diff options
| -rw-r--r-- | drivers/i2c/algos/i2c-algo-pcf.c | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/drivers/i2c/algos/i2c-algo-pcf.c b/drivers/i2c/algos/i2c-algo-pcf.c index 7e2d8ff33d75..41a81d37e880 100644 --- a/drivers/i2c/algos/i2c-algo-pcf.c +++ b/drivers/i2c/algos/i2c-algo-pcf.c @@ -129,7 +129,7 @@ static int wait_for_pin(struct i2c_algo_pcf_data *adap, int *status) * * vdovikin: added detect code for PCF8584 */ -static int pcf_init_8584 (struct i2c_algo_pcf_data *adap) +static int pcf_init_8584(struct i2c_algo_pcf_data *adap) { unsigned char temp; @@ -139,38 +139,38 @@ static int pcf_init_8584 (struct i2c_algo_pcf_data *adap) * check to see S1 now used as R/W ctrl - * PCF8584 does that when ESO is zero */ - if (((temp = get_pcf(adap, 1)) & 0x7f) != (0)) { + temp = get_pcf(adap, 1); + if ((temp & 0x7f) != 0) return -ENXIO; /* definitely not PCF8584 */ - } /* load own address in S0, effective address is (own << 1) */ i2c_outb(adap, get_own(adap)); /* check it's really written */ - if ((temp = i2c_inb(adap)) != get_own(adap)) { + temp = i2c_inb(adap); + if (temp != get_own(adap)) return -ENXIO; - } /* S1=0xA0, next byte in S2 */ set_pcf(adap, 1, I2C_PCF_PIN | I2C_PCF_ES1); /* check to see S2 now selected */ - if (((temp = get_pcf(adap, 1)) & 0x7f) != I2C_PCF_ES1) { + temp = get_pcf(adap, 1); + if ((temp & 0x7f) != I2C_PCF_ES1) return -ENXIO; - } /* load clock register S2 */ i2c_outb(adap, get_clock(adap)); /* check it's really written, the only 5 lowest bits does matter */ - if (((temp = i2c_inb(adap)) & 0x1f) != get_clock(adap)) { + temp = i2c_inb(adap); + if ((temp & 0x1f) != get_clock(adap)) return -ENXIO; - } /* Enable serial interface, idle, S0 selected */ set_pcf(adap, 1, I2C_PCF_IDLE); /* check to see PCF is really idled and we can access status register */ - if ((temp = get_pcf(adap, 1)) != (I2C_PCF_PIN | I2C_PCF_BB)) { + temp = get_pcf(adap, 1); + if (temp != (I2C_PCF_PIN | I2C_PCF_BB)) return -ENXIO; - } printk(KERN_DEBUG "i2c-algo-pcf.o: detected and initialized PCF8584.\n"); @@ -218,7 +218,8 @@ static int pcf_readbytes(struct i2c_adapter *i2c_adap, char *buf, /* increment number of bytes to read by one -- read dummy byte */ for (i = 0; i <= count; i++) { - if ((wfp = wait_for_pin(adap, &status))) { + wfp = wait_for_pin(adap, &status); + if (wfp) { if (wfp == -EINTR) return -EINTR; /* arbitration lost */ @@ -351,7 +352,8 @@ int i2c_pcf_add_bus(struct i2c_adapter *adap) /* register new adapter to i2c module... */ adap->algo = &pcf_algo; - if ((rval = pcf_init_8584(pcf_adap))) + rval = pcf_init_8584(pcf_adap); + if (rval) return rval; rval = i2c_add_adapter(adap); |