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Message-ID: <20241030185854.4015348-5-quic_jprakash@quicinc.com>
Date: Thu, 31 Oct 2024 00:28:54 +0530
From: Jishnu Prakash <quic_jprakash@...cinc.com>
To: <jic23@...nel.org>, <robh+dt@...nel.org>,
<krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
<agross@...nel.org>, <andersson@...nel.org>,
<dmitry.baryshkov@...aro.org>, <konrad.dybcio@...aro.org>,
<daniel.lezcano@...aro.org>, <sboyd@...nel.org>,
<quic_subbaram@...cinc.com>, <quic_collinsd@...cinc.com>,
<quic_amelende@...cinc.com>, <quic_kamalw@...cinc.com>,
<amitk@...nel.org>
CC: <lee@...nel.org>, <rafael@...nel.org>, <rui.zhang@...el.com>,
<lukasz.luba@....com>, <lars@...afoo.de>, <quic_skakitap@...cinc.com>,
<neil.armstrong@...aro.org>, <devicetree@...r.kernel.org>,
<linux-arm-msm@...r.kernel.org>, <linux-iio@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>,
<cros-qcom-dts-watchers@...omium.org>,
Jishnu Prakash
<quic_jprakash@...cinc.com>
Subject: [PATCH V4 4/4] thermal: qcom: add support for PMIC5 Gen3 ADC thermal monitoring
Add support for ADC_TM part of PMIC5 Gen3.
This is an auxiliary driver under the Gen3 ADC driver, which
implements the threshold setting and interrupt generating
functionalities of QCOM ADC_TM drivers, used to support thermal
trip points.
Signed-off-by: Jishnu Prakash <quic_jprakash@...cinc.com>
---
drivers/thermal/qcom/Kconfig | 11 +
drivers/thermal/qcom/Makefile | 1 +
drivers/thermal/qcom/qcom-spmi-adc-tm5-gen3.c | 489 ++++++++++++++++++
3 files changed, 501 insertions(+)
create mode 100644 drivers/thermal/qcom/qcom-spmi-adc-tm5-gen3.c
diff --git a/drivers/thermal/qcom/Kconfig b/drivers/thermal/qcom/Kconfig
index 2c7f3f9a26eb..f9876fb8606d 100644
--- a/drivers/thermal/qcom/Kconfig
+++ b/drivers/thermal/qcom/Kconfig
@@ -21,6 +21,17 @@ config QCOM_SPMI_ADC_TM5
Thermal client sets threshold temperature for both warm and cool and
gets updated when a threshold is reached.
+config QCOM_SPMI_ADC_TM5_GEN3
+ tristate "Qualcomm SPMI PMIC Thermal Monitor ADC5 Gen3"
+ depends on OF && SPMI && IIO && QCOM_SPMI_ADC5_GEN3
+ select REGMAP_SPMI
+ select QCOM_VADC_COMMON
+ help
+ This enables the auxiliary thermal driver for the ADC5 Gen3 thermal
+ monitoring device. It shows up as a thermal zone with multiple trip points.
+ Thermal client sets threshold temperature for both warm and cool and
+ gets updated when a threshold is reached.
+
config QCOM_SPMI_TEMP_ALARM
tristate "Qualcomm SPMI PMIC Temperature Alarm"
depends on OF && SPMI && IIO
diff --git a/drivers/thermal/qcom/Makefile b/drivers/thermal/qcom/Makefile
index 0fa2512042e7..828d9e7bc797 100644
--- a/drivers/thermal/qcom/Makefile
+++ b/drivers/thermal/qcom/Makefile
@@ -4,5 +4,6 @@ obj-$(CONFIG_QCOM_TSENS) += qcom_tsens.o
qcom_tsens-y += tsens.o tsens-v2.o tsens-v1.o tsens-v0_1.o \
tsens-8960.o
obj-$(CONFIG_QCOM_SPMI_ADC_TM5) += qcom-spmi-adc-tm5.o
+obj-$(CONFIG_QCOM_SPMI_ADC_TM5_GEN3) += qcom-spmi-adc-tm5-gen3.o
obj-$(CONFIG_QCOM_SPMI_TEMP_ALARM) += qcom-spmi-temp-alarm.o
obj-$(CONFIG_QCOM_LMH) += lmh.o
diff --git a/drivers/thermal/qcom/qcom-spmi-adc-tm5-gen3.c b/drivers/thermal/qcom/qcom-spmi-adc-tm5-gen3.c
new file mode 100644
index 000000000000..fa57f417d833
--- /dev/null
+++ b/drivers/thermal/qcom/qcom-spmi-adc-tm5-gen3.c
@@ -0,0 +1,489 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/iio/adc/qcom-adc5-gen3-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"
+
+struct adc_tm5_gen3_chip;
+
+/**
+ * @adc_tm: indicates if the channel is used for TM measurements.
