From d2a6c32a2209ac79cb52b56e46ec37fdc1df6ce1 Mon Sep 17 00:00:00 2001 From: "Spencer E. Olson" Date: Wed, 27 Jan 2016 14:28:26 -0700 Subject: [PATCH] staging: comedi: ni_mio_common: make more bits in ao_cmd1 reg be stateful Bits NISTC_AO_CMD1_DAC0_UPDATE_MODE and NISTC_AO_CMD1_DAC1_UPDATE_MODE are now saved in the local copy of the AO_CMD1 register. This is more appropriate than prior methods of setting these bits specifically _both_ in the ni_ao_cmd configuration function _and_ the ni_ao_inttrig trigger function. With this patch, the bits are only specifically called out now in the ni_ao_cmd configuration function. In the ni_ao_inttrig trigger function, only the UI_ARM, UC_ARM, BC_ARM bits of the ao_cmd1 register are specifically called out. Each of these bits is a strobe bit, while the DAC[0-1]_UPDATE_MODE bits are simple write bits. Signed-off-by: Spencer E. Olson Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/ni_mio_common.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/staging/comedi/drivers/ni_mio_common.c b/drivers/staging/comedi/drivers/ni_mio_common.c index 7d2091d8b72b..9df20d922d32 100644 --- a/drivers/staging/comedi/drivers/ni_mio_common.c +++ b/drivers/staging/comedi/drivers/ni_mio_common.c @@ -2903,8 +2903,6 @@ static int ni_ao_inttrig(struct comedi_device *dev, ni_stc_writew(dev, NISTC_AO_CMD1_UI_ARM | NISTC_AO_CMD1_UC_ARM | NISTC_AO_CMD1_BC_ARM | - NISTC_AO_CMD1_DAC1_UPDATE_MODE | - NISTC_AO_CMD1_DAC0_UPDATE_MODE | devpriv->ao_cmd1, NISTC_AO_CMD1_REG); @@ -3081,9 +3079,11 @@ static int ni_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s) } ni_stc_writew(dev, devpriv->ao_mode1, NISTC_AO_MODE1_REG); - ni_stc_writew(dev, NISTC_AO_CMD1_DAC1_UPDATE_MODE | - NISTC_AO_CMD1_DAC0_UPDATE_MODE, - NISTC_AO_CMD1_REG); + /* Configure DAQ-STC for Timed update mode */ + devpriv->ao_cmd1 |= NISTC_AO_CMD1_DAC1_UPDATE_MODE | + NISTC_AO_CMD1_DAC0_UPDATE_MODE; + /* We are not using UPDATE2-->don't have to set DACx_Source_Select */ + ni_stc_writew(dev, devpriv->ao_cmd1, NISTC_AO_CMD1_REG); devpriv->ao_mode3 |= NISTC_AO_MODE3_STOP_ON_OVERRUN_ERR; ni_stc_writew(dev, devpriv->ao_mode3, NISTC_AO_MODE3_REG); -- 2.39.5