callisto-pm.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Callisto power management implementations.
 *
 * Copyright (C) 2023 Google LLC
 */

#include <bcl.h>
#include <linux/thermal.h> /* for fixing bug in gs_tmu_v3 */
#include <linux/types.h>
#include <soc/google/gs_tmu_v3.h>

#include "gxp-internal.h"
#include "gxp-lpm.h"
#include "gxp-pm.h"

static int callisto_after_blk_power_up(struct gxp_dev *gxp)
{
	int ret;

	if (gxp->power_mgr->bcl_dev) {
		ret = google_init_aur_ratio(gxp->power_mgr->bcl_dev);
		if (ret)
			dev_warn(gxp->dev, "init BCL ratio failed: %d", ret);
	}
	/* Inform TMU the block is up. */
	return set_acpm_tj_power_status(TZ_AUR, true);
}

static int callisto_before_blk_power_down(struct gxp_dev *gxp)
{
	int ret;

	/* Need to put TOP LPM into active state before blk off. */
	if (!gxp_lpm_wait_state_eq(gxp, LPM_PSM_TOP, LPM_ACTIVE_STATE)) {
		dev_err(gxp->dev,
			"failed to force TOP LPM to PS0 during blk down\n");
		return -EAGAIN;
	}

	ret = set_acpm_tj_power_status(TZ_AUR, false);
	if (ret)
		dev_err(gxp->dev,
			"set Tj power status on blk down failed: %d\n", ret);
	return 0;
}

static const struct gxp_pm_ops gxp_pm_ops = {
	.after_blk_power_up = callisto_after_blk_power_up,
	.before_blk_power_down = callisto_before_blk_power_down,
};

void gxp_pm_chip_set_ops(struct gxp_power_manager *mgr)
{
	mgr->ops = &gxp_pm_ops;
}

void gxp_pm_chip_init(struct gxp_dev *gxp)
{
	gxp->power_mgr->bcl_dev = google_retrieve_bcl_handle();
}

void gxp_pm_chip_exit(struct gxp_dev *gxp)
{
}