diff options
Diffstat (limited to 'drivers/media/video/em28xx/em28xx-i2c.c')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-i2c.c | 35 |
1 files changed, 26 insertions, 9 deletions
diff --git a/drivers/media/video/em28xx/em28xx-i2c.c b/drivers/media/video/em28xx/em28xx-i2c.c index 97853384c94..3bab56b997f 100644 --- a/drivers/media/video/em28xx/em28xx-i2c.c +++ b/drivers/media/video/em28xx/em28xx-i2c.c @@ -143,10 +143,11 @@ static int em2800_i2c_check_for_device(struct em28xx *dev, unsigned char addr) } for (write_timeout = EM2800_I2C_WRITE_TIMEOUT; write_timeout > 0; write_timeout -= 5) { - unsigned msg = dev->em28xx_read_reg(dev, 0x5); - if (msg == 0x94) + unsigned reg = dev->em28xx_read_reg(dev, 0x5); + + if (reg == 0x94) return -ENODEV; - else if (msg == 0x84) + else if (reg == 0x84) return 0; msleep(5); } @@ -335,8 +336,11 @@ static int em28xx_i2c_eeprom(struct em28xx *dev, unsigned char *eedata, int len) /* Check if board has eeprom */ err = i2c_master_recv(&dev->i2c_client, &buf, 0); - if (err < 0) - return -1; + if (err < 0) { + em28xx_errdev("%s: i2c_master_recv failed! err [%d]\n", + __func__, err); + return err; + } buf = 0; @@ -344,7 +348,7 @@ static int em28xx_i2c_eeprom(struct em28xx *dev, unsigned char *eedata, int len) if (err != 1) { printk(KERN_INFO "%s: Huh, no eeprom present (err=%d)?\n", dev->name, err); - return -1; + return err; } while (size > 0) { if (size > 16) @@ -357,7 +361,7 @@ static int em28xx_i2c_eeprom(struct em28xx *dev, unsigned char *eedata, int len) printk(KERN_WARNING "%s: i2c eeprom read error (err=%d)\n", dev->name, err); - return -1; + return err; } size -= block; p += block; @@ -585,18 +589,31 @@ void em28xx_i2c_call_clients(struct em28xx *dev, unsigned int cmd, void *arg) */ int em28xx_i2c_register(struct em28xx *dev) { + int retval; + BUG_ON(!dev->em28xx_write_regs || !dev->em28xx_read_reg); BUG_ON(!dev->em28xx_write_regs_req || !dev->em28xx_read_reg_req); dev->i2c_adap = em28xx_adap_template; dev->i2c_adap.dev.parent = &dev->udev->dev; strcpy(dev->i2c_adap.name, dev->name); dev->i2c_adap.algo_data = dev; - i2c_add_adapter(&dev->i2c_adap); + + retval = i2c_add_adapter(&dev->i2c_adap); + if (retval < 0) { + em28xx_errdev("%s: i2c_add_adapter failed! retval [%d]\n", + __func__, retval); + return retval; + } dev->i2c_client = em28xx_client_template; dev->i2c_client.adapter = &dev->i2c_adap; - em28xx_i2c_eeprom(dev, dev->eedata, sizeof(dev->eedata)); + retval = em28xx_i2c_eeprom(dev, dev->eedata, sizeof(dev->eedata)); + if (retval < 0) { + em28xx_errdev("%s: em28xx_i2_eeprom failed! retval [%d]\n", + __func__, retval); + return retval; + } if (i2c_scan) em28xx_do_i2c_scan(dev); |