linux-kernel - [PATCH/RFT 0/6] i2c: recovery: fix GPIO usage for recovery

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Date:   Fri, 13 Jul 2018 23:09:12 +0200
From:   Wolfram Sang <wsa+renesas@...g-engineering.com>
To:     linux-i2c@...r.kernel.org
Cc:     linux-renesas-soc@...r.kernel.org, kernel@...gutronix.de,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH/RFT 0/6] i2c: recovery: fix GPIO usage for recovery

I have sent the last patch of this series before, but then I realized I need to
convert all users of GPIO recovery before. I needed to make sure they all set
the SDA GPIO to output, this is what patches 3-5 are doing. Which is also good
for them because then they can send STOP at apropriate places when doing
recovery.

Then, I noticed that two drivers were not using the open drain mode for SCL
which seems like a bug to me. So, patches 1+2 address that. I'd think those two
are stable material.

Due to no hardware, I could only build test these patches. I'd be really
looking forward to comments or tests of these patches.

A branch can be found here:

git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git renesas/i2c/recovery-sda-output

Thanks,

   Wolfram

Wolfram Sang (6):
  i2c: designware: use open drain for recovery GPIO
  i2c: imx: use open drain for recovery GPIO
  i2c: designware: set SDA as output for recovery
  i2c: davinci: set SDA as output for recovery
  i2c: imx: set SDA as output for recovery
  i2c: recovery: remove bogus check if SDA GPIO is set to output

 drivers/i2c/busses/i2c-davinci.c           | 3 ++-
 drivers/i2c/busses/i2c-designware-master.c | 4 ++--
 drivers/i2c/busses/i2c-imx.c               | 4 ++--
 drivers/i2c/i2c-core-base.c                | 4 +---
 4 files changed, 7 insertions(+), 8 deletions(-)

-- 
2.11.0