mirror of https://gitee.com/openkylin/linux.git
248 lines
7.4 KiB
C
248 lines
7.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2020 BAIKAL ELECTRONICS, JSC
|
|
*
|
|
* Baikal-T1 Process, Voltage, Temperature sensor driver
|
|
*/
|
|
#ifndef __HWMON_BT1_PVT_H__
|
|
#define __HWMON_BT1_PVT_H__
|
|
|
|
#include <linux/completion.h>
|
|
#include <linux/hwmon.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/ktime.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/seqlock.h>
|
|
|
|
/* Baikal-T1 PVT registers and their bitfields */
|
|
#define PVT_CTRL 0x00
|
|
#define PVT_CTRL_EN BIT(0)
|
|
#define PVT_CTRL_MODE_FLD 1
|
|
#define PVT_CTRL_MODE_MASK GENMASK(3, PVT_CTRL_MODE_FLD)
|
|
#define PVT_CTRL_MODE_TEMP 0x0
|
|
#define PVT_CTRL_MODE_VOLT 0x1
|
|
#define PVT_CTRL_MODE_LVT 0x2
|
|
#define PVT_CTRL_MODE_HVT 0x4
|
|
#define PVT_CTRL_MODE_SVT 0x6
|
|
#define PVT_CTRL_TRIM_FLD 4
|
|
#define PVT_CTRL_TRIM_MASK GENMASK(8, PVT_CTRL_TRIM_FLD)
|
|
#define PVT_DATA 0x04
|
|
#define PVT_DATA_VALID BIT(10)
|
|
#define PVT_DATA_DATA_FLD 0
|
|
#define PVT_DATA_DATA_MASK GENMASK(9, PVT_DATA_DATA_FLD)
|
|
#define PVT_TTHRES 0x08
|
|
#define PVT_VTHRES 0x0C
|
|
#define PVT_LTHRES 0x10
|
|
#define PVT_HTHRES 0x14
|
|
#define PVT_STHRES 0x18
|
|
#define PVT_THRES_LO_FLD 0
|
|
#define PVT_THRES_LO_MASK GENMASK(9, PVT_THRES_LO_FLD)
|
|
#define PVT_THRES_HI_FLD 10
|
|
#define PVT_THRES_HI_MASK GENMASK(19, PVT_THRES_HI_FLD)
|
|
#define PVT_TTIMEOUT 0x1C
|
|
#define PVT_INTR_STAT 0x20
|
|
#define PVT_INTR_MASK 0x24
|
|
#define PVT_RAW_INTR_STAT 0x28
|
|
#define PVT_INTR_DVALID BIT(0)
|
|
#define PVT_INTR_TTHRES_LO BIT(1)
|
|
#define PVT_INTR_TTHRES_HI BIT(2)
|
|
#define PVT_INTR_VTHRES_LO BIT(3)
|
|
#define PVT_INTR_VTHRES_HI BIT(4)
|
|
#define PVT_INTR_LTHRES_LO BIT(5)
|
|
#define PVT_INTR_LTHRES_HI BIT(6)
|
|
#define PVT_INTR_HTHRES_LO BIT(7)
|
|
#define PVT_INTR_HTHRES_HI BIT(8)
|
|
#define PVT_INTR_STHRES_LO BIT(9)
|
|
#define PVT_INTR_STHRES_HI BIT(10)
|
|
#define PVT_INTR_ALL GENMASK(10, 0)
|
|
#define PVT_CLR_INTR 0x2C
|
|
|
|
/*
|
|
* PVT sensors-related limits and default values
|
|
* @PVT_TEMP_MIN: Minimal temperature in millidegrees of Celsius.
|
|
* @PVT_TEMP_MAX: Maximal temperature in millidegrees of Celsius.
|
|
* @PVT_TEMP_CHS: Number of temperature hwmon channels.
|
|
* @PVT_VOLT_MIN: Minimal voltage in mV.
|
|
* @PVT_VOLT_MAX: Maximal voltage in mV.
|
|
* @PVT_VOLT_CHS: Number of voltage hwmon channels.
|
|
* @PVT_DATA_MIN: Minimal PVT raw data value.
|
|
* @PVT_DATA_MAX: Maximal PVT raw data value.
|
|
* @PVT_TRIM_MIN: Minimal temperature sensor trim value.
