* [PATCH] ARM: DTS: kirkwood-openrd: provide template for RS-232/485 configuration
@ 2016-01-23 20:37 Aaro Koskinen
[not found] ` <1453581437-14135-1-git-send-email-aaro.koskinen-X3B1VOXEql0@public.gmane.org>
0 siblings, 1 reply; 3+ messages in thread
From: Aaro Koskinen @ 2016-01-23 20:37 UTC (permalink / raw)
To: Jason Cooper, Andrew Lunn,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
devicetree-u79uwXL29TY76Z2rM5mHXA, Martin Michlmayr, Rick Thomas
Cc: Aaro Koskinen
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 <aaro.koskinen-X3B1VOXEql0@public.gmane.org>
---
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
--
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^ permalink raw reply related [flat|nested] 3+ messages in thread[parent not found: <1453581437-14135-1-git-send-email-aaro.koskinen-X3B1VOXEql0@public.gmane.org>]
* Re: [PATCH] ARM: DTS: kirkwood-openrd: provide template for RS-232/485 configuration [not found] ` <1453581437-14135-1-git-send-email-aaro.koskinen-X3B1VOXEql0@public.gmane.org> @ 2016-01-24 17:28 ` Andrew Lunn 2016-01-25 15:41 ` Gregory CLEMENT 1 sibling, 0 replies; 3+ messages in thread From: Andrew Lunn @ 2016-01-24 17:28 UTC (permalink / raw) To: Aaro Koskinen Cc: Gregory Clement, Jason Cooper, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, devicetree-u79uwXL29TY76Z2rM5mHXA, Martin Michlmayr, Rick Thomas On Sat, Jan 23, 2016 at 10:37:17PM +0200, 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 <aaro.koskinen-X3B1VOXEql0@public.gmane.org> Reviewed-by: Andrew Lunn <andrew-g2DYL2Zd6BY@public.gmane.org> Thanks Andrew > --- > 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 > -- 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 ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] ARM: DTS: kirkwood-openrd: provide template for RS-232/485 configuration [not found] ` <1453581437-14135-1-git-send-email-aaro.koskinen-X3B1VOXEql0@public.gmane.org> 2016-01-24 17:28 ` Andrew Lunn @ 2016-01-25 15:41 ` Gregory CLEMENT 1 sibling, 0 replies; 3+ messages in thread From: Gregory CLEMENT @ 2016-01-25 15:41 UTC (permalink / raw) To: Aaro Koskinen Cc: Jason Cooper, Andrew Lunn, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, devicetree-u79uwXL29TY76Z2rM5mHXA, Martin Michlmayr, Rick Thomas Hi Aaro, On sam., janv. 23 2016, Aaro Koskinen <aaro.koskinen-X3B1VOXEql0@public.gmane.org> 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 <aaro.koskinen-X3B1VOXEql0@public.gmane.org> 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 ^ permalink raw reply [flat|nested] 3+ messages in thread
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2016-01-23 20:37 [PATCH] ARM: DTS: kirkwood-openrd: provide template for RS-232/485 configuration Aaro Koskinen
[not found] ` <1453581437-14135-1-git-send-email-aaro.koskinen-X3B1VOXEql0@public.gmane.org>
2016-01-24 17:28 ` Andrew Lunn
2016-01-25 15:41 ` Gregory CLEMENT
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