This is a note to let you know that I've just added the patch titled
iio:adc:ti_am335x_adc Fix buffered mode by identifying as software
to my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-linus branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.
If you have any questions about this process, please let me know.
>From 9d0be85d4e2cfa2519ae16efe7ff4a7150c43c0b Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <jic23@xxxxxxxxxx>
Date: Fri, 1 Jan 2016 18:05:34 +0000
Subject: iio:adc:ti_am335x_adc Fix buffered mode by identifying as software
buffer.
Whilst this part has a hardware buffer, the identifcation that IIO cares
about is the userspace facing end. It this case we push individual elements
from the hardware fifo into the software interface (specifically a kfifo)
rather than providing direct reads through to a hardware buffer
(as we still do in the sca3000 for example).
Technically the original specification as a hardware buffer could be
considered wrong, but it didn't matter until the patch listed below.
Result is that any attempt to enable the buffer will return -EINVAL
Fixes: 225d59adf1c8 ("iio: Specify supported modes for buffers")
Cc: <Stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx>
---
drivers/iio/adc/ti_am335x_adc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index 942320e32753..c1e05532d437 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -289,7 +289,7 @@ static int tiadc_iio_buffered_hardware_setup(struct iio_dev *indio_dev,
goto error_kfifo_free;
indio_dev->setup_ops = setup_ops;
- indio_dev->modes |= INDIO_BUFFER_HARDWARE;
+ indio_dev->modes |= INDIO_BUFFER_SOFTWARE;
return 0;
--
2.7.0
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