56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Author: Sudeep Holla <sudeep.holla@arm.com>
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* Copyright 2022 Arm Limited
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*/
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#include <linux/kernel.h>
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#include <linux/acpi.h>
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#include <linux/completion.h>
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#include <linux/idr.h>
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#include <linux/io.h>
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#include <linux/arm-smccc.h>
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static struct acpi_ffh_info ffh_ctx;
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int __weak acpi_ffh_address_space_arch_setup(void *handler_ctxt,
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void **region_ctxt)
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{
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return -EOPNOTSUPP;
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}
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int __weak acpi_ffh_address_space_arch_handler(acpi_integer *value,
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void *region_context)
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{
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return -EOPNOTSUPP;
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}
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static acpi_status
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acpi_ffh_address_space_setup(acpi_handle region_handle, u32 function,
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void *handler_context, void **region_context)
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{
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return acpi_ffh_address_space_arch_setup(handler_context,
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region_context);
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}
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static acpi_status
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acpi_ffh_address_space_handler(u32 function, acpi_physical_address addr,
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u32 bits, acpi_integer *value,
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void *handler_context, void *region_context)
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{
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return acpi_ffh_address_space_arch_handler(value, region_context);
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}
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void __init acpi_init_ffh(void)
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{
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acpi_status status;
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status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT,
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ACPI_ADR_SPACE_FIXED_HARDWARE,
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&acpi_ffh_address_space_handler,
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&acpi_ffh_address_space_setup,
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&ffh_ctx);
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if (ACPI_FAILURE(status))
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pr_alert("OperationRegion handler could not be installed\n");
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}
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