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openwrt/target/linux/ipq806x/patches-4.19/0063-1-ipq806x-tsens-driver.patch
LEAN-ESX bb53dab94b OpenWrt 18.6.4: sync to stable code version
2019-10-28 01:56:09 -07:00

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From 3302e1e1a3cfa4e67fda2a61d6f0c42205d40932 Mon Sep 17 00:00:00 2001
From: Rajith Cherian <rajith@codeaurora.org>
Date: Tue, 14 Feb 2017 18:30:43 +0530
Subject: [PATCH] ipq8064: tsens: Base tsens driver for IPQ8064
Add TSENS driver template to support IPQ8064.
This is a base file copied from tsens-8960.c
Change-Id: I47c573fdfa2d898243c6a6ba952d1632f91391f7
Signed-off-by: Rajith Cherian <rajith@codeaurora.org>
ipq8064: tsens: TSENS driver support for IPQ8064
Support for IPQ8064 tsens driver. The driver works
with the thermal framework. The driver overrides the
following fucntionalities:
1. Get current temperature.
2. Get/Set trip temperatures.
3. Enabled/Disable trip points.
4. ISR for threshold generated interrupt.
5. Notify userspace when trip points are hit.
Change-Id: I8bc7204fd627d10875ab13fc1de8cb6c2ed7a918
Signed-off-by: Rajith Cherian <rajith@codeaurora.org>
---
--- a/drivers/thermal/qcom/Makefile
+++ b/drivers/thermal/qcom/Makefile
@@ -1,2 +1,3 @@
obj-$(CONFIG_QCOM_TSENS) += qcom_tsens.o
-qcom_tsens-y += tsens.o tsens-common.o tsens-8916.o tsens-8974.o tsens-8960.o tsens-v2.o
+qcom_tsens-y += tsens.o tsens-common.o tsens-8916.o tsens-8974.o tsens-8960.o tsens-v2.o \
+ tsens-ipq8064.o
--- /dev/null
+++ b/drivers/thermal/qcom/tsens-ipq8064.c
@@ -0,0 +1,551 @@
+/*
+ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+#include <linux/regmap.h>
+#include <linux/thermal.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include "tsens.h"
+
+#define CAL_MDEGC 30000
+
+#define CONFIG_ADDR 0x3640
+/* CONFIG_ADDR bitmasks */
+#define CONFIG 0x9b
+#define CONFIG_MASK 0xf
+#define CONFIG_SHIFT 0
+
+#define STATUS_CNTL_8064 0x3660
+#define CNTL_ADDR 0x3620
+/* CNTL_ADDR bitmasks */
+#define EN BIT(0)
+#define SW_RST BIT(1)
+#define SENSOR0_EN BIT(3)
+#define SLP_CLK_ENA BIT(26)
+#define MEASURE_PERIOD 1
+#define SENSOR0_SHIFT 3
+
+/* INT_STATUS_ADDR bitmasks */
+#define MIN_STATUS_MASK BIT(0)
+#define LOWER_STATUS_CLR BIT(1)
+#define UPPER_STATUS_CLR BIT(2)
+#define MAX_STATUS_MASK BIT(3)
+
+#define THRESHOLD_ADDR 0x3624
+/* THRESHOLD_ADDR bitmasks */
+#define THRESHOLD_MAX_CODE 0x20000
+#define THRESHOLD_MIN_CODE 0
+#define THRESHOLD_MAX_LIMIT_SHIFT 24
+#define THRESHOLD_MIN_LIMIT_SHIFT 16
+#define THRESHOLD_UPPER_LIMIT_SHIFT 8
