From 7a1046e5c0fdce80ba075c2edd8a97b7485693ce Mon Sep 17 00:00:00 2001 From: Ian Abbott Date: Mon, 21 Oct 2013 10:10:39 +0100 Subject: [PATCH] staging: comedi: s626: replace S626_MULT_X? values Replace the use of the `S626_MULT_X1`, `S626_MULT_X2` and `S626_MULT_X4` clock multiplier values with the equivalent `S626_CLKMULT_1X`, `S626_CLKMULT_2X` and `S626_CLKMULT_4X` values to avoid duplication. Replace the use of `S626_MULT_X0` with a new macro `S626_CLKMULT_SPECIAL` (this is treated specially by the 'ClkMultA'/'ClkMultB' field of the 'CRA'/'CRB' register). Remove the now unused `S626_MULT_X?` macros. Signed-off-by: Ian Abbott Reviewed-by: H Hartley Sweeten Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/s626.c | 28 ++++++++++++++-------------- drivers/staging/comedi/drivers/s626.h | 12 +----------- 2 files changed, 15 insertions(+), 25 deletions(-) diff --git a/drivers/staging/comedi/drivers/s626.c b/drivers/staging/comedi/drivers/s626.c index c2837da..6815cfe2 100644 --- a/drivers/staging/comedi/drivers/s626.c +++ b/drivers/staging/comedi/drivers/s626.c @@ -731,7 +731,7 @@ static uint16_t s626_get_mode_a(struct comedi_device *dev, /* Set ClkPol to indicate count direction (CntSrcA<0>). */ clkpol = cntsrc & 1; /* ClkMult must be 1x in Timer mode. */ - clkmult = S626_MULT_X1; + clkmult = S626_CLKMULT_1X; } else { /* Counter mode (CntSrcA<1> == 0): */ encmode = S626_ENCMODE_COUNTER; @@ -739,8 +739,8 @@ static uint16_t s626_get_mode_a(struct comedi_device *dev, clkpol = S626_GET_CRA_CLKPOL_A(cra); /* Force ClkMult to 1x if not legal, else pass through. */ clkmult = S626_GET_CRA_CLKMULT_A(cra); - if (clkmult == S626_MULT_X0) - clkmult = S626_MULT_X1; + if (clkmult == S626_CLKMULT_SPECIAL) + clkmult = S626_CLKMULT_1X; } setup |= S626_SET_STD_ENCMODE(encmode) | S626_SET_STD_CLKMULT(clkmult) | S626_SET_STD_CLKPOL(clkpol); @@ -781,18 +781,18 @@ static uint16_t s626_get_mode_b(struct comedi_device *dev, /* Adjust mode-dependent parameters. */ cntsrc = S626_GET_CRA_CNTSRC_B(cra); clkmult = S626_GET_CRB_CLKMULT_B(crb); - if (clkmult == S626_MULT_X0) { - /* Extender mode (ClkMultB == S626_MULT_X0): */ + if (clkmult == S626_CLKMULT_SPECIAL) { + /* Extender mode (ClkMultB == S626_CLKMULT_SPECIAL): */ encmode = S626_ENCMODE_EXTENDER; /* Indicate multiplier is 1x. */ - clkmult = S626_MULT_X1; + clkmult = S626_CLKMULT_1X; /* Set ClkPol equal to Timer count direction (CntSrcB<0>). */ clkpol = cntsrc & 1; } else if (cntsrc & S626_CNTSRC_SYSCLK) { /* Timer mode (CntSrcB<1> == 1): */ encmode = S626_ENCMODE_TIMER; /* Indicate multiplier is 1x. */ - clkmult = S626_MULT_X1; + clkmult = S626_CLKMULT_1X; /* Set ClkPol equal to Timer count direction (CntSrcB<0>). */ clkpol = cntsrc & 1; } else { @@ -853,7 +853,7 @@ static void s626_set_mode_a(struct comedi_device *dev, /* ClkPolA behaves as always-on clock enable. */ clkpol = 1; /* ClkMult must be 1x. */ - clkmult = S626_MULT_X1; + clkmult = S626_CLKMULT_1X; break; default: /* Counter Mode: */ /* Select ENC_C and ENC_D as clock/direction inputs. */ @@ -861,8 +861,8 @@ static void s626_set_mode_a(struct comedi_device *dev, /* Clock polarity is passed through. */ /* Force multiplier to x1 if not legal, else pass through. */ clkmult = S626_GET_STD_CLKMULT(setup); - if (clkmult == S626_MULT_X0) - clkmult = S626_MULT_X1; + if (clkmult == S626_CLKMULT_SPECIAL) + clkmult = S626_CLKMULT_1X; break; } cra |= S626_SET_CRA_CNTSRC_A(cntsrc) | S626_SET_CRA_CLKPOL_A(clkpol) | @@ -927,7 +927,7 @@ static void s626_set_mode_b(struct comedi_device *dev, /* ClkPolB behaves as always-on clock enable. */ clkpol = 1; /* ClkMultB must be 1x. */ - clkmult = S626_MULT_X1; + clkmult = S626_CLKMULT_1X; break; case S626_ENCMODE_EXTENDER: /* Extender Mode: */ /* CntSrcB source is OverflowA (same as "timer") */ @@ -937,7 +937,7 @@ static void s626_set_mode_b(struct comedi_device *dev, /* ClkPolB controls IndexB -- always set to active. */ clkpol = 1; /* ClkMultB selects OverflowA as the clock source. */ - clkmult = S626_MULT_X0; + clkmult = S626_CLKMULT_SPECIAL; break; default: /* Counter Mode: */ /* Select ENC_C and ENC_D as clock/direction inputs. */ @@ -945,8 +945,8 @@ static void s626_set_mode_b(struct comedi_device *dev, /* ClkPol is passed through. */ /* Force ClkMult to x1 if not legal, otherwise pass through. */ clkmult = S626_GET_STD_CLKMULT(setup); - if (clkmult == S626_MULT_X0) - clkmult = S626_MULT_X1; + if (clkmult == S626_CLKMULT_SPECIAL) + clkmult = S626_CLKMULT_1X; break; } cra |= S626_SET_CRA_CNTSRC_B(cntsrc); diff --git a/drivers/staging/comedi/drivers/s626.h b/drivers/staging/comedi/drivers/s626.h index cbd59eb..33b7273 100644 --- a/drivers/staging/comedi/drivers/s626.h +++ b/drivers/staging/comedi/drivers/s626.h @@ -498,17 +498,7 @@ #define S626_CLKMULT_4X 0 /* 4x clock multiplier. */ #define S626_CLKMULT_2X 1 /* 2x clock multiplier. */ #define S626_CLKMULT_1X 2 /* 1x clock multiplier. */ - -/* Enumerated counter clock multipliers. */ - -#define S626_MULT_X0 0x0003 /* Supports no multipliers; - * fixed physical multiplier = 3. */ -#define S626_MULT_X1 0x0002 /* Supports multiplier x1; - * fixed physical multiplier = 2. */ -#define S626_MULT_X2 0x0001 /* Supports multipliers x1, x2; - * physical multipliers = 1 or 2. */ -#define S626_MULT_X4 0x0000 /* Supports multipliers x1, x2, x4; - * physical multipliers = 0, 1 or 2. */ +#define S626_CLKMULT_SPECIAL 3 /* Special clock multiplier value. */ /* Sanity-check limits for parameters. */ -- 2.7.4