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tests: drivers: pwm: stm32 board for loopback test

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Add overlay file for disco_l475_iot1 board to pwm_loopback test.

The file is based on the existing overlays for twr_ke18f and frdm_k64f.

The new configuration uses both a 16-Bit timer with active prescaler
as well as a 32-Bit timer with deactivated prescaler for coverage.

It is assumed that other STM32 boards will behave like the
disco_l475_iot1. Only this board was available for testing.

Signed-off-by: Tilmann Unte <unte@es-augsburg.de>
This commit is contained in:
Tilmann Unte 2021-10-26 13:25:51 +02:00 • committed by Christopher Friedt
commit a9ba637ac9
1 changed files with 52 additions and 0 deletions
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tests/drivers/pwm/pwm_loopback/boards/disco_l475_iot1.overlay Normal file
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/*
* Copyright (c) 2021 Tilmann Unte
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <dt-bindings/pwm/pwm.h>
/ {
pwm_loopback_0 {
compatible = "test-pwm-loopback";
/* first index must be a 32-Bit timer */
pwms = <&pwm2 1 0 PWM_POLARITY_NORMAL>,
<&pwm15 1 0 PWM_POLARITY_NORMAL>;
};
};
/* 32-Bit timers */
&timers2 {
status = "okay";
pwm2: pwm {
status = "okay";
pinctrl-0 = <&tim2_ch1_pa5>; /* CN1 D13 */
};
};
&timers5 {
status = "okay";
pwm5: pwm {
status = "okay";
pinctrl-0 = <&tim5_ch1_pa0>; /* CN3 D1 */
};
};
/* 16-Bit timers */
&timers3 {
status = "okay";
st,prescaler = <255>;
pwm3: pwm {
status = "okay";
pinctrl-0 = <&tim3_ch1_pa6>; /* CN1 D12 */
};
};
&timers15 {
status = "okay";
st,prescaler = <255>;
pwm15: pwm {
status = "okay";
pinctrl-0 = <&tim15_ch1_pa2>; /* CN1 D10 */
};
};