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@xxxxxxxxxx> --- 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.
