[PATCH v3 08/10] thermal: qcom: add support for adc-tm5 PMIC thermal monitor

Dmitry Baryshkov
2020-09-09T16:44:24Z

Add support for Thermal Monitoring part of PMIC5. This part is closely
coupled with ADC, using it's channels directly. ADC-TM support
generating interrupts on ADC value crossing low or high voltage bounds,
which is used to support thermal trip points.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
drivers/iio/adc/qcom-vadc-common.c | 74 ++-
drivers/iio/adc/qcom-vadc-common.h | 3 +
drivers/thermal/qcom/Kconfig | 11 +
drivers/thermal/qcom/Makefile | 1 +
drivers/thermal/qcom/qcom-spmi-adc-tm5.c | 567 +++++++++++++++++++++++
5 files changed, 650 insertions(+), 6 deletions(-)
create mode 100644 drivers/thermal/qcom/qcom-spmi-adc-tm5.c

diff --git a/drivers/iio/adc/qcom-vadc-common.c b/drivers/iio/adc/qcom-vadc-common.c
index 40d77b3af1bb..fbdf501954ed 100644
--- a/drivers/iio/adc/qcom-vadc-common.c
+++ b/drivers/iio/adc/qcom-vadc-common.c
@@ -377,6 +377,42 @@ static int qcom_vadc_map_voltage_temp(const struct vadc_map_pt *pts,
return 0;
}

+static s32 qcom_vadc_map_temp_voltage(const struct vadc_map_pt *pts,
+ u32 tablesize, int input)
+{
+ bool descending = 1;
+ u32 i = 0;
+
+ /* Check if table is descending or ascending */
+ if (tablesize > 1) {
+ if (pts[0].y < pts[1].y)
+ descending = 0;
+ }
+
+ while (i < tablesize) {
+ if (descending && pts[i].y < input) {
+ /* table entry is less than measured*/
+ /* value and table is descending, stop */
+ break;
+ } else if ((!descending) && pts[i].y > input) {
+ /* table entry is greater than measured*/
+ /*value and table is ascending, stop */
+ break;
+ }
+ i++;
+ }
+
+ if (i == 0)
+ return pts[0].x;
+ if (i == tablesize)
+ return pts[tablesize - 1].x;
+
+ /* result is between search_index and search_index-1 */
+ /* interpolate linearly */
+ return fixp_linear_interpolate(pts[i - 1].y, pts[i - 1].x,
+ pts[i].y, pts[i].x, input);
+}
+
static void qcom_vadc_scale_calib(const struct vadc_linear_graph *calib_graph,
u16 adc_code,
bool absolute,
@@ -474,10 +510,23 @@ static int qcom_vadc_scale_chg_temp(const struct vadc_linear_graph *calib_graph,
return 0;
}

+static u16 qcom_vadc_scale_voltage_code(int voltage,
+ const struct vadc_prescale_ratio *prescale,
+ const u32 full_scale_code_volt,
+ unsigned int factor)
+{
+ s64 volt = voltage, adc_vdd_ref_mv = 1875;
+
+ volt *= prescale->num * factor * full_scale_code_volt;
+ volt = div64_s64(volt, (s64)prescale->den * adc_vdd_ref_mv * 1000);
+
+ return volt;
+}
+
static int qcom_vadc_scale_code_voltage_factor(u16 adc_code,
- const struct vadc_prescale_ratio *prescale,
- const struct adc5_data *data,
- unsigned int factor)
+ const struct vadc_prescale_ratio *prescale,
+ const struct adc5_data *data,
+ unsigned int factor)
{
s64 voltage, temp, adc_vdd_ref_mv = 1875;

@@ -658,10 +707,23 @@ int qcom_vadc_scale(enum vadc_scale_fn_type scaletype,
}
EXPORT_SYMBOL(qcom_vadc_scale);

+u16 qcom_adc_tm5_temp_volt_scale(unsigned int prescale_ratio,
+ u32 full_scale_code_volt, int temp)
+{
+ const struct vadc_prescale_ratio *prescale = &adc5_prescale_ratios[prescale_ratio];
+ s32 voltage;
+
+ voltage = qcom_vadc_map_temp_voltage(adcmap_100k_104ef_104fb_1875_vref,
+ ARRAY_SIZE(adcmap_100k_104ef_104fb_1875_vref),
+ temp);
+ return qcom_vadc_scale_voltage_code(voltage, prescale, full_scale_code_volt, 1000);
+}
+EXPORT_SYMBOL(qcom_adc_tm5_temp_volt_scale);
+
int qcom_adc5_hw_scale(enum vadc_scale_fn_type scaletype,
- unsigned int prescale_ratio,
- const struct adc5_data *data,
- u16 adc_code, int *result)
+ unsigned int prescale_ratio,
+ const struct adc5_data *data,
+ u16 adc_code, int *result)
{
const struct vadc_prescale_ratio *prescale = &adc5_prescale_ratios[prescale_ratio];