+ * @tm_chan_index: TM channel number used (ranging from 1-7).
+ * @timer: time period of recurring TM measurement.
+ * @tzd: pointer to thermal device corresponding to TM channel.
+ * @high_thr_en: TM high threshold crossing detection enabled.
+ * @low_thr_en: TM low threshold crossing detection enabled.
+ * @last_temp: last temperature that caused threshold violation,
+ * or a thermal TM channel.
+ * @last_temp_set: indicates if last_temp is stored.
+ */
+
+struct adc_tm5_gen3_channel_props {
+ struct device *dev;
+ unsigned int timer;
+ unsigned int tm_chan_index;
+ unsigned int sdam_index;
+ struct adc5_channel_common_prop common_props;
+ bool high_thr_en;
+ bool low_thr_en;
+ bool meas_en;
+ struct adc_tm5_gen3_chip *chip;
+ struct thermal_zone_device *tzd;
+ int last_temp;
+ bool last_temp_set;
+};
+
+struct adc_tm5_gen3_chip {
+ struct adc5_device_data *dev_data;
+ struct adc_tm5_gen3_channel_props *chan_props;
+ unsigned int nchannels;
+ struct device *dev;
+ struct work_struct tm_handler_work;
+};
+
+static int get_sdam_from_irq(struct adc_tm5_gen3_chip *adc_tm5, int irq)
+{
+ int i;
+
+ for (i = 0; i < adc_tm5->dev_data->num_sdams; i++) {
+ if (adc_tm5->dev_data->base[i].irq == irq)
+ return i;
+ }
+ return -ENOENT;
+}
+
+static irqreturn_t adctm5_gen3_isr(int irq, void *dev_id)
+{
+ struct adc_tm5_gen3_chip *adc_tm5 = dev_id;
+ u8 status, tm_status[2], val;
+ int ret, sdam_num;
+
+ sdam_num = get_sdam_from_irq(adc_tm5, irq);
+ if (sdam_num < 0) {
+ dev_err(adc_tm5->dev, "adc irq %d not associated with an sdam\n", irq);
+ return IRQ_HANDLED;
+ }
+
+ ret = adc5_gen3_read(adc_tm5->dev_data, sdam_num, ADC5_GEN3_STATUS1, &status, 1);
+ if (ret) {
+ dev_err(adc_tm5->dev, "adc read status1 failed with %d\n", ret);
+ return IRQ_HANDLED;
+ }
+
+ if (status & ADC5_GEN3_STATUS1_CONV_FAULT) {
+ dev_err_ratelimited(adc_tm5->dev, "Unexpected conversion fault, status:%#x\n",
+ status);
+ val = ADC5_GEN3_CONV_ERR_CLR_REQ;
+ adc5_gen3_status_clear(adc_tm5->dev_data, sdam_num, ADC5_GEN3_CONV_ERR_CLR, &val,
+ 1);
+ return IRQ_HANDLED;
+ }
+
+ ret = adc5_gen3_read(adc_tm5->dev_data, sdam_num, ADC5_GEN3_TM_HIGH_STS, tm_status, 2);
+ if (ret) {
+ dev_err(adc_tm5->dev, "adc read TM status failed with %d\n", ret);
+ return IRQ_HANDLED;
+ }
+
+ if (tm_status[0] || tm_status[1])
+ schedule_work(&adc_tm5->tm_handler_work);
+
+ dev_dbg(adc_tm5->dev, "Interrupt status:%#x, TM status:%#x, high:%#x, low:%#x\n",
+ status, tm_status, tm_status[0], tm_status[1]);
+
+ return IRQ_HANDLED;
+}
+
+static int adc5_gen3_tm_status_check(struct adc_tm5_gen3_chip *adc_tm5,
+ int sdam_index, u8 *tm_status, u8 *buf)
+{
+ int ret;
+
