// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright ( c ) 2020 Linaro Limited
*
* Based on original driver :
* Copyright ( c ) 2012 - 2020 , The Linux Foundation . All rights reserved .
*
* Copyright ( c ) 2022 Qualcomm Innovation Center , Inc . All rights reserved .
*/
#include <linux/bitfield.h>
#include <linux/iio/adc/qcom-vadc-common.h>
#include <linux/iio/consumer.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/thermal.h>
#include <linux/unaligned.h>
#include "../thermal_hwmon.h"
/*
* Thermal monitoring block consists of 8 ( ADC_TM5_NUM_CHANNELS ) channels . Each
* channel is programmed to use one of ADC channels for voltage comparison .
* Voltages are programmed using ADC codes , so we have to convert temp to
* voltage and then to ADC code value .
*
* Configuration of TM channels must match configuration of corresponding ADC
* channels .
*/
#define ADC5_MAX_CHANNEL 0 xc0
#define ADC_TM5_NUM_CHANNELS 8
#define ADC_TM5_STATUS_LOW 0 x0a
#define ADC_TM5_STATUS_HIGH 0 x0b
#define ADC_TM5_NUM_BTM 0 x0f
#define ADC_TM5_ADC_DIG_PARAM 0 x42
#define ADC_TM5_FAST_AVG_CTL (ADC_TM5_ADC_DIG_PARAM + 1 )
#define ADC_TM5_FAST_AVG_EN BIT(7 )
#define ADC_TM5_MEAS_INTERVAL_CTL (ADC_TM5_ADC_DIG_PARAM + 2 )
#define ADC_TM5_TIMER1 3 /* 3.9ms */
#define ADC_TM5_MEAS_INTERVAL_CTL2 (ADC_TM5_ADC_DIG_PARAM + 3 )
#define ADC_TM5_MEAS_INTERVAL_CTL2_MASK 0 xf0
#define ADC_TM5_TIMER2 10 /* 1 second */
#define ADC_TM5_MEAS_INTERVAL_CTL3_MASK 0 xf
#define ADC_TM5_TIMER3 4 /* 4 second */
#define ADC_TM_EN_CTL1 0 x46
#define ADC_TM_EN BIT(7 )
#define ADC_TM_CONV_REQ 0 x47
#define ADC_TM_CONV_REQ_EN BIT(7 )
#define ADC_TM5_M_CHAN_BASE 0 x60
#define ADC_TM5_M_ADC_CH_SEL_CTL(n) (ADC_TM5_M_CHAN_BASE + ((n) * 8 ) + 0 )
#define ADC_TM5_M_LOW_THR0(n) (ADC_TM5_M_CHAN_BASE + ((n) * 8 ) + 1 )
#define ADC_TM5_M_LOW_THR1(n) (ADC_TM5_M_CHAN_BASE + ((n) * 8 ) + 2 )
#define ADC_TM5_M_HIGH_THR0(n) (ADC_TM5_M_CHAN_BASE + ((n) * 8 ) + 3 )
#define ADC_TM5_M_HIGH_THR1(n) (ADC_TM5_M_CHAN_BASE + ((n) * 8 ) + 4 )
#define ADC_TM5_M_MEAS_INTERVAL_CTL(n) (ADC_TM5_M_CHAN_BASE + ((n) * 8 ) + 5 )
#define ADC_TM5_M_CTL(n) (ADC_TM5_M_CHAN_BASE + ((n) * 8 ) + 6 )
#define ADC_TM5_M_CTL_HW_SETTLE_DELAY_MASK 0 xf
#define ADC_TM5_M_CTL_CAL_SEL_MASK 0 x30
#define ADC_TM5_M_CTL_CAL_VAL 0 x40
#define ADC_TM5_M_EN(n) (ADC_TM5_M_CHAN_BASE + ((n) * 8 ) + 7 )
#define ADC_TM5_M_MEAS_EN BIT(7 )
#define ADC_TM5_M_HIGH_THR_INT_EN BIT(1 )
#define ADC_TM5_M_LOW_THR_INT_EN BIT(0 )
#define ADC_TM_GEN2_STATUS1 0 x08
#define ADC_TM_GEN2_STATUS_LOW_SET 0 x09
#define ADC_TM_GEN2_STATUS_LOW_CLR 0 x0a
#define ADC_TM_GEN2_STATUS_HIGH_SET 0 x0b
#define ADC_TM_GEN2_STATUS_HIGH_CLR 0 x0c
#define ADC_TM_GEN2_CFG_HS_SET 0 x0d
#define ADC_TM_GEN2_CFG_HS_FLAG BIT(0 )
#define ADC_TM_GEN2_CFG_HS_CLR 0 x0e
#define ADC_TM_GEN2_SID 0 x40
#define ADC_TM_GEN2_CH_CTL 0 x41
#define ADC_TM_GEN2_TM_CH_SEL GENMASK(7 , 5 )
#define ADC_TM_GEN2_MEAS_INT_SEL GENMASK(3 , 2 )
#define ADC_TM_GEN2_ADC_DIG_PARAM 0 x42
#define ADC_TM_GEN2_CTL_CAL_SEL GENMASK(5 , 4 )
#define ADC_TM_GEN2_CTL_DEC_RATIO_MASK GENMASK(3 , 2 )
#define ADC_TM_GEN2_FAST_AVG_CTL 0 x43
#define ADC_TM_GEN2_FAST_AVG_EN BIT(7 )
#define ADC_TM_GEN2_ADC_CH_SEL_CTL 0 x44
