diff options
Diffstat (limited to 'drivers/i2c')
-rw-r--r-- | drivers/i2c/algos/i2c-algo-pca.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/i2c/algos/i2c-algo-pca.c b/drivers/i2c/algos/i2c-algo-pca.c index 6318f7ddc1d4..78d42aae0089 100644 --- a/drivers/i2c/algos/i2c-algo-pca.c +++ b/drivers/i2c/algos/i2c-algo-pca.c | |||
@@ -287,10 +287,21 @@ static int pca_xfer(struct i2c_adapter *i2c_adap, | |||
287 | 287 | ||
288 | case 0x30: /* Data byte in I2CDAT has been transmitted; NOT ACK has been received */ | 288 | case 0x30: /* Data byte in I2CDAT has been transmitted; NOT ACK has been received */ |
289 | DEB2("NOT ACK received after data byte\n"); | 289 | DEB2("NOT ACK received after data byte\n"); |
290 | pca_stop(adap); | ||
290 | goto out; | 291 | goto out; |
291 | 292 | ||
292 | case 0x38: /* Arbitration lost during SLA+W, SLA+R or data bytes */ | 293 | case 0x38: /* Arbitration lost during SLA+W, SLA+R or data bytes */ |
293 | DEB2("Arbitration lost\n"); | 294 | DEB2("Arbitration lost\n"); |
295 | /* | ||
296 | * The PCA9564 data sheet (2006-09-01) says "A | ||
297 | * START condition will be transmitted when the | ||
298 | * bus becomes free (STOP or SCL and SDA high)" | ||
299 | * when the STA bit is set (p. 11). | ||
300 | * | ||
301 | * In case this won't work, try pca_reset() | ||
302 | * instead. | ||
303 | */ | ||
304 | pca_start(adap); | ||
294 | goto out; | 305 | goto out; |
295 | 306 | ||
296 | case 0x58: /* Data byte has been received; NOT ACK has been returned */ | 307 | case 0x58: /* Data byte has been received; NOT ACK has been returned */ |