2 files changed, 64 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index a9e3974d015f..ec24999eefea 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -243,3 +243,4 @@ obj-y					+= $(smc91x-m) $(smc91x-y)
 
 smsc911x-$(CONFIG_SMSC911X)             := gpmc-smsc911x.o
 obj-y                                   += $(smsc911x-m) $(smsc911x-y)
+obj-$(CONFIG_ARCH_OMAP4)                += hwspinlock.o
diff --git a/arch/arm/mach-omap2/hwspinlock.c b/arch/arm/mach-omap2/hwspinlock.c
new file mode 100644
index 000000000000..06d4a80660a5
--- /dev/null
+++ b/arch/arm/mach-omap2/hwspinlock.c
@@ -0,0 +1,63 @@
+/*
+ * OMAP hardware spinlock device initialization
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Contact: Simon Que <sque@ti.com>
+ *          Hari Kanigeri <h-kanigeri2@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/err.h>
+
+#include <plat/omap_hwmod.h>
+#include <plat/omap_device.h>
+
+struct omap_device_pm_latency omap_spinlock_latency[] = {
+        {
+                .deactivate_func = omap_device_idle_hwmods,
+                .activate_func   = omap_device_enable_hwmods,
+                .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
+        }
+};
+
+int __init hwspinlocks_init(void)
+{
+        int retval = 0;
+        struct omap_hwmod *oh;
+        struct omap_device *od;
+        const char *oh_name = "spinlock";
+        const char *dev_name = "omap_hwspinlock";
+
+        /*
+         * Hwmod lookup will fail in case our platform doesn't support the
+         * hardware spinlock module, so it is safe to run this initcall
+         * on all omaps
+         */
+        oh = omap_hwmod_lookup(oh_name);
+        if (oh == NULL)
+                return -EINVAL;
+
+        od = omap_device_build(dev_name, 0, oh, NULL, 0,
+                                omap_spinlock_latency,
+                                ARRAY_SIZE(omap_spinlock_latency), false);
+        if (IS_ERR(od)) {
+                pr_err("Can't build omap_device for %s:%s\n", dev_name,
+                                                                oh_name);
+                retval = PTR_ERR(od);
+        }
+
+        return retval;
+}
+/* early board code might need to reserve specific hwspinlock instances */
+postcore_initcall(hwspinlocks_init);