#define ADC_TM_GEN2_DELAY_CTL 0 x45
#define ADC_TM_GEN2_HW_SETTLE_DELAY GENMASK(3 , 0 )
#define ADC_TM_GEN2_EN_CTL1 0 x46
#define ADC_TM_GEN2_EN BIT(7 )
#define ADC_TM_GEN2_CONV_REQ 0 x47
#define ADC_TM_GEN2_CONV_REQ_EN BIT(7 )
#define ADC_TM_GEN2_LOW_THR0 0 x49
#define ADC_TM_GEN2_LOW_THR1 0 x4a
#define ADC_TM_GEN2_HIGH_THR0 0 x4b
#define ADC_TM_GEN2_HIGH_THR1 0 x4c
#define ADC_TM_GEN2_LOWER_MASK(n) ((n) & GENMASK(7 , 0 ))
#define ADC_TM_GEN2_UPPER_MASK(n) (((n) & GENMASK(15 , 8 )) >> 8 )
#define ADC_TM_GEN2_MEAS_IRQ_EN 0 x4d
#define ADC_TM_GEN2_MEAS_EN BIT(7 )
#define ADC_TM5_GEN2_HIGH_THR_INT_EN BIT(1 )
#define ADC_TM5_GEN2_LOW_THR_INT_EN BIT(0 )
#define ADC_TM_GEN2_MEAS_INT_LSB 0 x50
#define ADC_TM_GEN2_MEAS_INT_MSB 0 x51
#define ADC_TM_GEN2_MEAS_INT_MODE 0 x52
#define ADC_TM_GEN2_Mn_DATA0(n) ((n * 2 ) + 0 xa0)
#define ADC_TM_GEN2_Mn_DATA1(n) ((n * 2 ) + 0 xa1)
#define ADC_TM_GEN2_DATA_SHIFT 8
enum adc5_timer_select {
ADC5_TIMER_SEL_1 = 0 ,
ADC5_TIMER_SEL_2,
ADC5_TIMER_SEL_3,
ADC5_TIMER_SEL_NONE,
};
enum adc5_gen {
ADC_TM5,
ADC_TM_HC,
ADC_TM5_GEN2,
ADC_TM5_MAX
};
enum adc_tm5_cal_method {
ADC_TM5_NO_CAL = 0 ,
ADC_TM5_RATIOMETRIC_CAL,
ADC_TM5_ABSOLUTE_CAL
};
enum adc_tm_gen2_time_select {
MEAS_INT_50MS = 0 ,
MEAS_INT_100MS,
MEAS_INT_1S,
MEAS_INT_SET,
MEAS_INT_NONE,
};
struct adc_tm5_chip;
struct adc_tm5_channel;
struct adc_tm5_data {
const u32 full_scale_code_volt;
unsigned int *decimation;
unsigned int *hw_settle;
int (*disable_channel)(struct adc_tm5_channel *channel);
int (*configure)(struct adc_tm5_channel *channel, int low, int high);
irqreturn_t (*isr)(int irq, void *data);
int (*init)(struct adc_tm5_chip *chip);
char *irq_name;
int gen;
};
/**
* struct adc_tm5_channel - ADC Thermal Monitoring channel data .
* @ channel : channel number .
* @ adc_channel : corresponding ADC channel number .
* @ cal_method : calibration method .
* @ prescale : channel scaling performed on the input signal .
* @ hw_settle_time : the time between AMUX being configured and the
* start of conversion .
* @ decimation : sampling rate supported for the channel .
* @ avg_samples : ability to provide single result from the ADC
* that is an average of multiple measurements .
* @ high_thr_en : channel upper voltage threshold enable state .
* @ low_thr_en : channel lower voltage threshold enable state .
* @ meas_en : recurring measurement enable state
* @ iio : IIO channel instance used by this channel .
* @ chip : ADC TM chip instance .
* @ tzd : thermal zone device used by this channel .
*/
struct adc_tm5_channel {
unsigned int channel;
unsigned int adc_channel;
enum adc_tm5_cal_method cal_method;
unsigned int prescale;
unsigned int hw_settle_time;
unsigned int decimation; /* For Gen2 ADC_TM */
unsigned int avg_samples; /* For Gen2 ADC_TM */
bool high_thr_en; /* For Gen2 ADC_TM */
bool low_thr_en; /* For Gen2 ADC_TM */
bool meas_en; /* For Gen2 ADC_TM */
struct iio_channel *iio;
struct adc_tm5_chip *chip;
struct thermal_zone_device *tzd;
};
/**
* struct adc_tm5_chip - ADC Thermal Monitoring properties
* @ regmap : SPMI ADC5 Thermal Monitoring peripheral register map field .
* @ dev : SPMI ADC5 device .
* @ data : software configuration data .
* @ channels : array of ADC TM channel data .
