Add zeroc interrupt support to tsens driver

TSENS IP v2.6+ adds zeroc interrupt support. It triggers set

interrupt when aggregated minimum temperature of all TSENS falls below zeroc preset threshold and triggers reset interrupt when

aggregated minimum temperature of all TSENS crosses above reset threshold. Add support for this interrupt in the driver.

It adds another sensor to the of-thermal along with all individual TSENS. It enables to add any mitigation for zeroc interrupt.

Signed-off-by Manaf Meethalavalappu Pallikunhi <[email protected]>

---
 drivers/thermal/qcom/tsens-v2.c |   5 ++
 drivers/thermal/qcom/tsens.c    | 107 +++++++++++++++++++++++++++++++-
 drivers/thermal/qcom/tsens.h    |  10 +++
 3 files changed, 120 insertions(+), 2 deletions(-)

drivers/thermal/qcom/tsens-v2.c +5 -0

index b293ed32174b..8f30b859ab22 100644
@@ -23,6 +23,7 @@
 #define TM_Sn_UPPER_LOWER_THRESHOLD_OFF 0x0020
 #define TM_Sn_CRITICAL_THRESHOLD_OFF   0x0060
 #define TM_Sn_STATUS_OFF               0x00a0
+#define TM_ZEROC_INT_STATUS_OFF                0x00e0
 #define TM_TRDY_OFF                    0x00e4
 #define TM_WDOG_LOG_OFF                0x013c
 

@@ -86,6 +87,9 @@ static const struct reg_field tsens_v2_regfields[MAX_REGFIELDS] = {
        REG_FIELD_FOR_EACH_SENSOR16(CRITICAL_STATUS, TM_Sn_STATUS_OFF, 19,  19),
        REG_FIELD_FOR_EACH_SENSOR16(MAX_STATUS,      TM_Sn_STATUS_OFF, 20,  20),
 
+       /* ZEROC INTERRUPT STATUS */
+       [ZEROC_STATUS] = REG_FIELD(TM_ZEROC_INT_STATUS_OFF, 0, 0),
+
        /* TRDY: 1=ready, 0=in progress */
        [TRDY] = REG_FIELD(TM_TRDY_OFF, 0, 0),
 };

@@ -93,6 +97,7 @@ static const struct reg_field tsens_v2_regfields[MAX_REGFIELDS] = {
 static const struct tsens_ops ops_generic_v2 = {
        .init           = init_common,
        .get_temp       = get_temp_tsens_valid,
+       .get_zeroc_status  = get_tsens_zeroc_status,
 };
 
 struct tsens_plat_data data_tsens_v2 = {

drivers/thermal/qcom/tsens.c +18 -1

index 8d3e94d2a9ed..dd0172f05eb6 100644
@@ -205,7 +205,8 @@ static void tsens_set_interrupt_v1(struct tsens_priv *priv, u32 hw_id,
                index = LOW_INT_CLEAR_0 + hw_id;
                break;
        case CRITICAL:
-               /* No critical interrupts before v2 */
+       case ZEROC:
+               /* No critical and zeroc interrupts before v2 */
                return;
        }
        regmap_field_write(priv->rf[index], enable ? 0 : 1);

@@ -236,6 +237,9 @@ static void tsens_set_interrupt_v2(struct tsens_priv *priv, u32 hw_id,
                index_mask  = CRIT_INT_MASK_0 + hw_id;
                index_clear = CRIT_INT_CLEAR_0 + hw_id;
                break;
+       case ZEROC:
+               /* Nothing to handle for zeroc interrupt */
+               return;
        }
 
        if (enable) {

@@ -367,6 +371,35 @@ static inline u32 masked_irq(u32 hw_id, u32 mask, enum tsens_ver ver)
        return 0;
 }
 