diff --git a/drivers/iio/adc/qcom-vadc-common.h b/drivers/iio/adc/qcom-vadc-common.h
index 7e5f6428e311..9af41201ad77 100644
--- a/drivers/iio/adc/qcom-vadc-common.h
+++ b/drivers/iio/adc/qcom-vadc-common.h
@@ -172,6 +172,9 @@ int qcom_adc5_hw_scale(enum vadc_scale_fn_type scaletype,
const struct adc5_data *data,
u16 adc_code, int *result_mdec);

+u16 qcom_adc_tm5_temp_volt_scale(unsigned int prescale_ratio,
+ u32 full_scale_code_volt, int temp);
+
int qcom_adc5_prescaling_from_dt(u32 num, u32 den);

int qcom_adc5_hw_settle_time_from_dt(u32 value, const unsigned int *hw_settle);
diff --git a/drivers/thermal/qcom/Kconfig b/drivers/thermal/qcom/Kconfig
index aa9c1d80fae4..8d5ac2df26dc 100644
--- a/drivers/thermal/qcom/Kconfig
+++ b/drivers/thermal/qcom/Kconfig
@@ -10,6 +10,17 @@ config QCOM_TSENS
Also able to set threshold temperature for both hot and cold and update
when a threshold is reached.

+config QCOM_SPMI_ADC_TM5
+ tristate "Qualcomm SPMI PMIC Thermal Monitor ADC5"
+ depends on OF && SPMI && IIO
+ select REGMAP_SPMI
+ select QCOM_VADC_COMMON
+ help
+ This enables the thermal driver for the ADC 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 ec86eef7f6a6..252ea7d9da0b 100644
--- a/drivers/thermal/qcom/Makefile
+++ b/drivers/thermal/qcom/Makefile
@@ -3,4 +3,5 @@ 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_TEMP_ALARM) += qcom-spmi-temp-alarm.o
diff --git a/drivers/thermal/qcom/qcom-spmi-adc-tm5.c b/drivers/thermal/qcom/qcom-spmi-adc-tm5.c
new file mode 100644
index 000000000000..82eda6e011ab
--- /dev/null
+++ b/drivers/thermal/qcom/qcom-spmi-adc-tm5.c
@@ -0,0 +1,567 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2020 Linaro Limited
+ */
+
+#include <linux/iio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/thermal.h>
+
+#include "../../iio/adc/qcom-vadc-common.h"
+
+#define ADC5_MAX_CHANNEL 0xc0
+#define ADC_TM5_NUM_CHANNELS 8
+
+#define ADC_TM5_STATUS_LOW 0x0a
+
+#define ADC_TM5_STATUS_HIGH 0x0b
+
+#define ADC_TM5_NUM_BTM 0x0f
+
+#define ADC_TM5_ADC_DIG_PARAM 0x42
+
+#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 0xf0
+#define ADC_TM5_TIMER2 10 /* 1 second */
+#define ADC_TM5_MEAS_INTERVAL_CTL3_MASK 0xf
+#define ADC_TM5_TIMER3 4 /* 4 second */
+
+#define ADC_TM5_M_CHAN_BASE 0x60
+
+#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 0xf
+#define ADC_TM5_M_CTL_CAL_SEL_MASK 0x30
+#define ADC_TM5_M_CTL_CAL_VAL 0x40
+#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)
+
+enum adc5_timer_select {
+ ADC5_TIMER_SEL_1 = 0,
+ ADC5_TIMER_SEL_2,
+ ADC5_TIMER_SEL_3,
+ ADC5_TIMER_SEL_NONE,
+};
+
+struct adc_tm5_data {
+ const u32 full_scale_code_volt;
+ unsigned int *decimation;
+ unsigned int *hw_settle;
+};
+
+enum adc_tm5_cal_method {
+ ADC_TM5_NO_CAL = 0,
+ ADC_TM5_RATIOMETRIC_CAL,
+ ADC_TM5_ABSOLUTE_CAL
+};
+
+struct adc_tm5_chip;
+
+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;
+ struct iio_channel *iio;
+ struct adc_tm5_chip *chip;
+ struct thermal_zone_device *tzd;
+};
+
+/**
+ * struct adc_tm5_chip - ADC Thermal Monitoring properties
+ * @nchannels: amount of channels defined/allocated
+ * @decimation: sampling rate supported for the channel.
+ * @avg_samples: ability to provide single result from the ADC
+ * that is an average of multiple measurements.
+ * @base: base address of TM 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;
+};
+
