linux-kernel - [PATCH 1/2] iio: mpl3115: add ctrl_reg4 to mpl3115

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Message-Id: <20251028213351.77368-2-apokusinski01@gmail.com>
Date: Tue, 28 Oct 2025 22:33:51 +0100
From: Antoni Pokusinski <apokusinski01@...il.com>
To: jic23@...nel.org,
	dlechner@...libre.com,
	nuno.sa@...log.com,
	andy@...nel.org,
	marcelo.schmitt1@...il.com
Cc: linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Antoni Pokusinski <apokusinski01@...il.com>
Subject: [PATCH 1/2] iio: mpl3115: add ctrl_reg4 to mpl3115_data

Cache the value of CTRL_REG4 in the mpl3115_data structure. This is a
preparation for adding support for the threshold events.

Signed-off-by: Antoni Pokusinski <apokusinski01@...il.com>
---
 drivers/iio/pressure/mpl3115.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/iio/pressure/mpl3115.c b/drivers/iio/pressure/mpl3115.c
index c212dfdf59ff..4cc103e20a39 100644
--- a/drivers/iio/pressure/mpl3115.c
+++ b/drivers/iio/pressure/mpl3115.c
@@ -83,6 +83,7 @@ struct mpl3115_data {
 	struct iio_trigger *drdy_trig;
 	struct mutex lock;
 	u8 ctrl_reg1;
+	u8 ctrl_reg4;
 };
 
 enum mpl3115_irq_pin {
@@ -376,6 +377,7 @@ static int mpl3115_config_interrupt(struct mpl3115_data *data,
 		goto reg1_cleanup;
 
 	data->ctrl_reg1 = ctrl_reg1;
+	data->ctrl_reg4 = ctrl_reg4;
 
 	return 0;
 
@@ -390,12 +392,15 @@ static int mpl3115_set_trigger_state(struct iio_trigger *trig, bool state)
 	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
 	struct mpl3115_data *data = iio_priv(indio_dev);
 	u8 ctrl_reg1 = data->ctrl_reg1;
-	u8 ctrl_reg4 = state ? MPL3115_CTRL4_INT_EN_DRDY : 0;
+	u8 ctrl_reg4 = data->ctrl_reg4;
 
-	if (state)
+	if (state) {
 		ctrl_reg1 |= MPL3115_CTRL1_ACTIVE;
-	else
+		ctrl_reg4 |= MPL3115_CTRL4_INT_EN_DRDY;
+	} else {
 		ctrl_reg1 &= ~MPL3115_CTRL1_ACTIVE;
+		ctrl_reg4 &= ~MPL3115_CTRL4_INT_EN_DRDY;
+	}
 
 	guard(mutex)(&data->lock);
 
-- 
2.25.1