This is a note to let you know that I've just added the patch titled
iio: DAC: ad5624r_spi: fix bit shift of output data value
to the 3.10-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-dac-ad5624r_spi-fix-bit-shift-of-output-data-value.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From adfa969850ae93beca57f7527f0e4dc10cbe1309 Mon Sep 17 00:00:00 2001
From: JM Friedt <jmfriedt@xxxxxxxxxxx>
Date: Fri, 19 Jun 2015 14:48:06 +0200
Subject: iio: DAC: ad5624r_spi: fix bit shift of output data value
From: JM Friedt <jmfriedt@xxxxxxxxxxx>
commit adfa969850ae93beca57f7527f0e4dc10cbe1309 upstream.
The value sent on the SPI bus is shifted by an erroneous number of bits.
The shift value was already computed in the iio_chan_spec structure and
hence subtracting this argument to 16 yields an erroneous data position
in the SPI stream.
Signed-off-by: JM Friedt <jmfriedt@xxxxxxxxxxx>
Acked-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iio/dac/ad5624r_spi.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/iio/dac/ad5624r_spi.c
+++ b/drivers/iio/dac/ad5624r_spi.c
@@ -22,7 +22,7 @@
#include "ad5624r.h"
static int ad5624r_spi_write(struct spi_device *spi,
- u8 cmd, u8 addr, u16 val, u8 len)
+ u8 cmd, u8 addr, u16 val, u8 shift)
{
u32 data;
u8 msg[3];
@@ -35,7 +35,7 @@ static int ad5624r_spi_write(struct spi_
* 14-, 12-bit input code followed by 0, 2, or 4 don't care bits,
* for the AD5664R, AD5644R, and AD5624R, respectively.
*/
- data = (0 << 22) | (cmd << 19) | (addr << 16) | (val << (16 - len));
+ data = (0 << 22) | (cmd << 19) | (addr << 16) | (val << shift);
msg[0] = data >> 16;
msg[1] = data >> 8;
msg[2] = data;
Patches currently in stable-queue which might be from jmfriedt@xxxxxxxxxxx are
queue-3.10/iio-dac-ad5624r_spi-fix-bit-shift-of-output-data-value.patch
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