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marvell: drivers: Add thermal driver

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Add thermal driver for A8K SoC family.
The termal unit data is used by Marvell DRAM initialization
code for optimizing the memory controller configuration

Change-Id: Iad92689fa6e4224a89d872e9aa015393abd9cf73
Signed-off-by: Hanna Hawa <hannah@marvell.com>
Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
This commit is contained in:
Konstantin Porotchkin 2018-02-26 16:08:26 +02:00
parent 152b0e4717
commit d5a6f86cdf
2 changed files with 85 additions and 0 deletions
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54
drivers/marvell/thermal.c Normal file
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/*
* Copyright (C) 2018 Marvell International Ltd.
*
* SPDX-License-Identifier: BSD-3-Clause
* https://spdx.org/licenses
*/
/* Driver for thermal unit located in Marvell ARMADA 8K and compatible SoCs */
#include <debug.h>
#include <thermal.h>
int marvell_thermal_init(struct tsen_config *tsen_cfg)
{
if (tsen_cfg->tsen_ready == 1) {
INFO("thermal sensor is already initialized\n");
return 0;
}
if (tsen_cfg->ptr_tsen_probe == NULL) {
ERROR("initial thermal sensor configuration is missing\n");
return -1;
}
if (tsen_cfg->ptr_tsen_probe(tsen_cfg)) {
ERROR("thermal sensor initialization failed\n");
return -1;
}
VERBOSE("thermal sensor was initialized\n");
return 0;
}
int marvell_thermal_read(struct tsen_config *tsen_cfg, int *temp)
{
if (temp == NULL) {
ERROR("NULL pointer for temperature read\n");
return -1;
}
if (tsen_cfg->ptr_tsen_read == NULL ||
tsen_cfg->tsen_ready == 0) {
ERROR("thermal sensor was not initialized\n");
return -1;
}
if (tsen_cfg->ptr_tsen_read(tsen_cfg, temp)) {
ERROR("temperature read failed\n");
return -1;
}
return 0;
}

31
include/drivers/marvell/thermal.h Normal file
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/*
* Copyright (C) 2018 Marvell International Ltd.
*
* SPDX-License-Identifier: BSD-3-Clause
* https://spdx.org/licenses
*/
/* Driver for thermal unit located in Marvell ARMADA 8K and compatible SoCs */
#ifndef _THERMAL_H
#define _THERMAL_H
struct tsen_config {
/* thermal temperature parameters */
int tsen_offset;
int tsen_gain;
int tsen_divisor;
/* thermal data */
int tsen_ready;
void *regs_base;
/* thermal functionality */
int (*ptr_tsen_probe)(struct tsen_config *cfg);
int (*ptr_tsen_read)(struct tsen_config *cfg, int *temp);
};
/* Thermal driver APIs */
int marvell_thermal_init(struct tsen_config *tsen_cfg);
int marvell_thermal_read(struct tsen_config *tsen_cfg, int *temp);
struct tsen_config *marvell_thermal_config_get(void);
#endif /* _THERMAL_H */