diff options
| author | Atish Patra <atish.patra@wdc.com> | 2021-07-10 09:18:12 -0700 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2021-07-11 10:27:57 +0530 |
| commit | ae72ec091508196e29c07ae46bca106373d31e39 (patch) | |
| tree | 52334794028e4e4f49206d7b4274476e4b108d62 /include | |
| parent | 13d40f21d588e17a31624ed415f114987b6bd3d0 (diff) | |
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sbi_utils/fdt/fdt_pmu.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/include/sbi_utils/fdt/fdt_pmu.h b/include/sbi_utils/fdt/fdt_pmu.h new file mode 100644 index 0000000..2fa01ed --- /dev/null +++ b/include/sbi_utils/fdt/fdt_pmu.h @@ -0,0 +1,46 @@ +// 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 |