* @ nchannels : amount of channels defined / allocated
* @ decimation : sampling rate supported for the channel .
* Applies to all channels , used only on Gen1 ADC_TM .
* @ avg_samples : ability to provide single result from the ADC
* that is an average of multiple measurements . Applies to all
* channels , used only on Gen1 ADC_TM .
* @ base : base address of TM registers .
* @ adc_mutex_lock : ADC_TM mutex lock , used only on Gen2 ADC_TM .
* It is used to ensure only one ADC channel configuration
* is done at a time using the shared set of configuration
* registers .
*/
struct adc_tm5_chip {
struct regmap *regmap;
struct device *dev;
const struct adc_tm5_data *data;
struct adc_tm5_channel *channels;
unsigned int nchannels;
unsigned int decimation;
unsigned int avg_samples;
u16 base;
struct mutex adc_mutex_lock;
};
static int adc_tm5_read(struct adc_tm5_chip *adc_tm, u16 offset, u8 *data, int len)
{
return regmap_bulk_read(adc_tm->regmap, adc_tm->base + offset, data, len);
}
static int adc_tm5_write(struct adc_tm5_chip *adc_tm, u16 offset, u8 *data, int len)
{
return regmap_bulk_write(adc_tm->regmap, adc_tm->base + offset, data, len);
}
static int adc_tm5_reg_update(struct adc_tm5_chip *adc_tm, u16 offset, u8 mask, u8 val)
{
return regmap_write_bits(adc_tm->regmap, adc_tm->base + offset, mask, val);
}
static irqreturn_t adc_tm5_isr(int irq, void *data)
{
struct adc_tm5_chip *chip = data;
u8 status_low, status_high, ctl;
int ret, i;
ret = adc_tm5_read(chip, ADC_TM5_STATUS_LOW, &status_low, sizeof (status_low));
if (unlikely(ret)) {
dev_err(chip->dev, "read status low failed: %d\n" , ret);
return IRQ_HANDLED;
}
ret = adc_tm5_read(chip, ADC_TM5_STATUS_HIGH, &status_high, sizeof (status_high));
if (unlikely(ret)) {
dev_err(chip->dev, "read status high failed: %d\n" , ret);
return IRQ_HANDLED;
}
for (i = 0 ; i < chip->nchannels; i++) {
bool upper_set = false , lower_set = false ;
unsigned int ch = chip->channels[i].channel;
/* No TZD, we warned at the boot time */
if (!chip->channels[i].tzd)
continue ;
ret = adc_tm5_read(chip, ADC_TM5_M_EN(ch), &ctl, sizeof (ctl));
if (unlikely(ret)) {
dev_err(chip->dev, "ctl read failed: %d, channel %d\n" , ret, i);
continue ;
}
if (!(ctl & ADC_TM5_M_MEAS_EN))
continue ;
lower_set = (status_low & BIT(ch)) &&
(ctl & ADC_TM5_M_LOW_THR_INT_EN);
upper_set = (status_high & BIT(ch)) &&
(ctl & ADC_TM5_M_HIGH_THR_INT_EN);
if (upper_set || lower_set)
thermal_zone_device_update(chip->channels[i].tzd,
THERMAL_EVENT_UNSPECIFIED);
}
return IRQ_HANDLED;
}
static irqreturn_t adc_tm5_gen2_isr(int irq, void *data)
{
struct adc_tm5_chip *chip = data;
u8 status_low, status_high;
int ret, i;
ret = adc_tm5_read(chip, ADC_TM_GEN2_STATUS_LOW_CLR, &status_low, sizeof (status_low));
if (ret) {
dev_err(chip->dev, "read status_low failed: %d\n" , ret);
return IRQ_HANDLED;
}
ret = adc_tm5_read(chip, ADC_TM_GEN2_STATUS_HIGH_CLR, &status_high, sizeof (status_high));
if (ret) {
dev_err(chip->dev, "read status_high failed: %d\n" , ret);
return IRQ_HANDLED;
}
ret = adc_tm5_write(chip, ADC_TM_GEN2_STATUS_LOW_CLR, &status_low, sizeof (status_low));
if (ret < 0 ) {
dev_err(chip->dev, "clear status low failed with %d\n" , ret);
return IRQ_HANDLED;
}
ret = adc_tm5_write(chip, ADC_TM_GEN2_STATUS_HIGH_CLR, &status_high, sizeof (status_high));
if (ret < 0 ) {
dev_err(chip->dev, "clear status high failed with %d\n" , ret);
return IRQ_HANDLED;
}
for (i = 0 ; i < chip->nchannels; i++) {
bool upper_set = false , lower_set = false ;
unsigned int ch = chip->channels[i].channel;
/* No TZD, we warned at the boot time */
if (!chip->channels[i].tzd)
continue ;
if (!chip->channels[i].meas_en)
continue ;
lower_set = (status_low & BIT(ch)) &&
(chip->channels[i].low_thr_en);
upper_set = (status_high & BIT(ch)) &&