+/**
+ * tsens_zeroc_irq_thread - Threaded interrupt handler for zeroc interrupt
+ * @irq: irq number
+ * @data: tsens controller private data
+ *
+ * Whenever interrupt triggers notify thermal framework using
+ * thermal_zone_device_update().
+ *
+ * Return: IRQ_HANDLED
+ */
+
+irqreturn_t tsens_zeroc_irq_thread(int irq, void *data)
+{

drivers/thermal/qcom/tsens.c +6 -0

+
+       thermal_zone_device_update(s->tzd, THERMAL_EVENT_UNSPECIFIED);
+
+       return IRQ_HANDLED;
+}
+
 /**
  * tsens_critical_irq_thread() - Threaded handler for critical interrupts
  * @irq: irq number

@@ -575,6 +608,20 @@ void tsens_disable_irq(struct tsens_priv *priv)
        regmap_field_write(priv->rf[INT_EN], 0);
 }
 

drivers/thermal/qcom/tsens.c +17 -0

+
+       return 0;
+}
+
 int get_temp_tsens_valid(const struct tsens_sensor *s, int *temp)
 {
        struct tsens_priv *priv = s->priv;

@@ -843,6 +890,19 @@ int __init init_common(struct tsens_priv *priv)
                regmap_field_write(priv->rf[CC_MON_MASK], 1);
        }
 
+       if (tsens_version(priv) > VER_1_X &&  ver_minor > 5) {
+               /* ZEROC interrupt is present only on v2.6+ */
+               priv->feat->zeroc_int = 1;
+               priv->rf[ZEROC_STATUS] = devm_regmap_field_alloc(
+                                               dev,
+                                               priv->tm_map,
+                                               priv->fields[ZEROC_STATUS]);
+               if (IS_ERR(priv->rf[ZEROC_STATUS])) {
+                       ret = PTR_ERR(priv->rf[ZEROC_STATUS]);
+                       goto err_put_device;
+               }
+       }
+
        spin_lock_init(&priv->ul_lock);
        tsens_enable_irq(priv);
        tsens_debug_init(op);

drivers/thermal/qcom/tsens.c +30 -0

+{
+       struct tsens_sensor *s = data;
+       struct tsens_priv *priv = s->priv;
+
+       if (priv->ops->get_zeroc_status)
+               return priv->ops->get_zeroc_status(s, temp);
+
+       return -ENOTSUPP;
+}
+
 static int tsens_get_temp(void *data, int *temp)
 {
        struct tsens_sensor *s = data;

@@ -923,6 +994,10 @@ static const struct thermal_zone_of_device_ops tsens_of_ops = {
        .set_trips = tsens_set_trips,
 };
 
+static const struct thermal_zone_of_device_ops tsens_zeroc_of_ops = {
+       .get_temp = tsens_zeroc_get_temp,
+};
+
 static int tsens_register_irq(struct tsens_priv *priv, char *irqname,
                              irq_handler_t thread_fn)
 {

@@ -980,6 +1055,21 @@ static int tsens_register(struct tsens_priv *priv)
                ret = tsens_register_irq(priv, "critical",
                                         tsens_critical_irq_thread);
 
+       if (priv->feat->zeroc_int && priv->zeroc_en) {
+               priv->sensor[priv->num_sensors].priv = priv;
+               tzd = devm_thermal_zone_of_sensor_register(priv->dev,
+                                       priv->sensor[priv->num_sensors].hw_id,
+                                       &priv->sensor[priv->num_sensors],
+                                       &tsens_zeroc_of_ops);
+               if (IS_ERR(tzd)) {
+                       ret = 0;
+                       return ret;
+               }
+
+               priv->sensor[priv->num_sensors].tzd = tzd;
+               ret = tsens_register_irq(priv, "zeroc", tsens_zeroc_irq_thread);
+       }
+
        return ret;
 }
 

@@ -992,6 +1082,7 @@ static int tsens_probe(struct platform_device *pdev)
        const struct tsens_plat_data *data;
        const struct of_device_id *id;
        u32 num_sensors;
+       bool zeroc_en = false;
 
        if (pdev->dev.of_node)
                dev = &pdev->dev;

drivers/thermal/qcom/tsens.c +1 -1

                             GFP_KERNEL);

