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// SPDX-License-Identifier: GPL-2.0
/*
* Platform thermal driver for GXP.
*
* Copyright (C) 2021-2023 Google LLC
*/
#include <linux/acpm_dvfs.h>
#include <linux/device.h>
#include <linux/minmax.h>
#include <gcip/gcip-pm.h>
#include <gcip/gcip-thermal.h>
#include "gxp-config.h"
#include "gxp-internal.h"
#include "gxp-pm.h"
#include "gxp-thermal.h"
#if GXP_HAS_MCU
#include "gxp-kci.h"
#include "gxp-mcu.h"
#endif /* GXP_HAS_MCU */
static int gxp_thermal_get_rate(void *data, unsigned long *rate)
{
*rate = exynos_acpm_get_rate(AUR_DVFS_DOMAIN, 0);
return 0;
}
static int gxp_thermal_set_rate(void *data, unsigned long rate)
{
struct gxp_dev *gxp = data;
int ret = 0;
dev_warn(gxp->dev, "Received thermal throttling requests %lu", rate);
if (!gxp_is_direct_mode(gxp)) {
#if GXP_HAS_MCU
struct gxp_mcu *mcu = gxp_mcu_of(gxp);
ret = gxp_kci_notify_throttling(&mcu->kci, rate);
#endif /* GXP_HAS_MCU */
} else {
rate = max_t(unsigned long, rate,
aur_power_state2rate[AUR_UUD]);
ret = gxp_pm_blk_set_rate_acpm(gxp, rate);
}
if (ret) {
dev_err(gxp->dev, "error setting gxp cooling state: %d\n", ret);
return ret;
}
gxp_pm_set_thermal_limit(gxp, rate);
return 0;
}
static int gxp_thermal_control(void *data, bool enable)
{
return -EOPNOTSUPP;
}
int gxp_thermal_init(struct gxp_dev *gxp)
{
const struct gcip_thermal_args args = {
.dev = gxp->dev,
.pm = gxp->power_mgr->pm,
.dentry = gxp->d_entry,
.node_name = GXP_COOLING_NAME,
.type = GXP_COOLING_NAME,
.data = gxp,
.get_rate = gxp_thermal_get_rate,
.set_rate = gxp_thermal_set_rate,
.control = gxp_thermal_control,
};
struct gcip_thermal *thermal;
if (gxp->thermal)
return -EEXIST;
thermal = gcip_thermal_create(&args);
if (IS_ERR(thermal))
return PTR_ERR(thermal);
gxp->thermal = thermal;
return 0;
}
void gxp_thermal_exit(struct gxp_dev *gxp)
{
gcip_thermal_destroy(gxp->thermal);
gxp->thermal = NULL;
}
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