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Wed, 05 Nov 2025 01:56:42 -0800 (PST) From: Antoni Pokusinski To: jic23@kernel.org, dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, marcelo.schmitt1@gmail.com Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Antoni Pokusinski Subject: [PATCH v3 1/3] iio: mpl3115: use get_unaligned_be24 to retrieve pressure data Date: Wed, 5 Nov 2025 10:56:13 +0100 Message-Id: <20251105095615.4310-2-apokusinski01@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20251105095615.4310-1-apokusinski01@gmail.com> References: <20251105095615.4310-1-apokusinski01@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The pressure measurement result is arranged as 20-bit unsigned value residing in three 8-bit registers. Hence, it can be retrieved using get_unaligned_be24 and by applying 4-bit shift. Signed-off-by: Antoni Pokusinski Reviewed-by: Andy Shevchenko Reviewed-by: Marcelo Schmitt --- drivers/iio/pressure/mpl3115.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/iio/pressure/mpl3115.c b/drivers/iio/pressure/mpl3115.c index c212dfdf59ff..3f1fa9fe3c76 100644 --- a/drivers/iio/pressure/mpl3115.c +++ b/drivers/iio/pressure/mpl3115.c @@ -16,6 +16,7 @@ #include #include #include +#include =20 #include #include @@ -125,7 +126,7 @@ static int mpl3115_read_info_raw(struct mpl3115_data *d= ata, =20 switch (chan->type) { case IIO_PRESSURE: { /* in 0.25 pascal / LSB */ - __be32 tmp =3D 0; + u8 tmp[3]; =20 guard(mutex)(&data->lock); ret =3D mpl3115_request(data); @@ -134,11 +135,11 @@ static int mpl3115_read_info_raw(struct mpl3115_data = *data, =20 ret =3D i2c_smbus_read_i2c_block_data(data->client, MPL3115_OUT_PRESS, - 3, (u8 *) &tmp); + sizeof(tmp), tmp); if (ret < 0) return ret; =20 - *val =3D be32_to_cpu(tmp) >> chan->scan_type.shift; + *val =3D get_unaligned_be24(tmp) >> 4; return IIO_VAL_INT; } case IIO_TEMP: { /* in 0.0625 celsius / LSB */ --=20 2.25.1