@@ -1023,7 +1120,7 @@ static int tsens_probe(struct platform_device *pdev)
                return -ENOMEM;
 
        priv->dev = dev;
-       priv->num_sensors = num_sensors;
+       priv->num_sensors = zeroc_en ? num_sensors - 1 : num_sensors;
        priv->ops = data->ops;
        for (i = 0;  i < priv->num_sensors; i++) {
                if (data->hw_ids)

drivers/thermal/qcom/tsens.c +2 -0

+       }
+
        priv->feat = data->feat;
        priv->fields = data->fields;
 

drivers/thermal/qcom/tsens.h +2 -0

index 59d01162c66a..34d24332b320 100644
@@ -34,6 +34,7 @@ enum tsens_irq_type {
        LOWER,
        UPPER,
        CRITICAL,
+       ZEROC,
 };
 
 /**

@@ -64,6 +65,7 @@ struct tsens_sensor {
  * @suspend: Function to suspend the tsens device
  * @resume: Function to resume the tsens device
  * @get_trend: Function to get the thermal/temp trend
+ * @get_zeroc_status: Function to get the zeroc interrupt status
  */
 struct tsens_ops {
        /* mandatory callbacks */

drivers/thermal/qcom/tsens.h +6 -1

+
        /* Keep last */
        MAX_REGFIELDS
 };

@@ -497,6 +502,7 @@ enum regfield_ids {
  * @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?
+ * @zeroc_int: does this IP support ZEROC interrupt ?
  * @max_sensors: maximum sensors supported by this version of the IP
  */
 struct tsens_features {

@@ -505,6 +511,7 @@ struct tsens_features {
        unsigned int adc:1;
        unsigned int srot_split:1;
        unsigned int has_watchdog:1;
+       unsigned int zeroc_int:1;
        unsigned int max_sensors;
 };
 

@@ -549,6 +556,7 @@ struct tsens_context {
  * @feat: features of the IP
  * @fields: bitfield locations
  * @ops: pointer to list of callbacks supported by this device
+ * @zeroc_en: variable to check zeroc interrupt sensor is enabled or not
  * @debug_root: pointer to debugfs dentry for all tsens
  * @debug: pointer to debugfs dentry for tsens controller
  * @sensor: list of sensors attached to this device

@@ -568,6 +576,7 @@ struct tsens_priv {
        struct tsens_features           *feat;
        const struct reg_field          *fields;
        const struct tsens_ops          *ops;
+       bool                            zeroc_en;
 
        struct dentry                   *debug_root;
        struct dentry                   *debug;

@@ -580,6 +589,7 @@ void compute_intercept_slope(struct tsens_priv *priv, u32 *pt1, u32 *pt2, u32 mo
 int init_common(struct tsens_priv *priv);
 int get_temp_tsens_valid(const struct tsens_sensor *s, int *temp);
 int get_temp_common(const struct tsens_sensor *s, int *temp);
+int get_tsens_zeroc_status(const struct tsens_sensor *s, int *temp);
 
 /* TSENS target */
 extern struct tsens_plat_data data_8960;
--

2.26.2

Quoted 2 lines · Manaf Meethalavalappu Pallikunhi

TSENS IP v2.6+ adds zeroc interrupt support. It triggers set

As I re-read through these patches, shouldn't we just call it the "cold" interrupt?

Quoted 3 lines

interrupt when aggregated minimum temperature of all TSENS falls below zeroc preset threshold and triggers reset interrupt when

Again, cold would just capture the intent much better given that it doesn't even triggered at zero but at 5 degrees. And this value could change in firmware.

Quoted 99 lines

aggregated minimum temperature of all TSENS crosses above reset threshold. Add support for this interrupt in the driver.

It adds another sensor to the of-thermal along with all individual TSENS. It enables to add any mitigation for zeroc interrupt.

