Re: [PATCH v3 0/9] i2c: add support for filters

Ludovic Desroches
2019-07-12T08:21:37Z

On Tue, Jul 09, 2019 at 03:19:26PM +0200, Eugen Hristev - M18282 wrote:
> From: Eugen Hristev <eugen.hristev@microchip.com>
>
> Hello,
>
> This series adds support for analog and digital filters for i2c controllers
>
> This series is based on the series:
> [PATCH v2 0/9] i2c: at91: filters support for at91 SoCs
> and enhanced to add the bindings for all controllers plus an extra binding
> for the width of the spikes in nanoseconds.
>
> First, bindings are created for
> 'i2c-ana-filter'
> 'i2c-dig-filter'
> 'i2c-filter-width-ns'
>
> The support is added in the i2c core to retrieve filter width and add it
> to the timings structure.
> Next, the at91 driver is enhanced for supporting digital filter, advanced
> digital filter (with selectable spike width) and the analog filter.
>
> Finally the device tree for two boards are modified to make use of the
> new properties.
>
> This series is the result of the comments on the ML in the direction
> requested: to make the bindings globally available for i2c drivers.
>
> Changes in v3:
> - made bindings global for i2c controllers and modified accordingly
> - gave up PADFCDF bit because it's a lack in datasheet
> - the computation on the width of the spike is based on periph clock as it
> is done for hold time.
>
> Changes in v2:
> - added device tree bindings and support for enable-ana-filt and
> enable-dig-filt
> - added the new properties to the DT for sama5d4_xplained/sama5d2_xplained
>
> Eugen Hristev (9):
> dt-bindings: i2c: at91: add new compatible
> dt-bindings: i2c: add bindings for i2c analog and digital filter
> i2c: add support for filter-width-ns optional property
> i2c: at91: add new platform support for sam9x60
> i2c: at91: add support for digital filtering
> i2c: at91: add support for advanced digital filtering
> i2c: at91: add support for analog filtering
> ARM: dts: at91: sama5d2_xplained: add analog and digital filter for
> i2c
> ARM: dts: at91: sama5d4_xplained: add analog filter for i2c
>
> Documentation/devicetree/bindings/i2c/i2c-at91.txt | 3 +-
> Documentation/devicetree/bindings/i2c/i2c.txt | 11 +++++
> arch/arm/boot/dts/at91-sama5d2_xplained.dts | 6 +++
> arch/arm/boot/dts/at91-sama5d4_xplained.dts | 1 +
> drivers/i2c/busses/i2c-at91-core.c | 38 +++++++++++++++++
> drivers/i2c/busses/i2c-at91-master.c | 49 ++++++++++++++++++++--
> drivers/i2c/busses/i2c-at91.h | 13 ++++++
> drivers/i2c/i2c-core-base.c | 2 +
> include/linux/i2c.h | 2 +
> 9 files changed, 121 insertions(+), 4 deletions(-)

Hi,

I don't know if it will fit other vendors need concerning the binding
but for Microchip it sounds good.

Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
for the whole serie.

Regards

Ludovic