On 14/11/15 17:10, Ranjith Thangavel wrote:
BIT macro is used for defining BIT location instead of shifting operator, usleep_range is preferred over udelay - coding style issue
Those two things should be done in separate patches.
Signed-off-by: Ranjith Thangavel <ranjithece24@xxxxxxxxx> --- drivers/staging/comedi/drivers/dmm32at.c | 104 +++++++++++++++--------------- 1 file changed, 52 insertions(+), 52 deletions(-) diff --git a/drivers/staging/comedi/drivers/dmm32at.c b/drivers/staging/comedi/drivers/dmm32at.c index 958c0d4..0836d39 100644 --- a/drivers/staging/comedi/drivers/dmm32at.c +++ b/drivers/staging/comedi/drivers/dmm32at.c @@ -46,74 +46,74 @@ #define DMM32AT_AI_START_CONV_REG 0x00 #define DMM32AT_AI_LSB_REG 0x00 #define DMM32AT_AUX_DOUT_REG 0x01 -#define DMM32AT_AUX_DOUT2 (1 << 2) /* J3.42 - OUT2 (OUT2EN) */ -#define DMM32AT_AUX_DOUT1 (1 << 1) /* J3.43 */ -#define DMM32AT_AUX_DOUT0 (1 << 0) /* J3.44 - OUT0 (OUT0EN) */ +#define DMM32AT_AUX_DOUT2 BIT(2) /* J3.42 - OUT2 (OUT2EN) */ +#define DMM32AT_AUX_DOUT1 BIT(1) /* J3.43 */ +#define DMM32AT_AUX_DOUT0 BIT(0) /* J3.44 - OUT0 (OUT0EN) */ #define DMM32AT_AI_MSB_REG 0x01 #define DMM32AT_AI_LO_CHAN_REG 0x02 #define DMM32AT_AI_HI_CHAN_REG 0x03 #define DMM32AT_AUX_DI_REG 0x04 -#define DMM32AT_AUX_DI_DACBUSY (1 << 7) -#define DMM32AT_AUX_DI_CALBUSY (1 << 6) -#define DMM32AT_AUX_DI3 (1 << 3) /* J3.45 - ADCLK (CLKSEL) */ -#define DMM32AT_AUX_DI2 (1 << 2) /* J3.46 - GATE12 (GT12EN) */ -#define DMM32AT_AUX_DI1 (1 << 1) /* J3.47 - GATE0 (GT0EN) */ -#define DMM32AT_AUX_DI0 (1 << 0) /* J3.48 - CLK0 (SRC0) */ +#define DMM32AT_AUX_DI_DACBUSY BIT(7) +#define DMM32AT_AUX_DI_CALBUSY BIT(6) +#define DMM32AT_AUX_DI3 BIT(3) /* J3.45 - ADCLK (CLKSEL) */ +#define DMM32AT_AUX_DI2 BIT(2) /* J3.46 - GATE12 (GT12EN) */ +#define DMM32AT_AUX_DI1 BIT(1) /* J3.47 - GATE0 (GT0EN) */ +#define DMM32AT_AUX_DI0 BIT(0) /* J3.48 - CLK0 (SRC0) */ #define DMM32AT_AO_LSB_REG 0x04 #define DMM32AT_AO_MSB_REG 0x05 #define DMM32AT_AO_MSB_DACH(x) ((x) << 6) #define DMM32AT_FIFO_DEPTH_REG 0x06 #define DMM32AT_FIFO_CTRL_REG 0x07 -#define DMM32AT_FIFO_CTRL_FIFOEN (1 << 3) -#define DMM32AT_FIFO_CTRL_SCANEN (1 << 2) -#define DMM32AT_FIFO_CTRL_FIFORST (1 << 1) +#define DMM32AT_FIFO_CTRL_FIFOEN BIT(3) +#define DMM32AT_FIFO_CTRL_SCANEN BIT(2) +#define DMM32AT_FIFO_CTRL_FIFORST BIT(1) #define DMM32AT_FIFO_STATUS_REG 0x07 -#define DMM32AT_FIFO_STATUS_EF (1 << 7) -#define DMM32AT_FIFO_STATUS_HF (1 << 6) -#define DMM32AT_FIFO_STATUS_FF (1 << 5) -#define DMM32AT_FIFO_STATUS_OVF (1 << 4) -#define DMM32AT_FIFO_STATUS_FIFOEN (1 << 3) -#define DMM32AT_FIFO_STATUS_SCANEN (1 << 2) -#define DMM32AT_FIFO_STATUS_PAGE_MASK (3 << 0) +#define DMM32AT_FIFO_STATUS_EF BIT(7) +#define DMM32AT_FIFO_STATUS_HF BIT(6) +#define DMM32AT_FIFO_STATUS_FF BIT(5) +#define DMM32AT_FIFO_STATUS_OVF BIT(4) +#define DMM32AT_FIFO_STATUS_FIFOEN BIT(3) +#define DMM32AT_FIFO_STATUS_SCANEN BIT(2) +#define DMM32AT_FIFO_STATUS_PAGE_MASK 0
As Dan Carpenter pointer out the new value of DMM32AT_FIFO_STATUS_PAGE_MASK is wrong (the old value was 3).
