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ae72ec0915
The PMU DT node bindings are defined in docs/pmu_support.md Add few fdt helper functions to parse the DT node and update the event-counter mapping tables. Reviewed-by: Anup Patel <anup.patel@wdc.com> Signed-off-by: Atish Patra <atish.patra@wdc.com>
47 lines
1.0 KiB
C
47 lines
1.0 KiB
C
// SPDX-License-Identifier: BSD-2-Clause
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/*
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* fdt_pmu.c - Flat Device Tree PMU helper routines
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*
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* Copyright (c) 2021 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Atish Patra <atish.patra@wdc.com>
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*/
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#ifndef __FDT_PMU_H__
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#define __FDT_PMU_H__
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#include <sbi/sbi_types.h>
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/**
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* Fix up the PMU node in the device tree
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*
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* This routine:
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* 1. Disables opensbi specific properties from the DT
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*
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* It is recommended that platform support call this function in
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* their final_init() platform operation.
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*
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* @param fdt device tree blob
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*/
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void fdt_pmu_fixup(void *fdt);
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/**
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* Setup PMU data from device tree
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*
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* @param fdt device tree blob
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*
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* @return 0 on success and negative error code on failure
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*/
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int fdt_pmu_setup(void *fdt);
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/**
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* Get the mhpmevent select value read from DT for a given event
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* @param event_idx Event ID of the given event
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*
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* @return The select value read from DT or 0 if given index was not found
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*/
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uint64_t fdt_pmu_get_select_value(uint32_t event_idx);
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#endif
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