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Diffstat (limited to 'drivers/hwmon/eic7700-pvt.h')
| -rw-r--r-- | drivers/hwmon/eic7700-pvt.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/drivers/hwmon/eic7700-pvt.h b/drivers/hwmon/eic7700-pvt.h new file mode 100644 index 000000000..fb10f9e4e --- /dev/null +++ b/drivers/hwmon/eic7700-pvt.h @@ -0,0 +1,99 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * ESWIN EIC7700 Voltage, Temperature sensor driver + * + * Copyright 2026, Beijing ESWIN Computing Technology Co., Ltd. + */ +#ifndef __HWMON_EIC7700_PVT_H__ +#define __HWMON_EIC7700_PVT_H__ + +#include <linux/completion.h> +#include <linux/hwmon.h> +#include <linux/kernel.h> +#include <linux/time.h> + +/* ESWIN EIC7700 PVT registers and their bitfields */ +#define PVT_TRIM 0x04 +#define PVT_MODE 0x08 +#define PVT_MODE_MASK GENMASK(2, 0) +#define PVT_CTRL_MODE_TEMP 0x0 +#define PVT_CTRL_MODE_VOLT 0x4 +#define PVT_ENA 0x0c +#define PVT_ENA_EN BIT(0) +#define PVT_INT 0x10 +#define PVT_INT_STAT BIT(0) +#define PVT_INT_CLR BIT(1) +#define PVT_DATA 0x14 +#define PVT_DATA_OUT GENMASK(9, 0) + +/* + * PVT sensors-related limits and default values + * @PVT_TEMP_CHS: Number of temperature hwmon channels. + * @PVT_VOLT_CHS: Number of voltage hwmon channels. + * @PVT_TRIM_DEF: Default temperature sensor trim value (set a proper value + * when one is determined for ESWIN EIC7700 SoC). + * @PVT_TOUT_MIN: Minimal timeout between samples in nanoseconds. + */ +#define PVT_TEMP_CHS 1 +#define PVT_VOLT_CHS 1 +#define PVT_TRIM_DEF 0 +#define PVT_TOUT_MIN (NSEC_PER_SEC / 3000) + +/* + * enum pvt_sensor_type - ESWIN EIC7700 PVT sensor types (correspond to each PVT + * sampling mode) + * @PVT_TEMP: PVT Temperature sensor. + * @PVT_VOLT: PVT Voltage sensor. + */ +enum pvt_sensor_type { + PVT_TEMP = 0, + PVT_VOLT +}; + +#define PVT_CLK_NUM 2 + +/* + * struct pvt_sensor_info - ESWIN EIC7700 PVT sensor informational structure + * @channel: Sensor channel ID. + * @label: hwmon sensor label. + * @mode: PVT mode corresponding to the channel. + * @type: Sensor type. + */ +struct pvt_sensor_info { + int channel; + const char *label; + u32 mode; + enum hwmon_sensor_types type; +}; + +#define PVT_SENSOR_INFO(_ch, _label, _type, _mode) \ + { \ + .channel = _ch, \ + .label = _label, \ + .mode = PVT_CTRL_MODE_ ##_mode, \ + .type = _type, \ + } + +/* + * struct pvt_hwmon - Eswin EIC7700 PVT private data + * @dev: device structure of the PVT platform device. + * @hwmon: hwmon device structure. + * @regs: pointer to the Eswin EIC7700 PVT registers region. + * @irq: PVT events IRQ number. + * @clks: PVT clock descriptors. + * @data_cache: data cache in raw format. + * @conversion: data conversion completion. + * @timeout: conversion timeout. + */ +struct pvt_hwmon { + struct device *dev; + struct device *hwmon; + void __iomem *regs; + int irq; + struct clk_bulk_data clks[PVT_CLK_NUM]; + u32 data_cache; + struct completion conversion; + ktime_t timeout; +}; + +#endif /* __HWMON_EIC7700_PVT_H__ */ |