From 6eb2455dcf1353408c7525ad8617314b3c084efc Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Tue, 13 Oct 2015 17:47:47 -0700 Subject: [PATCH] staging: comedi: cb_pcidas: tidy up trimpot_8402_write() Rename this function so it has namespace associated with the driver. Change the return type to void, it always returns '0' and the return value is never checked. For aesthetics, remove the 'static const' local variables. They don't add any significant value. Remove the 'bitstream' local variable. The 'value' passed to this function will always be in the correct range due to s->maxdata so the masking is not necessary. Change the type of the 'value' param to match the callers type and write_calibration_bitstream()'s type. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/cb_pcidas.c | 28 ++++++++++------------ 1 file changed, 13 insertions(+), 15 deletions(-) diff --git a/drivers/staging/comedi/drivers/cb_pcidas.c b/drivers/staging/comedi/drivers/cb_pcidas.c index 84bc3defcc2d..3c1a747ea1ad 100644 --- a/drivers/staging/comedi/drivers/cb_pcidas.c +++ b/drivers/staging/comedi/drivers/cb_pcidas.c @@ -645,26 +645,24 @@ static void cb_pcidas_trimpot_7376_write(struct comedi_device *dev, outw(cal_enable_bits(dev), devpriv->pcibar1 + PCIDAS_CALIB_REG); } -static int trimpot_8402_write(struct comedi_device *dev, unsigned int channel, - u8 value) +static void cb_pcidas_trimpot_8402_write(struct comedi_device *dev, + unsigned int chan, unsigned int val) { struct cb_pcidas_private *devpriv = dev->private; - static const int bitstream_length = 10; - unsigned int bitstream = ((channel & 0x3) << 8) | (value & 0xff); - unsigned int register_bits; - static const int ad8402_udelay = 1; + unsigned int calib_bits; - register_bits = cal_enable_bits(dev) | PCIDAS_CALIB_TRIM_SEL; - udelay(ad8402_udelay); - outw(register_bits, devpriv->pcibar1 + PCIDAS_CALIB_REG); + /* select trimpot */ + calib_bits = cal_enable_bits(dev) | PCIDAS_CALIB_TRIM_SEL; + udelay(1); + outw(calib_bits, devpriv->pcibar1 + PCIDAS_CALIB_REG); - write_calibration_bitstream(dev, register_bits, bitstream, - bitstream_length); + /* write 10-bit value */ + write_calibration_bitstream(dev, calib_bits, + ((chan & 0x3) << 8) | val, 10); + udelay(1); - udelay(ad8402_udelay); + /* latch value */ outw(cal_enable_bits(dev), devpriv->pcibar1 + PCIDAS_CALIB_REG); - - return 0; } static void cb_pcidas_trimpot_write(struct comedi_device *dev, @@ -677,7 +675,7 @@ static void cb_pcidas_trimpot_write(struct comedi_device *dev, cb_pcidas_trimpot_7376_write(dev, val); break; case AD8402: - trimpot_8402_write(dev, chan, val); + cb_pcidas_trimpot_8402_write(dev, chan, val); break; default: dev_err(dev->class_dev, "driver bug?\n"); -- 2.39.5