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 <[email protected]>
---
drivers/i2c/busses/i2c-sis630.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/i2c/busses/i2c-sis630.c b/drivers/i2c/busses/i2c-sis630.c
index df8e20a..3124d80 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));
--
1.7.12.4
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