[PATCH v4 0/3] Add the clock stretching i2c property

Andi Shyti
2023-03-14T21:58:07Z

Hello,

fter a discussion between Krzysztof and Ryan[1], it has become
apparent that the i2c binding is lacking the definition of a
property that needs to be added at a more generic level. This
property is also used by the mpc i2c controller, which has been
updated in the second patch.

The DTS schema change has been sent as github pull reqest[2][3].

Thanks Krzysztof and Chris for the reviews.

Thank you,
Andi

[1] https://lore.kernel.org/all/c41ee6b5-ddb4-1253-de54-a295b3bab2cc@linaro.org/
[2] https://github.com/devicetree-org/dt-schema/pull/102
[3] https://github.com/devicetree-org/dt-schema/pull/103

Changelog
=========
v3 -> v4:
- Replaced "i2c-scl-clk-low-timeout-ms" with
"i2c-scl-clk-low-timeout-us". Use microseconds instead of
milliseconds.
- Add tags from Chris.

v2 -> v3:
- Chris recommended to use of_property_read_u32() instead of
of_get_property(). Because there were two use of it I added
the suggested cleanup in a separate patch.

v1 -> v2:
- Removed the binding patch and send through a different channel
- To ensure back compatibility, which was broken in v1, the
legacy "fsl,timeout" has not been removed and marked as
deprecated. In the driver the that property is checked anyway
as a fallback in case the main i2c-scl-clk-low-timeout-ms is
missing.

Andi Shyti (3):
dt-bindings: i2c: mpc: Mark "fsl,timeout" as deprecated
i2c: mpc: Use of_property_read_u32 instead of of_get_property
i2c: mpc: Use i2c-scl-clk-low-timeout-ms i2c property

.../devicetree/bindings/i2c/i2c-mpc.yaml | 3 +-
drivers/i2c/busses/i2c-mpc.c | 35 ++++++++++++-------
2 files changed, 25 insertions(+), 13 deletions(-)

--
2.39.2