(chip->channels[i].high_thr_en);
if (upper_set || lower_set)
thermal_zone_device_update(chip->channels[i].tzd,
THERMAL_EVENT_UNSPECIFIED);
}
return IRQ_HANDLED;
}
static int adc_tm5_get_temp(struct thermal_zone_device *tz, int *temp)
{
struct adc_tm5_channel *channel = thermal_zone_device_priv(tz);
int ret;
if (!channel || !channel->iio)
return -EINVAL;
ret = iio_read_channel_processed(channel->iio, temp);
if (ret < 0 )
return ret;
if (ret != IIO_VAL_INT)
return -EINVAL;
return 0 ;
}
static int adc_tm5_disable_channel(struct adc_tm5_channel *channel)
{
struct adc_tm5_chip *chip = channel->chip;
unsigned int reg = ADC_TM5_M_EN(channel->channel);
return adc_tm5_reg_update(chip, reg,
ADC_TM5_M_MEAS_EN |
ADC_TM5_M_HIGH_THR_INT_EN |
ADC_TM5_M_LOW_THR_INT_EN,
0 );
}
#define ADC_TM_GEN2_POLL_DELAY_MIN_US 100
#define ADC_TM_GEN2_POLL_DELAY_MAX_US 110
#define ADC_TM_GEN2_POLL_RETRY_COUNT 3
static int32_t adc_tm5_gen2_conv_req(struct adc_tm5_chip *chip)
{
int ret;
u8 data;
unsigned int count;
data = ADC_TM_GEN2_EN;
ret = adc_tm5_write(chip, ADC_TM_GEN2_EN_CTL1, &data, 1 );
if (ret < 0 ) {
dev_err(chip->dev, "adc-tm enable failed with %d\n" , ret);
return ret;
}
data = ADC_TM_GEN2_CFG_HS_FLAG;
ret = adc_tm5_write(chip, ADC_TM_GEN2_CFG_HS_SET, &data, 1 );
if (ret < 0 ) {
dev_err(chip->dev, "adc-tm handshake failed with %d\n" , ret);
return ret;
}
data = ADC_TM_GEN2_CONV_REQ_EN;
ret = adc_tm5_write(chip, ADC_TM_GEN2_CONV_REQ, &data, 1 );
if (ret < 0 ) {
dev_err(chip->dev, "adc-tm request conversion failed with %d\n" , ret);
return ret;
}
/*
* SW sets a handshake bit and waits for PBS to clear it
* before the next conversion request can be queued .
*/
for (count = 0 ; count < ADC_TM_GEN2_POLL_RETRY_COUNT; count++) {
ret = adc_tm5_read(chip, ADC_TM_GEN2_CFG_HS_SET, &data, sizeof (data));
if (ret < 0 ) {
dev_err(chip->dev, "adc-tm read failed with %d\n" , ret);
return ret;
}
if (!(data & ADC_TM_GEN2_CFG_HS_FLAG))
return ret;
usleep_range(ADC_TM_GEN2_POLL_DELAY_MIN_US,
ADC_TM_GEN2_POLL_DELAY_MAX_US);
}
dev_err(chip->dev, "adc-tm conversion request handshake timed out\n" );
return -ETIMEDOUT;
}
static int adc_tm5_gen2_disable_channel(struct adc_tm5_channel *channel)
{
struct adc_tm5_chip *chip = channel->chip;
int ret;
u8 val;
mutex_lock(&chip->adc_mutex_lock);
channel->meas_en = false ;
channel->high_thr_en = false ;
channel->low_thr_en = false ;
ret = adc_tm5_read(chip, ADC_TM_GEN2_CH_CTL, &val, sizeof (val));
if (ret < 0 ) {
dev_err(chip->dev, "adc-tm block read failed with %d\n" , ret);
goto disable_fail;
}
val &= ~ADC_TM_GEN2_TM_CH_SEL;
val |= FIELD_PREP(ADC_TM_GEN2_TM_CH_SEL, channel->channel);
ret = adc_tm5_write(chip, ADC_TM_GEN2_CH_CTL, &val, 1 );
if (ret < 0 ) {
dev_err(chip->dev, "adc-tm channel disable failed with %d\n" , ret);
goto disable_fail;
}
val = 0 ;
ret = adc_tm5_write(chip, ADC_TM_GEN2_MEAS_IRQ_EN, &val, 1 );
if (ret < 0 ) {
dev_err(chip->dev, "adc-tm interrupt disable failed with %d\n" , ret);
goto disable_fail;
}
ret = adc_tm5_gen2_conv_req(channel->chip);
if (ret < 0 )
dev_err(chip->dev, "adc-tm channel configure failed with %d\n" , ret);
disable_fail:
mutex_unlock(&chip->adc_mutex_lock);
return ret;
}
static int adc_tm5_enable(struct adc_tm5_chip *chip)
{
int ret;
u8 data;
data = ADC_TM_EN;
ret = adc_tm5_write(chip, ADC_TM_EN_CTL1, &data, sizeof (data));
if (ret < 0 ) {
dev_err(chip->dev, "adc-tm enable failed\n" );
return ret;
}
data = ADC_TM_CONV_REQ_EN;
ret = adc_tm5_write(chip, ADC_TM_CONV_REQ, &data, sizeof (data));
if (ret < 0 ) {
dev_err(chip->dev, "adc-tm request conversion failed\n" );
return ret;
}
return 0 ;
}
static int adc_tm5_configure(struct adc_tm5_channel *channel, int low, int high)
{
struct adc_tm5_chip *chip = channel->chip;
u8 buf[8 ];
