kernel.git/drivers/counter/interrupt-cnt.c, branch linux-5.18.y

counter: interrupt-cnt: add counter_push_event()

2022-03-18T13:04:30Z

Add counter_push_event() to notify user space about new pulses Link: https://lore.kernel.org/r/20220203135727.2374052-3-o.rempel@pengutronix.de Signed-off-by: Oleksij Rempel Signed-off-by: William Breathitt Gray Link: https://lore.kernel.org/r/9da3460113b5092e8658e12f23578567aab7cc5f.1647373009.git.vilhelm.gray@gmail.com Signed-off-by: Greg Kroah-Hartman

counter: interrupt-cnt: Convert to new counter registration

2021-12-30T16:44:07Z

This fixes device lifetime issues where it was possible to free a live struct device. Fixes: a55ebd47f21f ("counter: add IRQ or GPIO based counter") Reviewed-by: Jonathan Cameron Acked-by: William Breathitt Gray Signed-off-by: Uwe Kleine-König Link: https://lore.kernel.org/r/20211230150300.72196-17-u.kleine-koenig@pengutronix.de Signed-off-by: Greg Kroah-Hartman

counter: interrupt-cnt: Convert to counter_priv() wrapper

2021-12-30T16:44:06Z

This is a straight forward conversion to the new counter_priv() wrapper. Acked-by: Jonathan Cameron Acked-by: William Breathitt Gray Signed-off-by: Uwe Kleine-König Link: https://lore.kernel.org/r/20211230150300.72196-7-u.kleine-koenig@pengutronix.de Signed-off-by: Greg Kroah-Hartman

counter: Internalize sysfs interface code

2021-10-17T09:52:58Z

This is a reimplementation of the Generic Counter driver interface. There are no modifications to the Counter subsystem userspace interface, so existing userspace applications should continue to run seamlessly. The purpose of this patch is to internalize the sysfs interface code among the various counter drivers into a shared module. Counter drivers pass and take data natively (i.e. u8, u64, etc.) and the shared counter module handles the translation between the sysfs interface and the device drivers. This guarantees a standard userspace interface for all counter drivers, and helps generalize the Generic Counter driver ABI in order to support the Generic Counter chrdev interface (introduced in a subsequent patch) without significant changes to the existing counter drivers. Note, Counter device registration is the same as before: drivers populate a struct counter_device with components and callbacks, then pass the structure to the devm_counter_register function. However, what's different now is how the Counter subsystem code handles this registration internally. Whereas before callbacks would interact directly with sysfs data, this interaction is now abstracted and instead callbacks interact with native C data types. The counter_comp structure forms the basis for Counter extensions. The counter-sysfs.c file contains the code to parse through the counter_device structure and register the requested components and extensions. Attributes are created and populated based on type, with respective translation functions to handle the mapping between sysfs and the counter driver callbacks. The translation performed for each attribute is straightforward: the attribute type and data is parsed from the counter_attribute structure, the respective counter driver read/write callback is called, and sysfs I/O is handled before or after the driver read/write function is called. Cc: Jarkko Nikula Cc: Patrick Havelange Cc: Kamel Bouhara Cc: Maxime Coquelin Cc: Alexandre Torgue Cc: Dan Carpenter Acked-by: Syed Nayyar Waris Reviewed-by: David Lechner Tested-by: David Lechner Signed-off-by: William Breathitt Gray Reviewed-by: Fabrice Gasnier # for stm32 Link: https://lore.kernel.org/r/c68b4a1ffb195c1a2f65e8dd5ad7b7c14e79c6ef.1630031207.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron

counter: Rename counter_count_function to counter_function

2021-08-09T19:17:36Z

The phrase "Counter Count function" is verbose and unintentionally implies that function is a Count extension. This patch adjusts the Counter subsystem code to use the more direct "Counter function" phrase to make the intent of this code clearer. Cc: Jarkko Nikula Cc: Patrick Havelange Cc: Oleksij Rempel Cc: Kamel Bouhara Cc: Maxime Coquelin Cc: Alexandre Torgue Cc: David Lechner Acked-by: Syed Nayyar Waris Reviewed-by: Fabrice Gasnier Signed-off-by: William Breathitt Gray Link: https://lore.kernel.org/r/8268c54d6f42075a19bb08151a37831e22652499.1627990337.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron

counter: Rename counter_signal_value to counter_signal_level

2021-08-09T19:17:36Z

Signal values will always be levels so let's be explicit it about it to make the intent of the code clear. Cc: Oleksij Rempel Cc: Kamel Bouhara Acked-by: Syed Nayyar Waris Reviewed-by: David Lechner Signed-off-by: William Breathitt Gray Link: https://lore.kernel.org/r/3f17010abe2415859cea9a5fddabd3c97f635ff5.1627990337.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron

counter: Standardize to ERANGE for limit exceeded errors

2021-08-09T19:17:36Z

ERANGE is a semantically better error code to return when an argument value falls outside the supported limit range of a device. Cc: Jarkko Nikula Cc: Oleksij Rempel Cc: Maxime Coquelin Cc: Alexandre Torgue Acked-by: Syed Nayyar Waris Reviewed-by: David Lechner Reviewed-by: Fabrice Gasnier Signed-off-by: William Breathitt Gray Link: https://lore.kernel.org/r/ae8d3b20b8b02c96b1c9898ffa2f9fa5d99edc81.1627990337.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron

counter: interrupt-cnt: Add const qualifier for actions_list array

2021-06-13T16:00:18Z

The struct counter_synapse actions_list member expects a const enum counter_synapse_action array. This patch renames interrupt_cnt_synapse_actionss to interrupt_cnt_synapse_actions and adds a const qualifier to match actions_list. Cc: Oleksij Rempel Signed-off-by: William Breathitt Gray Reviewed-by: Link: https://lore.kernel.org/r/20210610013642.149961-1-vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron

counter: interrupt-cnt: Add const qualifier for functions_list array

2021-06-09T15:21:30Z

The struct counter_count functions_list member expects a const enum counter_count_function array. This patch adds the const qualifier to the interrupt__cnt_functions to match functions_list. Cc: Oleksij Rempel Signed-off-by: William Breathitt Gray Link: https://lore.kernel.org/r/86f7fb77f703cf2508a6b4ee9cf80aa523392976.1623201081.git.vilhelm.gray@gmail.com Signed-off-by: Jonathan Cameron

counter: add IRQ or GPIO based counter

2021-03-25T19:13:51Z

Add simple IRQ or GPIO base counter. This device is used to measure rotation speed of some agricultural devices, so no high frequency on the counter pin is expected. The maximal measurement frequency depends on the CPU and system load. On the idle iMX6S I was able to measure up to 20kHz without count drops. Signed-off-by: Oleksij Rempel Reviewed-by: Ahmad Fatoum Reviewed-by: William Breathitt Gray Link: https://lore.kernel.org/r/20210301080401.22190-3-o.rempel@pengutronix.de Signed-off-by: Jonathan Cameron