diff options
Diffstat (limited to 'drivers/i2c/muxes/i2c-mux-pca9541.c')
| -rw-r--r-- | drivers/i2c/muxes/i2c-mux-pca9541.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/i2c/muxes/i2c-mux-pca9541.c b/drivers/i2c/muxes/i2c-mux-pca9541.c index 8663c8a7c269..3d8002caf703 100644 --- a/drivers/i2c/muxes/i2c-mux-pca9541.c +++ b/drivers/i2c/muxes/i2c-mux-pca9541.c @@ -63,10 +63,6 @@ #define mybus(x) (!((x) & MYBUS) || ((x) & MYBUS) == MYBUS) #define busoff(x) (!((x) & BUSON) || ((x) & BUSON) == BUSON) -/* arbitration timeouts, in jiffies */ -#define ARB_TIMEOUT (HZ / 8) /* 125 ms until forcing bus ownership */ -#define ARB2_TIMEOUT (HZ / 4) /* 250 ms until acquisition failure */ - /* arbitration retry delays, in us */ #define SELECT_DELAY_SHORT 50 #define SELECT_DELAY_LONG 1000 @@ -229,6 +225,9 @@ static int pca9541_arbitrate(struct i2c_client *client) */ data->select_timeout = SELECT_DELAY_LONG; if (time_is_before_eq_jiffies(data->arb_timeout)) { + dev_warn(&client->dev, + "Arbitration timeout on I2C bus, forcing bus ownership\n"); + /* Time is up, take the bus and reset it. */ pca9541_reg_write(client, PCA9541_CONTROL, @@ -251,10 +250,10 @@ static int pca9541_select_chan(struct i2c_mux_core *muxc, u32 chan) struct pca9541 *data = i2c_mux_priv(muxc); struct i2c_client *client = data->client; int ret; - unsigned long timeout = jiffies + ARB2_TIMEOUT; + unsigned long timeout = jiffies + (2 * client->adapter->timeout); /* give up after this time */ - data->arb_timeout = jiffies + ARB_TIMEOUT; + data->arb_timeout = jiffies + client->adapter->timeout; /* force bus ownership after this time */ do { @@ -267,6 +266,7 @@ static int pca9541_select_chan(struct i2c_mux_core *muxc, u32 chan) else msleep(data->select_timeout / 1000); } while (time_is_after_eq_jiffies(timeout)); + dev_warn(&client->dev, "Failed to acquire I2C bus, timed out\n"); return -ETIMEDOUT; } |