#define DMM32AT_CTRL_REG 0x08 -#define DMM32AT_CTRL_RESETA (1 << 5) -#define DMM32AT_CTRL_RESETD (1 << 4) -#define DMM32AT_CTRL_INTRST (1 << 3) -#define DMM32AT_CTRL_PAGE_8254 (0 << 0) -#define DMM32AT_CTRL_PAGE_8255 (1 << 0) -#define DMM32AT_CTRL_PAGE_CALIB (3 << 0) +#define DMM32AT_CTRL_RESETA BIT(5) +#define DMM32AT_CTRL_RESETD BIT(4) +#define DMM32AT_CTRL_INTRST BIT(3) +#define DMM32AT_CTRL_PAGE_8254 0 +#define DMM32AT_CTRL_PAGE_8255 BIT(0) +#define DMM32AT_CTRL_PAGE_CALIB 0
The new value of DMM32AT_CTRL_PAGE_CALIB is wrong - the old value is 3. DMM32AT_CTRL_PAGE_8254, DMM32AT_CTRL_PAGE_8255 and DMM32AT_CTRL_PAGE_CALIB are 2-bit values, so the BIT() macro isn't really the best representation.
(To be honest, I don't really know what the preferred representation of shifted multi-bit values is.)
#define DMM32AT_AI_STATUS_REG 0x08 -#define DMM32AT_AI_STATUS_STS (1 << 7) -#define DMM32AT_AI_STATUS_SD1 (1 << 6) -#define DMM32AT_AI_STATUS_SD0 (1 << 5) +#define DMM32AT_AI_STATUS_STS BIT(7) +#define DMM32AT_AI_STATUS_SD1 BIT(6) +#define DMM32AT_AI_STATUS_SD0 BIT(5) #define DMM32AT_AI_STATUS_ADCH_MASK (0x1f << 0) #define DMM32AT_INTCLK_REG 0x09 -#define DMM32AT_INTCLK_ADINT (1 << 7) -#define DMM32AT_INTCLK_DINT (1 << 6) -#define DMM32AT_INTCLK_TINT (1 << 5) -#define DMM32AT_INTCLK_CLKEN (1 << 1) /* 1=see below 0=software */ -#define DMM32AT_INTCLK_CLKSEL (1 << 0) /* 1=OUT2 0=EXTCLK */ +#define DMM32AT_INTCLK_ADINT BIT(7) +#define DMM32AT_INTCLK_DINT BIT(6) +#define DMM32AT_INTCLK_TINT BIT(5) +#define DMM32AT_INTCLK_CLKEN BIT(1) /* 1=see below 0=software */ +#define DMM32AT_INTCLK_CLKSEL BIT(0) /* 1=OUT2 0=EXTCLK */ #define DMM32AT_CTRDIO_CFG_REG 0x0a -#define DMM32AT_CTRDIO_CFG_FREQ12 (1 << 7) /* CLK12 1=100KHz 0=10MHz */ -#define DMM32AT_CTRDIO_CFG_FREQ0 (1 << 6) /* CLK0 1=10KHz 0=10MHz */ -#define DMM32AT_CTRDIO_CFG_OUT2EN (1 << 5) /* J3.42 1=OUT2 is DOUT2 */ -#define DMM32AT_CTRDIO_CFG_OUT0EN (1 << 4) /* J3,44 1=OUT0 is DOUT0 */ -#define DMM32AT_CTRDIO_CFG_GT0EN (1 << 2) /* J3.47 1=DIN1 is GATE0 */ -#define DMM32AT_CTRDIO_CFG_SRC0 (1 << 1) /* CLK0 is 0=FREQ0 1=J3.48 */ -#define DMM32AT_CTRDIO_CFG_GT12EN (1 << 0) /* J3.46 1=DIN2 is GATE12 */ +#define DMM32AT_CTRDIO_CFG_FREQ12 BIT(7) /* CLK12 1=100KHz 0=10MHz */ +#define DMM32AT_CTRDIO_CFG_FREQ0 BIT(6) /* CLK0 1=10KHz 0=10MHz */ +#define DMM32AT_CTRDIO_CFG_OUT2EN BIT(5) /* J3.42 1=OUT2 is DOUT2 */ +#define DMM32AT_CTRDIO_CFG_OUT0EN BIT(4) /* J3,44 1=OUT0 is DOUT0 */ +#define DMM32AT_CTRDIO_CFG_GT0EN BIT(2) /* J3.47 1=DIN1 