gpu: nvgpu: abstract dt functions

Added nvgpu_dt_read_u32_index() for now.

Jira VFND-4870

Change-Id: I3e51c408dfba3864372c515ba5d2c77708a489c8
Signed-off-by: Richard Zhao <rizhao@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1683008
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/dt.c b/drivers/gpu/nvgpu/common/linux/dt.c
new file mode 100644
index 00000000..88e391e3
--- /dev/null
+++ b/drivers/gpu/nvgpu/common/linux/dt.c
@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2018, NVIDIA Corporation.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <nvgpu/dt.h>
+#include <linux/of.h>
+
+#include "os_linux.h"
+
+int nvgpu_dt_read_u32_index(struct gk20a *g, const char *name,
+                                u32 index, u32 *value)
+{
+        struct device *dev = dev_from_gk20a(g);
+        struct device_node *np = dev->of_node;
+
+        return of_property_read_u32_index(np, name, index, value);
+}