Files
opensbi/include/sbi_utils/fdt/fdt_pmu.h
Atish Patra ae72ec0915 utils: fdt: Add fdt helper functions to parse PMU DT nodes
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>
2021-07-11 10:27:57 +05:30

47 lines
1.0 KiB
C

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