This series adds support for rotary-encoder on AM335x-ICE that is connected to TI PCA9536 I2C GPIO expander. The rotary encoder is different from the incremental encoders in the sense that GPIO line status directly reflect the position(number) pointed by the dial of the encoder. So, there is no need to count steps or know the direction of rotation. Patch 1/2 adds DT property "rotary-encoder,absolute-encoder" to support this encoder. Since, such encoders do not actually require IRQ lines (as the encoder state can always be known by reading GPIO lines at that moment), support for polling based input is added. The second patch adds DT entry for the rotary-encoder present on AM335x ICE board. Tested on AM335x ICE board that has above described rotary-encoder without IRQs (polling mode). I don't have hardware with incremental encoder or encoder with IRQ, please give it a spin on incremental encoders for sanity. Vignesh R (2): Input: rotary-encoder- Add support for absolute encoder ARM: dts: am335x-icev2: Add rotary-encoder node .../devicetree/bindings/input/rotary-encoder.txt | 4 + Documentation/input/rotary-encoder.txt | 9 ++ arch/arm/boot/dts/am335x-icev2.dts | 11 ++ drivers/input/misc/Kconfig | 11 ++ drivers/input/misc/rotary_encoder.c | 165 ++++++++++++++++----- 5 files changed, 166 insertions(+), 34 deletions(-) -- 2.8.2 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
