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| author | Jean Delvare <khali@linux-fr.org> | 2010-08-11 20:21:00 +0400 |
|---|---|---|
| committer | Jean Delvare <khali@linux-fr.org> | 2010-08-11 20:21:00 +0400 |
| commit | 8031d79baedabd44590d047d97a310eb0e0e4e0c (patch) | |
| tree | 1ddc3e78c880fdfbcb2377f2f41ff1b9a797731b /drivers/i2c/i2c-core.c | |
| parent | d6703281ff20df6c2c0ea7c39a0cc2fa8be3e680 (diff) | |
| download | linux-8031d79baedabd44590d047d97a310eb0e0e4e0c.tar.xz | |
i2c: Make i2c_default_probe self-sufficient
Make i2c_default_probe self-sufficient, so that callers don't have to
do functionality checks themselves. This ensures everything is and
will stay consistent.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/i2c/i2c-core.c')
| -rw-r--r-- | drivers/i2c/i2c-core.c | 32 |
1 files changed, 10 insertions, 22 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index bb02f8e21a3b..ba86af63f5cf 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -1378,13 +1378,17 @@ static int i2c_default_probe(struct i2c_adapter *adap, unsigned short addr) I2C_SMBUS_BYTE_DATA, &dummy); else #endif - if ((addr & ~0x07) == 0x30 || (addr & ~0x0f) == 0x50 - || !i2c_check_functionality(adap, I2C_FUNC_SMBUS_QUICK)) - err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_READ, 0, - I2C_SMBUS_BYTE, &dummy); - else + if (!((addr & ~0x07) == 0x30 || (addr & ~0x0f) == 0x50) + && i2c_check_functionality(adap, I2C_FUNC_SMBUS_QUICK)) err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_WRITE, 0, I2C_SMBUS_QUICK, NULL); + else if (i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_BYTE)) + err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_READ, 0, + I2C_SMBUS_BYTE, &dummy); + else { + dev_warn(&adap->dev, "No suitable probing method supported\n"); + err = -EOPNOTSUPP; + } return err >= 0; } @@ -1465,16 +1469,6 @@ static int i2c_detect(struct i2c_adapter *adapter, struct i2c_driver *driver) if (!(adapter->class & driver->class)) goto exit_free; - /* Stop here if the bus doesn't support probing */ - if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_READ_BYTE)) { - if (address_list[0] == I2C_CLIENT_END) - goto exit_free; - - dev_warn(&adapter->dev, "Probing not supported\n"); - err = -EOPNOTSUPP; - goto exit_free; - } - for (i = 0; address_list[i] != I2C_CLIENT_END; i += 1) { dev_dbg(&adapter->dev, "found normal entry for adapter %d, " "addr 0x%02x\n", adap_id, address_list[i]); @@ -1504,14 +1498,8 @@ i2c_new_probed_device(struct i2c_adapter *adap, { int i; - if (!probe) { - /* Stop here if the bus doesn't support probing */ - if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_BYTE)) { - dev_err(&adap->dev, "Probing not supported\n"); - return NULL; - } + if (!probe) probe = i2c_default_probe; - } for (i = 0; addr_list[i] != I2C_CLIENT_END; i++) { /* Check address validity */ |