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| author | Jean Delvare <khali@linux-fr.org> | 2007-10-16 01:28:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:43:13 -0700 |
| commit | c018664c51aca418e16bc83f75257c68250fb052 (patch) | |
| tree | 7c5578818c136391ff32cac934781c8423ee51e8 /drivers/rtc | |
| parent | a95e23a27b33db5d5f40278b16a42e5e20188015 (diff) | |
| download | kernel-common-c018664c51aca418e16bc83f75257c68250fb052.tar.gz kernel-common-c018664c51aca418e16bc83f75257c68250fb052.tar.bz2 kernel-common-c018664c51aca418e16bc83f75257c68250fb052.zip | |
rtc-pcf8583: Check for i2c adapter functionality
Not all i2c adapters support I2C-level messaging. Check that the adapter
does before probing for a PCF8583 chip, as the driver makes use of
i2c_transfer and i2c_master_send.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-pcf8583.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-pcf8583.c b/drivers/rtc/rtc-pcf8583.c index d48b03374586..556d0e7da35b 100644 --- a/drivers/rtc/rtc-pcf8583.c +++ b/drivers/rtc/rtc-pcf8583.c @@ -332,6 +332,9 @@ static int pcf8583_probe(struct i2c_adapter *adap, int addr, int kind) } }; + if (!i2c_check_functionality(adap, I2C_FUNC_I2C)) + return 0; + pcf = kzalloc(sizeof(*pcf), GFP_KERNEL); if (!pcf) return -ENOMEM; |