Messages in this thread | | | Subject | Re: [PATCH 2/3] i2c: mux: pca9541: namespace cleanup | From | Guenter Roeck <> | Date | Tue, 20 Mar 2018 06:20:37 -0700 |
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On 03/20/2018 02:31 AM, Peter Rosin wrote: > In preparation for PCA9641 support, convert the mybus and busoff macros > to functions, and in the process prefix them with pca9541_. Also prefix > remaining chip specific macros with PCA9541_. > > Signed-off-by: Peter Rosin <peda@axentia.se> > --- > drivers/i2c/muxes/i2c-mux-pca9541.c | 26 +++++++++++++++++++------- > 1 file changed, 19 insertions(+), 7 deletions(-) > > diff --git a/drivers/i2c/muxes/i2c-mux-pca9541.c b/drivers/i2c/muxes/i2c-mux-pca9541.c > index ad168125d23d..47685eb4e0e9 100644 > --- a/drivers/i2c/muxes/i2c-mux-pca9541.c > +++ b/drivers/i2c/muxes/i2c-mux-pca9541.c > @@ -59,10 +59,8 @@ > #define PCA9541_ISTAT_MYTEST BIT(6) > #define PCA9541_ISTAT_NMYTEST BIT(7) > > -#define BUSON (PCA9541_CTL_BUSON | PCA9541_CTL_NBUSON) > -#define MYBUS (PCA9541_CTL_MYBUS | PCA9541_CTL_NMYBUS) > -#define mybus(x) (!((x) & MYBUS) || ((x) & MYBUS) == MYBUS) > -#define busoff(x) (!((x) & BUSON) || ((x) & BUSON) == BUSON) > +#define PCA9541_BUSON (PCA9541_CTL_BUSON | PCA9541_CTL_NBUSON) > +#define PCA9541_MYBUS (PCA9541_CTL_MYBUS | PCA9541_CTL_NMYBUS) > > /* arbitration timeouts, in jiffies */ > #define ARB_TIMEOUT (HZ / 8) /* 125 ms until forcing bus ownership */ > @@ -93,6 +91,20 @@ static const struct of_device_id pca9541_of_match[] = { > MODULE_DEVICE_TABLE(of, pca9541_of_match); > #endif > > +static int pca9541_mybus(int ctl)
bool ?
> +{ > + if (!(ctl & PCA9541_MYBUS)) > + return 1;
true ?
> + return (ctl & PCA9541_MYBUS) == PCA9541_MYBUS; > +} > + > +static int pca9541_busoff(int ctl)
bool ?
> +{ > + if (!(ctl & PCA9541_BUSON)) > + return 1;
true ?
> + return (ctl & PCA9541_BUSON) == PCA9541_BUSON; > +} > + > /* > * Write to chip register. Don't use i2c_transfer()/i2c_smbus_xfer() > * as they will try to lock the adapter a second time. > @@ -181,7 +193,7 @@ static void pca9541_release_bus(struct i2c_client *client) > int reg; > > reg = pca9541_reg_read(client, PCA9541_CONTROL); > - if (reg >= 0 && !busoff(reg) && mybus(reg)) > + if (reg >= 0 && !pca9541_busoff(reg) && pca9541_mybus(reg)) > pca9541_reg_write(client, PCA9541_CONTROL, > (reg & PCA9541_CTL_NBUSON) >> 1); > } > @@ -233,7 +245,7 @@ static int pca9541_arbitrate(struct i2c_client *client) > if (reg < 0) > return reg; > > - if (busoff(reg)) { > + if (pca9541_busoff(reg)) { > int istat; > /* > * Bus is off. Request ownership or turn it on unless > @@ -258,7 +270,7 @@ static int pca9541_arbitrate(struct i2c_client *client) > */ > data->select_timeout = SELECT_DELAY_LONG * 2; > } > - } else if (mybus(reg)) { > + } else if (pca9541_mybus(reg)) { > /* > * Bus is on, and we own it. We are done with acquisition. > * Reset NTESTON and BUSINIT, then return success. >
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