u16 reg = ADC_TM5_M_ADC_CH_SEL_CTL(channel->channel);
int ret;
ret = adc_tm5_read(chip, reg, buf, sizeof (buf));
if (ret) {
dev_err(chip->dev, "channel %d params read failed: %d\n" , channel->channel, ret);
return ret;
}
buf[0 ] = channel->adc_channel;
/* High temperature corresponds to low voltage threshold */
if (high != INT_MAX) {
u16 adc_code = qcom_adc_tm5_temp_volt_scale(channel->prescale,
chip->data->full_scale_code_volt, high);
put_unaligned_le16(adc_code, &buf[1 ]);
buf[7 ] |= ADC_TM5_M_LOW_THR_INT_EN;
} else {
buf[7 ] &= ~ADC_TM5_M_LOW_THR_INT_EN;
}
/* Low temperature corresponds to high voltage threshold */
if (low != -INT_MAX) {
u16 adc_code = qcom_adc_tm5_temp_volt_scale(channel->prescale,
chip->data->full_scale_code_volt, low);
put_unaligned_le16(adc_code, &buf[3 ]);
buf[7 ] |= ADC_TM5_M_HIGH_THR_INT_EN;
} else {
buf[7 ] &= ~ADC_TM5_M_HIGH_THR_INT_EN;
}
buf[5 ] = ADC5_TIMER_SEL_2;
/* Set calibration select, hw_settle delay */
buf[6 ] &= ~ADC_TM5_M_CTL_HW_SETTLE_DELAY_MASK;
buf[6 ] |= FIELD_PREP(ADC_TM5_M_CTL_HW_SETTLE_DELAY_MASK, channel->hw_settle_time);
buf[6 ] &= ~ADC_TM5_M_CTL_CAL_SEL_MASK;
buf[6 ] |= FIELD_PREP(ADC_TM5_M_CTL_CAL_SEL_MASK, channel->cal_method);
buf[7 ] |= ADC_TM5_M_MEAS_EN;
ret = adc_tm5_write(chip, reg, buf, sizeof (buf));
if (ret) {
dev_err(chip->dev, "channel %d params write failed: %d\n" , channel->channel, ret);
return ret;
}
return adc_tm5_enable(chip);
}
static int adc_tm5_gen2_configure(struct adc_tm5_channel *channel, int low, int high)
{
struct adc_tm5_chip *chip = channel->chip;
int ret;
u8 buf[14 ];
u16 adc_code;
mutex_lock(&chip->adc_mutex_lock);
channel->meas_en = true ;
ret = adc_tm5_read(chip, ADC_TM_GEN2_SID, buf, sizeof (buf));
if (ret < 0 ) {
dev_err(chip->dev, "adc-tm block read failed with %d\n" , ret);
goto config_fail;
}
/* Set SID from virtual channel number */
buf[0 ] = channel->adc_channel >> 8 ;
/* Set TM channel number used and measurement interval */
buf[1 ] &= ~ADC_TM_GEN2_TM_CH_SEL;
buf[1 ] |= FIELD_PREP(ADC_TM_GEN2_TM_CH_SEL, channel->channel);
buf[1 ] &= ~ADC_TM_GEN2_MEAS_INT_SEL;
buf[1 ] |= FIELD_PREP(ADC_TM_GEN2_MEAS_INT_SEL, MEAS_INT_1S);
buf[2 ] &= ~ADC_TM_GEN2_CTL_DEC_RATIO_MASK;
buf[2 ] |= FIELD_PREP(ADC_TM_GEN2_CTL_DEC_RATIO_MASK, channel->decimation);
buf[2 ] &= ~ADC_TM_GEN2_CTL_CAL_SEL;
buf[2 ] |= FIELD_PREP(ADC_TM_GEN2_CTL_CAL_SEL, channel->cal_method);
buf[3 ] = channel->avg_samples | ADC_TM_GEN2_FAST_AVG_EN;
buf[4 ] = channel->adc_channel & 0 xff;
buf[5 ] = channel->hw_settle_time & ADC_TM_GEN2_HW_SETTLE_DELAY;
/* High temperature corresponds to low voltage threshold */
if (high != INT_MAX) {
channel->low_thr_en = true ;
adc_code = qcom_adc_tm5_gen2_temp_res_scale(high);
put_unaligned_le16(adc_code, &buf[9 ]);
} else {
channel->low_thr_en = false ;
}
/* Low temperature corresponds to high voltage threshold */
if (low != -INT_MAX) {
channel->high_thr_en = true ;
adc_code = qcom_adc_tm5_gen2_temp_res_scale(low);
put_unaligned_le16(adc_code, &buf[11 ]);
} else {
channel->high_thr_en = false ;
}
buf[13 ] = ADC_TM_GEN2_MEAS_EN;
if (channel->high_thr_en)
buf[13 ] |= ADC_TM5_GEN2_HIGH_THR_INT_EN;
if (channel->low_thr_en)
buf[13 ] |= ADC_TM5_GEN2_LOW_THR_INT_EN;
ret = adc_tm5_write(chip, ADC_TM_GEN2_SID, buf, sizeof (buf));
if (ret) {
dev_err(chip->dev, "channel %d params write failed: %d\n" , channel->channel, ret);
goto config_fail;
}
ret = adc_tm5_gen2_conv_req(channel->chip);
if (ret < 0 )
dev_err(chip->dev, "adc-tm channel configure failed with %d\n" , ret);
config_fail:
mutex_unlock(&chip->adc_mutex_lock);
return ret;
}
static int adc_tm5_set_trips(struct thermal_zone_device *tz, int low, int high)
{
struct adc_tm5_channel *channel = thermal_zone_device_priv(tz);
struct adc_tm5_chip *chip;
int ret;
if (!channel)
