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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/arm/mach-omap2/pmu.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/arm/mach-omap2/pmu.c')
-rw-r--r--kernel/arch/arm/mach-omap2/pmu.c97
1 files changed, 97 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-omap2/pmu.c b/kernel/arch/arm/mach-omap2/pmu.c
new file mode 100644
index 000000000..a69e9a33c
--- /dev/null
+++ b/kernel/arch/arm/mach-omap2/pmu.c
@@ -0,0 +1,97 @@
+/*
+ * OMAP2 ARM Performance Monitoring Unit (PMU) Support
+ *
+ * Copyright (C) 2012 Texas Instruments, Inc.
+ *
+ * Contacts:
+ * Jon Hunter <jon-hunter@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+#include <linux/of.h>
+
+#include <asm/system_info.h>
+
+#include "soc.h"
+#include "omap_hwmod.h"
+#include "omap_device.h"
+
+static char *omap2_pmu_oh_names[] = {"mpu"};
+static char *omap3_pmu_oh_names[] = {"mpu", "debugss"};
+static char *omap4430_pmu_oh_names[] = {"l3_main_3", "l3_instr", "debugss"};
+static struct platform_device *omap_pmu_dev;
+
+/**
+ * omap2_init_pmu - creates and registers PMU platform device
+ * @oh_num: Number of OMAP HWMODs required to create PMU device
+ * @oh_names: Array of OMAP HWMODS names required to create PMU device
+ *
+ * Uses OMAP HWMOD framework to create and register an ARM PMU device
+ * from a list of HWMOD names passed. Currently supports OMAP2, OMAP3
+ * and OMAP4 devices.
+ */
+static int __init omap2_init_pmu(unsigned oh_num, char *oh_names[])
+{
+ int i;
+ struct omap_hwmod *oh[3];
+ char *dev_name = cpu_architecture() == CPU_ARCH_ARMv6 ?
+ "armv6-pmu" : "armv7-pmu";
+
+ if ((!oh_num) || (oh_num > 3))
+ return -EINVAL;
+
+ for (i = 0; i < oh_num; i++) {
+ oh[i] = omap_hwmod_lookup(oh_names[i]);
+ if (!oh[i]) {
+ pr_err("Could not look up %s hwmod\n", oh_names[i]);
+ return -ENODEV;
+ }
+ }
+
+ omap_pmu_dev = omap_device_build_ss(dev_name, -1, oh, oh_num, NULL, 0);
+ WARN(IS_ERR(omap_pmu_dev), "Can't build omap_device for %s.\n",
+ dev_name);
+
+ return PTR_RET(omap_pmu_dev);
+}
+
+static int __init omap_init_pmu(void)
+{
+ unsigned oh_num;
+ char **oh_names;
+
+ /* XXX Remove this check when the CTI driver is available */
+ if (cpu_is_omap443x()) {
+ pr_info("ARM PMU: not yet supported on OMAP4430 due to missing CTI driver\n");
+ return 0;
+ }
+
+ if (of_have_populated_dt())
+ return 0;
+
+ /*
+ * To create an ARM-PMU device the following HWMODs
+ * are required for the various OMAP2+ devices.
+ *
+ * OMAP24xx: mpu
+ * OMAP3xxx: mpu, debugss
+ * OMAP4430: l3_main_3, l3_instr, debugss
+ * OMAP4460/70: mpu, debugss
+ */
+ if (cpu_is_omap443x()) {
+ oh_num = ARRAY_SIZE(omap4430_pmu_oh_names);
+ oh_names = omap4430_pmu_oh_names;
+ } else if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
+ oh_num = ARRAY_SIZE(omap3_pmu_oh_names);
+ oh_names = omap3_pmu_oh_names;
+ } else {
+ oh_num = ARRAY_SIZE(omap2_pmu_oh_names);
+ oh_names = omap2_pmu_oh_names;
+ }
+
+ return omap2_init_pmu(oh_num, oh_names);
+}
+omap_subsys_initcall(omap_init_pmu);