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

This reverts commit 6427f5a0de26b7bb8bc2f80f7453833f828fb0a8. 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 <cerg2010cerg2010@mail.ru>
Fixes: 6427f5a0de26 ("i2c: algo-bit: init the bus to a known state")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: Sergey Larin <cerg2010cerg2010@mail.ru>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org

diff --git a/drivers/i2c/algos/i2c-algo-bit.c b/drivers/i2c/algos/i2c-algo-bit.c
index 4a34f311e1ff4df2cd6cdfcff7ea1662c95a06eb..0c0eb16d710ff57d72f8a42210f7500b2fd0c458 100644 (file)
--- 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;