+ ret = adc5_gen3_read(adc_tm5->dev_data, sdam_index, ADC5_GEN3_TM_HIGH_STS, tm_status, 2);
+ if (ret) {
+ dev_err(adc_tm5->dev, "adc read TM status failed with %d\n", ret);
+ return ret;
+ }
+
+ ret = adc5_gen3_status_clear(adc_tm5->dev_data, sdam_index, ADC5_GEN3_TM_HIGH_STS_CLR,
+ tm_status, 2);
+ if (ret) {
+ dev_err(adc_tm5->dev, "adc status clear conv_req failed with %d\n", ret);
+ return ret;
+ }
+
+ ret = adc5_gen3_read(adc_tm5->dev_data, sdam_index, ADC5_GEN3_CH_DATA0(0), buf, 16);
+ if (ret)
+ dev_err(adc_tm5->dev, "adc read data failed with %d\n", ret);
+
+ return ret;
+}
+
+static void tm_handler_work(struct work_struct *work)
+{
+ struct adc_tm5_gen3_chip *adc_tm5 = container_of(work, struct adc_tm5_gen3_chip,
+ tm_handler_work);
+ struct adc_tm5_gen3_channel_props *chan_prop;
+ u8 tm_status[2] = {0};
+ u8 buf[16] = {0};
+ int i, ret = 0, sdam_index = -1;
+
+ for (i = 0; i < adc_tm5->nchannels; i++) {
+ bool upper_set = false, lower_set = false;
+ int temp, offset;
+ u16 code = 0;
+
+ chan_prop = &adc_tm5->chan_props[i];
+ offset = chan_prop->tm_chan_index;
+
+ adc5_take_mutex_lock(adc_tm5->dev, true);
+ if (chan_prop->sdam_index != sdam_index) {
+ sdam_index = chan_prop->sdam_index;
+ ret = adc5_gen3_tm_status_check(adc_tm5, sdam_index, tm_status, buf);
+ if (ret) {
+ adc5_take_mutex_lock(adc_tm5->dev, false);
+ break;
+ }
+ }
+
+ if ((tm_status[0] & BIT(offset)) && chan_prop->high_thr_en)
+ upper_set = true;
+
+ if ((tm_status[1] & BIT(offset)) && chan_prop->low_thr_en)
+ lower_set = true;
+ adc5_take_mutex_lock(adc_tm5->dev, false);
+
+ if (!(upper_set || lower_set))
+ continue;
+
+ code = get_unaligned_le16(&buf[2 * offset]);
+ pr_debug("ADC_TM threshold code:%#x\n", code);
+
+ ret = adc5_gen3_therm_code_to_temp(adc_tm5->dev, &chan_prop->common_props, code,
+ &temp);
+ if (ret) {
+ dev_err(adc_tm5->dev, "Invalid temperature reading, ret = %d, code=%#x\n",
+ ret, code);
+ continue;
+ }
+
+ chan_prop->last_temp = temp;
+ chan_prop->last_temp_set = true;
+ thermal_zone_device_update(chan_prop->tzd, THERMAL_TRIP_VIOLATED);
+ }
+}
+
+static int adc_tm5_gen3_get_temp(struct thermal_zone_device *tz, int *temp)
+{
+ struct adc_tm5_gen3_channel_props *prop = thermal_zone_device_priv(tz);
+ struct adc_tm5_gen3_chip *adc_tm5;
+
+ if (!prop || !prop->chip)
+ return -EINVAL;
+
+ adc_tm5 = prop->chip;
+
+ if (prop->last_temp_set) {
+ pr_debug("last_temp: %d\n", prop->last_temp);
+ prop->last_temp_set = false;
+ *temp = prop->last_temp;
+ return 0;
+ }
+
+ return adc5_gen3_get_scaled_reading(adc_tm5->dev, &prop->common_props, temp);
+}
+
+static int _adc_tm5_gen3_disable_channel(struct adc_tm5_gen3_channel_props *prop)
+{
+ struct adc_tm5_gen3_chip *adc_tm5 = prop->chip;
