On Wed, Sep 11, 2019 at 10:24:14AM +0200, Eugen Hristev - M18282 wrote: > From: Eugen Hristev <eugen.hristev@xxxxxxxxxxxxx> > > 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 later > [PATCH v4 0/9] i2c: add support for filters > and enhanced to add the bindings for all controllers plus an extra bindings > for the width of the spikes in nanoseconds (digital filters) and cut-off > frequency (analog filters) > > First, bindings are created for > 'i2c-analog-filter' > 'i2c-digital-filter' > 'i2c-digital-filter-width-ns' > 'i2c-analog-filter-cutoff-frequency' > > The support is added in the i2c core to retrieve filter width/cutoff frequency > 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 v5: > - renamed i2c-filter-width-ns to i2c-digital-filter-width-ns as this > is applicable only to digital filter > - created new binding i2c-digital-filter-width-ns for analog filters. Acked-by: Ludovic Desroches <ludovic.desroches@xxxxxxxxxxxxx> for at91 stuff. You can keep it for the future if needed as long as changes mainly concerned the generic binding. Regards Ludovic > > Changes in v4: > - renamed i2c-ana-filter to i2c-analog-filter > - renamed i2c-dig-filter to i2c-digital-filter > > 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 filters optional properties > 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 digital filter for i2c > > Documentation/devicetree/bindings/i2c/i2c-at91.txt | 3 +- > Documentation/devicetree/bindings/i2c/i2c.txt | 18 ++++++++ > 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 | 6 +++ > include/linux/i2c.h | 6 +++ > 9 files changed, 136 insertions(+), 4 deletions(-) > > -- > 2.7.4 >