+#define THRESHOLD_LOWER_LIMIT_SHIFT 0
+#define THRESHOLD_MAX_LIMIT_MASK (THRESHOLD_MAX_CODE << \
+ THRESHOLD_MAX_LIMIT_SHIFT)
+#define THRESHOLD_MIN_LIMIT_MASK (THRESHOLD_MAX_CODE << \
+ THRESHOLD_MIN_LIMIT_SHIFT)
+#define THRESHOLD_UPPER_LIMIT_MASK (THRESHOLD_MAX_CODE << \
+ THRESHOLD_UPPER_LIMIT_SHIFT)
+#define THRESHOLD_LOWER_LIMIT_MASK (THRESHOLD_MAX_CODE << \
+ THRESHOLD_LOWER_LIMIT_SHIFT)
+
+/* Initial temperature threshold values */
+#define LOWER_LIMIT_TH 0x9d /* 95C */
+#define UPPER_LIMIT_TH 0xa6 /* 105C */
+#define MIN_LIMIT_TH 0x0
+#define MAX_LIMIT_TH 0xff
+
+#define S0_STATUS_ADDR 0x3628
+#define STATUS_ADDR_OFFSET 2
+#define SENSOR_STATUS_SIZE 4
+#define INT_STATUS_ADDR 0x363c
+#define TRDY_MASK BIT(7)
+#define TIMEOUT_US 100
+
+#define TSENS_EN BIT(0)
+#define TSENS_SW_RST BIT(1)
+#define TSENS_ADC_CLK_SEL BIT(2)
+#define SENSOR0_EN BIT(3)
+#define SENSOR1_EN BIT(4)
+#define SENSOR2_EN BIT(5)
+#define SENSOR3_EN BIT(6)
+#define SENSOR4_EN BIT(7)
+#define SENSORS_EN (SENSOR0_EN | SENSOR1_EN | \
+ SENSOR2_EN | SENSOR3_EN | SENSOR4_EN)
+#define TSENS_8064_SENSOR5_EN BIT(8)
+#define TSENS_8064_SENSOR6_EN BIT(9)
+#define TSENS_8064_SENSOR7_EN BIT(10)
+#define TSENS_8064_SENSOR8_EN BIT(11)
+#define TSENS_8064_SENSOR9_EN BIT(12)
+#define TSENS_8064_SENSOR10_EN BIT(13)
+#define TSENS_8064_SENSORS_EN (SENSORS_EN | \
+ TSENS_8064_SENSOR5_EN | \
+ TSENS_8064_SENSOR6_EN | \
+ TSENS_8064_SENSOR7_EN | \
+ TSENS_8064_SENSOR8_EN | \
+ TSENS_8064_SENSOR9_EN | \
+ TSENS_8064_SENSOR10_EN)
+
+#define TSENS_8064_SEQ_SENSORS 5
+#define TSENS_8064_S4_S5_OFFSET 40
+#define TSENS_FACTOR 1
+
+/* Trips: from very hot to very cold */
+enum tsens_trip_type {
+ TSENS_TRIP_STAGE3 = 0,
+ TSENS_TRIP_STAGE2,
+ TSENS_TRIP_STAGE1,
+ TSENS_TRIP_STAGE0,
+ TSENS_TRIP_NUM,
+};
+
+u32 tsens_8064_slope[] = {
+ 1176, 1176, 1154, 1176,
+ 1111, 1132, 1132, 1199,
+ 1132, 1199, 1132
+ };
+
+/* Temperature on y axis and ADC-code on x-axis */
+static inline int code_to_degC(u32 adc_code, const struct tsens_sensor *s)
+{
+ int degcbeforefactor, degc;
+
+ degcbeforefactor = (adc_code * s->slope) + s->offset;
+
+ if (degcbeforefactor == 0)
+ degc = degcbeforefactor;
+ else if (degcbeforefactor > 0)
+ degc = (degcbeforefactor + TSENS_FACTOR/2)
+ / TSENS_FACTOR;
+ else
+ degc = (degcbeforefactor - TSENS_FACTOR/2)
+ / TSENS_FACTOR;
+
+ return degc;
+}
+
+static int degC_to_code(int degC, const struct tsens_sensor *s)
+{
+ int code = ((degC * TSENS_FACTOR - s->offset) + (s->slope/2))
+ / s->slope;
+
+ if (code > THRESHOLD_MAX_CODE)
+ code = THRESHOLD_MAX_CODE;