+ int ret;
+ u8 val;
+
+ prop->high_thr_en = false;
+ prop->low_thr_en = false;
+
+ ret = adc5_gen3_poll_wait_hs(adc_tm5->dev_data, prop->sdam_index);
+ if (ret)
+ return ret;
+
+ val = BIT(prop->tm_chan_index);
+ ret = adc5_gen3_write(adc_tm5->dev_data, prop->sdam_index, ADC5_GEN3_TM_HIGH_STS_CLR,
+ &val, 1);
+ if (ret)
+ return ret;
+
+ val = MEAS_INT_DISABLE;
+ ret = adc5_gen3_write(adc_tm5->dev_data, prop->sdam_index, ADC5_GEN3_TIMER_SEL, &val, 1);
+ if (ret)
+ return ret;
+
+ /* To indicate there is an actual conversion request */
+ val = ADC5_GEN3_CHAN_CONV_REQ | prop->tm_chan_index;
+ ret = adc5_gen3_write(adc_tm5->dev_data, prop->sdam_index, ADC5_GEN3_PERPH_CH, &val, 1);
+ if (ret)
+ return ret;
+
+ val = ADC5_GEN3_CONV_REQ_REQ;
+ return adc5_gen3_write(adc_tm5->dev_data, prop->sdam_index, ADC5_GEN3_CONV_REQ, &val, 1);
+}
+
+static int adc_tm5_gen3_disable_channel(struct adc_tm5_gen3_channel_props *prop)
+{
+ return _adc_tm5_gen3_disable_channel(prop);
+}
+
+# define ADC_TM5_GEN3_CONFIG_REGS 12
+
+static int adc_tm5_gen3_configure(struct adc_tm5_gen3_channel_props *prop,
+ int low_temp, int high_temp)
+{
+ struct adc_tm5_gen3_chip *adc_tm5 = prop->chip;
+ u8 conv_req = 0, buf[ADC_TM5_GEN3_CONFIG_REGS];
+ u16 adc_code;
+ int ret;
+
+ ret = adc5_gen3_poll_wait_hs(adc_tm5->dev_data, prop->sdam_index);
+ if (ret < 0)
+ return ret;
+
+ ret = adc5_gen3_read(adc_tm5->dev_data, prop->sdam_index, ADC5_GEN3_SID, buf, sizeof(buf));
+ if (ret < 0)
+ return ret;
+
+ /* Write SID */
+ buf[0] = FIELD_PREP(ADC5_GEN3_SID_MASK, prop->common_props.sid);
+
+ /*
+ * Select TM channel and indicate there is an actual
+ * conversion request
+ */
+ buf[1] = ADC5_GEN3_CHAN_CONV_REQ | prop->tm_chan_index;
+
+ buf[2] = prop->timer;
+
+ /* Digital param selection */
+ adc5_gen3_update_dig_param(&prop->common_props, &buf[3]);
+
+ /* Update fast average sample value */
+ buf[4] &= ~ADC5_GEN3_FAST_AVG_CTL_SAMPLES_MASK;
+ buf[4] |= prop->common_props.avg_samples | ADC5_GEN3_FAST_AVG_CTL_EN;
+
+ /* Select ADC channel */
+ buf[5] = prop->common_props.channel;
+
+ /* Select HW settle delay for channel */
+ buf[6] = FIELD_PREP(ADC5_GEN3_HW_SETTLE_DELAY_MASK, prop->common_props.hw_settle_time);
+
+ /* High temperature corresponds to low voltage threshold */
+ if (high_temp != INT_MAX) {
+ prop->low_thr_en = true;
+ adc_code = qcom_adc_tm5_gen2_temp_res_scale(high_temp);
+ put_unaligned_le16(adc_code, &buf[8]);
+ } else {
+ prop->low_thr_en = false;
+ }
+
+ /* Low temperature corresponds to high voltage threshold */
+ if (low_temp != -INT_MAX) {
+ prop->high_thr_en = true;
+ adc_code = qcom_adc_tm5_gen2_temp_res_scale(low_temp);
