This is a note to let you know that I've just added the patch titled
iio: ad799x: Fix ad7991/ad7995/ad7999 config setup
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iio-ad799x-fix-ad7991-ad7995-ad7999-config-setup.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2eacc608b3bf3519fc353c558454873f4589146d Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@xxxxxxxxxx>
Date: Wed, 26 Nov 2014 11:35:35 +0100
Subject: iio: ad799x: Fix ad7991/ad7995/ad7999 config setup
From: Lars-Peter Clausen <lars@xxxxxxxxxx>
commit 2eacc608b3bf3519fc353c558454873f4589146d upstream.
The ad7991/ad7995/ad7999 does not have a configuration register like the
other devices that can be written and read. The configuration is written as
part of the conversion sequence.
Fixes: 0f7ddcc1bff1 ("iio:adc:ad799x: Write default config on probe and reset alert status on probe")
Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
Tested-by: Mike Looijmans <mike.looijmans@xxxxxxxx>
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iio/adc/ad799x.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
--- a/drivers/iio/adc/ad799x.c
+++ b/drivers/iio/adc/ad799x.c
@@ -143,9 +143,15 @@ static int ad799x_write_config(struct ad
case ad7998:
return i2c_smbus_write_word_swapped(st->client, AD7998_CONF_REG,
val);
- default:
+ case ad7992:
+ case ad7993:
+ case ad7994:
return i2c_smbus_write_byte_data(st->client, AD7998_CONF_REG,
val);
+ default:
+ /* Will be written when doing a conversion */
+ st->config = val;
+ return 0;
}
}
@@ -155,8 +161,13 @@ static int ad799x_read_config(struct ad7
case ad7997:
case ad7998:
return i2c_smbus_read_word_swapped(st->client, AD7998_CONF_REG);
- default:
+ case ad7992:
+ case ad7993:
+ case ad7994:
return i2c_smbus_read_byte_data(st->client, AD7998_CONF_REG);
+ default:
+ /* No readback support */
+ return st->config;
}
}
Patches currently in stable-queue which might be from lars@xxxxxxxxxx are
queue-3.18/iio-ad799x-fix-ad7991-ad7995-ad7999-config-setup.patch
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