return -EINVAL;
chip = channel->chip;
dev_dbg(chip->dev, "%d:low(mdegC):%d, high(mdegC):%d\n" ,
channel->channel, low, high);
if (high == INT_MAX && low <= -INT_MAX)
ret = chip->data->disable_channel(channel);
else
ret = chip->data->configure(channel, low, high);
return ret;
}
static const struct thermal_zone_device_ops adc_tm5_thermal_ops = {
.get_temp = adc_tm5_get_temp,
.set_trips = adc_tm5_set_trips,
};
static int adc_tm5_register_tzd(struct adc_tm5_chip *adc_tm)
{
unsigned int i;
struct thermal_zone_device *tzd;
for (i = 0 ; i < adc_tm->nchannels; i++) {
adc_tm->channels[i].chip = adc_tm;
tzd = devm_thermal_of_zone_register(adc_tm->dev,
adc_tm->channels[i].channel,
&adc_tm->channels[i],
&adc_tm5_thermal_ops);
if (IS_ERR(tzd)) {
if (PTR_ERR(tzd) == -ENODEV) {
dev_dbg(adc_tm->dev, "thermal sensor on channel %d is not used\n" ,
adc_tm->channels[i].channel);
continue ;
}
dev_err(adc_tm->dev, "Error registering TZ zone for channel %d: %ld\n" ,
adc_tm->channels[i].channel, PTR_ERR(tzd));
return PTR_ERR(tzd);
}
adc_tm->channels[i].tzd = tzd;
devm_thermal_add_hwmon_sysfs(adc_tm->dev, tzd);
}
return 0 ;
}
static int adc_tm_hc_init(struct adc_tm5_chip *chip)
{
unsigned int i;
u8 buf[2 ];
int ret;
for (i = 0 ; i < chip->nchannels; i++) {
if (chip->channels[i].channel >= ADC_TM5_NUM_CHANNELS) {
dev_err(chip->dev, "Invalid channel %d\n" , chip->channels[i].channel);
return -EINVAL;
}
}
buf[0 ] = chip->decimation;
buf[1 ] = chip->avg_samples | ADC_TM5_FAST_AVG_EN;
ret = adc_tm5_write(chip, ADC_TM5_ADC_DIG_PARAM, buf, sizeof (buf));
if (ret)
dev_err(chip->dev, "block write failed: %d\n" , ret);
return ret;
}
static int adc_tm5_init(struct adc_tm5_chip *chip)
{
u8 buf[4 ], channels_available;
int ret;
unsigned int i;
ret = adc_tm5_read(chip, ADC_TM5_NUM_BTM,
&channels_available, sizeof (channels_available));
if (ret) {
dev_err(chip->dev, "read failed for BTM channels\n" );
return ret;
}
for (i = 0 ; i < chip->nchannels; i++) {
if (chip->channels[i].channel >= channels_available) {
dev_err(chip->dev, "Invalid channel %d\n" , chip->channels[i].channel);
return -EINVAL;
}
}
buf[0 ] = chip->decimation;
buf[1 ] = chip->avg_samples | ADC_TM5_FAST_AVG_EN;
buf[2 ] = ADC_TM5_TIMER1;
buf[3 ] = FIELD_PREP(ADC_TM5_MEAS_INTERVAL_CTL2_MASK, ADC_TM5_TIMER2) |
FIELD_PREP(ADC_TM5_MEAS_INTERVAL_CTL3_MASK, ADC_TM5_TIMER3);
ret = adc_tm5_write(chip, ADC_TM5_ADC_DIG_PARAM, buf, sizeof (buf));
if (ret) {
dev_err(chip->dev, "block write failed: %d\n" , ret);
return ret;
}
return ret;
}
static int adc_tm5_gen2_init(struct adc_tm5_chip *chip)
{
u8 channels_available;
int ret;
unsigned int i;
ret = adc_tm5_read(chip, ADC_TM5_NUM_BTM,
&channels_available, sizeof (channels_available));
if (ret) {
dev_err(chip->dev, "read failed for BTM channels\n" );
return ret;
}
for (i = 0 ; i < chip->nchannels; i++) {
if (chip->channels[i].channel >= channels_available) {
dev_err(chip->dev, "Invalid channel %d\n" , chip->channels[i].channel);
return -EINVAL;
}
}
mutex_init(&chip->adc_mutex_lock);
return ret;
}
static int adc_tm5_get_dt_channel_data(struct adc_tm5_chip *adc_tm,
struct adc_tm5_channel *channel,
struct device_node *node)
{
const char *name = node->name;
u32 chan, value, adc_channel, varr[2 ];
int ret;
struct device *dev = adc_tm->dev;
struct of_phandle_args args;
ret = of_property_read_u32(node, "reg" , &chan);
if (ret) {
dev_err(dev, "%s: invalid channel number %d\n" , name, ret);
return ret;
}
if (chan >= ADC_TM5_NUM_CHANNELS) {
dev_err(dev, "%s: channel number too big: %d\n" , name, chan);
return -EINVAL;
}
channel->channel = chan;
/*
* We are tied to PMIC ' s ADC controller , which always use single
* argument for channel number . So don ' t bother parsing
* # io - channel - cells , just enforce cell_count = 1 .
