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[v2,1/2] iio: acpi_als: Add timestamp channel

Message ID 20201210204944.968290-2-gwendal@chromium.org (mailing list archive)
State New, archived
Headers show
Series iio: acpi_als: Add sotfware trigger support | expand

Commit Message

Gwendal Grignou Dec. 10, 2020, 8:49 p.m. UTC 
Add timestamp channel in list of channel, to allow retrieving timestamps
when events are produced.

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
---
 drivers/iio/light/acpi-als.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)
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Patch

diff --git a/drivers/iio/light/acpi-als.c b/drivers/iio/light/acpi-als.c
index 1eafd0b24e182..ff0ecec65fae4 100644
--- a/drivers/iio/light/acpi-als.c
+++ b/drivers/iio/light/acpi-als.c
@@ -45,24 +45,23 @@  static const struct iio_chan_spec acpi_als_channels[] = {
 		.info_mask_separate	= BIT(IIO_CHAN_INFO_RAW) |
 					  BIT(IIO_CHAN_INFO_PROCESSED),
 	},
+	IIO_CHAN_SOFT_TIMESTAMP(1),
 };
 
 /*
  * The event buffer contains timestamp and all the data from
  * the ACPI0008 block. There are multiple, but so far we only
- * support _ALI (illuminance). Once someone adds new channels
- * to acpi_als_channels[], the evt_buffer below will grow
- * automatically.
+ * support _ALI (illuminance):
+ * One channel, paddind and timestamp.
  */
-#define ACPI_ALS_EVT_NR_SOURCES		ARRAY_SIZE(acpi_als_channels)
 #define ACPI_ALS_EVT_BUFFER_SIZE		\
-	(sizeof(s64) + (ACPI_ALS_EVT_NR_SOURCES * sizeof(s32)))
+	(sizeof(s32) + sizeof(s32) + sizeof(s64))
 
 struct acpi_als {
 	struct acpi_device	*device;
 	struct mutex		lock;
 
-	s32			evt_buffer[ACPI_ALS_EVT_BUFFER_SIZE];
+	s32 evt_buffer[ACPI_ALS_EVT_BUFFER_SIZE / sizeof(s32)]  __aligned(8);
 };
 
 /*