From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: jmfriedt@femto-st.fr To: linux-iio@vger.kernel.org Cc: lars@metafoo.de, Michael.Hennerich@analog.com, jic23@kernel.org, knaack.h@gmx.de, pmeerw@pmeerw.net, JM Friedt Subject: [PATCH 1/1] iio: DAC: ad5624r_spi: fix bit shift of output data value Date: Fri, 19 Jun 2015 14:48:06 +0200 Message-Id: <1434718086-14722-1-git-send-email-jmfriedt@femto-st.fr> List-ID: From: JM Friedt 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 --- drivers/iio/dac/ad5624r_spi.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iio/dac/ad5624r_spi.c b/drivers/iio/dac/ad5624r_spi.c index 61bb9d4..e98428d 100644 --- 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_device *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; -- 1.7.2.5