+ else if (code < THRESHOLD_MIN_CODE)
+ code = THRESHOLD_MIN_CODE;
+ return code;
+}
+
+static int suspend_ipq8064(struct tsens_device *tmdev)
+{
+ int ret;
+ unsigned int mask;
+ struct regmap *map = tmdev->map;
+
+ ret = regmap_read(map, THRESHOLD_ADDR, &tmdev->ctx.threshold);
+ if (ret)
+ return ret;
+
+ ret = regmap_read(map, CNTL_ADDR, &tmdev->ctx.control);
+ if (ret)
+ return ret;
+
+ mask = SLP_CLK_ENA | EN;
+
+ ret = regmap_update_bits(map, CNTL_ADDR, mask, 0);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int resume_ipq8064(struct tsens_device *tmdev)
+{
+ int ret;
+ struct regmap *map = tmdev->map;
+
+ ret = regmap_update_bits(map, CNTL_ADDR, SW_RST, SW_RST);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(map, CONFIG_ADDR, CONFIG_MASK, CONFIG);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(map, THRESHOLD_ADDR, tmdev->ctx.threshold);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(map, CNTL_ADDR, tmdev->ctx.control);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static void notify_uspace_tsens_fn(struct work_struct *work)
+{
+ struct tsens_sensor *s = container_of(work, struct tsens_sensor,
+ notify_work);
+
+ sysfs_notify(&s->tzd->device.kobj, NULL, "type");
+}
+
+static void tsens_scheduler_fn(struct work_struct *work)
+{
+ struct tsens_device *tmdev = container_of(work, struct tsens_device,
+ tsens_work);
+ unsigned int threshold, threshold_low, code, reg, sensor, mask;
+ unsigned int sensor_addr;
+ bool upper_th_x, lower_th_x;
+ int adc_code, ret;
+
+ ret = regmap_read(tmdev->map, STATUS_CNTL_8064, &reg);
+ if (ret)
+ return;
+ reg = reg | LOWER_STATUS_CLR | UPPER_STATUS_CLR;
+ ret = regmap_write(tmdev->map, STATUS_CNTL_8064, reg);
+ if (ret)
+ return;
+
+ mask = ~(LOWER_STATUS_CLR | UPPER_STATUS_CLR);
+ ret = regmap_read(tmdev->map, THRESHOLD_ADDR, &threshold);
+ if (ret)
+ return;
+ threshold_low = (threshold & THRESHOLD_LOWER_LIMIT_MASK)
+ >> THRESHOLD_LOWER_LIMIT_SHIFT;
+ threshold = (threshold & THRESHOLD_UPPER_LIMIT_MASK)
+ >> THRESHOLD_UPPER_LIMIT_SHIFT;
+
+ ret = regmap_read(tmdev->map, STATUS_CNTL_8064, &reg);
+ if (ret)
+ return;
+
+ ret = regmap_read(tmdev->map, CNTL_ADDR, &sensor);
+ if (ret)
+ return;
+ sensor &= (uint32_t) TSENS_8064_SENSORS_EN;
+ sensor >>= SENSOR0_SHIFT;
+
+ /* Constraint: There is only 1 interrupt control register for all
+ * 11 temperature sensor. So monitoring more than 1 sensor based
+ * on interrupts will yield inconsistent result. To overcome this
+ * issue we will monitor only sensor 0 which is the master sensor.
