linux/drivers/net/ipa/ipa_reg.c
Alex Elder cdf2e9419d soc: qcom: ipa: main code
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>
2020-03-08 22:07:09 -07:00

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);
}