*/
ret = of_parse_phandle_with_fixed_args(node, "io-channels" , 1 , 0 , &args);
if (ret < 0 ) {
dev_err(dev, "%s: error parsing ADC channel number %d: %d\n" , name, chan, ret);
return ret;
}
of_node_put(args.np);
if (args.args_count != 1 ) {
dev_err(dev, "%s: invalid args count for ADC channel %d\n" , name, chan);
return -EINVAL;
}
adc_channel = args.args[0 ];
if (adc_tm->data->gen == ADC_TM5_GEN2)
adc_channel &= 0 xff;
if (adc_channel >= ADC5_MAX_CHANNEL) {
dev_err(dev, "%s: invalid ADC channel number %d\n" , name, chan);
return -EINVAL;
}
channel->adc_channel = args.args[0 ];
channel->iio = devm_fwnode_iio_channel_get_by_name(adc_tm->dev,
of_fwnode_handle(node), NULL);
if (IS_ERR(channel->iio))
return dev_err_probe(dev, PTR_ERR(channel->iio), "%s: error getting channel\n" ,
name);
ret = of_property_read_u32_array(node, "qcom,pre-scaling" , varr, 2 );
if (!ret) {
ret = qcom_adc5_prescaling_from_dt(varr[0 ], varr[1 ]);
if (ret < 0 ) {
dev_err(dev, "%s: invalid pre-scaling <%d %d>\n" ,
name, varr[0 ], varr[1 ]);
return ret;
}
channel->prescale = ret;
} else {
/* 1:1 prescale is index 0 */
channel->prescale = 0 ;
}
ret = of_property_read_u32(node, "qcom,hw-settle-time-us" , &value);
if (!ret) {
ret = qcom_adc5_hw_settle_time_from_dt(value, adc_tm->data->hw_settle);
if (ret < 0 ) {
dev_err(dev, "%s invalid hw-settle-time-us %d us\n" ,
name, value);
return ret;
}
channel->hw_settle_time = ret;
} else {
channel->hw_settle_time = VADC_DEF_HW_SETTLE_TIME;
}
if (of_property_read_bool(node, "qcom,ratiometric" ))
channel->cal_method = ADC_TM5_RATIOMETRIC_CAL;
else
channel->cal_method = ADC_TM5_ABSOLUTE_CAL;
if (adc_tm->data->gen == ADC_TM5_GEN2) {
ret = of_property_read_u32(node, "qcom,decimation" , &value);
if (!ret) {
ret = qcom_adc5_decimation_from_dt(value, adc_tm->data->decimation);
if (ret < 0 ) {
dev_err(dev, "invalid decimation %d\n" , value);
return ret;
}
channel->decimation = ret;
} else {
channel->decimation = ADC5_DECIMATION_DEFAULT;
}
ret = of_property_read_u32(node, "qcom,avg-samples" , &value);
if (!ret) {
ret = qcom_adc5_avg_samples_from_dt(value);
if (ret < 0 ) {
dev_err(dev, "invalid avg-samples %d\n" , value);
return ret;
}
channel->avg_samples = ret;
} else {
channel->avg_samples = VADC_DEF_AVG_SAMPLES;
}
}
return 0 ;
}
static const struct adc_tm5_data adc_tm5_data_pmic = {
.full_scale_code_volt = 0 x70e4,
.decimation = (unsigned int []) { 250 , 420 , 840 },
.hw_settle = (unsigned int []) { 15 , 100 , 200 , 300 , 400 , 500 , 600 , 700 ,
1000 , 2000 , 4000 , 8000 , 16000 , 32000 ,
64000 , 128000 },
.disable_channel = adc_tm5_disable_channel,
.configure = adc_tm5_configure,
.isr = adc_tm5_isr,
.init = adc_tm5_init,
.irq_name = "pm-adc-tm5" ,
.gen = ADC_TM5,
};
static const struct adc_tm5_data adc_tm_hc_data_pmic = {
.full_scale_code_volt = 0 x70e4,
.decimation = (unsigned int []) { 256 , 512 , 1024 },
.hw_settle = (unsigned int []) { 0 , 100 , 200 , 300 , 400 , 500 , 600 , 700 ,
1000 , 2000 , 4000 , 6000 , 8000 , 10000 },
.disable_channel = adc_tm5_disable_channel,
.configure = adc_tm5_configure,
.isr = adc_tm5_isr,
.init = adc_tm_hc_init,
.irq_name = "pm-adc-tm5" ,
.gen = ADC_TM_HC,
};
static const struct adc_tm5_data adc_tm5_gen2_data_pmic = {
.full_scale_code_volt = 0 x70e4,
.decimation = (unsigned int []) { 85 , 340 , 1360 },