Signed-off-by Manaf Meethalavalappu Pallikunhi <[email protected]>

---
 drivers/thermal/qcom/tsens-v2.c |   5 ++
 drivers/thermal/qcom/tsens.c    | 107 
+++++++++++++++++++++++++++++++-
 drivers/thermal/qcom/tsens.h    |  10 +++
 3 files changed, 120 insertions(+), 2 deletions(-)

drivers/thermal/qcom/tsens-v2.c +4 -0

index b293ed32174b..8f30b859ab22 100644
@@ -23,6 +23,7 @@
 #define TM_Sn_UPPER_LOWER_THRESHOLD_OFF 0x0020
 #define TM_Sn_CRITICAL_THRESHOLD_OFF   0x0060
 #define TM_Sn_STATUS_OFF               0x00a0
+#define TM_ZEROC_INT_STATUS_OFF                0x00e0
 #define TM_TRDY_OFF                    0x00e4
 #define TM_WDOG_LOG_OFF                0x013c
 

@@ -86,6 +87,9 @@ static const struct reg_field 
 tsens_v2_regfields[MAX_REGFIELDS] = {
        REG_FIELD_FOR_EACH_SENSOR16(CRITICAL_STATUS, TM_Sn_STATUS_OFF, 
 19,  19),
        REG_FIELD_FOR_EACH_SENSOR16(MAX_STATUS,      TM_Sn_STATUS_OFF, 
 20,  20),
 
+       /* ZEROC INTERRUPT STATUS */
+       [ZEROC_STATUS] = REG_FIELD(TM_ZEROC_INT_STATUS_OFF, 0, 0),
+

        /* TRDY: 1=ready, 0=in progress */
        [TRDY] = REG_FIELD(TM_TRDY_OFF, 0, 0),

};

drivers/thermal/qcom/tsens-v2.c +1 -0

@@ -93,6 +97,7 @@ static const struct reg_field 
 tsens_v2_regfields[MAX_REGFIELDS] = {
 static const struct tsens_ops ops_generic_v2 = {
        .init           = init_common,
        .get_temp       = get_temp_tsens_valid,
+       .get_zeroc_status  = get_tsens_zeroc_status,
 };
 

struct tsens_plat_data data_tsens_v2 = {

drivers/thermal/qcom/tsens.c +2 -1

index 8d3e94d2a9ed..dd0172f05eb6 100644
@@ -205,7 +205,8 @@ static void tsens_set_interrupt_v1(struct 
 tsens_priv *priv, u32 hw_id,
                index = LOW_INT_CLEAR_0 + hw_id;
                break;
        case CRITICAL:
-               /* No critical interrupts before v2 */
+       case ZEROC:
+               /* No critical and zeroc interrupts before v2 */
                return;
        }

        regmap_field_write(priv->rf[index], enable ? 0 : 1);

drivers/thermal/qcom/tsens.c +3 -0

@@ -236,6 +237,9 @@ static void tsens_set_interrupt_v2(struct 
 tsens_priv *priv, u32 hw_id,
                index_mask  = CRIT_INT_MASK_0 + hw_id;
                index_clear = CRIT_INT_CLEAR_0 + hw_id;
                break;
+       case ZEROC:
+               /* Nothing to handle for zeroc interrupt */
+               return;
        }
 

        if (enable) {

drivers/thermal/qcom/tsens.c +2 -0

@@ -367,6 +371,35 @@ static inline u32 masked_irq(u32 hw_id, u32 mask, 
 enum tsens_ver ver)
        return 0;
 }
 
+/**
+ * tsens_zeroc_irq_thread - Threaded interrupt handler for zeroc 

interrupt
+ * @irq: irq number
+ * @data: tsens controller private data
+ *
+ * Whenever interrupt triggers notify thermal framework using
+ * thermal_zone_device_update().
+ *
+ * Return: IRQ_HANDLED
+ */

drivers/thermal/qcom/tsens.c +9 -0

+
+irqreturn_t tsens_zeroc_irq_thread(int irq, void *data)
+{
+       struct tsens_priv *priv = data;
+       struct tsens_sensor *s = &priv->sensor[priv->num_sensors];
+       int temp, ret;
+
+       ret = regmap_field_read(priv->rf[ZEROC_STATUS], &temp);
+       if (ret)

drivers/thermal/qcom/tsens.c static inline u32 masked_irq(u32 hw_id, u32 mask, enum tsens_ver ver) · line 396

Quoted 4 lines

drivers/thermal/qcom/tsens.c +4 -0

+               return ret;
+
+       dev_dbg(priv->dev, "[%u] %s: zeroc interrupt is %s\n",
+               s->hw_id, __func__, temp ? "triggered" : "cleared");

Rename temp to cold or something similar since you're not really returning temperature but a boolean state on whether we're in cold zone or not.

