Revert "i2c: algo-bit: init the bus to a known state"

This reverts commit 3e5f06b. As per bugzilla #200045, this caused a regression. I don't really see a way to fix it without having the hardware. So, revert the patch and I will fix the issue I was seeing originally in the i2c-gpio driver itself. I couldn't find new users of this algorithm since, so there should be no one depending on the new behaviour. Reported-by: Sergey Larin <[email protected]> Fixes: 3e5f06b ("i2c: algo-bit: init the bus to a known state") Signed-off-by: Wolfram Sang <[email protected]> Acked-by: Alex Deucher <[email protected]> Tested-by: Sergey Larin <[email protected]> Signed-off-by: Wolfram Sang <[email protected]> Cc: [email protected]
chewitt · Jun 29, 2018 · 2a2c8ee · 2a2c8ee
1 parent 7daf201
commit 2a2c8ee
Showing 1 changed file with 0 additions and 5 deletions.
diff --git a/drivers/i2c/algos/i2c-algo-bit.c b/drivers/i2c/algos/i2c-algo-bit.c
@@ -647,11 +647,6 @@ static int __i2c_bit_add_bus(struct i2c_adapter *adap,
 	if (bit_adap->getscl == NULL)
 		adap->quirks = &i2c_bit_quirk_no_clk_stretch;
 
-	/* Bring bus to a known state. Looks like STOP if bus is not free yet */
-	setscl(bit_adap, 1);
-	udelay(bit_adap->udelay);
-	setsda(bit_adap, 1);
-
 	ret = add_adapter(adap);
 	if (ret < 0)
 		return ret;