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of: Add snapshot of of_common.h file

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Add snapshot of of_common.h file from msm-5.10
commit 1ffab74be981 ("Merge "msm: kgsl: Verify secure
access before importing buffers"") file for client drivers
using of_fdt_get_ddrtype API.

Change-Id: I80b88cb13eab0ab6ad32c98e077e48fe997fe299
Signed-off-by: Vamsi Krishna Lanka <vamslank@codeaurora.org>
This commit is contained in:
Vamsi Krishna Lanka 2021-10-06 11:44:18 -07:00 committed by Gerrit - the friendly Code Review server
parent 7d37a5ae8c
commit bfc0455bbf
1 changed files with 35 additions and 0 deletions
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35
include/soc/qcom/of_common.h Normal file
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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2021, The Linux Foundation. All rights reserved.
*/
#ifndef __QCOM_OF_H
#define __QCOM_OF_H
#include <linux/of.h>
/**
* of_fdt_get_ddrtype - Return the type of ddr (4/5) on the current device
*
* On match, returns a non-zero positive value which matches the ddr type.
* Otherwise returns -ENOENT.
*/
static inline int of_fdt_get_ddrtype(void)
{
int ret;
u32 ddr_type;
struct device_node *mem_node;
mem_node = of_find_node_by_path("/memory");
if (!mem_node)
return -ENOENT;
ret = of_property_read_u32(mem_node, "ddr_device_type", &ddr_type);
of_node_put(mem_node);
if (ret < 0)
return -ENOENT;
return ddr_type;
}
#endif