Merge: Update thermal/drivers/qcom for Qdrive3

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/1871

Bugzilla: https://bugzilla.redhat.com/2159524

Bring upstream support and fixes for the thermal subsystem that are relevant
for Qdrive3 (sa8540p-ride).

Signed-off-by: Eric Chanudet <echanude@redhat.com>

Approved-by: Andrew Halaney <ahalaney@redhat.com>
Approved-by: Adrien Thierry <athierry@redhat.com>
Approved-by: Brian Masney <bmasney@redhat.com>
Approved-by: Prarit Bhargava <prarit@redhat.com>

Signed-off-by: Herton R. Krzesinski <herton@redhat.com>

Author: Herton R. Krzesinski

drivers/iio/adc/qcom-vadc-common.c

@@ -677,6 +677,17 @@ u16 qcom_adc_tm5_temp_volt_scale(unsigned int prescale_ratio,
 }
 EXPORT_SYMBOL(qcom_adc_tm5_temp_volt_scale);
 
+u16 qcom_adc_tm5_gen2_temp_res_scale(int temp)
+{
+	int64_t resistance;
+
+	resistance = qcom_vadc_map_temp_voltage(adcmap7_100k,
+		ARRAY_SIZE(adcmap7_100k), temp);
+
+	return div64_s64(resistance * RATIO_MAX_ADC7, resistance + R_PU_100K);
+}
+EXPORT_SYMBOL(qcom_adc_tm5_gen2_temp_res_scale);
+
 int qcom_adc5_hw_scale(enum vadc_scale_fn_type scaletype,
 		    unsigned int prescale_ratio,
 		    const struct adc5_data *data,

drivers/thermal/qcom/tsens-8960.c

@@ -269,9 +269,12 @@ static const struct tsens_ops ops_8960 = {
 static struct tsens_features tsens_8960_feat = {
 	.ver_major	= VER_0,
 	.crit_int	= 0,
+	.combo_int	= 0,
 	.adc		= 1,
 	.srot_split	= 0,
 	.max_sensors	= 11,
+	.trip_min_temp	= -40000,
+	.trip_max_temp	= 120000,
 };
 
 struct tsens_plat_data data_8960 = {

drivers/thermal/qcom/tsens-v0_1.c

@@ -539,9 +539,12 @@ static int calibrate_9607(struct tsens_priv *priv)
 static struct tsens_features tsens_v0_1_feat = {
 	.ver_major	= VER_0_1,
 	.crit_int	= 0,
+	.combo_int	= 0,
 	.adc		= 1,
 	.srot_split	= 1,
 	.max_sensors	= 11,
+	.trip_min_temp	= -40000,
+	.trip_max_temp	= 120000,
 };
 
 static const struct reg_field tsens_v0_1_regfields[MAX_REGFIELDS] = {
@@ -604,7 +607,7 @@ static const struct tsens_ops ops_8939 = {
 struct tsens_plat_data data_8939 = {
 	.num_sensors	= 10,
 	.ops		= &ops_8939,
-	.hw_ids		= (unsigned int []){ 0, 1, 2, 4, 5, 6, 7, 8, 9, 10 },
+	.hw_ids		= (unsigned int []){ 0, 1, 2, 3, 5, 6, 7, 8, 9, 10 },
 
 	.feat		= &tsens_v0_1_feat,
 	.fields	= tsens_v0_1_regfields,

drivers/thermal/qcom/tsens-v1.c

@@ -302,9 +302,12 @@ static int calibrate_8976(struct tsens_priv *priv)
 static struct tsens_features tsens_v1_feat = {
 	.ver_major	= VER_1_X,
 	.crit_int	= 0,
+	.combo_int	= 0,
 	.adc		= 1,
 	.srot_split	= 1,
 	.max_sensors	= 11,
+	.trip_min_temp	= -40000,
+	.trip_max_temp	= 120000,
 };
 
