kernel/linux.git/drivers/input/touchscreen/ads7846.c, branch v6.1.44

spi: make remove callback a void function

2022-02-09T13:00:45+00:00

The value returned by an spi driver's remove function is mostly ignored. (Only an error message is printed if the value is non-zero that the error is ignored.) So change the prototype of the remove function to return no value. This way driver authors are not tempted to assume that passing an error to the upper layer is a good idea. All drivers are adapted accordingly. There is no intended change of behaviour, all callbacks were prepared to return 0 before. Signed-off-by: Uwe Kleine-König Acked-by: Marc Kleine-Budde Acked-by: Andy Shevchenko Reviewed-by: Geert Uytterhoeven Acked-by: Jérôme Pouiller Acked-by: Miquel Raynal Acked-by: Jonathan Cameron Acked-by: Claudius Heine Acked-by: Stefan Schmidt Acked-by: Alexandre Belloni Acked-by: Ulf Hansson # For MMC Acked-by: Marcus Folkesson Acked-by: Łukasz Stelmach Acked-by: Lee Jones Link: https://lore.kernel.org/r/20220123175201.34839-6-u.kleine-koenig@pengutronix.de Signed-off-by: Mark Brown

Input: ads7846 - do not attempt IRQ workaround when deferring probe

2021-10-16T05:09:48+00:00

When request_irq() returns -EPORBE_DEFER we should abort probe and try again later instead of trying to engage IRQ trigger workaround. Link: https://lore.kernel.org/r/20210910045039.4020199-3-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov

Input: ads7846 - use input_set_capability()

2021-10-16T05:09:48+00:00

Instead of manipulating capability bits directly use input_set_capability(). Also stop setting EV_ABS explicitly as input_set_abs_params() does it for us. Link: https://lore.kernel.org/r/20210910045039.4020199-2-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov

Input: ads7846 - set input device bus type and product ID

2021-10-16T05:09:48+00:00

Set input device's bus type as BUS_SPI and use model as product ID. Link: https://lore.kernel.org/r/20210910045039.4020199-1-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov

Input: ads7846 - switch to devm initialization

2021-09-10T04:30:02+00:00

This simplies the code a lot and fixes some potential resource leaks in the error return paths. Signed-off-by: Daniel Mack Link: https://lore.kernel.org/r/20210907200726.2034962-4-daniel@zonque.org Signed-off-by: Dmitry Torokhov

Input: ads7846 - remove custom filter handling functions from pdata

2021-09-10T04:30:01+00:00

The functions in the platform data struct to initialize, cleanup and apply custom filters are not in use by any mainline board. Remove support for them to pave the road for more cleanups to come. The enum was moved as it has no users outside of the driver code itself. Signed-off-by: Daniel Mack Reviewed-by: Marco Felsch Link: https://lore.kernel.org/r/20210907200726.2034962-3-daniel@zonque.org Signed-off-by: Dmitry Torokhov

Input: ads7846 - add short-hand for spi->dev in probe() function

2021-09-10T04:29:59+00:00

This will make the code a bit more terse. No functional change intended. Signed-off-by: Daniel Mack Reviewed-by: Marco Felsch Link: https://lore.kernel.org/r/20210907200726.2034962-2-daniel@zonque.org Signed-off-by: Dmitry Torokhov

Merge tag 'v5.11' into next

2021-02-23T05:21:03+00:00

Merge with mainline to get latest APIs and device tree bindings.

Input: ads7846 - convert to one message

2021-01-21T07:21:54+00:00

Convert multiple full duplex transfers in to a single transfer to reduce CPU load. Current driver version support following filtering modes: - ads7846_no_filter() - not filtered - ads7846_debounce_filter() - driver specific debounce filter - pdata->filter - platform specific debounce filter (do any platform provides such filter?) Without filter this HW is not really usable, since the physic of resistive touchscreen can provide some bounce effects. With driver internal filter, we have constant amount of retries + debounce retries if some anomaly was detected. High amount of tiny SPI transfers is the primer reason of high CPU load and interrupt frequency. This patch create one SPI transfer with all fields and not optional retires. If bounce anomaly was detected, we will make more transfer if needed. Without this patch, we will get about 10% CPU load on iMX6S on pen-down event. For example by holding stylus on the screen. With this patch, depending in the amount of retries, the CPU load will be 1% with "ti,debounce-rep = <3>". One buffer transfer allows us to use PIO FIFO or DMA engine, depending on the platform. Signed-off-by: Oleksij Rempel Link: https://lore.kernel.org/r/20201110085041.16303-3-o.rempel@pengutronix.de Signed-off-by: Dmitry Torokhov

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

2020-12-16T00:18:23+00:00

Pull input updates from Dmitry Torokhov: - support for inhibiting input devices at request from userspace. If a device implements open/close methods, it can also put device into low power state. This is needed, for example, to disable keyboard and touchpad on convertibles when they are transitioned into tablet mode - now that ordinary input devices can be configured for polling mode, dedicated input polling device implementation has been removed - GTCO tablet driver has been removed, as it used problematic custom HID parser, devices are EOL, and there is no interest from the manufacturer - a new driver for Dialog DA7280 haptic chips has been introduced - a new driver for power button on Dell Wyse 3020 - support for eKTF2132 in ektf2127 driver - support for SC2721 and SC2730 in sc27xx-vibra driver - enhancements for Atmel touchscreens, AD7846 touchscreens, Elan touchpads, ADP5589, ST1232 touchscreen, TM2 touchkey drivers - fixes and cleanups to allow clean builds with W=1 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (86 commits) Input: da7280 - fix spelling mistake "sequemce" -> "sequence" Input: cyapa_gen6 - fix out-of-bounds stack access Input: sc27xx - add support for sc2730 and sc2721 dt-bindings: input: Add compatible string for SC2721 and SC2730 dt-bindings: input: Convert sc27xx-vibra.txt to json-schema Input: stmpe - add axis inversion and swapping capability Input: adp5589-keys - do not explicitly control IRQ for wakeup Input: adp5589-keys - do not unconditionally configure as wakeup source Input: ipx4xx-beeper - convert comma to semicolon Input: parkbd - convert comma to semicolon Input: new da7280 haptic driver dt-bindings: input: Add document bindings for DA7280 MAINTAINERS: da7280 updates to the Dialog Semiconductor search terms Input: elantech - fix protocol errors for some trackpoints in SMBus mode Input: elan_i2c - add new trackpoint report type 0x5F Input: elants - document some registers and values Input: atmel_mxt_ts - simplify the return expression of mxt_send_bootloader_cmd() Input: imx_keypad - add COMPILE_TEST support Input: applespi - use new structure for SPI transfer delays Input: synaptics-rmi4 - use new structure for SPI transfer delays ...