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Some OPP tables specify voltage for each frequency. Devfreq can handle these regulators but they should be get only 1 time to avoid issue and know who is in charge. If OPP table is probe don't init regulator. Reviewed-by: Steven Price <steven.price@arm.com> Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Signed-off-by: Clément Péron <peron.clem@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org> Link: https://patchwork.freedesktop.org/patch/msgid/20200710095409.407087-11-peron.clem@gmail.com
42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright 2019 Collabora ltd. */
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#ifndef __PANFROST_DEVFREQ_H__
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#define __PANFROST_DEVFREQ_H__
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#include <linux/spinlock.h>
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#include <linux/ktime.h>
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struct devfreq;
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struct opp_table;
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struct thermal_cooling_device;
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struct panfrost_device;
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struct panfrost_devfreq {
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struct devfreq *devfreq;
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struct opp_table *regulators_opp_table;
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struct thermal_cooling_device *cooling;
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bool opp_of_table_added;
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ktime_t busy_time;
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ktime_t idle_time;
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ktime_t time_last_update;
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int busy_count;
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/*
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* Protect busy_time, idle_time, time_last_update and busy_count
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* because these can be updated concurrently between multiple jobs.
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*/
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spinlock_t lock;
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};
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int panfrost_devfreq_init(struct panfrost_device *pfdev);
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void panfrost_devfreq_fini(struct panfrost_device *pfdev);
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void panfrost_devfreq_resume(struct panfrost_device *pfdev);
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void panfrost_devfreq_suspend(struct panfrost_device *pfdev);
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void panfrost_devfreq_record_busy(struct panfrost_devfreq *devfreq);
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void panfrost_devfreq_record_idle(struct panfrost_devfreq *devfreq);
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#endif /* __PANFROST_DEVFREQ_H__ */
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