diff options
Diffstat (limited to 'drivers/media/video/gspca/m5602/m5602_core.c')
| -rw-r--r-- | drivers/media/video/gspca/m5602/m5602_core.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/media/video/gspca/m5602/m5602_core.c b/drivers/media/video/gspca/m5602/m5602_core.c index 1aac2985fee..93302f31aa6 100644 --- a/drivers/media/video/gspca/m5602/m5602_core.c +++ b/drivers/media/video/gspca/m5602/m5602_core.c @@ -80,6 +80,16 @@ int m5602_write_bridge(struct sd *sd, u8 address, u8 i2c_data) return (err < 0) ? err : 0; } +int m5602_wait_for_i2c(struct sd *sd) +{ + int err; + u8 data; + do { + err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, &data); + } while ((data & I2C_BUSY) && !err); + return (err < 0) ? err : 0; +} + int m5602_read_sensor(struct sd *sd, const u8 address, u8 *i2c_data, const u8 len) { @@ -88,9 +98,7 @@ int m5602_read_sensor(struct sd *sd, const u8 address, if (!len || len > sd->sensor->i2c_regW) return -EINVAL; - do { - err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data); - } while ((*i2c_data & I2C_BUSY) && !err); + err = m5602_wait_for_i2c(sd); if (err < 0) return err; @@ -118,6 +126,10 @@ int m5602_read_sensor(struct sd *sd, const u8 address, } for (i = 0; (i < len) && !err; i++) { + err = m5602_wait_for_i2c(sd); + if (err < 0) + return err; + err = m5602_read_bridge(sd, M5602_XB_I2C_DATA, &(i2c_data[i])); PDEBUG(D_CONF, "Reading sensor register " |