.hw_settle = (unsigned int []) { 15 , 100 , 200 , 300 , 400 , 500 , 600 , 700 ,
1000 , 2000 , 4000 , 8000 , 16000 , 32000 ,
64000 , 128000 },
.disable_channel = adc_tm5_gen2_disable_channel,
.configure = adc_tm5_gen2_configure,
.isr = adc_tm5_gen2_isr,
.init = adc_tm5_gen2_init,
.irq_name = "pm-adc-tm5-gen2" ,
.gen = ADC_TM5_GEN2,
};
static int adc_tm5_get_dt_data(struct adc_tm5_chip *adc_tm, struct device_node *node)
{
struct adc_tm5_channel *channels;
u32 value;
int ret;
struct device *dev = adc_tm->dev;
adc_tm->nchannels = of_get_available_child_count(node);
if (!adc_tm->nchannels)
return -EINVAL;
adc_tm->channels = devm_kcalloc(dev, adc_tm->nchannels,
sizeof (*adc_tm->channels), GFP_KERNEL);
if (!adc_tm->channels)
return -ENOMEM;
channels = adc_tm->channels;
adc_tm->data = of_device_get_match_data(dev);
if (!adc_tm->data)
adc_tm->data = &adc_tm5_data_pmic;
ret = of_property_read_u32(node, "qcom,decimation" , &value);
if (!ret) {
ret = qcom_adc5_decimation_from_dt(value, adc_tm->data->decimation);
if (ret < 0 ) {
dev_err(dev, "invalid decimation %d\n" , value);
return ret;
}
adc_tm->decimation = ret;
} else {
adc_tm->decimation = ADC5_DECIMATION_DEFAULT;
}
ret = of_property_read_u32(node, "qcom,avg-samples" , &value);
if (!ret) {
ret = qcom_adc5_avg_samples_from_dt(value);
if (ret < 0 ) {
dev_err(dev, "invalid avg-samples %d\n" , value);
return ret;
}
adc_tm->avg_samples = ret;
} else {
adc_tm->avg_samples = VADC_DEF_AVG_SAMPLES;
}
for_each_available_child_of_node_scoped(node, child) {
ret = adc_tm5_get_dt_channel_data(adc_tm, channels, child);
if (ret)
return ret;
channels++;
}
return 0 ;
}
static int adc_tm5_probe(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
struct device *dev = &pdev->dev;
struct adc_tm5_chip *adc_tm;
struct regmap *regmap;
int ret, irq;
u32 reg;
regmap = dev_get_regmap(dev->parent, NULL);
if (!regmap)
return -ENODEV;
ret = of_property_read_u32(node, "reg" , ®);
if (ret)
return ret;
adc_tm = devm_kzalloc(&pdev->dev, sizeof (*adc_tm), GFP_KERNEL);
if (!adc_tm)
return -ENOMEM;
adc_tm->regmap = regmap;
adc_tm->dev = dev;
adc_tm->base = reg;
irq = platform_get_irq(pdev, 0 );
if (irq < 0 )
return irq;
ret = adc_tm5_get_dt_data(adc_tm, node);
if (ret)
return dev_err_probe(dev, ret, "get dt data failed\n" );
ret = adc_tm->data->init(adc_tm);
if (ret) {
dev_err(dev, "adc-tm init failed\n" );
return ret;
}
ret = adc_tm5_register_tzd(adc_tm);
if (ret) {
dev_err(dev, "tzd register failed\n" );
return ret;
}
return devm_request_threaded_irq(dev, irq, NULL, adc_tm->data->isr,
IRQF_ONESHOT, adc_tm->data->irq_name, adc_tm);
}
static const struct of_device_id adc_tm5_match_table[] = {
{
.compatible = "qcom,spmi-adc-tm5" ,
.data = &adc_tm5_data_pmic,
},
{
.compatible = "qcom,spmi-adc-tm-hc" ,
.data = &adc_tm_hc_data_pmic,
},
{
.compatible = "qcom,spmi-adc-tm5-gen2" ,
.data = &adc_tm5_gen2_data_pmic,
},
{ }
};
MODULE_DEVICE_TABLE(of, adc_tm5_match_table);
static struct platform_driver adc_tm5_driver = {
.driver = {
.name = "qcom-spmi-adc-tm5" ,
.of_match_table = adc_tm5_match_table,
},
.probe = adc_tm5_probe,
};
module_platform_driver(adc_tm5_driver);
MODULE_DESCRIPTION("SPMI PMIC Thermal Monitor ADC driver" );
MODULE_LICENSE("GPL v2" );
Messung V0.5 in Prozent C=98 H=99 G=98
¤ Dauer der Verarbeitung: 0.22 Sekunden
(vorverarbeitet am 2026-09-28)
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