+ */
+
+ /* Skip if the sensor is disabled */
+ if (sensor & 1) {
+ ret = regmap_read(tmdev->map, tmdev->sensor[0].status, &code);
+ if (ret)
+ return;
+ upper_th_x = code >= threshold;
+ lower_th_x = code <= threshold_low;
+ if (upper_th_x)
+ mask |= UPPER_STATUS_CLR;
+ if (lower_th_x)
+ mask |= LOWER_STATUS_CLR;
+ if (upper_th_x || lower_th_x) {
+ /* Notify user space */
+ schedule_work(&tmdev->sensor[0].notify_work);
+ regmap_read(tmdev->map, sensor_addr, &adc_code);
+ pr_debug("Trigger (%d degrees) for sensor %d\n",
+ code_to_degC(adc_code, &tmdev->sensor[0]), 0);
+ }
+ }
+ regmap_write(tmdev->map, STATUS_CNTL_8064, reg & mask);
+
+ /* force memory to sync */
+ mb();
+}
+
+static irqreturn_t tsens_isr(int irq, void *data)
+{
+ struct tsens_device *tmdev = data;
+
+ schedule_work(&tmdev->tsens_work);
+ return IRQ_HANDLED;
+}
+
+static void hw_init(struct tsens_device *tmdev)
+{
+ int ret;
+ unsigned int reg_cntl = 0, reg_cfg = 0, reg_thr = 0;
+ unsigned int reg_status_cntl = 0;
+
+ regmap_read(tmdev->map, CNTL_ADDR, &reg_cntl);
+ regmap_write(tmdev->map, CNTL_ADDR, reg_cntl | TSENS_SW_RST);
+
+ reg_cntl |= SLP_CLK_ENA | (MEASURE_PERIOD << 18)
+ | (((1 << tmdev->num_sensors) - 1) << SENSOR0_SHIFT);
+ regmap_write(tmdev->map, CNTL_ADDR, reg_cntl);
+ regmap_read(tmdev->map, STATUS_CNTL_8064, &reg_status_cntl);
+ reg_status_cntl |= LOWER_STATUS_CLR | UPPER_STATUS_CLR
+ | MIN_STATUS_MASK | MAX_STATUS_MASK;
+ regmap_write(tmdev->map, STATUS_CNTL_8064, reg_status_cntl);
+ reg_cntl |= TSENS_EN;
+ regmap_write(tmdev->map, CNTL_ADDR, reg_cntl);
+
+ regmap_read(tmdev->map, CONFIG_ADDR, &reg_cfg);
+ reg_cfg = (reg_cfg & ~CONFIG_MASK) | (CONFIG << CONFIG_SHIFT);
+ regmap_write(tmdev->map, CONFIG_ADDR, reg_cfg);
+
+ reg_thr |= (LOWER_LIMIT_TH << THRESHOLD_LOWER_LIMIT_SHIFT)
+ | (UPPER_LIMIT_TH << THRESHOLD_UPPER_LIMIT_SHIFT)
+ | (MIN_LIMIT_TH << THRESHOLD_MIN_LIMIT_SHIFT)
+ | (MAX_LIMIT_TH << THRESHOLD_MAX_LIMIT_SHIFT);
+
+ regmap_write(tmdev->map, THRESHOLD_ADDR, reg_thr);
+
+ ret = devm_request_irq(tmdev->dev, tmdev->tsens_irq, tsens_isr,
+ IRQF_TRIGGER_RISING, "tsens_interrupt", tmdev);
+ if (ret < 0) {
+ pr_err("%s: request_irq FAIL: %d\n", __func__, ret);
+ return;
+ }
+
+ INIT_WORK(&tmdev->tsens_work, tsens_scheduler_fn);
+}
+
+static int init_ipq8064(struct tsens_device *tmdev)
+{
+ int ret, i;
+ u32 reg_cntl, offset = 0;
+
+ init_common(tmdev);
+ if (!tmdev->map)
+ return -ENODEV;
+
+ /*
+ * The status registers for each sensor are discontiguous
+ * because some SoCs have 5 sensors while others have more
+ * but the control registers stay in the same place, i.e
+ * directly after the first 5 status registers.
