| Message ID | 20190306111208.7454-1-patrick.havelange@essensium.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | FlexTimer Module Quadrature decoder counter | expand |
On Wed, Mar 06, 2019 at 12:12:01PM +0100, Patrick Havelange wrote: > This patch serie is to be applied on top of > https://patchwork.kernel.org/project/linux-iio/list/?series=147 > (a more recent version of the serie is available here : > https://gitlab.com/vilhelmgray/iio/tree/generic_counter_v10 ) > > Main changes in v2: > The code is a bit simpler, thanks to more use of devm_* functions. > The polling/32bit signed version has been dropped, as not needed and > no other driver is doing that. > > > Patrick Havelange (7): > include/fsl: add common FlexTimer #defines in a separate header. > drivers/pwm: pwm-fsl-ftm: use common header for FlexTimer #defines > drivers/clocksource: timer-fsl-ftm: use common header for FlexTimer > #defines > dt-bindings: counter: ftm-quaddec > counter: add FlexTimer Module Quadrature decoder counter driver > counter: ftm-quaddec: Documentation: Add specific counter sysfs > documentation > LS1021A: dtsi: add ftm quad decoder entries > > .../ABI/testing/sysfs-bus-counter-ftm-quaddec | 16 + > .../bindings/counter/ftm-quaddec.txt | 18 + > arch/arm/boot/dts/ls1021a.dtsi | 28 ++ > drivers/clocksource/timer-fsl-ftm.c | 15 +- > drivers/counter/Kconfig | 9 + > drivers/counter/Makefile | 1 + > drivers/counter/ftm-quaddec.c | 356 ++++++++++++++++++ > drivers/pwm/pwm-fsl-ftm.c | 44 +-- > include/linux/fsl/ftm.h | 88 +++++ > 9 files changed, 519 insertions(+), 56 deletions(-) > create mode 100644 Documentation/ABI/testing/sysfs-bus-counter-ftm-quaddec > create mode 100644 Documentation/devicetree/bindings/counter/ftm-quaddec.txt > create mode 100644 drivers/counter/ftm-quaddec.c > create mode 100644 include/linux/fsl/ftm.h > > -- > 2.19.1 Patrick, I see you dropped the polling support in this version. If the need arises in the future, we can discuss a possible ways of resolving your latency issues; I imagine interrupts during overflow/underflow events to be a common behavior among counter devices so those too may result in latency issues as you discovered in your case. Jonathan, If you are satisfied with the changes in this patchset, let me know which patches you like and I'll add respective Reviewed-by tags for you for the next Counter subsystem introduction patchset submission. William Breathitt Gray
This patch serie is to be applied on top of https://patchwork.kernel.org/project/linux-iio/list/?series=147 (a more recent version of the serie is available here : https://gitlab.com/vilhelmgray/iio/tree/generic_counter_v10 ) Main changes in v2: The code is a bit simpler, thanks to more use of devm_* functions. The polling/32bit signed version has been dropped, as not needed and no other driver is doing that. Patrick Havelange (7): include/fsl: add common FlexTimer #defines in a separate header. drivers/pwm: pwm-fsl-ftm: use common header for FlexTimer #defines drivers/clocksource: timer-fsl-ftm: use common header for FlexTimer #defines dt-bindings: counter: ftm-quaddec counter: add FlexTimer Module Quadrature decoder counter driver counter: ftm-quaddec: Documentation: Add specific counter sysfs documentation LS1021A: dtsi: add ftm quad decoder entries .../ABI/testing/sysfs-bus-counter-ftm-quaddec | 16 + .../bindings/counter/ftm-quaddec.txt | 18 + arch/arm/boot/dts/ls1021a.dtsi | 28 ++ drivers/clocksource/timer-fsl-ftm.c | 15 +- drivers/counter/Kconfig | 9 + drivers/counter/Makefile | 1 + drivers/counter/ftm-quaddec.c | 356 ++++++++++++++++++ drivers/pwm/pwm-fsl-ftm.c | 44 +-- include/linux/fsl/ftm.h | 88 +++++ 9 files changed, 519 insertions(+), 56 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-bus-counter-ftm-quaddec create mode 100644 Documentation/devicetree/bindings/counter/ftm-quaddec.txt create mode 100644 drivers/counter/ftm-quaddec.c create mode 100644 include/linux/fsl/ftm.h