1 files changed, 170 insertions, 49 deletions

diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
index b5b136ff323f..8020ead2794e 100644
--- a/drivers/thermal/qcom/tsens.c
+++ b/drivers/thermal/qcom/tsens.c
@@ -70,6 +70,171 @@ char *qfprom_read(struct device *dev, const char *cname)
 	return ret;
 }
 
+int tsens_read_calibration(struct tsens_priv *priv, int shift, u32 *p1, u32 *p2, bool backup)
+{
+	u32 mode;
+	u32 base1, base2;
+	char name[] = "sXX_pY_backup"; /* s10_p1_backup */
+	int i, ret;
+
+	if (priv->num_sensors > MAX_SENSORS)
+		return -EINVAL;
+
+	ret = snprintf(name, sizeof(name), "mode%s", backup ? "_backup" : "");
+	if (ret < 0)
+		return ret;
+
+	ret = nvmem_cell_read_variable_le_u32(priv->dev, name, &mode);
+	if (ret == -ENOENT)
+		dev_warn(priv->dev, "Please migrate to separate nvmem cells for calibration data\n");
+	if (ret < 0)
+		return ret;
+
+	dev_dbg(priv->dev, "calibration mode is %d\n", mode);
+
+	ret = snprintf(name, sizeof(name), "base1%s", backup ? "_backup" : "");
+	if (ret < 0)
+		return ret;
+
+	ret = nvmem_cell_read_variable_le_u32(priv->dev, name, &base1);
+	if (ret < 0)
+		return ret;
+
+	ret = snprintf(name, sizeof(name), "base2%s", backup ? "_backup" : "");
+	if (ret < 0)
+		return ret;
+
+	ret = nvmem_cell_read_variable_le_u32(priv->dev, name, &base2);
+	if (ret < 0)
+		return ret;
+
+	for (i = 0; i < priv->num_sensors; i++) {
+		ret = snprintf(name, sizeof(name), "s%d_p1%s", priv->sensor[i].hw_id,
+			       backup ? "_backup" : "");
+		if (ret < 0)
+			return ret;
+
+		ret = nvmem_cell_read_variable_le_u32(priv->dev, name, &p1[i]);
+		if (ret)
+			return ret;
+
+		ret = snprintf(name, sizeof(name), "s%d_p2%s", priv->sensor[i].hw_id,
+			       backup ? "_backup" : "");
+		if (ret < 0)
+			return ret;
+
+		ret = nvmem_cell_read_variable_le_u32(priv->dev, name, &p2[i]);
+		if (ret)
+			return ret;
+	}
+
+	switch (mode) {
+	case ONE_PT_CALIB:
+		for (i = 0; i < priv->num_sensors; i++)
+			p1[i] = p1[i] + (base1 << shift);
+		break;
+	case TWO_PT_CALIB:
+		for (i = 0; i < priv->num_sensors; i++)
+			p2[i] = (p2[i] + base2) << shift;
+		fallthrough;
+	case ONE_PT_CALIB2:
+		for (i = 0; i < priv->num_sensors; i++)
+			p1[i] = (p1[i] + base1) << shift;
+		break;
+	default:
+		dev_dbg(priv->dev, "calibrationless mode\n");
+		for (i = 0; i < priv->num_sensors; i++) {
+			p1[i] = 500;
+			p2[i] = 780;
+		}
+	}
+
+	return mode;
+}
+
+int tsens_calibrate_nvmem(struct tsens_priv *priv, int shift)
+{
+	u32 p1[MAX_SENSORS], p2[MAX_SENSORS];
+	int mode;
+
+	mode = tsens_read_calibration(priv, shift, p1, p2, false);
+	if (mode < 0)
+		return mode;
+
+	compute_intercept_slope(priv, p1, p2, mode);
+
+	return 0;
+}
+
+int tsens_calibrate_common(struct tsens_priv *priv)
+{
+	return tsens_calibrate_nvmem(priv, 2);
+}
+
+static u32 tsens_read_cell(const struct tsens_single_value *cell, u8 len, u32 *data0, u32 *data1)
+{
+	u32 val;
+	u32 *data = cell->blob ? data1 : data0;
+
+	if (cell->shift + len <= 32) {
+		val = data[cell->idx] >> cell->shift;
+	} else {
+		u8 part = 32 - cell->shift;
+
+		val = data[cell->idx] >> cell->shift;
+		val |= data[cell->idx + 1] << part;
+	}
+
+	return val & ((1 << len) - 1);
+}
+
+int tsens_read_calibration_legacy(struct tsens_priv *priv,
+				  const struct tsens_legacy_calibration_format *format,
+				  u32 *p1, u32 *p2,
+				  u32 *cdata0, u32 *cdata1)
+{
+	u32 mode, invalid;
+	u32 base1, base2;
+	int i;
+
+	mode = tsens_read_cell(&format->mode, 2, cdata0, cdata1);
+	invalid = tsens_read_cell(&format->invalid, 1, cdata0, cdata1);
+	if (invalid)
+		mode = NO_PT_CALIB;
+	dev_dbg(priv->dev, "calibration mode is %d\n", mode);
+
+	base1 = tsens_read_cell(&format->base[0], format->base_len, cdata0, cdata1);
+	base2 = tsens_read_cell(&format->base[1], format->base_len, cdata0, cdata1);
+
+	for (i = 0; i < priv->num_sensors; i++) {
+		p1[i] = tsens_read_cell(&format->sp[i][0], format->sp_len, cdata0, cdata1);
+		p2[i] = tsens_read_cell(&format->sp[i][1], format->sp_len, cdata0, cdata1);
+	}
+
+	switch (mode) {
+	case ONE_PT_CALIB:
+		for (i = 0; i < priv->num_sensors; i++)
+			p1[i] = p1[i] + (base1 << format->base_shift);
+		break;
+	case TWO_PT_CALIB:
+		for (i = 0; i < priv->num_sensors; i++)
+			p2[i] = (p2[i] + base2) << format->base_shift;
+		fallthrough;
+	case ONE_PT_CALIB2:
+		for (i = 0; i < priv->num_sensors; i++)
+			p1[i] = (p1[i] + base1) << format->base_shift;
+		break;
+	default:
+		dev_dbg(priv->dev, "calibrationless mode\n");
+		for (i = 0; i < priv->num_sensors; i++) {
+			p1[i] = 500;
+			p2[i] = 780;
+		}
+	}
+
+	return mode;
+}
+
 /*
  * Use this function on devices where slope and offset calculations
  * depend on calibration data read from qfprom. On others the slope
@@ -459,12 +624,9 @@ static irqreturn_t tsens_irq_thread(int irq, void *data)
 {
 	struct tsens_priv *priv = data;
 	struct tsens_irq_data d;
-	bool enable = true, disable = false;
-	unsigned long flags;
-	int temp, ret, i;
+	int i;
 