+ */
+ for (i = 0; i < tmdev->num_sensors; i++) {
+ if (i >= TSENS_8064_SEQ_SENSORS)
+ offset = TSENS_8064_S4_S5_OFFSET;
+
+ tmdev->sensor[i].status = S0_STATUS_ADDR + offset
+ + (i << STATUS_ADDR_OFFSET);
+ tmdev->sensor[i].slope = tsens_8064_slope[i];
+ INIT_WORK(&tmdev->sensor[i].notify_work,
+ notify_uspace_tsens_fn);
+ }
+
+ reg_cntl = SW_RST;
+ ret = regmap_update_bits(tmdev->map, CNTL_ADDR, SW_RST, reg_cntl);
+ if (ret)
+ return ret;
+
+ reg_cntl |= SLP_CLK_ENA | (MEASURE_PERIOD << 18);
+ reg_cntl &= ~SW_RST;
+ ret = regmap_update_bits(tmdev->map, CONFIG_ADDR,
+ CONFIG_MASK, CONFIG);
+
+ reg_cntl |= GENMASK(tmdev->num_sensors - 1, 0) << SENSOR0_SHIFT;
+ ret = regmap_write(tmdev->map, CNTL_ADDR, reg_cntl);
+ if (ret)
+ return ret;
+
+ reg_cntl |= EN;
+ ret = regmap_write(tmdev->map, CNTL_ADDR, reg_cntl);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int calibrate_ipq8064(struct tsens_device *tmdev)
+{
+ int i;
+ char *data, *data_backup;
+
+ ssize_t num_read = tmdev->num_sensors;
+ struct tsens_sensor *s = tmdev->sensor;
+
+ data = qfprom_read(tmdev->dev, "calib");
+ if (IS_ERR(data)) {
+ pr_err("Calibration not found.\n");
+ return PTR_ERR(data);
+ }
+
+ data_backup = qfprom_read(tmdev->dev, "calib_backup");
+ if (IS_ERR(data_backup)) {
+ pr_err("Backup calibration not found.\n");
+ return PTR_ERR(data_backup);
+ }
+
+ for (i = 0; i < num_read; i++) {
+ s[i].calib_data = readb_relaxed(data + i);
+ s[i].calib_data_backup = readb_relaxed(data_backup + i);
+
+ if (s[i].calib_data_backup)
+ s[i].calib_data = s[i].calib_data_backup;
+ if (!s[i].calib_data) {
+ pr_err("QFPROM TSENS calibration data not present\n");
+ return -ENODEV;
+ }
+ s[i].slope = tsens_8064_slope[i];
+ s[i].offset = CAL_MDEGC - (s[i].calib_data * s[i].slope);
+ }
+
+ hw_init(tmdev);
+
+ return 0;
+}
+
+static int get_temp_ipq8064(struct tsens_device *tmdev, int id, int *temp)
+{
+ int ret;
+ u32 code, trdy;
+ const struct tsens_sensor *s = &tmdev->sensor[id];
+ unsigned long timeout;
+
+ timeout = jiffies + usecs_to_jiffies(TIMEOUT_US);
+ do {
+ ret = regmap_read(tmdev->map, INT_STATUS_ADDR, &trdy);
+ if (ret)
+ return ret;
+ if (!(trdy & TRDY_MASK))
+ continue;
+ ret = regmap_read(tmdev->map, s->status, &code);
+ if (ret)
+ return ret;
+ *temp = code_to_degC(code, s);
+ return 0;
+ } while (time_before(jiffies, timeout));
+
+ return -ETIMEDOUT;
+}
+
+static int set_trip_temp_ipq8064(void *data, int trip, int temp)
+{
+ unsigned int reg_th, reg_cntl;
+ int ret, code, code_chk, hi_code, lo_code;
+ const struct tsens_sensor *s = data;
+ struct tsens_device *tmdev = s->tmdev;
+
+ code_chk = code = degC_to_code(temp, s);
+
+ if (code < THRESHOLD_MIN_CODE || code > THRESHOLD_MAX_CODE)
+ return -EINVAL;
+
+ ret = regmap_read(tmdev->map, STATUS_CNTL_8064, &reg_cntl);
+ if (ret)
+ return ret;
+
+ ret = regmap_read(tmdev->map, THRESHOLD_ADDR, &reg_th);
+ if (ret)
+ return ret;
+
+ hi_code = (reg_th & THRESHOLD_UPPER_LIMIT_MASK)
