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shields: esp_8266: support Nuvoton numaker_m55m1 board

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1. Support H/W reset pin
2. Support UART flow control (CTS/RTS)

Signed-off-by: Chun-Chieh Li <ccli8@nuvoton.com>
This commit is contained in:
Chun-Chieh Li 2025-05-16 15:10:34 +08:00 • committed by Benjamin Cabé
commit 1d913d2147
1 changed files with 43 additions and 0 deletions
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boards/shields/esp_8266/boards/numaker_m55m1.overlay Normal file
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/*
* Copyright (c) 2025 Nuvoton Technology Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
&pinctrl {
uart8_esp8266: uart8_esp8266 {
group0 {
pinmux = <PJ0MFP_UART8_TXD>,
<PJ1MFP_UART8_RXD>,
<PI15MFP_UART8_nRTS>,
<PI14MFP_UART8_nCTS>;
};
};
};
&uart8 {
status = "okay";
current-speed = <115200>;
hw-flow-control;
pinctrl-0 = <&uart8_esp8266>;
pinctrl-names = "default";
esp8266: esp8266 {
compatible = "espressif,esp-at";
reset-gpios = <&gpiod 2 GPIO_ACTIVE_LOW>;
status = "okay";
};
};
&gpiod {
status = "okay";
};
&gpioi {
status = "okay";
};
&gpioj {
status = "okay";
};