 static const struct reg_field tsens_v1_regfields[MAX_REGFIELDS] = {

drivers/thermal/qcom/tsens-v2.c

@@ -31,9 +31,12 @@
 static struct tsens_features tsens_v2_feat = {
 	.ver_major	= VER_2_X,
 	.crit_int	= 1,
+	.combo_int	= 0,
 	.adc		= 0,
 	.srot_split	= 1,
 	.max_sensors	= 16,
+	.trip_min_temp	= -40000,
+	.trip_max_temp	= 120000,
 };
 
 static const struct reg_field tsens_v2_regfields[MAX_REGFIELDS] = {

drivers/thermal/qcom/tsens.c

@@ -18,6 +18,7 @@
 #include <linux/regmap.h>
 #include <linux/slab.h>
 #include <linux/thermal.h>
+#include "../thermal_hwmon.h"
 #include "tsens.h"
 
 /**
@@ -417,7 +418,7 @@ static irqreturn_t tsens_critical_irq_thread(int irq, void *data)
 		const struct tsens_sensor *s = &priv->sensor[i];
 		u32 hw_id = s->hw_id;
 
-		if (IS_ERR(s->tzd))
+		if (!s->tzd)
 			continue;
 		if (!tsens_threshold_violated(priv, hw_id, &d))
 			continue;
@@ -467,7 +468,7 @@ static irqreturn_t tsens_irq_thread(int irq, void *data)
 		const struct tsens_sensor *s = &priv->sensor[i];
 		u32 hw_id = s->hw_id;
 
-		if (IS_ERR(s->tzd))
+		if (!s->tzd)
 			continue;
 		if (!tsens_threshold_violated(priv, hw_id, &d))
 			continue;
@@ -531,6 +532,27 @@ static irqreturn_t tsens_irq_thread(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
+/**
+ * tsens_combined_irq_thread() - Threaded interrupt handler for combined interrupts
+ * @irq: irq number
+ * @data: tsens controller private data
+ *
+ * Handle the combined interrupt as if it were 2 separate interrupts, so call the
+ * critical handler first and then the up/low one.
+ *
+ * Return: IRQ_HANDLED
+ */
+static irqreturn_t tsens_combined_irq_thread(int irq, void *data)
+{
+	irqreturn_t ret;
+
+	ret = tsens_critical_irq_thread(irq, data);
+	if (ret != IRQ_HANDLED)
+		return ret;
+
+	return tsens_irq_thread(irq, data);
+}
+
 static int tsens_set_trips(void *_sensor, int low, int high)
 {
 	struct tsens_sensor *s = _sensor;
@@ -551,8 +573,8 @@ static int tsens_set_trips(void *_sensor, int low, int high)
 	dev_dbg(dev, "[%u] %s: proposed thresholds: (%d:%d)\n",
 		hw_id, __func__, low, high);
 
-	cl_high = clamp_val(high, -40000, 120000);
-	cl_low  = clamp_val(low, -40000, 120000);
+	cl_high = clamp_val(high, priv->feat->trip_min_temp, priv->feat->trip_max_temp);
+	cl_low  = clamp_val(low, priv->feat->trip_min_temp, priv->feat->trip_max_temp);
 
 	high_val = tsens_mC_to_hw(s, cl_high);
 	low_val  = tsens_mC_to_hw(s, cl_low);
@@ -603,22 +625,21 @@ int get_temp_tsens_valid(const struct tsens_sensor *s, int *temp)
 	int ret;
 
 	/* VER_0 doesn't have VALID bit */
-	if (tsens_version(priv) >= VER_0_1) {
-		ret = regmap_field_read(priv->rf[valid_idx], &valid);
-		if (ret)
-			return ret;
-		while (!valid) {
-			/* Valid bit is 0 for 6 AHB clock cycles.
-			 * At 19.2MHz, 1 AHB clock is ~60ns.
-			 * We should enter this loop very, very rarely.
-			 */
-			ndelay(400);
-			ret = regmap_field_read(priv->rf[valid_idx], &valid);
-			if (ret)
-				return ret;
-		}
-	}
+	if (tsens_version(priv) == VER_0)
+		goto get_temp;
 
