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thermal/drivers/qcom: Add support for PMIC5 Gen2 ADCTM

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Add support for PMIC5 Gen2 ADC_TM, used on PMIC7 chips. It is a
close counterpart of PMIC7 ADC and has the same functionality as
PMIC5 ADC_TM, for threshold monitoring and interrupt generation.
It is present on PMK8350 alone, like PMIC7 ADC and can be used
to monitor up to 8 ADC channels, from any of the PMIC7 PMICs
having ADC on a target, through PBS(Programmable Boot Sequence).

Signed-off-by: Jishnu Prakash <quic_jprakash@quicinc.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/1648991869-20899-5-git-send-email-quic_jprakash@quicinc.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
This commit is contained in:
Jishnu Prakash 2022-04-03 18:47:49 +05:30 committed by Daniel Lezcano
parent 7e70a89a3a
commit 96f6f333bc
1 changed files with 397 additions and 7 deletions
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404
drivers/thermal/qcom/qcom-spmi-adc-tm5.c
View file

@ -4,7 +4,10 @@
*
* 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>
@ -15,6 +18,7 @@
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/thermal.h>
#include <asm-generic/unaligned.h>
/*
* Thermal monitoring block consists of 8 (ADC_TM5_NUM_CHANNELS) channels. Each
@ -71,6 +75,60 @@
#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 0x08
#define ADC_TM_GEN2_STATUS_LOW_SET 0x09
#define ADC_TM_GEN2_STATUS_LOW_CLR 0x0a
#define ADC_TM_GEN2_STATUS_HIGH_SET 0x0b
#define ADC_TM_GEN2_STATUS_HIGH_CLR 0x0c
#define ADC_TM_GEN2_CFG_HS_SET 0x0d
#define ADC_TM_GEN2_CFG_HS_FLAG BIT(0)
#define ADC_TM_GEN2_CFG_HS_CLR 0x0e
#define ADC_TM_GEN2_SID 0x40
#define ADC_TM_GEN2_CH_CTL 0x41
#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 0x42
#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 0x43
#define ADC_TM_GEN2_FAST_AVG_EN BIT(7)
#define ADC_TM_GEN2_ADC_CH_SEL_CTL 0x44
#define ADC_TM_GEN2_DELAY_CTL 0x45
#define ADC_TM_GEN2_HW_SETTLE_DELAY GENMASK(3, 0)
#define ADC_TM_GEN2_EN_CTL1 0x46
#define ADC_TM_GEN2_EN BIT(7)
#define ADC_TM_GEN2_CONV_REQ 0x47
#define ADC_TM_GEN2_CONV_REQ_EN BIT(7)
#define ADC_TM_GEN2_LOW_THR0 0x49
#define ADC_TM_GEN2_LOW_THR1 0x4a
#define ADC_TM_GEN2_HIGH_THR0 0x4b
#define ADC_TM_GEN2_HIGH_THR1 0x4c
#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 0x4d
#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 0x50
#define ADC_TM_GEN2_MEAS_INT_MSB 0x51
#define ADC_TM_GEN2_MEAS_INT_MODE 0x52
#define ADC_TM_GEN2_Mn_DATA0(n) ((n * 2) + 0xa0)
#define ADC_TM_GEN2_Mn_DATA1(n) ((n * 2) + 0xa1)
#define ADC_TM_GEN2_DATA_SHIFT 8
enum adc5_timer_select {
ADC5_TIMER_SEL_1 = 0,
ADC5_TIMER_SEL_2,
@ -81,6 +139,7 @@ enum adc5_timer_select {
enum adc5_gen {
ADC_TM5,
ADC_TM_HC,
ADC_TM5_GEN2,
ADC_TM5_MAX
};
@ -90,6 +149,14 @@ enum adc_tm5_cal_method {
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;
@ -113,6 +180,12 @@ struct adc_tm5_data {
* @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.
@ -123,6 +196,11 @@ struct adc_tm5_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;
@ -136,9 +214,15 @@ struct adc_tm5_channel {
* @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.
* 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;
@ -149,6 +233,7 @@ struct adc_tm5_chip {
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)
@ -215,6 +300,61 @@ static irqreturn_t adc_tm5_isr(int irq, void *data)
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(void *data, int *temp)
{
struct adc_tm5_channel *channel = data;
@ -245,6 +385,104 @@ static int adc_tm5_disable_channel(struct adc_tm5_channel *channel)
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;
@ -287,8 +525,7 @@ static int adc_tm5_configure(struct adc_tm5_channel *channel, int low, int high)
u16 adc_code = qcom_adc_tm5_temp_volt_scale(channel->prescale,
chip->data->full_scale_code_volt, high);
buf[1] = adc_code & 0xff;
buf[2] = adc_code >> 8;
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;
@ -299,8 +536,7 @@ static int adc_tm5_configure(struct adc_tm5_channel *channel, int low, int high)
u16 adc_code = qcom_adc_tm5_temp_volt_scale(channel->prescale,
chip->data->full_scale_code_volt, low);
buf[3] = adc_code & 0xff;
buf[4] = adc_code >> 8;
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;
@ -325,6 +561,82 @@ static int adc_tm5_configure(struct adc_tm5_channel *channel, int low, int high)
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 & 0xff;
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(void *data, int low, int high)
{
struct adc_tm5_channel *channel = data;
@ -438,12 +750,37 @@ static int adc_tm5_init(struct adc_tm5_chip *chip)
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, varr[2];
u32 chan, value, adc_channel, varr[2];
int ret;
struct device *dev = adc_tm->dev;
struct of_phandle_args args;
@ -473,7 +810,16 @@ static int adc_tm5_get_dt_channel_data(struct adc_tm5_chip *adc_tm,
}
of_node_put(args.np);
if (args.args_count != 1 || args.args[0] >= ADC5_MAX_CHANNEL) {
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 &= 0xff;
if (adc_channel >= ADC5_MAX_CHANNEL) {
dev_err(dev, "%s: invalid ADC channel number %d\n", name, chan);
return -EINVAL;
}
@ -519,6 +865,32 @@ static int adc_tm5_get_dt_channel_data(struct adc_tm5_chip *adc_tm,
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;
}
@ -549,6 +921,20 @@ static const struct adc_tm5_data adc_tm_hc_data_pmic = {
.gen = ADC_TM_HC,
};
static const struct adc_tm5_data adc_tm5_gen2_data_pmic = {
.full_scale_code_volt = 0x70e4,
.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;
@ -671,6 +1057,10 @@ static const struct of_device_id adc_tm5_match_table[] = {
.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);