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Message-ID: <20241115103957.1157495-4-quic_mmanikan@quicinc.com>
Date: Fri, 15 Nov 2024 16:09:53 +0530
From: Manikanta Mylavarapu <quic_mmanikan@...cinc.com>
To: <srinivas.kandagatla@...aro.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
<conor+dt@...nel.org>, <amitk@...nel.org>, <thara.gopinath@...il.com>,
<rafael@...nel.org>, <daniel.lezcano@...aro.org>,
<rui.zhang@...el.com>, <lukasz.luba@....com>, <andersson@...nel.org>,
<konradybcio@...nel.org>, <linux-arm-msm@...r.kernel.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-pm@...r.kernel.org>
CC: <quic_srichara@...cinc.com>, <quic_varada@...cinc.com>
Subject: [PATCH v8 3/7] thermal/drivers/tsens: Add TSENS enable and calibration support for V2
From: Praveenkumar I <quic_ipkumar@...cinc.com>
SoCs without RPM need to enable sensors and calibrate them from the kernel.
The IPQ5332 and IPQ5424 use the tsens v2.3.3 IP and do not have RPM.
Therefore, add a new calibration function for V2, as the tsens.c calib
function only supports V1. Also add new feature_config, ops and data for
IPQ5332, IPQ5424.
Although the TSENS IP supports 16 sensors, not all are used. The hw_id
is used to enable the relevant sensors.
Signed-off-by: Praveenkumar I <quic_ipkumar@...cinc.com>
Signed-off-by: Manikanta Mylavarapu <quic_mmanikan@...cinc.com>
---
Changes in V8:
- Replace fallthrough with break in TWO_PT_CALIB case in
tsens_v2_calibrate_sensor()
- Update the sensor name during the sensor offset reading in
tsens_v2_calibrate_sensor()
drivers/thermal/qcom/tsens-v2.c | 176 ++++++++++++++++++++++++++++++++
drivers/thermal/qcom/tsens.c | 8 +-
drivers/thermal/qcom/tsens.h | 4 +-
3 files changed, 186 insertions(+), 2 deletions(-)
diff --git a/drivers/thermal/qcom/tsens-v2.c b/drivers/thermal/qcom/tsens-v2.c
index 0cb7301eca6e..5591f19e1857 100644
--- a/drivers/thermal/qcom/tsens-v2.c
+++ b/drivers/thermal/qcom/tsens-v2.c
@@ -4,13 +4,32 @@
* Copyright (c) 2018, Linaro Limited
*/
+#include <linux/bitfield.h>
#include <linux/bitops.h>
#include <linux/regmap.h>
+#include <linux/nvmem-consumer.h>
#include "tsens.h"
/* ----- SROT ------ */
#define SROT_HW_VER_OFF 0x0000
#define SROT_CTRL_OFF 0x0004
+#define SROT_MEASURE_PERIOD 0x0008
+#define SROT_Sn_CONVERSION 0x0060
+#define V2_SHIFT_DEFAULT 0x0003
+#define V2_SLOPE_DEFAULT 0x0cd0
+#define V2_CZERO_DEFAULT 0x016a
+#define ONE_PT_SLOPE 0x0cd0
+#define TWO_PT_SHIFTED_GAIN 921600
+#define ONE_PT_CZERO_CONST 94
+#define SW_RST_DEASSERT 0x0
+#define SW_RST_ASSERT 0x1
+#define MEASURE_PERIOD_2mSEC 0x1
+#define RSEULT_FORMAT_TEMP 0x1
+#define TSENS_ENABLE 0x1
+#define SENSOR_CONVERSION(n) (((n) * 4) + SROT_Sn_CONVERSION)
+#define CONVERSION_SHIFT_MASK GENMASK(24, 23)
+#define CONVERSION_SLOPE_MASK GENMASK(22, 10)
+#define CONVERSION_CZERO_MASK GENMASK(9, 0)
/* ----- TM ------ */
#define TM_INT_EN_OFF 0x0004
@@ -50,6 +69,17 @@ static struct tsens_features ipq8074_feat = {
.trip_max_temp = 204000,
};
+static struct tsens_features ipq5332_feat = {
+ .ver_major = VER_2_X_NO_RPM,
+ .crit_int = 1,
+ .combo_int = 1,
+ .adc = 0,
+ .srot_split = 1,
+ .max_sensors = 16,
+ .trip_min_temp = 0,
+ .trip_max_temp = 204000,
