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| author |   Wolfram Sang <wsa+renesas@sang-engineering.com> | 2018-06-16 22:37:56 +0900 |
|---|---|---|
| committer |   Wolfram Sang <wsa@the-dreams.de> | 2018-06-29 08:19:41 +0200 |
| commit | 2a2c8ee2d72c4f1ba0f7fbb02dc74f971df0f934 (patch) | |
| tree | 354f04ab5ce215d3ea0e4aabca8ae5c14c82958c /drivers/i2c | |
| parent | Linux 4.18-rc2 (diff) | |
| download | linux-dev-2a2c8ee2d72c4f1ba0f7fbb02dc74f971df0f934.tar.xz linux-dev-2a2c8ee2d72c4f1ba0f7fbb02dc74f971df0f934.zip | |
Revert "i2c: algo-bit: init the bus to a known state"
This reverts commit 3e5f06bed72fe72166a6778f630241a893f67799. 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: 3e5f06bed72f ("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
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/algos/i2c-algo-bit.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/drivers/i2c/algos/i2c-algo-bit.c b/drivers/i2c/algos/i2c-algo-bit.c index 4a34f311e1ff..0c0eb16d710f 100644 --- 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; |