diff --git a/drivers/marvell/thermal.c b/drivers/marvell/thermal.c new file mode 100644 index 000000000..c7ceb9291 --- /dev/null +++ b/drivers/marvell/thermal.c @@ -0,0 +1,54 @@ +/* + * 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 +#include + +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; +} diff --git a/include/drivers/marvell/thermal.h b/include/drivers/marvell/thermal.h new file mode 100644 index 000000000..191f97bab --- /dev/null +++ b/include/drivers/marvell/thermal.h @@ -0,0 +1,31 @@ +/* + * 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 */