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/* 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__ */
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