+};
+
static const struct reg_field tsens_v2_regfields[MAX_REGFIELDS] = {
/* ----- SROT ------ */
/* VERSION */
@@ -59,6 +89,10 @@ static const struct reg_field tsens_v2_regfields[MAX_REGFIELDS] = {
/* CTRL_OFF */
[TSENS_EN] = REG_FIELD(SROT_CTRL_OFF, 0, 0),
[TSENS_SW_RST] = REG_FIELD(SROT_CTRL_OFF, 1, 1),
+ [SENSOR_EN] = REG_FIELD(SROT_CTRL_OFF, 3, 18),
+ [CODE_OR_TEMP] = REG_FIELD(SROT_CTRL_OFF, 21, 21),
+
+ [MAIN_MEASURE_PERIOD] = REG_FIELD(SROT_MEASURE_PERIOD, 0, 7),
/* ----- TM ------ */
/* INTERRUPT ENABLE */
@@ -104,6 +138,126 @@ static const struct reg_field tsens_v2_regfields[MAX_REGFIELDS] = {
[TRDY] = REG_FIELD(TM_TRDY_OFF, 0, 0),
};
+static int tsens_v2_calibrate_sensor(struct device *dev, struct tsens_sensor *sensor,
+ struct regmap *map, u32 mode, u32 base0, u32 base1)
+{
+ u32 shift = V2_SHIFT_DEFAULT;
+ u32 slope = V2_SLOPE_DEFAULT, czero = V2_CZERO_DEFAULT, val;
+ char name[20];
+ int ret;
+
+ /* Read offset value */
+ ret = snprintf(name, sizeof(name), "tsens_sens%d_off", sensor->hw_id);
+ if (ret < 0)
+ return ret;
+
+ ret = nvmem_cell_read_variable_le_u32(dev, name, &sensor->offset);
+ if (ret)
+ return ret;
+
+ /* Based on calib mode, program SHIFT, SLOPE and CZERO */
+ switch (mode) {
+ case TWO_PT_CALIB:
+ slope = (TWO_PT_SHIFTED_GAIN / (base1 - base0));
+
+ czero = (base0 + sensor->offset - ((base1 - base0) / 3));
+
+ break;
+ case ONE_PT_CALIB2:
+ czero = base0 + sensor->offset - ONE_PT_CZERO_CONST;
+
+ slope = ONE_PT_SLOPE;
+
+ break;
+ default:
+ dev_dbg(dev, "calibrationless mode\n");
+ }
+
+ val = FIELD_PREP(CONVERSION_SHIFT_MASK, shift) |
+ FIELD_PREP(CONVERSION_SLOPE_MASK, slope) |
+ FIELD_PREP(CONVERSION_CZERO_MASK, czero);
+
+ regmap_write(map, SENSOR_CONVERSION(sensor->hw_id), val);
+
+ return 0;
+}
+
+static int tsens_v2_calibration(struct tsens_priv *priv)
+{
+ struct device *dev = priv->dev;
+ u32 mode, base0, base1;
+ int i, ret;
+
+ if (priv->num_sensors > MAX_SENSORS)
+ return -EINVAL;
+
+ ret = nvmem_cell_read_variable_le_u32(priv->dev, "mode", &mode);
+ if (ret == -ENOENT)
+ dev_warn(priv->dev, "Calibration data not present in DT\n");
+ if (ret < 0)
+ return ret;
+
+ dev_dbg(priv->dev, "calibration mode is %d\n", mode);
+
+ ret = nvmem_cell_read_variable_le_u32(priv->dev, "base0", &base0);
+ if (ret < 0)
+ return ret;
+
+ ret = nvmem_cell_read_variable_le_u32(priv->dev, "base1", &base1);
+ if (ret < 0)
+ return ret;
+
+ /* Calibrate each sensor */
+ for (i = 0; i < priv->num_sensors; i++) {
+ ret = tsens_v2_calibrate_sensor(dev, &priv->sensor[i], priv->srot_map,
+ mode, base0, base1);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int __init init_tsens_v2_no_rpm(struct tsens_priv *priv)
+{
+ struct device *dev = priv->dev;
+ int i, ret;
+ u32 val = 0;
+
+ ret = init_common(priv);
+ if (ret < 0)
+ return ret;
+
+ priv->rf[CODE_OR_TEMP] = devm_regmap_field_alloc(dev, priv->srot_map,
+ priv->fields[CODE_OR_TEMP]);
+ if (IS_ERR(priv->rf[CODE_OR_TEMP]))
+ return PTR_ERR(priv->rf[CODE_OR_TEMP]);
+
+ priv->rf[MAIN_MEASURE_PERIOD] = devm_regmap_field_alloc(dev, priv->srot_map,
+ priv->fields[MAIN_MEASURE_PERIOD]);
+ if (IS_ERR(priv->rf[MAIN_MEASURE_PERIOD]))