+	/* Valid bit is 0 for 6 AHB clock cycles.
+	 * At 19.2MHz, 1 AHB clock is ~60ns.
+	 * We should enter this loop very, very rarely.
+	 * Wait 1 us since it's the min of poll_timeout macro.
+	 * Old value was 400 ns.
+	 */
+	ret = regmap_field_read_poll_timeout(priv->rf[valid_idx], valid,
+					     valid, 1, 20 * USEC_PER_MSEC);
+	if (ret)
+		return ret;
+
+get_temp:
 	/* Valid bit is set, OK to read the temperature */
 	*temp = tsens_hw_to_mC(s, temp_idx);
 
@@ -692,7 +713,7 @@ static int dbg_version_show(struct seq_file *s, void *data)
 			return ret;
 		seq_printf(s, "%d.%d.%d\n", maj_ver, min_ver, step_ver);
 	} else {
-		seq_puts(s, "0.1.0\n");
+		seq_printf(s, "0.%d.0\n", priv->feat->ver_major);
 	}
 
 	return 0;
@@ -704,21 +725,14 @@ DEFINE_SHOW_ATTRIBUTE(dbg_sensors);
 static void tsens_debug_init(struct platform_device *pdev)
 {
 	struct tsens_priv *priv = platform_get_drvdata(pdev);
-	struct dentry *root, *file;
 
-	root = debugfs_lookup("tsens", NULL);
-	if (!root)
+	priv->debug_root = debugfs_lookup("tsens", NULL);
+	if (!priv->debug_root)
 		priv->debug_root = debugfs_create_dir("tsens", NULL);
-	else
-		priv->debug_root = root;
-
-	file = debugfs_lookup("version", priv->debug_root);
-	if (!file)
-		debugfs_create_file("version", 0444, priv->debug_root,
-				    pdev, &dbg_version_fops);
 
 	/* A directory for each instance of the TSENS IP */
 	priv->debug = debugfs_create_dir(dev_name(&pdev->dev), priv->debug_root);
+	debugfs_create_file("version", 0444, priv->debug, pdev, &dbg_version_fops);
 	debugfs_create_file("sensors", 0444, priv->debug, pdev, &dbg_sensors_fops);
 }
 #else
@@ -918,8 +932,6 @@ int __init init_common(struct tsens_priv *priv)
 	if (tsens_version(priv) >= VER_0_1)
 		tsens_enable_irq(priv);
 
-	tsens_debug_init(op);
-
 err_put_device:
 	put_device(&op->dev);
 	return ret;
@@ -933,17 +945,6 @@ static int tsens_get_temp(void *data, int *temp)
 	return priv->ops->get_temp(s, temp);
 }
 
-static int tsens_get_trend(void *data, int trip, enum thermal_trend *trend)
-{
-	struct tsens_sensor *s = data;
-	struct tsens_priv *priv = s->priv;
-
-	if (priv->ops->get_trend)
-		return priv->ops->get_trend(s, trend);
-
-	return -ENOTSUPP;
-}
-
 static int  __maybe_unused tsens_suspend(struct device *dev)
 {
 	struct tsens_priv *priv = dev_get_drvdata(dev);
@@ -1001,7 +1002,6 @@ MODULE_DEVICE_TABLE(of, tsens_table);
 
 static const struct thermal_zone_of_device_ops tsens_of_ops = {
 	.get_temp = tsens_get_temp,
-	.get_trend = tsens_get_trend,
 	.set_trips = tsens_set_trips,
 };
 