Quoted 15 lines

drivers/thermal/qcom/tsens.c +6 -0

+
+       thermal_zone_device_update(s->tzd, THERMAL_EVENT_UNSPECIFIED);
+
+       return IRQ_HANDLED;
+}
+
 /**
  * tsens_critical_irq_thread() - Threaded handler for critical 

interrupts
* @irq: irq number

drivers/thermal/qcom/tsens.c +0 -0

@@ -575,6 +608,20 @@ void tsens_disable_irq(struct tsens_priv *priv)
        regmap_field_write(priv->rf[INT_EN], 0);
 }
 

drivers/thermal/qcom/tsens.c void tsens_disable_irq(struct tsens_priv *priv) · line 620

Quoted 10 lines

drivers/thermal/qcom/tsens.c +10 -0

+int get_tsens_zeroc_status(const struct tsens_sensor *s, int *temp)
+{
+       struct tsens_priv *priv = s->priv;
+       int last_temp = 0, ret;
+
+       ret = regmap_field_read(priv->rf[ZEROC_STATUS], &last_temp);
+       if (ret)
+               return ret;
+
+       *temp = last_temp;

same here. Don't use temp and last_temp. Use cold and prev_cold, for example.

Quoted 33 lines

drivers/thermal/qcom/tsens.c +17 -0

+
+       return 0;
+}
+
 int get_temp_tsens_valid(const struct tsens_sensor *s, int *temp)
 {
        struct tsens_priv *priv = s->priv;

@@ -843,6 +890,19 @@ int __init init_common(struct tsens_priv *priv)
                regmap_field_write(priv->rf[CC_MON_MASK], 1);
        }
 
+       if (tsens_version(priv) > VER_1_X &&  ver_minor > 5) {
+               /* ZEROC interrupt is present only on v2.6+ */
+               priv->feat->zeroc_int = 1;
+               priv->rf[ZEROC_STATUS] = devm_regmap_field_alloc(
+                                               dev,
+                                               priv->tm_map,
+                                               
 priv->fields[ZEROC_STATUS]);
+               if (IS_ERR(priv->rf[ZEROC_STATUS])) {
+                       ret = PTR_ERR(priv->rf[ZEROC_STATUS]);
+                       goto err_put_device;
+               }
+       }
+
        spin_lock_init(&priv->ul_lock);
        tsens_enable_irq(priv);

        tsens_debug_init(op);

drivers/thermal/qcom/tsens.c +0 -0

@@ -852,6 +912,17 @@ int __init init_common(struct tsens_priv *priv)
        return ret;
 }
 

drivers/thermal/qcom/tsens.c int __init init_common(struct tsens_priv *priv) · line 915

Quoted 1 line

drivers/thermal/qcom/tsens.c +1 -0

+static int tsens_zeroc_get_temp(void *data, int *temp)

Add kernel doc to this function since it doesn't return temperature, but a cold state, 0 or 1, on success.

One question: You need to poll this value from userspace, right? For the userspace interface being discussed on the list currently, you would still not get automatic notifications for this interrupt unless you plan to add trip points that will cause thermal core to trigger userspace events.

Quoted 66 lines

drivers/thermal/qcom/tsens.c +14 -0

+{
+       struct tsens_sensor *s = data;
+       struct tsens_priv *priv = s->priv;
+
+       if (priv->ops->get_zeroc_status)
+               return priv->ops->get_zeroc_status(s, temp);
+
+       return -ENOTSUPP;
+}
+
 static int tsens_get_temp(void *data, int *temp)
 {
        struct tsens_sensor *s = data;

@@ -923,6 +994,10 @@ static const struct thermal_zone_of_device_ops 
 tsens_of_ops = {
        .set_trips = tsens_set_trips,
 };
 
+static const struct thermal_zone_of_device_ops tsens_zeroc_of_ops = {
+       .get_temp = tsens_zeroc_get_temp,
+};
+
 static int tsens_register_irq(struct tsens_priv *priv, char *irqname,
                              irq_handler_t thread_fn)

