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Fri, 11 Jul 2025 08:34:06 -0700 (PDT) From: David Lechner Date: Fri, 11 Jul 2025 10:33:55 -0500 Subject: [PATCH] iio: temperature: maxim_thermocouple: use IIO_DECLARE_DMA_BUFFER_WITH_TS() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250711-iio-use-more-iio_declare_buffer_with_ts-3-v1-1-f6dd3363fd85@baylibre.com> X-B4-Tracking: v=1; b=H4sIAOIucWgC/x3N0QrCMAxA0V8ZeTawdriJvyJSujR1AV0l2VQY+ 3erj+fl3g2MVdjg3Gyg/BKTMle4QwM0xfnGKKkafOuP7eAcihRcjfFRlH8IiekelcO45swa3rJ MYTHs0BN1pyH2/ZgIau+pnOXzf12u+/4FEksheHsAAAA= X-Change-ID: 20250711-iio-use-more-iio_declare_buffer_with_ts-3-2cc387a66bdc To: Jonathan Cameron , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, David Lechner X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1723; i=dlechner@baylibre.com; h=from:subject:message-id; bh=ebT2s7nXALqt6/yObzMeAm/ZCc1oP9CJhn5ID/ByeoY=; b=owEBbQGS/pANAwAKAcLMIAH/AY/AAcsmYgBocS7msivCC30zn1X+Gu/q9gRTPYZ7F35T4whGE IXSZg011mmJATMEAAEKAB0WIQTsGNmeYg6D1pzYaJjCzCAB/wGPwAUCaHEu5gAKCRDCzCAB/wGP wEktB/49NdsstQvtK9AX+6VglLicdjumTe23CFtB7TSZO/kAQ5HQv0wtejfGPga0imk9oydYhKl IEh7HTAXtU2IkhV+Diu4D4whrsnHfrz+cdx2q1NRsKwa7nPiv4zZ++IUWLeo7AoV+gzLJdPRZRt bzIGL9CJ0oimZ6kH4lfCEUHAcv5d754CkK5oaJHldDxmE18yUkApEYKioU2/s6wlmSDJ75V0wbu lj/CfzjQ2V4Or2GAW76KauC0wumD54BEFrdciW/AhLINtjzyyLrdc/9arZ3+Uq8YiEugCkZNSH2 na/Zx2CCmu67rxDeJFejDoSVZA9dtFuKb8+6W/ApZseI5XcM X-Developer-Key: i=dlechner@baylibre.com; a=openpgp; fpr=8A73D82A6A1F509907F373881F8AF88C82F77C03 Use IIO_DECLARE_DMA_BUFFER_WITH_TS() to declare the buffer used for scan data. There was not any documentation explaining the buffer layout previously, and this makes it self-documenting. The element type is also changed to __be16 to match the format of the data read from the device. This way, the count argument to IIO_DECLARE_DMA_BUFFER_WITH_TS() is just the number of channels rather than needing to calculate the number of bytes required. Signed-off-by: David Lechner --- drivers/iio/temperature/maxim_thermocouple.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/iio/temperature/maxim_thermocouple.c b/drivers/iio/tem= perature/maxim_thermocouple.c index cae8e84821d7fd521d59432580d51def939fa4d1..60eaa8140d3e98e10c073c8d18c= f01524b1c1816 100644 --- a/drivers/iio/temperature/maxim_thermocouple.c +++ b/drivers/iio/temperature/maxim_thermocouple.c @@ -18,6 +18,8 @@ #include #include =20 +#include + #define MAXIM_THERMOCOUPLE_DRV_NAME "maxim_thermocouple" =20 enum { @@ -121,8 +123,8 @@ struct maxim_thermocouple_data { struct spi_device *spi; const struct maxim_thermocouple_chip *chip; char tc_type; - - u8 buffer[16] __aligned(IIO_DMA_MINALIGN); + /* Buffer for reading up to 2 hardware channels. */ + IIO_DECLARE_DMA_BUFFER_WITH_TS(__be16, buffer, 2); }; =20 static int maxim_thermocouple_read(struct maxim_thermocouple_data *data, --- base-commit: f8f559752d573a051a984adda8d2d1464f92f954 change-id: 20250711-iio-use-more-iio_declare_buffer_with_ts-3-2cc387a66bdc Best regards, --=20 David Lechner