drivers/net/ipa/ipa_reg.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
   4  * Copyright (C) 2019-2020 Linaro Ltd.
   5  */
   6
   7 #include <linux/io.h>
   8
   9 #include "ipa.h"
  10 #include "ipa_reg.h"
  11
  12 int ipa_reg_init(struct ipa *ipa)
  13 {
  14         struct device *dev = &ipa->pdev->dev;
  15         struct resource *res;
  16
  17         /* Setup IPA register memory  */
  18         res = platform_get_resource_byname(ipa->pdev, IORESOURCE_MEM,
  19                                            "ipa-reg");
  20         if (!res) {
  21                 dev_err(dev, "DT error getting \"ipa-reg\" memory property\n");
  22                 return -ENODEV;
  23         }
  24
  25         ipa->reg_virt = ioremap(res->start, resource_size(res));
  26         if (!ipa->reg_virt) {
  27                 dev_err(dev, "unable to remap \"ipa-reg\" memory\n");
  28                 return -ENOMEM;
  29         }
  30         ipa->reg_addr = res->start;
  31
  32         return 0;
  33 }
  34
  35 void ipa_reg_exit(struct ipa *ipa)
  36 {
  37         iounmap(ipa->reg_virt);
  38 }