{

drivers/thermal/qcom/tsens.c +13 -0

@@ -980,6 +1055,21 @@ static int tsens_register(struct tsens_priv 
 *priv)
                ret = tsens_register_irq(priv, "critical",
                                         tsens_critical_irq_thread);
 
+       if (priv->feat->zeroc_int && priv->zeroc_en) {
+               priv->sensor[priv->num_sensors].priv = priv;
+               tzd = devm_thermal_zone_of_sensor_register(priv->dev,
+                                       
 priv->sensor[priv->num_sensors].hw_id,
+                                       
 &priv->sensor[priv->num_sensors],
+                                       &tsens_zeroc_of_ops);
+               if (IS_ERR(tzd)) {
+                       ret = 0;
+                       return ret;
+               }
+
+               priv->sensor[priv->num_sensors].tzd = tzd;
+               ret = tsens_register_irq(priv, "zeroc", 

tsens_zeroc_irq_thread);

drivers/thermal/qcom/tsens.c +3 -0

+       }
+
        return ret;
 }

@@ -992,6 +1082,7 @@ static int tsens_probe(struct platform_device 
 *pdev)
        const struct tsens_plat_data *data;
        const struct of_device_id *id;
        u32 num_sensors;
+       bool zeroc_en = false;
 
        if (pdev->dev.of_node)

                dev = &pdev->dev;

drivers/thermal/qcom/tsens.c +0 -0

@@ -1016,6 +1107,12 @@ static int tsens_probe(struct platform_device 
 *pdev)
                return -EINVAL;
        }
 

drivers/thermal/qcom/tsens.c static int tsens_probe(struct platform_device *pdev) · line 1112

Quoted 3 lines

drivers/thermal/qcom/tsens.c +3 -0

+       /* Check whether zeroc interrupt is enabled or not */
+       if (platform_get_irq_byname(pdev, "zeroc") > 0) {
+               zeroc_en = true;

This check can be done in tsens_register_irq() from tsens_register. It is OK to have an extra struct tsens_sensor allocated even on platforms that don't have it.

drivers/thermal/qcom/tsens.c static int tsens_probe(struct platform_device *pdev) · line 1117

Quoted 6 lines

drivers/thermal/qcom/tsens.c +3 -0

+               num_sensors++;
+       }
+
        priv = devm_kzalloc(dev,
                             struct_size(priv, sensor, num_sensors),

make this num_sensors + 1 to account for the zeroc virtual sensor. See below.

Quoted 13 lines

                             GFP_KERNEL);

drivers/thermal/qcom/tsens.c +1 -1

@@ -1023,7 +1120,7 @@ static int tsens_probe(struct platform_device 
 *pdev)
                return -ENOMEM;
 
        priv->dev = dev;
-       priv->num_sensors = num_sensors;
+       priv->num_sensors = zeroc_en ? num_sensors - 1 : num_sensors;
        priv->ops = data->ops;
        for (i = 0;  i < priv->num_sensors; i++) {

                if (data->hw_ids)

drivers/thermal/qcom/tsens.c static int tsens_probe(struct platform_device · line 1136

Quoted 9 lines

drivers/thermal/qcom/tsens.c +4 -0

@@ -1031,6 +1128,12 @@ static int tsens_probe(struct platform_device 
 *pdev)
                else
                        priv->sensor[i].hw_id = i;
        }
+
+       if (zeroc_en) {
+               priv->zeroc_en = zeroc_en;
+               priv->sensor[num_sensors].hw_id = 
 data->feat->max_sensors;

This is going to break as soon as we have a platform that actually uses all 16 sensors. i.e. you won't have a spare one to use if num_sensors >= max_sensors.

I think you should introduce a new member 'struct tsens_sensor zeroc_sensor' in tsens_priv and avoid playing with num_sensors completely.

