[PATCH 2/2] dm: i2c-gpio: add support for clock stretching

Heiko Schocher hs at denx.de
Tue Feb 18 08:20:28 CET 2020

Hello Michael,

Am 07.02.2020 um 17:55 schrieb Michael Auchter:
> This adds support for clock stretching to the i2c-gpio driver. This is
> accomplished by switching the GPIO used for the SCL line to an input
> when it should be driven high, and polling on the SCL line value until
> it goes high (indicating that the I2C slave is no longer pulling it
> low).
> This is enabled by default; for gpios which cannot be configured as
> inputs, the i2c-gpio,scl-output-only property can be used to fall back
> to the previous behavior.
> Signed-off-by: Michael Auchter <michael.auchter at ni.com>
> Cc: Heiko Schocher <hs at denx.de>
> ---
>   doc/device-tree-bindings/i2c/i2c-gpio.txt |  2 ++
>   drivers/i2c/i2c-gpio.c                    | 23 ++++++++++++++++++++++-
>   2 files changed, 24 insertions(+), 1 deletion(-)

Reviewed-by: Heiko Schocher <hs at denx.de>

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-52   Fax: +49-8142-66989-80   Email: hs at denx.de

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