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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>
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@ -647,6 +647,11 @@ static int __i2c_bit_add_bus(struct i2c_adapter *adap,
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if (bit_adap->getscl == NULL)
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if (bit_adap->getscl == NULL)
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adap->quirks = &i2c_bit_quirk_no_clk_stretch;
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adap->quirks = &i2c_bit_quirk_no_clk_stretch;
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/*
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* We tried forcing SCL/SDA to an initial state here. But that caused a
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* regression, sadly. Check Bugzilla #200045 for details.
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*/
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ret = add_adapter(adap);
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ret = add_adapter(adap);
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if (ret < 0)
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if (ret < 0)
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return ret;
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return ret;
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