|
|
* @PVT_TRIM_MAX: Maximal temperature sensor trim value.
|
|
* @PVT_TRIM_DEF: Default temperature sensor trim value (set a proper value
|
|
* when one is determined for Baikal-T1 SoC).
|
|
* @PVT_TRIM_TEMP: Maximum temperature encoded by the trim factor.
|
|
* @PVT_TRIM_STEP: Temperature stride corresponding to the trim value.
|
|
* @PVT_TOUT_MIN: Minimal timeout between samples in nanoseconds.
|
|
* @PVT_TOUT_DEF: Default data measurements timeout. In case if alarms are
|
|
* activated the PVT IRQ is enabled to be raised after each
|
|
* conversion in order to have the thresholds checked and the
|
|
* converted value cached. Too frequent conversions may cause
|
|
* the system CPU overload. Lets set the 50ms delay between
|
|
* them by default to prevent this.
|
|
*/
|
|
#define PVT_TEMP_MIN -48380L
|
|
#define PVT_TEMP_MAX 147438L
|
|
#define PVT_TEMP_CHS 1
|
|
#define PVT_VOLT_MIN 620L
|
|
#define PVT_VOLT_MAX 1168L
|
|
#define PVT_VOLT_CHS 4
|
|
#define PVT_DATA_MIN 0
|
|
#define PVT_DATA_MAX (PVT_DATA_DATA_MASK >> PVT_DATA_DATA_FLD)
|
|
#define PVT_TRIM_MIN 0
|
|
#define PVT_TRIM_MAX (PVT_CTRL_TRIM_MASK >> PVT_CTRL_TRIM_FLD)
|
|
#define PVT_TRIM_TEMP 7130
|
|
#define PVT_TRIM_STEP (PVT_TRIM_TEMP / PVT_TRIM_MAX)
|
|
#define PVT_TRIM_DEF 0
|
|
#define PVT_TOUT_MIN (NSEC_PER_SEC / 3000)
|
|
#if defined(CONFIG_SENSORS_BT1_PVT_ALARMS)
|
|
# define PVT_TOUT_DEF 60000
|
|
#else
|
|
# define PVT_TOUT_DEF 0
|
|
#endif
|
|
|
|
/*
|
|
* enum pvt_sensor_type - Baikal-T1 PVT sensor types (correspond to each PVT
|
|
* sampling mode)
|
|
* @PVT_SENSOR*: helpers to traverse the sensors in loops.
|
|
* @PVT_TEMP: PVT Temperature sensor.
|
|
* @PVT_VOLT: PVT Voltage sensor.
|
|
* @PVT_LVT: PVT Low-Voltage threshold sensor.
|
|
* @PVT_HVT: PVT High-Voltage threshold sensor.
|
|
* @PVT_SVT: PVT Standard-Voltage threshold sensor.
|
|
*/
|
|
enum pvt_sensor_type {
|
|
PVT_SENSOR_FIRST,
|
|
PVT_TEMP = PVT_SENSOR_FIRST,
|
|
PVT_VOLT,
|
|
PVT_LVT,
|
|
PVT_HVT,
|
|
PVT_SVT,
|
|
PVT_SENSOR_LAST = PVT_SVT,
|
|
PVT_SENSORS_NUM
|
|
};
|
|
|
|
/*
|
|
* enum pvt_clock_type - Baikal-T1 PVT clocks.
|
|
* @PVT_CLOCK_APB: APB clock.
|
|
* @PVT_CLOCK_REF: PVT reference clock.
|
|
*/
|
|
enum pvt_clock_type {
|
|
PVT_CLOCK_APB,
|
|
PVT_CLOCK_REF,
|
|
PVT_CLOCK_NUM
|
|
};
|
|
|
|
/*
|
|
* struct pvt_sensor_info - Baikal-T1 PVT sensor informational structure
|
|
* @channel: Sensor channel ID.
|
|
* @label: hwmon sensor label.
|
|
* @mode: PVT mode corresponding to the channel.
|
|
* @thres_base: upper and lower threshold values of the sensor.
|
|
* @thres_sts_lo: low threshold status bitfield.
|
|
* @thres_sts_hi: high threshold status bitfield.
|
|
* @type: Sensor type.