+ put_unaligned_le16(adc_code, &buf[10]);
+ } else {
+ prop->high_thr_en = false;
+ }
+
+ buf[7] = 0;
+ if (prop->high_thr_en)
+ buf[7] |= ADC5_GEN3_HIGH_THR_INT_EN;
+ if (prop->low_thr_en)
+ buf[7] |= ADC5_GEN3_LOW_THR_INT_EN;
+
+ ret = adc5_gen3_write(adc_tm5->dev_data, prop->sdam_index, ADC5_GEN3_SID, buf, sizeof(buf));
+ if (ret < 0)
+ return ret;
+
+ conv_req = ADC5_GEN3_CONV_REQ_REQ;
+ return adc5_gen3_write(adc_tm5->dev_data, prop->sdam_index, ADC5_GEN3_CONV_REQ, &conv_req,
+ 1);
+}
+
+static int adc_tm5_gen3_set_trip_temp(struct thermal_zone_device *tz,
+ int low_temp, int high_temp)
+{
+ struct adc_tm5_gen3_channel_props *prop = thermal_zone_device_priv(tz);
+ struct adc_tm5_gen3_chip *adc_tm5;
+ int ret;
+
+ if (!prop || !prop->chip)
+ return -EINVAL;
+
+ adc_tm5 = prop->chip;
+
+ dev_dbg(adc_tm5->dev, "channel:%s, low_temp(mdegC):%d, high_temp(mdegC):%d\n",
+ prop->common_props.label, low_temp, high_temp);
+
+ adc5_take_mutex_lock(adc_tm5->dev, true);
+ if (high_temp == INT_MAX && low_temp <= -INT_MAX)
+ ret = adc_tm5_gen3_disable_channel(prop);
+ else
+ ret = adc_tm5_gen3_configure(prop, low_temp, high_temp);
+ adc5_take_mutex_lock(adc_tm5->dev, false);
+
+ return ret;
+}
+
+static const struct thermal_zone_device_ops adc_tm_ops = {
+ .get_temp = adc_tm5_gen3_get_temp,
+ .set_trips = adc_tm5_gen3_set_trip_temp,
+};
+
+static int adc_tm5_register_tzd(struct adc_tm5_gen3_chip *adc_tm5)
+{
+ unsigned int i, channel;
+ struct thermal_zone_device *tzd;
+
+ for (i = 0; i < adc_tm5->nchannels; i++) {
+ channel = V_CHAN(adc_tm5->chan_props[i].common_props);
+ tzd = devm_thermal_of_zone_register(adc_tm5->dev, channel,
+ &adc_tm5->chan_props[i], &adc_tm_ops);
+
+ if (IS_ERR(tzd)) {
+ if (PTR_ERR(tzd) == -ENODEV) {
+ dev_warn(adc_tm5->dev, "thermal sensor on channel %d is not used\n",
+ channel);
+ continue;
+ }
+ return dev_err_probe(adc_tm5->dev, PTR_ERR(tzd),
+ "Error registering TZ zone:%ld for channel:%d\n",
+ PTR_ERR(tzd), channel);
+ }
+ adc_tm5->chan_props[i].tzd = tzd;
+ devm_thermal_add_hwmon_sysfs(adc_tm5->dev, tzd);
+ }
+ return 0;
+}
+
+static void adc5_gen3_clear_work(void *data)
+{
+ struct adc_tm5_gen3_chip *adc_tm5 = data;
+
+ cancel_work_sync(&adc_tm5->tm_handler_work);
+}
+
+static void adc5_gen3_disable(void *data)
+{
+ struct adc_tm5_gen3_chip *adc_tm5 = data;
+ int i;
+
+ adc5_take_mutex_lock(adc_tm5->dev, true);
+ /* Disable all available TM channels */
+ for (i = 0; i < adc_tm5->nchannels; i++)
+ _adc_tm5_gen3_disable_channel(&adc_tm5->chan_props[i]);
+
+ adc5_take_mutex_lock(adc_tm5->dev, false);
+}
+
+static void adctm_event_handler(struct auxiliary_device *adev)
+{
+ struct adc_tm5_gen3_chip *adc_tm5 = auxiliary_get_drvdata(adev);
