diff options
| author | Amaury Decrême <amaury.decreme@gmail.com> | 2013-01-28 22:21:06 +0100 |
|---|---|---|
| committer | Wolfram Sang <wolfram@the-dreams.de> | 2013-02-11 15:59:38 +0100 |
| commit | aa9e7a39c5a5a77ff02670ef915f4c6712bc7658 (patch) | |
| tree | e236c6a1c0a53ec7ec8782bd1cf2a02cda16a9ca | |
| parent | 974d6a3797001c88e59ccb78567c6d71ac526c43 (diff) | |
| download | linux-stable-aa9e7a39c5a5a77ff02670ef915f4c6712bc7658.tar.gz linux-stable-aa9e7a39c5a5a77ff02670ef915f4c6712bc7658.tar.bz2 linux-stable-aa9e7a39c5a5a77ff02670ef915f4c6712bc7658.zip | |
i2c: sis630: clear sticky bits
The sticky bits must be cleared at the end of the transaction by writing
a 1 to all fields.
Datasheet:
SMBus Status (SMB_STS)
The following registers are all sticky bits and only can be
cleared by writing a one to their corresponding fields.
Signed-off-by: Amaury Decrême <amaury.decreme@gmail.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
| -rw-r--r-- | drivers/i2c/busses/i2c-sis630.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/i2c/busses/i2c-sis630.c b/drivers/i2c/busses/i2c-sis630.c index df8e20ab3a09..3124d807c05a 100644 --- a/drivers/i2c/busses/i2c-sis630.c +++ b/drivers/i2c/busses/i2c-sis630.c @@ -213,10 +213,8 @@ static int sis630_transaction_wait(struct i2c_adapter *adap, int size) static void sis630_transaction_end(struct i2c_adapter *adap, u8 oldclock) { - int temp = 0; - /* clear all status "sticky" bits */ - sis630_write(SMB_STS, temp); + sis630_write(SMB_STS, 0xFF); dev_dbg(&adap->dev, "SMB_CNT before clock restore 0x%02x\n", sis630_read(SMB_CNT)); |