cdf2e9419d
This patch includes three source files that represent some basic "main
program" code for the IPA driver. They are:
- "ipa.h" defines the top-level IPA structure which represents an IPA
device throughout the code.
- "ipa_main.c" contains the platform driver probe function, along with
some general code used during initialization.
- "ipa_reg.h" defines the offsets of the 32-bit registers used for the
IPA device, along with masks that define the position and width of
fields within these registers.
- "version.h" defines some symbolic IPA version numbers.
Each file includes some documentation that provides a little more
overview of how the code is organized and used.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
39 lines
797 B
C
39 lines
797 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
|
|
* Copyright (C) 2019-2020 Linaro Ltd.
|
|
*/
|
|
|
|
#include <linux/io.h>
|
|
|
|
#include "ipa.h"
|
|
#include "ipa_reg.h"
|
|
|
|
int ipa_reg_init(struct ipa *ipa)
|
|
{
|
|
struct device *dev = &ipa->pdev->dev;
|
|
struct resource *res;
|
|
|
|
/* Setup IPA register memory */
|
|
res = platform_get_resource_byname(ipa->pdev, IORESOURCE_MEM,
|
|
"ipa-reg");
|
|
if (!res) {
|
|
dev_err(dev, "DT error getting \"ipa-reg\" memory property\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
ipa->reg_virt = ioremap(res->start, resource_size(res));
|
|
if (!ipa->reg_virt) {
|
|
dev_err(dev, "unable to remap \"ipa-reg\" memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
ipa->reg_addr = res->start;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ipa_reg_exit(struct ipa *ipa)
|
|
{
|
|
iounmap(ipa->reg_virt);
|
|
}
|