linux-kernel - Re: [PATCH v6 0/2] serial: 8250: Add support for rs485 half/full duplex on puma/ringneck-haikou

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Date: Tue, 13 Feb 2024 20:16:15 +0100
From: Heiko Stuebner <heiko@...ech.de>
To: Farouk Bouabid <farouk.bouabid@...obroma-systems.com>,
	Conor Dooley <conor+dt@...nel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc: Heiko Stuebner <heiko@...ech.de>,
	quentin.schulz@...obroma-systems.com,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH v6 0/2] serial: 8250: Add support for rs485 half/full duplex on puma/ringneck-haikou

On Thu, 08 Feb 2024 16:39:54 +0100, Farouk Bouabid wrote:
> On the boards that we are using (ringneck/puma-haikou) a hardware switch
> can set the rs485 transceiver into half or full duplex mode.
> 
> In half-duplex mode the DE/RE signal of the rs485 transceiver is not
> connected to an RTS signal whose control is already handled in the rs485
> emulation (start/stop callbacks), but rather to a gpio. And since enabling
> the receiver requires setting this gpio active we need to do that in em485
> while receiving and disable it while sending to enable the driver mode.
> 
> [...]

Applied, thanks!

[1/2] arm64: dts: rockchip: rk3399-puma-haikou: add rs485 support on uart2
      commit: 54448f711aa32f176534bbd7b1903cc6d1c8a50d
[2/2] arm64: dts: rockchip: px30-ringneck-haikou: add rs485 support on uart5
      commit: 5963d97aa780619ffb66cf4886c0ca1175ccbd3e

Best regards,
-- 
Heiko Stuebner <heiko@...ech.de>