From: Tim Harvey <tharvey@gateworks.com> To: Rob Herring <robh+dt@kernel.org>, Shawn Guo <shawnguo@kernel.org>, Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix Kernel Team <kernel@pengutronix.de>, Fabio Estevam <festevam@gmail.com>, NXP Linux Team <linux-imx@nxp.com>, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Tim Harvey <tharvey@gateworks.com> Subject: [PATCH v2] arm64: dts: imx8mm-venice-gw73xx-0x: add dt overlays for serial modes Date: Fri, 21 Jan 2022 10:17:05 -0800 [thread overview] Message-ID: <20220121181705.13363-1-tharvey@gateworks.com> (raw) The imx8mm-venice-gw73xx-0x som+baseboard combination has a multi-protocol RS-232/RS-485/RS-422 transceiver to an off-board connector which can be configured in a number of ways via UART and GPIO configuration. The default configuration per the imx8mm-venice-gw73xx-0x dts is for UART2 TX/RX and UART4 TX/RX to be available as RS-232: J15.1 UART2 TX out J15.2 UART2 RX in J15.3 UART4 TX out J15.4 UART4 RX in J15.5 GND Add dt overlays to allow additional the modes of operation: rs232-rts (UART2 RS-232 with RTS/CTS hardware flow control) J15.1 TX out J15.2 RX in J15.3 RTS out J15.4 CTS in J15.5 GND rs485 (UART2 RS-485 half duplex) J15.1 TXRX- J15.2 N/C J15.3 TXRX+ J15.4 N/C J15.5 GND rs422 (UART2 RS-422 full duplex) J15.1 TX- J15.2 RX+ J15.3 TX+ J15.4 RX- J15.5 GND Signed-off-by: Tim Harvey <tharvey@gateworks.com> --- v2: fixed typo: s/uast/uart/ --- arch/arm64/boot/dts/freescale/Makefile | 3 + .../imx8mm-venice-gw73xx-0x-rs232-rts.dts | 53 ++++++++++++++++ .../imx8mm-venice-gw73xx-0x-rs422.dts | 61 +++++++++++++++++++ .../imx8mm-venice-gw73xx-0x-rs485.dts | 61 +++++++++++++++++++ 4 files changed, 178 insertions(+) create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs232-rts.dts create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs422.dts create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs485.dts diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile index a14a6173b765..5ec8d59347b6 100644 --- a/arch/arm64/boot/dts/freescale/Makefile +++ b/arch/arm64/boot/dts/freescale/Makefile @@ -44,6 +44,9 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-var-som-symphony.dtb dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw71xx-0x.dtb dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw72xx-0x.dtb dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw73xx-0x.dtb +dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw73xx-0x-rs232-rts.dtbo +dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw73xx-0x-rs422.dtbo +dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw73xx-0x-rs485.dtbo dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw7901.dtb dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw7902.dtb dtb-$(CONFIG_ARCH_MXC) += imx8mn-beacon-kit.dtb diff --git a/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs232-rts.dts b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs232-rts.dts new file mode 100644 index 000000000000..2fa635e1c1a8 --- /dev/null +++ b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs232-rts.dts @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR MIT) +/* + * Copyright 2022 Gateworks Corporation + * + * GW73xx RS232 with RTS/CTS hardware flow control: + * - GPIO4_0 rs485_en needs to be driven low (in-active) + * - UART4_TX becomes RTS + * - UART4_RX becomes CTS + */ + +#include <dt-bindings/gpio/gpio.h> + +#include "imx8mm-pinfunc.h" + +/dts-v1/; +/plugin/; + +&{/} { + compatible = "gw,imx8mm-gw73xx-0x"; +}; + +&gpio4 { + rs485_en { + gpio-hog; + gpios = <0 GPIO_ACTIVE_HIGH>; + output-low; + line-name = "rs485_en"; + }; +}; + +&uart2 { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_uart2>; + rts-gpios = <&gpio5 29 GPIO_ACTIVE_LOW>; + cts-gpios = <&gpio5 28 GPIO_ACTIVE_LOW>; + uart-has-rtscts; + status = "okay"; +}; + +&uart4 { + status = "disabled"; +}; + +&iomuxc { + pinctrl_uart2: uart2grp { + fsl,pins = < + MX8MM_IOMUXC_UART2_RXD_UART2_DCE_RX 0x140 + MX8MM_IOMUXC_UART2_TXD_UART2_DCE_TX 0x140 + MX8MM_IOMUXC_UART4_TXD_GPIO5_IO29 0x140 + MX8MM_IOMUXC_UART4_RXD_GPIO5_IO28 0x140 + >; + }; +}; diff --git a/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs422.dts b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs422.dts new file mode 100644 index 000000000000..3e6404340d52 --- /dev/null +++ b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs422.dts @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR MIT) +/* + * Copyright 2021 Gateworks Corporation + * + * GW73xx RS422 (RS485 full duplex): + * - GPIO1_0 rs485_term selects on-chip termination + * - GPIO4_0 rs485_en needs to be driven high (active) + * - GPIO4_2 rs485_hd needs to be driven low (in-active) + * - UART4_TX is DE for RS485 transmitter + * - RS485_EN needs to be pulled high + * - RS485_HALF needs to be low + */ + +#include <dt-bindings/gpio/gpio.h> + +#include "imx8mm-pinfunc.h" + +/dts-v1/; +/plugin/; + +&{/} { + compatible = "gw,imx8mm-gw73xx-0x"; +}; + +&gpio4 { + rs485_en { + gpio-hog; + gpios = <0 GPIO_ACTIVE_HIGH>; + output-high; + line-name = "rs485_en"; + }; + + rs485_hd { + gpio-hog; + gpios = <2 GPIO_ACTIVE_HIGH>; + output-low; + line-name = "rs485_hd"; + }; +}; + +&uart2 { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_uart2>; + rts-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>; + linux,rs485-enabled-at-boot-time; + status = "okay"; +}; + +&uart4 { + status = "disabled"; +}; + +&iomuxc { + pinctrl_uart2: uart2grp { + fsl,pins = < + MX8MM_IOMUXC_UART2_RXD_UART2_DCE_RX 0x140 + MX8MM_IOMUXC_UART2_TXD_UART2_DCE_TX 0x140 + MX8MM_IOMUXC_UART4_TXD_GPIO5_IO29 0x140 + >; + }; +}; diff --git a/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs485.dts b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs485.dts new file mode 100644 index 000000000000..2c71ab9854cb --- /dev/null +++ b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs485.dts @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR MIT) +/* + * Copyright 2021 Gateworks Corporation + * + * GW73xx RS485 HD: + * - GPIO1_0 rs485_term selects on-chip termination + * - GPIO4_0 rs485_en needs to be driven high (active) + * - GPIO4_2 rs485_hd needs to be driven high (active) + * - UART4_TX is DE for RS485 transmitter + * - RS485_EN needs to be pulled high + * - RS485_HALF needs to be pulled high + */ + +#include <dt-bindings/gpio/gpio.h> + +#include "imx8mm-pinfunc.h" + +/dts-v1/; +/plugin/; + +&{/} { + compatible = "gw,imx8mm-gw73xx-0x"; +}; + +&gpio4 { + rs485_en { + gpio-hog; + gpios = <0 GPIO_ACTIVE_HIGH>; + output-high; + line-name = "rs485_en"; + }; + + rs485_hd { + gpio-hog; + gpios = <2 GPIO_ACTIVE_HIGH>; + output-high; + line-name = "rs485_hd"; + }; +}; + +&uart2 { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_uart2>; + rts-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>; + linux,rs485-enabled-at-boot-time; + status = "okay"; +}; + +&uart4 { + status = "disabled"; +}; + +&iomuxc { + pinctrl_uart2: uart2grp { + fsl,pins = < + MX8MM_IOMUXC_UART2_RXD_UART2_DCE_RX 0x140 + MX8MM_IOMUXC_UART2_TXD_UART2_DCE_TX 0x140 + MX8MM_IOMUXC_UART4_TXD_GPIO5_IO29 0x140 + >; + }; +}; -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: Tim Harvey <tharvey@gateworks.com> To: Rob Herring <robh+dt@kernel.org>, Shawn Guo <shawnguo@kernel.org>, Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix Kernel Team <kernel@pengutronix.de>, Fabio Estevam <festevam@gmail.com>, NXP Linux Team <linux-imx@nxp.com>, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Tim