user/sven/linux.git/drivers/input/touchscreen, branch v4.0.3

Input: sun4i-ts - add thermal driver dependency

2015-03-02T23:15:50Z

The sun4i-ts driver has had a dependency on the thermal code with the addition of the thermal zone sensor support, but this is not currently enforced in Kconfig, so with TOUCHSCREEN_SUN4I=y, THERMAL=m and THERMAL_OF=y we get drivers/built-in.o: In function `sun4i_ts_remove': :(.text+0x2376f4): undefined reference to `thermal_zone_of_sensor_unregister' drivers/built-in.o: In function `sun4i_ts_probe': :(.text+0x237a94): undefined reference to `thermal_zone_of_sensor_register' :(.text+0x237c00): undefined reference to `thermal_zone_of_sensor_unregister' We need the dependency on THERMAL in order to ensure that this driver becomes a loadable module if the thermal support itself is modular, while the dependency on THERMAL_OF is a runtime dependency and the driver will still build if it is missing. It is entirely possible to build sun4i-ts without THERMAL_OF just to use the hwmon sensors and/or touchscreen. Fixes: 223697107949 ("Input: sun4i-ts - add thermal zone sensor support") Signed-off-by: Arnd Bergmann [wens@csie.org: Fix description and Kconfig dependencies] Signed-off-by: Chen-Yu Tsai Signed-off-by: Dmitry Torokhov

Input: ti_am335x_tsc - replace delta filtering with median filtering

2015-02-03T19:50:39Z

Previously, delta filtering was applied TSC co-ordinate readouts before reporting a single value to user space. This patch replaces delta filtering with median filtering. Median filtering sorts co-ordinate readouts, drops min and max values, and reports the average of remaining values. This method is more sensible than delta filtering. Median filtering is applied only if number of readouts is greater than 3 else just average of co-ordinate readouts is reported. Signed-off-by: Vignesh R Signed-off-by: Dmitry Torokhov

Input: ti_am335x_tsc - read charge delay from DT

2015-02-03T19:50:38Z

This patch reads charge delay from tsc DT node and writes to REG_CHARGEDELAY register. If the charge delay is not specified in DT then default value of 0x400(CHARGEDLY_OPENDLY) is used. Signed-off-by: Vignesh R Signed-off-by: Dmitry Torokhov

Input: ti_am335x_tsc - remove udelay in interrupt handler

2015-02-03T19:50:38Z

TSC interrupt handler had udelay to avoid reporting of false pen-up interrupt to user space. This patch implements workaround suggesting in Advisory 1.0.31 of silicon errata for am335x, thus eliminating udelay and touchscreen lag. This also improves performance of touchscreen and eliminates sudden jump of cursor at touch release. IDLECONFIG and CHARGECONFIG registers are to be configured with same values in order to eliminate false pen-up events. This workaround may result in false pen-down to be detected, hence considerable charge step delay needs to be added. The charge delay is set to 0xB000 (in terms of ADC clock cycles) by default. TSC steps are disabled at the end of every sampling cycle and EOS bit is set. Once the EOS bit is set, the TSC steps need to be re-enabled to begin next sampling cycle. Signed-off-by: Brad Griffis [vigneshr@ti.com: Ported the patch from v3.12 to v3.19rc1] Signed-off-by: Vignesh R Signed-off-by: Dmitry Torokhov

Input: ti_am335x_tsc - interchange touchscreen and ADC steps

2015-02-03T19:50:37Z

This patch makes the initial changes required to workaround TSC-false pen-up interrupts. It is required to implement these changes in order to remove udelay in the TSC interrupt handler and false pen-up events. The charge step is to be executed immediately after sampling X+. Hence TSC is made to use higher numbered steps (steps 5 to 16 for 5 co-ordinate readouts, 4 wire TSC configuration) and ADC to use lower ones. Further X co-ordinate readouts must be the last to be sampled, thus co-ordinates are sampled in the order Y-Z-X. Signed-off-by: Brad Griffis [vigneshr@ti.com: Ported the patch from v3.12 to v3.19rc1] Signed-off-by: Vignesh R Acked-by: Jonathan Cameron Signed-off-by: Dmitry Torokhov

Input: MT - add support for balanced slot assignment

2015-02-01T19:50:35Z

Some devices are not fast enough to differentiate between a fast-moving contact and a new contact. This problem cannot be fully resolved because information is truly missing, but it is possible to safe-guard against obvious mistakes by restricting movement with a maximum displacement. The new problem formulation for dmax > 0 cannot benefit from the speedup for positive definite matrices, but since the convergence is faster, the result is about the same. For a handful of contacts, the latency difference is truly negligible. Suggested-by: Benjamin Tissoires Tested-by: Benjamin Tissoires Signed-off-by: Henrik Rydberg Signed-off-by: Dmitry Torokhov

Input: sun4i-ts - add support for touchpanel controller on A31

2015-01-27T07:58:56Z

The Allwinner A31 SoC (sun6i) has the same resistive touchpanel controller as on other sunxi platforms. The only difference between the variants is the control bits for enabling operations are left-shifted by 1 on the A31. Also update the comment for the original temperature sensor with information from Allwinner. Signed-off-by: Chen-Yu Tsai Signed-off-by: Dmitry Torokhov

Input: sun4i-ts - add thermal zone sensor support

2015-01-18T08:10:27Z

The touchscreen controller has a temperature sensor embedded in the SoC, which already has hwmon support in the driver. Add DT thermal zone support so we can use it with cpufreq for thermal throttling. This also adds a comment stating that we do not know the actual formula for calculating the temperature. Signed-off-by: Chen-Yu Tsai Acked-by: Eduardo Valentin Signed-off-by: Dmitry Torokhov

Merge tag 'v3.19-rc4' into next

2015-01-15T17:46:14Z

Merge with mainline to bring in the latest thermal and other changes.

Revert "Input: atmel_mxt_ts - use deep sleep mode when stopped"

2014-12-31T20:59:34Z

This reverts commit 9d469d033d135d80742a4e39e6bbb4519dd5eee1. It breaks the Chromebook Pixel touchpad (and touchscreen). Reported-by: Dirk Hohndel Bisected-by: Linus Torvalds Cc: Nick Dyer Cc: Benson Leung Cc: Yufeng Shen Cc: Dmitry Torokhov Cc: stable@vger.kernel.org # v3.16+ Signed-off-by: Linus Torvalds