From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Subject: patch "iio: inv-mpu: Specify the expected format/precision for write" added to staging-linus To: adriana.reus@intel.com, Stable@vger.kernel.org, jic23@kernel.org From: Date: Mon, 13 Jul 2015 14:18:40 -0700 Message-ID: <1436822320174146@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled iio: inv-mpu: Specify the expected format/precision for write 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 6a3c45bb5a385be7049a7725a4fe93eaa76915f4 Mon Sep 17 00:00:00 2001 From: Adriana Reus Date: Fri, 12 Jun 2015 18:10:23 +0300 Subject: iio: inv-mpu: Specify the expected format/precision for write channels The gyroscope needs IIO_VAL_INT_PLUS_NANO for the scale channel and unless specified write returns MICRO by default. This needs to be properly specified so that write operations into scale have the expected behaviour. Signed-off-by: Adriana Reus Cc: Signed-off-by: Jonathan Cameron --- drivers/iio/imu/inv_mpu6050/inv_mpu_core.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c index 17d4bb15be4d..65ce86837177 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c @@ -431,6 +431,23 @@ static int inv_mpu6050_write_gyro_scale(struct inv_mpu6050_state *st, int val) return -EINVAL; } +static int inv_write_raw_get_fmt(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, long mask) +{ + switch (mask) { + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_ANGL_VEL: + return IIO_VAL_INT_PLUS_NANO; + default: + return IIO_VAL_INT_PLUS_MICRO; + } + default: + return IIO_VAL_INT_PLUS_MICRO; + } + + return -EINVAL; +} static int inv_mpu6050_write_accel_scale(struct inv_mpu6050_state *st, int val) { int result, i; @@ -696,6 +713,7 @@ static const struct iio_info mpu_info = { .driver_module = THIS_MODULE, .read_raw = &inv_mpu6050_read_raw, .write_raw = &inv_mpu6050_write_raw, + .write_raw_get_fmt = &inv_write_raw_get_fmt, .attrs = &inv_attribute_group, .validate_trigger = inv_mpu6050_validate_trigger, }; -- 2.4.5