@@ -1061,6 +1061,10 @@ static int tsens_register(struct tsens_priv *priv)
 		priv->sensor[i].tzd = tzd;
 		if (priv->ops->enable)
 			priv->ops->enable(priv, i);
+
+		if (devm_thermal_add_hwmon_sysfs(tzd))
+			dev_warn(priv->dev,
+				 "Failed to add hwmon sysfs attributes\n");
 	}
 
 	/* VER_0 require to set MIN and MAX THRESH
@@ -1076,13 +1080,18 @@ static int tsens_register(struct tsens_priv *priv)
 				   tsens_mC_to_hw(priv->sensor, 0));
 	}
 
-	ret = tsens_register_irq(priv, "uplow", tsens_irq_thread);
-	if (ret < 0)
-		return ret;
+	if (priv->feat->combo_int) {
+		ret = tsens_register_irq(priv, "combined",
+					 tsens_combined_irq_thread);
+	} else {
+		ret = tsens_register_irq(priv, "uplow", tsens_irq_thread);
+		if (ret < 0)
+			return ret;
 
-	if (priv->feat->crit_int)
-		ret = tsens_register_irq(priv, "critical",
-					 tsens_critical_irq_thread);
+		if (priv->feat->crit_int)
+			ret = tsens_register_irq(priv, "critical",
+						 tsens_critical_irq_thread);
+	}
 
 	return ret;
 }
@@ -1158,7 +1167,11 @@ static int tsens_probe(struct platform_device *pdev)
 		}
 	}
 
-	return tsens_register(priv);
+	ret = tsens_register(priv);
+	if (!ret)
+		tsens_debug_init(pdev);
+
+	return ret;
 }
 
 static int tsens_remove(struct platform_device *pdev)

drivers/thermal/qcom/tsens.h

@@ -65,7 +65,6 @@ struct tsens_sensor {
  * @disable: Function to disable the tsens device
  * @suspend: Function to suspend the tsens device
  * @resume: Function to resume the tsens device
- * @get_trend: Function to get the thermal/temp trend
  */
 struct tsens_ops {
 	/* mandatory callbacks */
@@ -77,7 +76,6 @@ struct tsens_ops {
 	void (*disable)(struct tsens_priv *priv);
 	int (*suspend)(struct tsens_priv *priv);
 	int (*resume)(struct tsens_priv *priv);
-	int (*get_trend)(struct tsens_sensor *s, enum thermal_trend *trend);
 };
 
 #define REG_FIELD_FOR_EACH_SENSOR11(_name, _offset, _startbit, _stopbit) \
@@ -495,19 +493,25 @@ enum regfield_ids {
  * struct tsens_features - Features supported by the IP
  * @ver_major: Major number of IP version
  * @crit_int: does the IP support critical interrupts?
+ * @combo_int: does the IP use one IRQ for up, low and critical thresholds?
  * @adc:      do the sensors only output adc code (instead of temperature)?
  * @srot_split: does the IP neatly splits the register space into SROT and TM,
  *              with SROT only being available to secure boot firmware?
  * @has_watchdog: does this IP support watchdog functionality?
  * @max_sensors: maximum sensors supported by this version of the IP
+ * @trip_min_temp: minimum trip temperature supported by this version of the IP
+ * @trip_max_temp: maximum trip temperature supported by this version of the IP
  */
 struct tsens_features {
 	unsigned int ver_major;
 	unsigned int crit_int:1;
+	unsigned int combo_int:1;
 	unsigned int adc:1;
 	unsigned int srot_split:1;
 	unsigned int has_watchdog:1;
 	unsigned int max_sensors;
+	int trip_min_temp;
+	int trip_max_temp;
 };
 
 /**

include/linux/iio/adc/qcom-vadc-common.h

@@ -152,6 +152,8 @@ int qcom_adc5_hw_scale(enum vadc_scale_fn_type scaletype,
 u16 qcom_adc_tm5_temp_volt_scale(unsigned int prescale_ratio,
 				 u32 full_scale_code_volt, int temp);
 
+u16 qcom_adc_tm5_gen2_temp_res_scale(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);