Removing an item from the Device tree
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I have a little problem with the device tree
In zephyrproject/zephyr/boards/arm/nrf52840_mdk/nrf52840_mdk.dts the uart is defined as:
&uart0 { compatible = "nordic,nrf-uart"; current-speed = <115200>; status = "okay"; tx-pin = <20>; rx-pin = <19>; rts-pin = <5>; cts-pin = <7>; };
Which works just fine. However I am not using the RTS and CTS pin features of the UART, and I need to use the pins for other things. I can simply go into the DTS file and comment out the two pins:
&uart0 { compatible = "nordic,nrf-uart"; current-speed = <115200>; status = "okay"; tx-pin = <20>; rx-pin = <19>; /* rts-pin = <5>; */ /* cts-pin = <7>; */ };
And all is good. However I would prefer to use an overlay in my local working directory instead of making changes to the zephyr tree. I did try redefining uart0 in the local overlay, but RTS and CTS are still there.
What is the right way to remove RTS and CTS?
Lawrence King Principal Developer Connected Transport Market Unit +1(416)627-7302
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Kumar Gala
You can use /delete-property/, something like:
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&uart0 { /delete-property/ rts-pin; /delete-property/ cts-pin; }; In your overlay should work. - k
On Jan 15, 2020, at 8:49 AM, Lawrence King <lawrence.king@irdeto.com> wrote:
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Excellent solution. Thank you.
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Lawrence King Principal Developer +1(416)627-7302
-----Original Message-----
From: Kumar Gala <kumar.gala@linaro.org> Sent: Wednesday, January 15, 2020 9:52 AM To: Lawrence King <lawrence.king@irdeto.com> Cc: Zephyr-users@lists.zephyrproject.org Subject: Re: [Zephyr-users] Removing an item from the Device tree You can use /delete-property/, something like: &uart0 { /delete-property/ rts-pin; /delete-property/ cts-pin; }; In your overlay should work. - k On Jan 15, 2020, at 8:49 AM, Lawrence King <lawrence.king@irdeto.com> wrote:
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