linux-kernel - [PATCH 0/3] i2c: qcom-geni: Make it possible to run i2cdetect

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Date:   Sat, 16 Jul 2022 20:50:24 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Vinod Koul <vkoul@...nel.org>, Wolfram Sang <wsa@...nel.org>
Cc:     linux-arm-msm@...r.kernel.org, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 0/3] i2c: qcom-geni: Make it possible to run i2cdetect

Attempting to run i2cdetect shows that error handling in the GENI I2C driver
could be better.

The first issue is that errors aren't returned from the driver. Following this
is an issue that if a timeout occurs the current operation is aborted, but the
abort code races with the isr so the abort times out as well. Lastly when this
happens, the driver is quite noisy, making it impossible to run i2cdetect on
the serial console.

With this series in place, I was able to run i2cdetect on the db845c and two
sc8180x devices - and get useful output.

Bjorn Andersson (3):
  i2c: qcom-geni: Use the correct return value
  i2c: qcom-geni: Propagate GENI_ABORT_DONE to geni_i2c_abort_xfer()
  i2c: qcom-geni: Silence NACK and GENI_TIMEOUT

 drivers/i2c/busses/i2c-qcom-geni.c | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

-- 
2.35.1