On Sun, Sep 01, 2019 at 05:58:21PM -0500, David Lechner wrote:
> This series adds device tree bindings and a new counter driver for the Texas
> Instruments Enhanced Quadrature Encoder Pulse (eQEP).
>
> As mentioned in one of the commit messages, to start with, the driver only
> supports reading the current counter value and setting the min/max values.
> Other features can be added as the counter subsystem gains support for them.
>
> v3 changes:
> - Minor changes to device tree bindings (style and generic node name)
> - Drop action in initializer
> - Fix ordering of pm runtime disable
> v2 changes:
> - New patch to move TI PWMSS driver from drivers/pwm/ to drivers/bus/
> - Device tree bindings converted to .yaml format
> - Device tree clock renamed from "fck" to "sysclkout"
> - Dropped unused index and strobe signals from counter driver
> - Added synapses and actions to counter driver
> - Fixed base in of kstrtouint()
> - Clarifications in commit messages
>
> This series has been tested on a BeagleBone Blue with the following script:
>
> #!/usr/bin/env python3
>
> from os import path
> from time import sleep
>
> COUNTER_PATH = '/sys/bus/counter/devices'
> COUNTERS = ['counter0', 'counter1', 'counter2']
> COUNT0 = 'count0'
> COUNT = 'count'
> FUNCTION = 'function'
> CEILING = 'ceiling'
> FLOOR = 'floor'
> ENABLE = 'enable'
>
> cnts = []
>
> for c in COUNTERS:
> function_path = path.join(COUNTER_PATH, c, COUNT0, FUNCTION)
> with open(function_path, 'w') as f:
> f.write('quadrature x4')
> floor_path = path.join(COUNTER_PATH, c, COUNT0, FLOOR)
> with open(floor_path, 'w') as f:
> f.write(str(0))
> ceiling_path = path.join(COUNTER_PATH, c, COUNT0, CEILING)
> with open(ceiling_path, 'w') as f:
> f.write(str(0xffffffff))
> enable_path = path.join(COUNTER_PATH, c, COUNT0, ENABLE)
> with open(enable_path, 'w') as f:
> f.write('1')
>
> cnt_path = path.join(COUNTER_PATH, c, COUNT0, COUNT)
> cnts.append(open(cnt_path, 'r'))
>
> while True:
> for c in cnts:
> c.seek(0)
> val = int(c.read())
> if val >= 0x80000000:
> val -= 0x100000000
> print(val, end=' ')
> print()
> sleep(1)
>
> David Lechner (6):
> bus/ti-pwmss: move TI PWMSS driver from PWM to bus subsystem
> dt-bindings: counter: new bindings for TI eQEP
> counter: new TI eQEP driver
> ARM: dts: am33xx: Add nodes for eQEP
> ARM: dts: am335x-boneblue: Enable eQEP
> ARM: dts: am335x-boneblue: Use of am335x-osd335x-common.dtsi
>
> .../devicetree/bindings/counter/ti-eqep.yaml | 50 ++
> MAINTAINERS | 6 +
> arch/arm/boot/dts/am335x-boneblue.dts | 146 +++---
> arch/arm/boot/dts/am33xx-l4.dtsi | 27 +
> drivers/bus/Kconfig | 9 +
> drivers/bus/Makefile | 1 +
> drivers/{pwm/pwm-tipwmss.c => bus/ti-pwmss.c} | 0
> drivers/counter/Kconfig | 11 +
> drivers/counter/Makefile | 1 +
> drivers/counter/ti-eqep.c | 473 ++++++++++++++++++
> drivers/pwm/Kconfig | 9 -
> drivers/pwm/Makefile | 1 -
> 12 files changed, 634 insertions(+), 100 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/counter/ti-eqep.yaml
> rename drivers/{pwm/pwm-tipwmss.c => bus/ti-pwmss.c} (100%)
> create mode 100644 drivers/counter/ti-eqep.c
>
> --
> 2.17.1
I'm satisfied with this version of the patchset.
Signed-off-by: William Breathitt Gray <vilhelm.gray@xxxxxxxxx>
Jonathan, if you have no objections please pick up this up so that it
can make it to the 5.4 merge window coming in soon. Alternatively, I can
merge it into my repository instead and hold it for a while longer
there, if you prefer that route.
Thank you,
William Breathitt Gray