Harvey <tharvey@gateworks.com> Subject: [PATCH v2] arm64: dts: imx8mm-venice-gw73xx-0x: add dt overlays for serial modes Date: Fri, 21 Jan 2022 10:17:05 -0800 [thread overview] Message-ID: <20220121181705.13363-1-tharvey@gateworks.com> (raw) The imx8mm-venice-gw73xx-0x som+baseboard combination has a multi-protocol RS-232/RS-485/RS-422 transceiver to an off-board connector which can be configured in a number of ways via UART and GPIO configuration. The default configuration per the imx8mm-venice-gw73xx-0x dts is for UART2 TX/RX and UART4 TX/RX to be available as RS-232: J15.1 UART2 TX out J15.2 UART2 RX in J15.3 UART4 TX out J15.4 UART4 RX in J15.5 GND Add dt overlays to allow additional the modes of operation: rs232-rts (UART2 RS-232 with RTS/CTS hardware flow control) J15.1 TX out J15.2 RX in J15.3 RTS out J15.4 CTS in J15.5 GND rs485 (UART2 RS-485 half duplex) J15.1 TXRX- J15.2 N/C J15.3 TXRX+ J15.4 N/C J15.5 GND rs422 (UART2 RS-422 full duplex) J15.1 TX- J15.2 RX+ J15.3 TX+ J15.4 RX- J15.5 GND Signed-off-by: Tim Harvey <tharvey@gateworks.com> --- v2: fixed typo: s/uast/uart/ --- arch/arm64/boot/dts/freescale/Makefile | 3 + .../imx8mm-venice-gw73xx-0x-rs232-rts.dts | 53 ++++++++++++++++ .../imx8mm-venice-gw73xx-0x-rs422.dts | 61 +++++++++++++++++++ .../imx8mm-venice-gw73xx-0x-rs485.dts | 61 +++++++++++++++++++ 4 files changed, 178 insertions(+) create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs232-rts.dts create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs422.dts create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs485.dts diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile index a14a6173b765..5ec8d59347b6 100644 --- a/arch/arm64/boot/dts/freescale/Makefile +++ b/arch/arm64/boot/dts/freescale/Makefile @@ -44,6 +44,9 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-var-som-symphony.dtb dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw71xx-0x.dtb dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw72xx-0x.dtb dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw73xx-0x.dtb +dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw73xx-0x-rs232-rts.dtbo +dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw73xx-0x-rs422.dtbo +dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw73xx-0x-rs485.dtbo dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw7901.dtb dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw7902.dtb dtb-$(CONFIG_ARCH_MXC) += imx8mn-beacon-kit.dtb diff --git a/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs232-rts.dts b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs232-rts.dts new file mode 100644 index 000000000000..2fa635e1c1a8 --- /dev/null +++ b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs232-rts.dts @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR MIT) +/* + * Copyright 2022 Gateworks Corporation + * + * GW73xx RS232 with RTS/CTS hardware flow control: + * - GPIO4_0 rs485_en needs to be driven low (in-active) + * - UART4_TX becomes RTS + * - UART4_RX becomes CTS + */ + +#include <dt-bindings/gpio/gpio.h> + +#include "imx8mm-pinfunc.h" + +/dts-v1/; +/plugin/; + +&{/} { + compatible = "gw,imx8mm-gw73xx-0x"; +}; + +&gpio4 { + rs485_en { + gpio-hog; + gpios = <0 GPIO_ACTIVE_HIGH>; + output-low; + line-name = "rs485_en"; + }; +}; + +&uart2 { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_uart2>; + rts-gpios = <&gpio5 29 GPIO_ACTIVE_LOW>; + cts-gpios = <&gpio5 28 GPIO_ACTIVE_LOW>; + uart-has-rtscts; + status = "okay"; +}; + +&uart4 { + status = "disabled"; +}; + +&iomuxc { + pinctrl_uart2: uart2grp { + fsl,pins = < + MX8MM_IOMUXC_UART2_RXD_UART2_DCE_RX 0x140 + MX8MM_IOMUXC_UART2_TXD_UART2_DCE_TX 0x140 + MX8MM_IOMUXC_UART4_TXD_GPIO5_IO29 0x140 + MX8MM_IOMUXC_UART4_RXD_GPIO5_IO28 