is GATE0 */ +#define DMM32AT_CTRDIO_CFG_SRC0 BIT(1) /* CLK0 is 0=FREQ0 1=J3.48 */ +#define DMM32AT_CTRDIO_CFG_GT12EN BIT(0) /* J3.46 1=DIN2 is GATE12 */ #define DMM32AT_AI_CFG_REG 0x0b -#define DMM32AT_AI_CFG_SCINT_20US (0 << 4) -#define DMM32AT_AI_CFG_SCINT_15US (1 << 4) -#define DMM32AT_AI_CFG_SCINT_10US (2 << 4) -#define DMM32AT_AI_CFG_SCINT_5US (3 << 4) -#define DMM32AT_AI_CFG_RANGE (1 << 3) /* 0=5V 1=10V */ -#define DMM32AT_AI_CFG_ADBU (1 << 2) /* 0=bipolar 1=unipolar */ +#define DMM32AT_AI_CFG_SCINT_20US 0 +#define DMM32AT_AI_CFG_SCINT_15US BIT(4) +#define DMM32AT_AI_CFG_SCINT_10US (BIT(5) & ~BIT(4)) +#define DMM32AT_AI_CFG_SCINT_5US (BIT(5) | BIT(4))
The values of DMM32AT_AI_CFG_SCINT_20US etc. are numerically correct, but look a bit strange. The `(BIT(5) & ~BIT(4))` looks especially strange and could be changed to `BIT(5)`. These are all really shifted 2-bit values, so perhaps the BIT() macro isn't the best representation.
+#define DMM32AT_AI_CFG_RANGE BIT(3) /* 0=5V 1=10V */ +#define DMM32AT_AI_CFG_ADBU BIT(2) /* 0=bipolar 1=unipolar */ #define DMM32AT_AI_CFG_GAIN(x) ((x) << 0) #define DMM32AT_AI_READBACK_REG 0x0b -#define DMM32AT_AI_READBACK_WAIT (1 << 7) /* DMM32AT_AI_STATUS_STS */ -#define DMM32AT_AI_READBACK_RANGE (1 << 3) -#define DMM32AT_AI_READBACK_ADBU (1 << 2) -#define DMM32AT_AI_READBACK_GAIN_MASK (3 << 0) +#define DMM32AT_AI_READBACK_WAIT BIT(7) /* DMM32AT_AI_STATUS_STS */ +#define DMM32AT_AI_READBACK_RANGE BIT(3) +#define DMM32AT_AI_READBACK_ADBU BIT(2) +#define DMM32AT_AI_READBACK_GAIN_MASK 0
The value of DMM32AT_AI_READBACK_GAIN_MASK is wrong - the old value was 3.
#define DMM32AT_CLK1 0x0d #define DMM32AT_CLK2 0x0e @@ -508,7 +508,7 @@ static int dmm32at_reset(struct comedi_device *dev) outb(DMM32AT_CTRL_RESETA, dev->iobase + DMM32AT_CTRL_REG); /* allow a millisecond to reset */ - udelay(1000); + usleep_range(1000, 1050); /* zero scan and fifo control */ outb(0x0, dev->iobase + DMM32AT_FIFO_CTRL_REG); @@ -524,7 +524,7 @@ static int dmm32at_reset(struct comedi_device *dev) outb(DMM32AT_RANGE_U10, dev->iobase + DMM32AT_AI_CFG_REG); /* should take 10 us to settle, here's a hundred */ - udelay(100); + usleep_range(100, 150); /* read back the values */ ailo = inb(dev->iobase + DMM32AT_AI_LO_CHAN_REG);
The usleep_range() stuff is unrelated to the use of the BIT() macro and should be in a separate patch.
-- -=( Ian Abbott @ MEV Ltd. E-mail: <abbotti@xxxxxxxxx> )=- -=( Web: http://www.mev.co.uk/ )=- _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