+static const struct adc_tm5_data adc_tm5_data_pmic = {
+ .full_scale_code_volt = 0x70e4,
+ .decimation = (unsigned int []) {250, 420, 840},
+ .hw_settle = (unsigned int []) {15, 100, 200, 300, 400, 500, 600, 700,
+ 1, 2, 4, 8, 16, 32, 64, 128},
+};
+
+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 = 0, i = 0;
+
+ ret = adc_tm5_read(chip, ADC_TM5_STATUS_LOW, &status_low, 1);
+ if (ret) {
+ dev_err(chip->dev, "read status low failed with %d\n", ret);
+ return IRQ_HANDLED;
+ }
+
+ ret = adc_tm5_read(chip, ADC_TM5_STATUS_HIGH, &status_high, 1);
+ if (ret) {
+ dev_err(chip->dev, "read 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;
+
+ if (!chip->channels[i].tzd) {
+ dev_err_once(chip->dev, "thermal device not found\n");
+ continue;
+ }
+
+ ret = adc_tm5_read(chip, ADC_TM5_M_EN(ch), &ctl, 1);
+
+ if (ret) {
+ dev_err(chip->dev, "ctl read failed with %d\n", ret);
+ continue;
+ }
+
+ lower_set = (status_low & BIT(ch)) &&
+ (ctl & ADC_TM5_M_MEAS_EN) &&
+ (ctl & ADC_TM5_M_LOW_THR_INT_EN);
+
+ upper_set = (status_high & BIT(ch)) &&
+ (ctl & ADC_TM5_M_MEAS_EN) &&
+ (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 int adc_tm5_get_temp(void *data, int *temp)
+{
+ struct adc_tm5_channel *channel = data;
+ int ret, milli_celsius;
+
+ if (!channel || !channel->iio)
+ return -EINVAL;
+
+ ret = iio_read_channel_processed(channel->iio, &milli_celsius);
+ if (ret < 0)
+ return ret;
+
+ *temp = milli_celsius;
+
+ 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);
+}
+
+static int adc_tm5_configure(struct adc_tm5_channel *channel, int low_temp, int high_temp)
+{
+ struct adc_tm5_chip *chip = channel->chip;
+ u8 buf[8];
+ u16 reg = ADC_TM5_M_ADC_CH_SEL_CTL(channel->channel);
+ int ret = 0;
+
+ ret = adc_tm5_read(chip, reg, buf, 8);
+ if (ret) {
+ dev_err(chip->dev, "block read failed with %d\n", ret);
+ return ret;
+ }
+
+ /* Update ADC channel select */
+ buf[0] = channel->adc_channel;
+
+ /* Warm temperature corresponds to low voltage threshold */
+ if (high_temp != INT_MAX) {
+ u16 adc_code = qcom_adc_tm5_temp_volt_scale(channel->prescale,
+ chip->data->full_scale_code_volt, high_temp);
+
+ buf[1] = adc_code & 0xff;
+ buf[2] = adc_code >> 8;
+ buf[7] |= ADC_TM5_M_LOW_THR_INT_EN;
+ }
+
+ /* Cool temperature corresponds to high voltage threshold */
+ if (low_temp != -INT_MAX) {
+ u16 adc_code = qcom_adc_tm5_temp_volt_scale(channel->prescale,
+ chip->data->full_scale_code_volt, low_temp);
+
+ buf[3] = adc_code & 0xff;
+ buf[4] = adc_code >> 8;
+ buf[7] |= ADC_TM5_M_HIGH_THR_INT_EN;
+ }
+
+ /* Update timer select */
+ 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, 8);
+ if (ret)
+ dev_err(chip->dev, "buf write failed\n");
+
+ return ret;
+}
+
+static int adc_tm5_set_trips(void *data, int low_temp, int high_temp)
+{
+ struct adc_tm5_channel *channel = data;
+ struct adc_tm5_chip *chip;
+ int ret;
+
+ if (!channel)
+ return -EINVAL;
+
+ chip = channel->chip;
+ dev_dbg(chip->dev, "%d:low_temp(mdegC):%d, high_temp(mdegC):%d\n",
+ channel->channel, low_temp, high_temp);
+
+ if (high_temp == INT_MAX && low_temp <= -INT_MAX)
+ ret = adc_tm5_disable_channel(channel);
+ else
+ ret = adc_tm5_configure(channel, low_temp, high_temp);
+
+ return ret;
+}
+
+static struct thermal_zone_of_device_ops adc_tm5_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_zone_of_sensor_register(adc_tm->dev,
+ adc_tm->channels[i].channel,
+ &adc_tm->channels[i],
