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drivers: input: added stm32 tsc peripheral support #81187

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Merged
merged 4 commits into from
Mar 17, 2025
Merged

drivers: input: added stm32 tsc peripheral support #81187

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924ca5a
dts: bindings: added stm32 tsc driver bindings
arifbalik Nov 10, 2024
3ff6b02
boards: st: added tsc peripheral to U0 series
arifbalik Nov 10, 2024
d84c2e2
driver: input: added input_tsc_keys
arifbalik Dec 2, 2024
5ea7263
tests: misc: added stm32 tsc driver test implementation
arifbalik Nov 17, 2024
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36 changes: 36 additions & 0 deletions boards/st/stm32u083c_dk/stm32u083c_dk.dts
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@
#include <st/u0/stm32u083mctx-pinctrl.dtsi>
#include "arduino_r3_connector.dtsi"
#include <zephyr/dt-bindings/input/input-event-codes.h>
#include <zephyr/dt-bindings/input/stm32-tsc-defines.h>

/ {
model = "STMicroelectronics STM32U83C-DK board";
Expand Down Expand Up @@ -124,3 +125,38 @@
status = "okay";
};
};

&tsc {
status = "okay";
pinctrl-0 = <&tsc_g1_io1_pb12 &tsc_g1_io2_pb13 &tsc_g6_io1_pd10 &tsc_g6_io2_pd11>;
pinctrl-names = "default";

st,pulse-generator-prescaler = <2>;
st,charge-transfer-pulse-high = <2>;
st,charge-transfer-pulse-low = <2>;
st,spread-spectrum;
st,spread-spectrum-prescaler = <2>;
st,spread-spectrum-deviation = <100>;
st,max-count-value = <8191>;

tsc_group1: g1 {
group = <1>;
st,use-as-shield;
channel-ios = <TSC_IO2>;
sampling-io = <TSC_IO1>;
};

tsc_group6: g6 {
group = <6>;
channel-ios = <TSC_IO2>;
sampling-io = <TSC_IO1>;
ts1 {
compatible = "tsc-keys";
sampling-interval-ms = <10>;
oversampling = <10>;
noise-threshold = <50>;
sticky-key-timeout-ms = <10000>;
zephyr,code = <INPUT_KEY_0>;
};
};
};
1 change: 1 addition & 0 deletions boards/st/stm32u083c_dk/stm32u083c_dk.yaml
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Expand Up @@ -16,5 +16,6 @@ supported:
- i2c
- pwm
- usart
- tsc
ram: 40
flash: 256
1 change: 1 addition & 0 deletions drivers/input/CMakeLists.txt
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Expand Up @@ -28,6 +28,7 @@ zephyr_library_sources_ifdef(CONFIG_INPUT_PAW32XX input_paw32xx.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_PINNACLE input_pinnacle.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_PMW3610 input_pmw3610.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_SBUS input_sbus.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_STM32_TSC_KEYS input_tsc_keys.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_STMPE811 input_stmpe811.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_TOUCH input_touch.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_XEC_KBD input_xec_kbd.c)
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1 change: 1 addition & 0 deletions drivers/input/Kconfig
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Expand Up @@ -33,6 +33,7 @@ source "drivers/input/Kconfig.sbus"
source "drivers/input/Kconfig.sdl"
source "drivers/input/Kconfig.stmpe811"
source "drivers/input/Kconfig.touch"
source "drivers/input/Kconfig.tsc_keys"
source "drivers/input/Kconfig.xec"
source "drivers/input/Kconfig.xpt2046"
# zephyr-keep-sorted-stop
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21 changes: 21 additions & 0 deletions drivers/input/Kconfig.tsc_keys
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@@ -0,0 +1,21 @@
# Copyright (c) 2024 Arif Balik <[email protected]>
# SPDX-License-Identifier: Apache-2.0

config INPUT_STM32_TSC_KEYS
bool "STM32 TSC touch library"
default y
depends on DT_HAS_ST_STM32_TSC_ENABLED
select RING_BUFFER
help
Enable support for STM32 TSC touch library.

config INPUT_STM32_TSC_KEYS_BUFFER_WORD_SIZE
int "STM32 TSC touch buffer size in words"
default 10
depends on INPUT_STM32_TSC_KEYS
help
Size of the ring buffer for the STM32 TSC touch library. The size of this
buffer together with the sampling-interval property in the tsc-keys
device tree node determines the time window of interest. A slope value is
calculated between the oldest and the newest value in the buffer to
generate a press or release input event.
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