+ return PTR_ERR(priv->rf[MAIN_MEASURE_PERIOD]);
+
+ regmap_field_write(priv->rf[TSENS_SW_RST], SW_RST_ASSERT);
+
+ regmap_field_write(priv->rf[MAIN_MEASURE_PERIOD], MEASURE_PERIOD_2mSEC);
+
+ /* Enable available sensors */
+ for (i = 0; i < priv->num_sensors; i++)
+ val |= 1 << priv->sensor[i].hw_id;
+
+ regmap_field_write(priv->rf[SENSOR_EN], val);
+
+ /* Select temperature format, unit is deci-Celsius */
+ regmap_field_write(priv->rf[CODE_OR_TEMP], RSEULT_FORMAT_TEMP);
+
+ regmap_field_write(priv->rf[TSENS_SW_RST], SW_RST_DEASSERT);
+
+ regmap_field_write(priv->rf[TSENS_EN], TSENS_ENABLE);
+
+ return 0;
+}
+
static const struct tsens_ops ops_generic_v2 = {
.init = init_common,
.get_temp = get_temp_tsens_valid,
@@ -122,6 +276,28 @@ struct tsens_plat_data data_ipq8074 = {
.fields = tsens_v2_regfields,
};
+static const struct tsens_ops ops_ipq5332 = {
+ .init = init_tsens_v2_no_rpm,
+ .get_temp = get_temp_tsens_valid,
+ .calibrate = tsens_v2_calibration,
+};
+
+struct tsens_plat_data data_ipq5332 = {
+ .num_sensors = 5,
+ .ops = &ops_ipq5332,
+ .hw_ids = (unsigned int []){11, 12, 13, 14, 15},
+ .feat = &ipq5332_feat,
+ .fields = tsens_v2_regfields,
+};
+
+struct tsens_plat_data data_ipq5424 = {
+ .num_sensors = 7,
+ .ops = &ops_ipq5332,
+ .hw_ids = (unsigned int []){9, 10, 11, 12, 13, 14, 15},
+ .feat = &ipq5332_feat,
+ .fields = tsens_v2_regfields,
+};
+
/* Kept around for backward compatibility with old msm8996.dtsi */
struct tsens_plat_data data_8996 = {
.num_sensors = 13,
diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
index 0b4421bf4785..c5409225756f 100644
--- a/drivers/thermal/qcom/tsens.c
+++ b/drivers/thermal/qcom/tsens.c
@@ -975,7 +975,7 @@ int __init init_common(struct tsens_priv *priv)
ret = regmap_field_read(priv->rf[TSENS_EN], &enabled);
if (ret)
goto err_put_device;
- if (!enabled) {
+ if (!enabled && (tsens_version(priv) != VER_2_X_NO_RPM)) {
dev_err(dev, "%s: device not enabled\n", __func__);
ret = -ENODEV;
goto err_put_device;
@@ -1102,6 +1102,12 @@ static SIMPLE_DEV_PM_OPS(tsens_pm_ops, tsens_suspend, tsens_resume);
static const struct of_device_id tsens_table[] = {
{
+ .compatible = "qcom,ipq5332-tsens",
+ .data = &data_ipq5332,
+ }, {
+ .compatible = "qcom,ipq5424-tsens",
+ .data = &data_ipq5424,
+ }, {
.compatible = "qcom,ipq8064-tsens",
.data = &data_8960,
}, {
diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
index cab39de045b1..ac5358e48f74 100644
--- a/drivers/thermal/qcom/tsens.h
+++ b/drivers/thermal/qcom/tsens.h
@@ -35,6 +35,7 @@ enum tsens_ver {
VER_0_1,
VER_1_X,
VER_2_X,
+ VER_2_X_NO_RPM,
};
enum tsens_irq_type {
@@ -168,6 +169,7 @@ enum regfield_ids {
TSENS_SW_RST,
SENSOR_EN,
CODE_OR_TEMP,
+ MAIN_MEASURE_PERIOD,
/* ----- TM ------ */
/* TRDY */
@@ -650,6 +652,6 @@ extern struct tsens_plat_data data_8226, data_8909, data_8916, data_8939, data_8
extern struct tsens_plat_data data_tsens_v1, data_8976, data_8956;
/* TSENS v2 targets */
-extern struct tsens_plat_data data_8996, data_ipq8074, data_tsens_v2;
+extern struct tsens_plat_data data_8996, data_ipq8074, data_ipq5332, data_ipq5424, data_tsens_v2;
#endif /* __QCOM_TSENS_H__ */
--
2.34.1
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