 	for (i = 0; i < priv->num_sensors; i++) {
-		bool trigger = false;
 		const struct tsens_sensor *s = &priv->sensor[i];
 		u32 hw_id = s->hw_id;
 
@@ -472,52 +634,8 @@ static irqreturn_t tsens_irq_thread(int irq, void *data)
 			continue;
 		if (!tsens_threshold_violated(priv, hw_id, &d))
 			continue;
-		ret = get_temp_tsens_valid(s, &temp);
-		if (ret) {
-			dev_err(priv->dev, "[%u] %s: error reading sensor\n",
-				hw_id, __func__);
-			continue;
-		}
-
-		spin_lock_irqsave(&priv->ul_lock, flags);
-
-		tsens_read_irq_state(priv, hw_id, s, &d);
-
-		if (d.up_viol &&
-		    !masked_irq(hw_id, d.up_irq_mask, tsens_version(priv))) {
-			tsens_set_interrupt(priv, hw_id, UPPER, disable);
-			if (d.up_thresh > temp) {
-				dev_dbg(priv->dev, "[%u] %s: re-arm upper\n",
-					hw_id, __func__);
-				tsens_set_interrupt(priv, hw_id, UPPER, enable);
-			} else {
-				trigger = true;
-				/* Keep irq masked */
-			}
-		} else if (d.low_viol &&
-			   !masked_irq(hw_id, d.low_irq_mask, tsens_version(priv))) {
-			tsens_set_interrupt(priv, hw_id, LOWER, disable);
-			if (d.low_thresh < temp) {
-				dev_dbg(priv->dev, "[%u] %s: re-arm low\n",
-					hw_id, __func__);
-				tsens_set_interrupt(priv, hw_id, LOWER, enable);
-			} else {
-				trigger = true;
-				/* Keep irq masked */
-			}
-		}
 
-		spin_unlock_irqrestore(&priv->ul_lock, flags);
-
-		if (trigger) {
-			dev_dbg(priv->dev, "[%u] %s: TZ update trigger (%d mC)\n",
-				hw_id, __func__, temp);
-			thermal_zone_device_update(s->tzd,
-						   THERMAL_EVENT_UNSPECIFIED);
-		} else {
-			dev_dbg(priv->dev, "[%u] %s: no violation:  %d\n",
-				hw_id, __func__, temp);
-		}
+		thermal_zone_device_update(s->tzd, THERMAL_EVENT_UNSPECIFIED);
 
 		if (tsens_version(priv) < VER_0_1) {
 			/* Constraint: There is only 1 interrupt control register for all
@@ -984,6 +1102,9 @@ static const struct of_device_id tsens_table[] = {
 		.compatible = "qcom,msm8939-tsens",
 		.data = &data_8939,
 	}, {
+		.compatible = "qcom,msm8956-tsens",
+		.data = &data_8956,
+	}, {
 		.compatible = "qcom,msm8960-tsens",
 		.data = &data_8960,
 	}, {