+ >> THRESHOLD_UPPER_LIMIT_SHIFT;
+ lo_code = (reg_th & THRESHOLD_LOWER_LIMIT_MASK)
+ >> THRESHOLD_LOWER_LIMIT_SHIFT;
+
+ switch (trip) {
+ case TSENS_TRIP_STAGE3:
+ code <<= THRESHOLD_MAX_LIMIT_SHIFT;
+ reg_th &= ~THRESHOLD_MAX_LIMIT_MASK;
+ break;
+ case TSENS_TRIP_STAGE2:
+ if (code_chk <= lo_code)
+ return -EINVAL;
+ code <<= THRESHOLD_UPPER_LIMIT_SHIFT;
+ reg_th &= ~THRESHOLD_UPPER_LIMIT_MASK;
+ break;
+ case TSENS_TRIP_STAGE1:
+ if (code_chk >= hi_code)
+ return -EINVAL;
+ code <<= THRESHOLD_LOWER_LIMIT_SHIFT;
+ reg_th &= ~THRESHOLD_LOWER_LIMIT_MASK;
+ break;
+ case TSENS_TRIP_STAGE0:
+ code <<= THRESHOLD_MIN_LIMIT_SHIFT;
+ reg_th &= ~THRESHOLD_MIN_LIMIT_MASK;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = regmap_write(tmdev->map, THRESHOLD_ADDR, reg_th | code);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int set_trip_activate_ipq8064(void *data, int trip,
+ enum thermal_trip_activation_mode mode)
+{
+ unsigned int reg_cntl, mask, val;
+ const struct tsens_sensor *s = data;
+ struct tsens_device *tmdev = s->tmdev;
+ int ret;
+
+ if (!tmdev || trip < 0)
+ return -EINVAL;
+
+ ret = regmap_read(tmdev->map, STATUS_CNTL_8064, &reg_cntl);
+ if (ret)
+ return ret;
+
+ switch (trip) {
+ case TSENS_TRIP_STAGE3:
+ mask = MAX_STATUS_MASK;
+ break;
+ case TSENS_TRIP_STAGE2:
+ mask = UPPER_STATUS_CLR;
+ break;
+ case TSENS_TRIP_STAGE1:
+ mask = LOWER_STATUS_CLR;
+ break;
+ case TSENS_TRIP_STAGE0:
+ mask = MIN_STATUS_MASK;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (mode == THERMAL_TRIP_ACTIVATION_DISABLED)
+ val = reg_cntl | mask;
+ else
+ val = reg_cntl & ~mask;
+
+ ret = regmap_write(tmdev->map, STATUS_CNTL_8064, val);
+ if (ret)
+ return ret;
+
+ /* force memory to sync */
+ mb();
+ return 0;
+}
+
+const struct tsens_ops ops_ipq8064 = {
+ .init = init_ipq8064,
+ .calibrate = calibrate_ipq8064,
+ .get_temp = get_temp_ipq8064,
+ .suspend = suspend_ipq8064,
+ .resume = resume_ipq8064,
+ .set_trip_temp = set_trip_temp_ipq8064,
+ .set_trip_activate = set_trip_activate_ipq8064,
+};
+
+const struct tsens_data data_ipq8064 = {
+ .num_sensors = 11,
+ .ops = &ops_ipq8064,
+};
--- a/drivers/thermal/qcom/tsens.c
+++ b/drivers/thermal/qcom/tsens.c
@@ -75,8 +75,11 @@ static const struct of_device_id tsens_t
}, {
.compatible = "qcom,tsens-v2",
.data = &data_tsens_v2,
+ }, {
+ .compatible = "qcom,ipq8064-tsens",
+ .data = &data_ipq8064,
},
- {}
+ {}
};
MODULE_DEVICE_TABLE(of, tsens_table);
--- a/drivers/thermal/qcom/tsens.h
+++ b/drivers/thermal/qcom/tsens.h
@@ -89,7 +89,7 @@ int init_common(struct tsens_device *);
int get_temp_common(struct tsens_device *, int, int *);
/* TSENS v1 targets */
-extern const struct tsens_data data_8916, data_8974, data_8960;
+extern const struct tsens_data data_8916, data_8974, data_8960, data_ipq8064;
/* TSENS v2 targets */
extern const struct tsens_data data_8996, data_tsens_v2;
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