+
+ schedule_work(&adc_tm5->tm_handler_work);
+}
+
+static int adc_tm5_probe(struct auxiliary_device *aux_dev, const struct auxiliary_device_id *id)
+{
+ struct adc_tm5_gen3_chip *adc_tm5;
+ struct tm5_aux_dev_wrapper *aux_dev_wrapper;
+ struct device *dev = &aux_dev->dev;
+ int i, ret;
+
+ adc_tm5 = devm_kzalloc(&aux_dev->dev, sizeof(*adc_tm5), GFP_KERNEL);
+ if (!adc_tm5)
+ return -ENOMEM;
+
+ aux_dev_wrapper = container_of(aux_dev, struct tm5_aux_dev_wrapper, aux_dev);
+
+ adc_tm5->dev = dev;
+ adc_tm5->dev_data = aux_dev_wrapper->dev_data;
+ adc_tm5->nchannels = aux_dev_wrapper->n_tm_channels;
+ adc_tm5->chan_props = devm_kcalloc(adc_tm5->dev, aux_dev_wrapper->n_tm_channels,
+ sizeof(*adc_tm5->chan_props), GFP_KERNEL);
+ if (!adc_tm5->chan_props)
+ return -ENOMEM;
+
+ for (i = 0; i < adc_tm5->nchannels; i++) {
+ adc_tm5->chan_props[i].common_props = aux_dev_wrapper->tm_props[i];
+ adc_tm5->chan_props[i].timer = MEAS_INT_1S;
+ adc_tm5->chan_props[i].sdam_index = (i + 1) / 8;
+ adc_tm5->chan_props[i].tm_chan_index = (i + 1) % 8;
+ adc_tm5->chan_props[i].chip = adc_tm5;
+ }
+
+ ret = devm_add_action_or_reset(adc_tm5->dev, adc5_gen3_disable, adc_tm5);
+ if (ret)
+ return ret;
+
+ for (i = 1; i < adc_tm5->dev_data->num_sdams; i++) {
+ ret = devm_request_threaded_irq(adc_tm5->dev, adc_tm5->dev_data->base[i].irq, NULL,
+ adctm5_gen3_isr, IRQF_ONESHOT,
+ adc_tm5->dev_data->base[i].irq_name, adc_tm5);
+ if (ret < 0)
+ return ret;
+ }
+
+ INIT_WORK(&adc_tm5->tm_handler_work, tm_handler_work);
+ ret = devm_add_action(adc_tm5->dev, adc5_gen3_clear_work, adc_tm5);
+ if (ret)
+ return ret;
+
+ ret = adc_tm5_register_tzd(adc_tm5);
+ if (ret)
+ return ret;
+
+ auxiliary_set_drvdata(aux_dev, adc_tm5);
+ return 0;
+}
+
+static const struct auxiliary_device_id adctm5_auxiliary_id_table[] = {
+ { .name = "qcom_spmi_adc5_gen3.adc5_tm_gen3", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(auxiliary, adctm5_auxiliary_id_table);
+
+static struct adc_tm5_auxiliary_drv adctm5gen3_auxiliary_drv = {
+ .adrv = {
+ .id_table = adctm5_auxiliary_id_table,
+ .probe = adc_tm5_probe,
+ },
+ .tm_event_notify = adctm_event_handler,
+};
+
+static int __init adctm5_init_module(void)
+{
+ return auxiliary_driver_register(&adctm5gen3_auxiliary_drv.adrv);
+}
+
+static void __exit adctm5_exit_module(void)
+{
+ auxiliary_driver_unregister(&adctm5gen3_auxiliary_drv.adrv);
+}
+
+module_init(adctm5_init_module);
+module_exit(adctm5_exit_module);
+
+MODULE_DESCRIPTION("SPMI PMIC Thermal Monitor ADC driver");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(IIO_ADC5_GEN3);
--
2.25.1
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