0x140 + >; + }; +}; diff --git a/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs422.dts b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs422.dts new file mode 100644 index 000000000000..3e6404340d52 --- /dev/null +++ b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs422.dts @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR MIT) +/* + * Copyright 2021 Gateworks Corporation + * + * GW73xx RS422 (RS485 full duplex): + * - GPIO1_0 rs485_term selects on-chip termination + * - GPIO4_0 rs485_en needs to be driven high (active) + * - GPIO4_2 rs485_hd needs to be driven low (in-active) + * - UART4_TX is DE for RS485 transmitter + * - RS485_EN needs to be pulled high + * - RS485_HALF needs to be low + */ + +#include <dt-bindings/gpio/gpio.h> + +#include "imx8mm-pinfunc.h" + +/dts-v1/; +/plugin/; + +&{/} { + compatible = "gw,imx8mm-gw73xx-0x"; +}; + +&gpio4 { + rs485_en { + gpio-hog; + gpios = <0 GPIO_ACTIVE_HIGH>; + output-high; + line-name = "rs485_en"; + }; + + rs485_hd { + gpio-hog; + gpios = <2 GPIO_ACTIVE_HIGH>; + output-low; + line-name = "rs485_hd"; + }; +}; + +&uart2 { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_uart2>; + rts-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>; + linux,rs485-enabled-at-boot-time; + status = "okay"; +}; + +&uart4 { + status = "disabled"; +}; + +&iomuxc { + pinctrl_uart2: uart2grp { + fsl,pins = < + MX8MM_IOMUXC_UART2_RXD_UART2_DCE_RX 0x140 + MX8MM_IOMUXC_UART2_TXD_UART2_DCE_TX 0x140 + MX8MM_IOMUXC_UART4_TXD_GPIO5_IO29 0x140 + >; + }; +}; diff --git a/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs485.dts b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs485.dts new file mode 100644 index 000000000000..2c71ab9854cb --- /dev/null +++ b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw73xx-0x-rs485.dts @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR MIT) +/* + * Copyright 2021 Gateworks Corporation + * + * GW73xx RS485 HD: + * - GPIO1_0 rs485_term selects on-chip termination + * - GPIO4_0 rs485_en needs to be driven high (active) + * - GPIO4_2 rs485_hd needs to be driven high (active) + * - UART4_TX is DE for RS485 transmitter + * - RS485_EN needs to be pulled high + * - RS485_HALF needs to be pulled high + */ + +#include <dt-bindings/gpio/gpio.h> + +#include "imx8mm-pinfunc.h" + +/dts-v1/; +/plugin/; + +&{/} { + compatible = "gw,imx8mm-gw73xx-0x"; +}; + +&gpio4 { + rs485_en { + gpio-hog; + gpios = <0 GPIO_ACTIVE_HIGH>; + output-high; + line-name = "rs485_en"; + }; + + rs485_hd { + gpio-hog; + gpios = <2 GPIO_ACTIVE_HIGH>; + output-high; + line-name = "rs485_hd"; + }; +}; + +&uart2 { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_uart2>; + rts-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>; + linux,rs485-enabled-at-boot-time; + status = "okay"; +}; + +&uart4 { + status = "disabled"; +}; + +&iomuxc { + pinctrl_uart2: uart2grp { + fsl,pins = < + MX8MM_IOMUXC_UART2_RXD_UART2_DCE_RX 0x140 + MX8MM_IOMUXC_UART2_TXD_UART2_DCE_TX 0x140 + MX8MM_IOMUXC_UART4_TXD_GPIO5_IO29 0x140 + >; + }; +}; -- 2.17.1
next reply other threads:[~2022-01-21 18:18 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-01-21 18:17 Tim Harvey [this message] 2022-01-21 18:17 ` [PATCH v2] arm64: dts: imx8mm-venice-gw73xx-0x: add dt overlays for serial modes Tim Harvey
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20220121181705.13363-1-tharvey@gateworks.com \ --to=tharvey@gateworks.com \ --cc=devicetree@vger.kernel.org \ --cc=festevam@gmail.com \ --cc=kernel@pengutronix.de \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-imx@nxp.com \ --cc=linux-kernel@vger.kernel.org \ --cc=robh+dt@kernel.org \ --cc=s.hauer@pengutronix.de \ --cc=shawnguo@kernel.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.