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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
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/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
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* Copyright (C) 2019-2020 Linaro Ltd.
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*/
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#include <linux/io.h>
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#include "ipa.h"
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#include "ipa_reg.h"
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int ipa_reg_init(struct ipa *ipa)
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{
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struct device *dev = &ipa->pdev->dev;
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struct resource *res;
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/* Setup IPA register memory */
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res = platform_get_resource_byname(ipa->pdev, IORESOURCE_MEM,
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"ipa-reg");
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if (!res) {
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dev_err(dev, "DT error getting \"ipa-reg\" memory property\n");
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return -ENODEV;
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}
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ipa->reg_virt = ioremap(res->start, resource_size(res));
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if (!ipa->reg_virt) {
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dev_err(dev, "unable to remap \"ipa-reg\" memory\n");
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return -ENOMEM;
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}
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ipa->reg_addr = res->start;
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return 0;
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}
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void ipa_reg_exit(struct ipa *ipa)
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{
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iounmap(ipa->reg_virt);
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}
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