[PATCH v2 2/2] thermal: qcom: tsens: Disable wakeup interrupt setup on automotive targets

[Priyansh Jain]

Add a no_irq_wake flag to struct tsens_plat_data to allow platforms
to control whether TSENS interrupts should be configured as wakeup
sources.

Create a new data_automotive structure and add compatible strings for
automotive TSENS variants (SA8775P, SA8255P) with wakeup interrupts
disabled.

Automotive platforms can enter a low-power parking suspend state where the
application processors and thermal mitigation paths are not active. In this
state, waking the system due to TSENS threshold interrupts does not enable
useful thermal action, but it does repeatedly break suspend residency and
increase battery drain.

Allow these automotive variants to keep TSENS monitoring enabled during
normal runtime while opting out of TSENS wakeup interrupts during suspend,
so the system can remain in low power until ignition/resume.

Signed-off-by: Priyansh Jain <priyansh.jain@xxxxxxxxxxxxxxxx>
---
 drivers/thermal/qcom/tsens-v2.c | 8 ++++++++
 drivers/thermal/qcom/tsens.c    | 8 +++++++-
 drivers/thermal/qcom/tsens.h    | 5 +++++
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/drivers/thermal/qcom/tsens-v2.c b/drivers/thermal/qcom/tsens-v2.c
index e06f8e5802e8..2ee117aa91ba 100644
--- a/drivers/thermal/qcom/tsens-v2.c
+++ b/drivers/thermal/qcom/tsens-v2.c
@@ -306,3 +306,11 @@ struct tsens_plat_data data_8996 = {
 	.feat		= &tsens_v2_feat,
 	.fields	= tsens_v2_regfields,
 };
+
+/* Do not enable wakeup capable interrupts for automotive platforms */
+struct tsens_plat_data data_automotive_v2 = {
+	.ops		= &ops_generic_v2,
+	.feat		= &tsens_v2_feat,
+	.fields		= tsens_v2_regfields,
+	.no_irq_wake = true,
+};
diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
index 5210985b3767..6237e000640b 100644
--- a/drivers/thermal/qcom/tsens.c
+++ b/drivers/thermal/qcom/tsens.c
@@ -1169,6 +1169,12 @@ static const struct of_device_id tsens_table[] = {
 	}, {
 		.compatible = "qcom,tsens-v2",
 		.data = &data_tsens_v2,
+	}, {
+		.compatible = "qcom,sa8775p-tsens",
+		.data = &data_automotive_v2,
+	}, {
+		.compatible = "qcom,sa8255p-tsens",
+		.data = &data_automotive_v2,
 	},
 	{}
 };
@@ -1381,7 +1387,7 @@ static int tsens_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, priv);
 
-	device_init_wakeup(dev, true);
+	device_init_wakeup(dev, !data->no_irq_wake);
 
 	if (!priv->ops || !priv->ops->init || !priv->ops->get_temp)
 		return -EINVAL;
diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
index 5e2da4e0d51b..d20d514bf8ce 100644
--- a/drivers/thermal/qcom/tsens.h
+++ b/drivers/thermal/qcom/tsens.h
@@ -531,6 +531,7 @@ struct tsens_features {
  * @hw_ids: Subset of sensors ids supported by platform, if not the first n
  * @feat: features of the IP
  * @fields: bitfield locations
+ * @no_irq_wake: if set, TSENS interrupts will not be configured as wakeup sources
  */
 struct tsens_plat_data {
 	const u32		num_sensors;
@@ -538,6 +539,7 @@ struct tsens_plat_data {
 	unsigned int		*hw_ids;
 	struct tsens_features	*feat;
 	const struct reg_field		*fields;
+	bool		no_irq_wake;
 };
 
 /**
@@ -675,4 +677,7 @@ extern const struct tsens_plat_data data_ipq5018;
 extern struct tsens_plat_data data_8996, data_ipq8074, data_tsens_v2;
 extern const struct tsens_plat_data data_ipq5332, data_ipq5424;
 
+/* TSENS automotive targets */
+extern struct tsens_plat_data data_automotive_v2;
+
 #endif /* __QCOM_TSENS_H__ */

-- 
2.43.0