linux/drivers/counter, branch v5.8

counter: 104-quad-8: Add lock guards - filter clock prescaler

2020-06-14T13:46:52Z

Add lock protection from race conditions to the 104-quad-8 counter driver for filter clock prescaler code changes. Mutex calls used for protection. Signed-off-by: Syed Nayyar Waris Fixes: de65d0556343 ("counter: 104-quad-8: Support Filter Clock Prescaler") Signed-off-by: Jonathan Cameron

counter: 104-quad-8: Add lock guards - differential encoder

2020-06-14T13:44:32Z

Add lock protection from race conditions to 104-quad-8 counter driver for differential encoder status code changes. Mutex lock calls used for protection. Signed-off-by: Syed Nayyar Waris Fixes: 954ab5cc5f3e ("counter: 104-quad-8: Support Differential Encoder Cable Status") Signed-off-by: Jonathan Cameron

counter: 104-quad-8: Add lock guards - generic interface

2020-04-19T16:50:00Z

Add lock protection from race conditions to 104-quad-8 counter driver generic interface code changes. Mutex calls used for protection. Fixes: f1d8a071d45b ("counter: 104-quad-8: Add Generic Counter interface support") Signed-off-by: Syed Nayyar Waris Signed-off-by: William Breathitt Gray Signed-off-by: Jonathan Cameron

counter: 104-quad-8: Support Differential Encoder Cable Status

2020-03-08T17:28:53Z

The ACCES 104-QUAD-8 series provides status information about the connection state of the differential encoder cable inputs. This patch implements support to expose such information from these devices. Signed-off-by: William Breathitt Gray Signed-off-by: Jonathan Cameron

counter: 104-quad-8: Support Filter Clock Prescaler

2020-03-08T17:28:52Z

The ACCES 104-QUAD-8 series does active filtering on the quadrature input signals via the PC/104 bus clock (OSC 14.318 MHz). This patch exposes the filter clock prescaler available on each channel. Signed-off-by: William Breathitt Gray Signed-off-by: Jonathan Cameron

counter: stm32-timer-cnt: remove iio headers

2020-02-21T10:02:15Z

The stm32-timer-cnt driver doesn't use the iio interface. The iio headers aren't relevant and can be removed as reported by William in [1]. With this change, mod_devicetable.h needs to be added to define the 'of_device_id' struct. [1] https://lkml.org/lkml/2020/2/10/1516 Reported-by: William Breathitt Gray Signed-off-by: Fabrice Gasnier Signed-off-by: Jonathan Cameron

counter: stm32-timer-cnt: add power management support

2020-02-21T10:02:15Z

Add suspend/resume PM sleep ops. When going to low power, enforce the counter isn't active. Gracefully restore its state upon resume in case it's been left enabled prior to suspend. Acked-by: William Breathitt Gray Signed-off-by: Fabrice Gasnier Signed-off-by: Jonathan Cameron

counter: Simplify the count_read and count_write callbacks

2019-10-18T18:47:27Z

The count_read and count_write callbacks are simplified to pass val as unsigned long rather than as an opaque data structure. The opaque counter_count_read_value and counter_count_write_value structures, counter_count_value_type enum, and relevant counter_count_read_value_set and counter_count_write_value_get functions, are removed as they are no longer used. Cc: Patrick Havelange Acked-by: Fabrice Gasnier Acked-by: David Lechner Signed-off-by: William Breathitt Gray Signed-off-by: Jonathan Cameron

Merge branch 'ib-ti-eqep-5.4-rc1' into togreg

2019-10-17T21:08:43Z

Immutable branch being merged in. Created as this also involves moving some dependencies around, outside of the counter subsystem. It's possible it will want to be pulled into other trees.

counter: new TI eQEP driver

2019-10-17T20:53:49Z

This adds a new counter driver for the Texas Instruments Enhanced Quadrature Encoder Pulse (eQEP) module. Only very basic functionality is currently implemented - only enough to be able to read the position. The actual device has many more features which can be added to the driver on an as-needed basis. It is not possible to read the QEPA/B signal values in hardware, so that feature is omitted. The TI_PWMSS kernel option is selected in Kconfig to enable the parent bus, which is needed for power management. Signed-off-by: David Lechner Signed-off-by: Jonathan Cameron