Quoted 28 lines

drivers/thermal/qcom/tsens.c +2 -0

+       }
+
        priv->feat = data->feat;

        priv->fields = data->fields;

drivers/thermal/qcom/tsens.h +2 -0

index 59d01162c66a..34d24332b320 100644
@@ -34,6 +34,7 @@ enum tsens_irq_type {
        LOWER,
        UPPER,
        CRITICAL,
+       ZEROC,
 };
 
 /**

@@ -64,6 +65,7 @@ struct tsens_sensor {
  * @suspend: Function to suspend the tsens device
  * @resume: Function to resume the tsens device
  * @get_trend: Function to get the thermal/temp trend
+ * @get_zeroc_status: Function to get the zeroc interrupt status
  */
 struct tsens_ops {
        /* mandatory callbacks */

@@ -76,6 +78,7 @@ struct tsens_ops {
        int (*suspend)(struct tsens_priv *priv);

drivers/thermal/qcom/tsens.h struct tsens_ops { · line 83

Quoted 5 lines

drivers/thermal/qcom/tsens.h +1 -0

        int (*resume)(struct tsens_priv *priv);
        int (*get_trend)(struct tsens_sensor *s, enum thermal_trend 
 *trend);
+       int (*get_zeroc_status)(const struct tsens_sensor *s, int 
 *temp);

this fn doesn't return temp, but a boolean status of whether we're in cold zone or not. Replace 'int *temp' with 'boolean *zeroc'?

Quoted 9 lines

drivers/thermal/qcom/tsens.h +0 -0

 };

#define REG_FIELD_FOR_EACH_SENSOR11(_name, _offset, _startbit,
_stopbit) \

drivers/thermal/qcom/tsens.h +0 -0

@@ -485,6 +488,8 @@ enum regfield_ids {
        MAX_STATUS_14,
        MAX_STATUS_15,
 

drivers/thermal/qcom/tsens.h enum regfield_ids { · line 491

Quoted 1 line

drivers/thermal/qcom/tsens.h +1 -0

+       ZEROC_STATUS,   /* ZEROC INTERRUPT status */

Indent comment at same level as others above it

Quoted 52 lines

drivers/thermal/qcom/tsens.h +1 -0

+
        /* Keep last */
        MAX_REGFIELDS
 };

@@ -497,6 +502,7 @@ enum regfield_ids {
  * @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?
+ * @zeroc_int: does this IP support ZEROC interrupt ?
* @max_sensors: maximum sensors supported by this version of the IP */
struct tsens_features {

drivers/thermal/qcom/tsens.h +2 -0

@@ -505,6 +511,7 @@ struct tsens_features {
        unsigned int adc:1;
        unsigned int srot_split:1;
        unsigned int has_watchdog:1;
+       unsigned int zeroc_int:1;
        unsigned int max_sensors;
 };
 

@@ -549,6 +556,7 @@ struct tsens_context {
  * @feat: features of the IP
  * @fields: bitfield locations
  * @ops: pointer to list of callbacks supported by this device
+ * @zeroc_en: variable to check zeroc interrupt sensor is enabled or 

not
* @debug_root: pointer to debugfs dentry for all tsens
* @debug: pointer to debugfs dentry for tsens controller
* @sensor: list of sensors attached to this device

drivers/thermal/qcom/tsens.h +2 -0

@@ -568,6 +576,7 @@ struct tsens_priv {
        struct tsens_features           *feat;
        const struct reg_field          *fields;
        const struct tsens_ops          *ops;
+       bool                            zeroc_en;
 
        struct dentry                   *debug_root;
        struct dentry                   *debug;

@@ -580,6 +589,7 @@ void compute_intercept_slope(struct tsens_priv 
 *priv, u32 *pt1, u32 *pt2, u32 mo
 int init_common(struct tsens_priv *priv);
 int get_temp_tsens_valid(const struct tsens_sensor *s, int *temp);
 int get_temp_common(const struct tsens_sensor *s, int *temp);
+int get_tsens_zeroc_status(const struct tsens_sensor *s, int *temp);
 
 /* TSENS target */

extern struct tsens_plat_data data_8960;
--
2.26.2

Add zeroc interrupt support for tsens in yaml.

Signed-off-by Manaf Meethalavalappu Pallikunhi <[email protected]>

---
 .../bindings/thermal/qcom-tsens.yaml          | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)