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firmware: exynos-acpm: add DVFS protocol

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Add ACPM DVFS protocol handler. It constructs DVFS messages that
the APM firmware can understand.

Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Reviewed-by: Peter Griffin <peter.griffin@linaro.org>
Tested-by: Peter Griffin <peter.griffin@linaro.org> # on gs101-oriole
Link: https://patch.msgid.link/20251010-acpm-clk-v6-2-321ee8826fd4@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
This commit is contained in:
Tudor Ambarus
2025-10-10 12:46:32 +00:00
committed by Krzysztof Kozlowski
parent 83c4e3c39b
commit 84a222d1b3
5 changed files with 119 additions and 1 deletions
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21
drivers/firmware/samsung/exynos-acpm-dvfs.h Normal file
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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright 2020 Samsung Electronics Co., Ltd.
* Copyright 2020 Google LLC.
* Copyright 2025 Linaro Ltd.
*/
#ifndef __EXYNOS_ACPM_DVFS_H__
#define __EXYNOS_ACPM_DVFS_H__
#include <linux/types.h>
struct acpm_handle;
int acpm_dvfs_set_rate(const struct acpm_handle *handle,
unsigned int acpm_chan_id, unsigned int id,
unsigned long rate);
unsigned long acpm_dvfs_get_rate(const struct acpm_handle *handle,
unsigned int acpm_chan_id,
unsigned int clk_id);
#endif /* __EXYNOS_ACPM_DVFS_H__ */