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| author |   Wolfram Sang <wsa+renesas@sang-engineering.com> | 2018-06-16 22:37:57 +0900 |
|---|---|---|
| committer |   Wolfram Sang <wsa@the-dreams.de> | 2018-06-29 08:19:51 +0200 |
| commit | 2173ed0adc7f0473e6b6ad636d8684a0d82da5e9 (patch) | |
| tree | 89aa50ce9c4c0bb0132b47801711dcd8294127c3 /drivers/i2c | |
| parent | Revert "i2c: algo-bit: init the bus to a known state" (diff) | |
| download | linux-dev-2173ed0adc7f0473e6b6ad636d8684a0d82da5e9.tar.xz linux-dev-2173ed0adc7f0473e6b6ad636d8684a0d82da5e9.zip | |
i2c: algos: bit: mention our experience about initial states
So, if somebody wants to re-implement this in the future, we pinpoint to
a problem case.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/algos/i2c-algo-bit.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/i2c/algos/i2c-algo-bit.c b/drivers/i2c/algos/i2c-algo-bit.c index 0c0eb16d710f..6ec65adaba49 100644 --- a/drivers/i2c/algos/i2c-algo-bit.c +++ b/drivers/i2c/algos/i2c-algo-bit.c @@ -647,6 +647,11 @@ static int __i2c_bit_add_bus(struct i2c_adapter *adap, if (bit_adap->getscl == NULL) adap->quirks = &i2c_bit_quirk_no_clk_stretch; + /* + * We tried forcing SCL/SDA to an initial state here. But that caused a + * regression, sadly. Check Bugzilla #200045 for details. + */ + ret = add_adapter(adap); if (ret < 0) return ret; |