+ &adc_tm5_ops);
+ if (IS_ERR(tzd)) {
+ dev_err(adc_tm->dev, "Error registering TZ zone:%ld for channel:%d\n",
+ PTR_ERR(tzd), adc_tm->channels[i].channel);
+ continue;
+ }
+ adc_tm->channels[i].tzd = tzd;
+ }
+
+ return 0;
+}
+
+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, 1);
+ if (ret) {
+ dev_err(chip->dev, "read failed for BTM channels\n");
+ return ret;
+ }
+
+ ret = adc_tm5_read(chip, ADC_TM5_ADC_DIG_PARAM, buf, 4);
+ if (ret) {
+ dev_err(chip->dev, "block read failed with %d\n", ret);
+ return ret;
+ }
+
+ /* Select decimation */
+ buf[0] = chip->decimation;
+
+ /* Select number of samples in fast average mode */
+ buf[1] = chip->avg_samples | ADC_TM5_FAST_AVG_EN;
+
+ /* Select timer1 */
+ buf[2] = ADC_TM5_TIMER1;
+
+ /* Select timer2 and timer3 */
+ 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, 4);
+ if (ret)
+ dev_err(chip->dev, "block write failed with %d\n", 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;
+ }
+ }
+
+ 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];
+ int ret;
+ struct device *dev = adc_tm->dev;
+
+ ret = of_property_read_u32(node, "reg", &chan);
+ if (ret) {
+ dev_err(dev, "invalid channel number %s\n", name);
+ return ret;
+ }
+
+ if (chan >= ADC_TM5_NUM_CHANNELS) {
+ dev_err(dev, "%s invalid channel number %d\n", name, chan);
+ return -EINVAL;
+ }
+
+ /* the channel has DT description */
+ channel->channel = chan;
+
+ ret = of_property_read_u32(node, "qcom,adc-channel", &chan);
+ if (ret) {
+ dev_err(dev, "invalid channel number %s\n", name);
+ return ret;
+ }
+ if (chan >= ADC5_MAX_CHANNEL) {
+ dev_err(dev, "%s invalid ADC channel number %d\n", name, chan);
+ return ret;
+ }
+ channel->adc_channel = chan;
+
+ channel->iio = devm_of_iio_channel_get_by_name(adc_tm->dev, node, NULL);
+ if (IS_ERR(channel->iio)) {
+ ret = PTR_ERR(channel->iio);
+ channel->iio = NULL;
+ dev_err(dev, "error getting channel %s: %d\n", name, ret);
+ return ret;
+ }
+
+ 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, "%02x invalid pre-scaling <%d %d>\n",
+ chan, 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", &value);
+ if (!ret) {
+ ret = qcom_adc5_hw_settle_time_from_dt(value, adc_tm->data->hw_settle);
+ if (ret < 0) {
+ dev_err(dev, "%02x invalid hw-settle-time %d us\n",
+ chan, 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;
+
+ return 0;
+}
+
+static int adc_tm5_get_dt_data(struct adc_tm5_chip *adc_tm, struct device_node *node)
+{
+ struct adc_tm5_channel *channels;
+ struct device_node *child;
+ unsigned int index = 0;
+ 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(node, child) {
+ ret = adc_tm5_get_dt_channel_data(adc_tm, channels, child);
+ if (ret) {
+ of_node_put(child);
+ return ret;
+ }
+
+ channels++;
+ index++;
+ }
+
+ 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", &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) {
+ dev_err(dev, "get_irq failed: %d\n", irq);
+ return irq;
+ }
+
+ ret = adc_tm5_get_dt_data(adc_tm, node);
+ if (ret) {
+ dev_err(dev, "get dt data failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = adc_tm5_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_irq(dev, irq, adc_tm5_isr, 0,
+ "pm-adc-tm5", adc_tm);
+}
+
+static const struct of_device_id adc_tm5_match_table[] = {
+ {
+ .compatible = "qcom,spmi-adc-tm5",
+ .data = &adc_tm5_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");
--
2.28.0