";
41 if ((!oh_num
) || (oh_num
> 3))
44 for (i
= 0; i
< oh_num
; i
++) {
45 oh
[i
] = omap_hwmod_lookup(oh_names
[i
]);
47 pr_err("Could not look up %s hwmod\n", oh_names
[i
]);
52 omap_pmu_dev
= omap_device_build_ss(dev_name
, -1, oh
, oh_num
, NULL
, 0,
54 WARN(IS_ERR(omap_pmu_dev
), "Can't build omap_device for %s.\n",
57 if (IS_ERR(omap_pmu_dev
))
58 return PTR_ERR(omap_pmu_dev
);
60 pm_runtime_enable(&omap_pmu_dev
->dev
);
65 static int __init
omap_init_pmu(void)
71 * To create an ARM-PMU device the following HWMODs
72 * are required for the various OMAP2+ devices.
75 * OMAP3xxx: mpu, debugss
76 * OMAP4430: l3_main_3, l3_instr, debugss
77 * OMAP4460/70: mpu, debugss
79 if (cpu_is_omap443x()) {
80 oh_num
= ARRAY_SIZE(omap4430_pmu_oh_names
);
81 oh_names
= omap4430_pmu_oh_names
;
82 /* XXX Remove the next two lines when CTI driver available */
83 pr_info("ARM PMU: not yet supported on OMAP4430 due to missing CTI driver\n");
85 } else if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
86 oh_num
= ARRAY_SIZE(omap3_pmu_oh_names
);
87 oh_names
= omap3_pmu_oh_names
;
89 oh_num
= ARRAY_SIZE(omap2_pmu_oh_names
);
90 oh_names
= omap2_pmu_oh_names
;
93 return omap2_init_pmu(oh_num
, oh_names
);
95 subsys_initcall(omap_init_pmu
);
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