|
|
* @attr_min_alarm: Min alarm attribute ID.
|
|
* @attr_min_alarm: Max alarm attribute ID.
|
|
*/
|
|
struct pvt_sensor_info {
|
|
int channel;
|
|
const char *label;
|
|
u32 mode;
|
|
unsigned long thres_base;
|
|
u32 thres_sts_lo;
|
|
u32 thres_sts_hi;
|
|
enum hwmon_sensor_types type;
|
|
u32 attr_min_alarm;
|
|
u32 attr_max_alarm;
|
|
};
|
|
|
|
#define PVT_SENSOR_INFO(_ch, _label, _type, _mode, _thres) \
|
|
{ \
|
|
.channel = _ch, \
|
|
.label = _label, \
|
|
.mode = PVT_CTRL_MODE_ ##_mode, \
|
|
.thres_base = PVT_ ##_thres, \
|
|
.thres_sts_lo = PVT_INTR_ ##_thres## _LO, \
|
|
.thres_sts_hi = PVT_INTR_ ##_thres## _HI, \
|
|
.type = _type, \
|
|
.attr_min_alarm = _type## _min, \
|
|
.attr_max_alarm = _type## _max, \
|
|
}
|
|
|
|
/*
|
|
* struct pvt_cache - PVT sensors data cache
|
|
* @data: data cache in raw format.
|
|
* @thres_sts_lo: low threshold status saved on the previous data conversion.
|
|
* @thres_sts_hi: high threshold status saved on the previous data conversion.
|
|
* @data_seqlock: cached data seq-lock.
|
|
* @conversion: data conversion completion.
|
|
*/
|
|
struct pvt_cache {
|
|
u32 data;
|
|
#if defined(CONFIG_SENSORS_BT1_PVT_ALARMS)
|
|
seqlock_t data_seqlock;
|
|
u32 thres_sts_lo;
|
|
u32 thres_sts_hi;
|
|
#else
|
|
struct completion conversion;
|
|
#endif
|
|
};
|
|
|
|
/*
|
|
* struct pvt_hwmon - Baikal-T1 PVT private data
|
|
* @dev: device structure of the PVT platform device.
|
|
* @hwmon: hwmon device structure.
|
|
* @regs: pointer to the Baikal-T1 PVT registers region.
|
|
* @irq: PVT events IRQ number.
|
|
* @clks: Array of the PVT clocks descriptor (APB/ref clocks).
|
|
* @ref_clk: Pointer to the reference clocks descriptor.
|
|
* @iface_mtx: Generic interface mutex (used to lock the alarm registers
|
|
* when the alarms enabled, or the data conversion interface
|
|
* if alarms are disabled).
|
|
* @sensor: current PVT sensor the data conversion is being performed for.
|
|
* @cache: data cache descriptor.
|
|
* @timeout: conversion timeout cache.
|
|
*/
|
|
struct pvt_hwmon {
|
|
struct device *dev;
|
|
struct device *hwmon;
|
|
|
|
void __iomem *regs;
|
|
int irq;
|
|
|
|
struct clk_bulk_data clks[PVT_CLOCK_NUM];
|
|
|
|
struct mutex iface_mtx;
|
|
enum pvt_sensor_type sensor;
|
|
struct pvt_cache cache[PVT_SENSORS_NUM];
|
|
ktime_t timeout;
|
|
};
|
|
|
|
/*
|
|
* struct pvt_poly_term - a term descriptor of the PVT data translation
|
|
* polynomial
|
|
* @deg: degree of the term.
|
|
* @coef: multiplication factor of the term.
|
|
* @divider: distributed divider per each degree.
|
|
* @divider_leftover: divider leftover, which couldn't be redistributed.
|
|
*/
|
|
struct pvt_poly_term {
|
|
unsigned int deg;
|
|
long coef;
|
|
long divider;
|
|
long divider_leftover;
|
|
};
|
|
|
|
/*
|
|
* struct pvt_poly - PVT data translation polynomial descriptor
|
|
* @total_divider: total data divider.
|
|
* @terms: polynomial terms up to a free one.
|
|
*/
|
|
struct pvt_poly {
|
|
long total_divider;
|
|
struct pvt_poly_term terms[];
|
|
};
|
|
|
|
#endif /* __HWMON_BT1_PVT_H__ */
|