From mboxrd@z Thu Jan 1 00:00:00 1970 From: gregory.clement@free-electrons.com (Gregory CLEMENT) Date: Mon, 25 Jan 2016 16:41:01 +0100 Subject: [PATCH] ARM: DTS: kirkwood-openrd: provide template for RS-232/485 configuration In-Reply-To: <1453581437-14135-1-git-send-email-aaro.koskinen@iki.fi> (Aaro Koskinen's message of "Sat, 23 Jan 2016 22:37:17 +0200") References: <1453581437-14135-1-git-send-email-aaro.koskinen@iki.fi> Message-ID: <878u3dekfm.fsf@free-electrons.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Aaro, On sam., janv. 23 2016, Aaro Koskinen wrote: > Some OpenRD boards have RS-232 and RS-486 connectors wired, but using them > needs a custom DTB as the current DTB configures SD card slot instead. > > This patch adds documentation into the DTS on how to change > the configuration. > > Signed-off-by: Aaro Koskinen Applied on mvebu/dt with Andrew Reviewed-by tag Thanks, Gregory > --- > arch/arm/boot/dts/kirkwood-openrd.dtsi | 31 ++++++++++++++++++++++++++++++- > 1 file changed, 30 insertions(+), 1 deletion(-) > > diff --git a/arch/arm/boot/dts/kirkwood-openrd.dtsi b/arch/arm/boot/dts/kirkwood-openrd.dtsi > index f65b727..24f1d30 100644 > --- a/arch/arm/boot/dts/kirkwood-openrd.dtsi > +++ b/arch/arm/boot/dts/kirkwood-openrd.dtsi > @@ -40,7 +40,7 @@ > pinctrl-0 = <&pmx_select28 &pmx_sdio_cd &pmx_select34>; > pinctrl-names = "default"; > > - pmx_select28: pmx-select-rs232-rs484 { > + pmx_select28: pmx-select-rs232-rs485 { > marvell,pins = "mpp28"; > marvell,function = "gpio"; > }; > @@ -65,10 +65,39 @@ > status = "okay"; > cd-gpios = <&gpio0 29 9>; > }; > + gpio at 10100 { > + p28 { > + gpio-hog; > + gpios = <28 GPIO_ACTIVE_HIGH>; > + /* > + * SelRS232or485 selects between RS-232 or RS-485 > + * mode for the second UART. > + * > + * Low: RS-232 > + * High: RS-485 > + * > + * To use the second UART, you need to change also > + * the SelUARTorSD. > + */ > + output-low; > + line-name = "SelRS232or485"; > + }; > + }; > gpio at 10140 { > p2 { > gpio-hog; > gpios = <2 GPIO_ACTIVE_HIGH>; > + /* > + * SelUARTorSD selects between the second UART > + * (serial at 12100) and SD (mvsdio at 90000). > + * > + * Low: UART > + * High: SD > + * > + * When changing this line make sure the newly > + * selected device node is enabled and the > + * previously selected device node is disabled. > + */ > output-high; /* Select SD by default */ > line-name = "SelUARTorSD"; > }; > -- > 2.4.0 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel at lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -- Gregory Clement, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gregory CLEMENT Subject: Re: [PATCH] ARM: DTS: kirkwood-openrd: provide template for RS-232/485 configuration Date: Mon, 25 Jan 2016 16:41:01 +0100 Message-ID: <878u3dekfm.fsf@free-electrons.com> References: <1453581437-14135-1-git-send-email-aaro.koskinen@iki.fi> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1453581437-14135-1-git-send-email-aaro.koskinen-X3B1VOXEql0@public.gmane.org> (Aaro Koskinen's message of "Sat, 23 Jan 2016 22:37:17 +0200") Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Aaro Koskinen Cc: Jason Cooper , Andrew Lunn , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Martin Michlmayr , Rick Thomas List-Id: devicetree@vger.kernel.org Hi Aaro, On sam., janv. 23 2016, Aaro Koskinen wrote: > Some OpenRD boards have RS-232 and RS-486 connectors wired, but using them > needs a custom DTB as the current DTB configures SD card slot instead. > > This patch adds documentation into the DTS on how to change > the configuration. > > Signed-off-by: Aaro Koskinen Applied on mvebu/dt with Andrew Reviewed-by tag Thanks, Gregory > --- > arch/arm/boot/dts/kirkwood-openrd.dtsi | 31 ++++++++++++++++++++++++++++++- > 1 file changed, 30 insertions(+), 1 deletion(-) > > diff --git a/arch/arm/boot/dts/kirkwood-openrd.dtsi b/arch/arm/boot/dts/kirkwood-openrd.dtsi > index f65b727..24f1d30 100644 > --- a/arch/arm/boot/dts/kirkwood-openrd.dtsi > +++ b/arch/arm/boot/dts/kirkwood-openrd.dtsi > @@ -40,7 +40,7 @@ > pinctrl-0 = <&pmx_select28 &pmx_sdio_cd &pmx_select34>; > pinctrl-names = "default"; > > - pmx_select28: pmx-select-rs232-rs484 { > + pmx_select28: pmx-select-rs232-rs485 { > marvell,pins = "mpp28"; > marvell,function = "gpio"; > }; > @@ -65,10 +65,39 @@ > status = "okay"; > cd-gpios = <&gpio0 29 9>; > }; > + gpio@10100 { > + p28 { > + gpio-hog; > + gpios = <28 GPIO_ACTIVE_HIGH>; > + /* > + * SelRS232or485 selects between RS-232 or RS-485 > + * mode for the second UART. > + * > + * Low: RS-232 > + * High: RS-485 > + * > + * To use the second UART, you need to change also > + * the SelUARTorSD. > + */ > + output-low; > + line-name = "SelRS232or485"; > + }; > + }; > gpio@10140 { > p2 { > gpio-hog; > gpios = <2 GPIO_ACTIVE_HIGH>; > + /* > + * SelUARTorSD selects between the second UART > + * (serial@12100) and SD (mvsdio@90000). > + * > + * Low: UART > + * High: SD > + * > + * When changing this line make sure the newly > + * selected device node is enabled and the > + * previously selected device node is disabled. > + */ > output-high; /* Select SD by default */ > line-name = "SelUARTorSD"; > }; > -- > 2.4.0 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -- Gregory Clement, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html