ARM: tegra: move timerinfo to drivers/misc/

Bug 1380001

Change-Id: I0cb9a887ad85b67ba14626e3ab5543525cf26a00
Signed-off-by: Sumit Singh <sumsingh@nvidia.com>
Reviewed-on: http://git-master/r/354930
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Sri Krishna Chowdary <schowdary@nvidia.com>
Reviewed-by: Sachin Nikam <snikam@nvidia.com>

2 files changed, 76 insertions, 0 deletions

diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 997a7b6f3779..fd744b89a148 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -82,3 +82,4 @@ obj-$(CONFIG_TEGRA_PROFILER)    += tegra-profiler/
 obj-$(CONFIG_MTK_GPS)		+= gps/
 obj-y		+= tegra-fuse/
 obj-$(CONFIG_DENVER_CPU)	+= force_idle_t132.o
+obj-$(CONFIG_ARCH_TEGRA)        +=tegra_timerinfo.o
diff --git a/drivers/misc/tegra_timerinfo.c b/drivers/misc/tegra_timerinfo.c
new file mode 100644
index 000000000000..ad38b75eb94c
--- /dev/null
+++ b/drivers/misc/tegra_timerinfo.c
@@ -0,0 +1,75 @@
+/*
+ * drivers/misc/tegra_timerinfo.c
+ *
+ * Copyright (c) 2012-2014, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Author:
+ *	Jon Mayo <jmayo@nvidia.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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/init.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/platform_device.h>
+#include <linux/miscdevice.h>
+#include <linux/export.h>
+#include <linux/module.h>
+#include <linux/tegra-timer.h>
+
+static int timerinfo_dev_mmap(struct file *file, struct vm_area_struct *vma);
+
+static const struct file_operations timerinfo_dev_fops = {
+	.owner = THIS_MODULE,
+	.open = nonseekable_open,
+	.mmap = timerinfo_dev_mmap,
+	.llseek = noop_llseek,
+};
+
+static struct miscdevice timerinfo_dev = {
+	.minor = MISC_DYNAMIC_MINOR,
+	.name = "timerinfo",
+	.fops = &timerinfo_dev_fops,
+};
+
+static int timerinfo_dev_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	/* start at first page containing TIMERUS_CNTR_1US */
+	if (IS_ERR_OR_NULL(timer_reg_base_pa)) {
+		pr_err("%s: Invalid timer_base_address\n", __func__);
+		return -EINVAL;
+	}
+
+	if (vma->vm_end  - vma->vm_start != PAGE_SIZE)
+		return -EINVAL;
+
+	if (vma->vm_flags & VM_WRITE)
+		return -EPERM;
+
+	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+	if (remap_pfn_range(vma, vma->vm_start, timer_reg_base_pa >> PAGE_SHIFT,
+						PAGE_SIZE, vma->vm_page_prot)) {
+		pr_err("%s: remap_pfn_range failed\n", timerinfo_dev.name);
+		return -EAGAIN;
+	}
+
+	return 0;
+}
+
+static int __init timerinfo_dev_init(void)
+{
+	return misc_register(&timerinfo_dev);
+}
+
+module_init(timerinfo_dev_init);
+MODULE_LICENSE("GPL");