From: gregory.clement@free-electrons•com (Gregory CLEMENT)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 16/16] arm64: dts: marvell: armada-3720-espressobin: fill UART nodes
Date: Fri, 06 Oct 2017 15:01:18 +0200 [thread overview]
Message-ID: <87fuawe8gx.fsf@free-electrons.com> (raw)
In-Reply-To: <20171006101344.15590-17-miquel.raynal@free-electrons.com> (Miquel Raynal's message of "Fri, 6 Oct 2017 12:13:44 +0200")
Hi Miquel,
On ven., oct. 06 2017, Miquel Raynal <miquel.raynal@free-electrons•com> wrote:
> Fill ESPRESSObin uart0 node with pinctrl information like in the
> Armada-3720-DB device tree (which uses the same node).
>
> Also explain how to enable the second UART port available on the
> headers. This second port is not enabled by default because both
> headers are dedicated to expose general purpose pins and remapping
> some of them to use the second UART would break existing users.
>
> Suggested-by: L?szl? ?SHIN <laszlo@ashin•hu>
> Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons•com>
> ---
> arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts b/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts
> index 2ce52ba74f73..c05b274ab1a9 100644
> --- a/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts
> +++ b/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts
> @@ -98,9 +98,17 @@
>
> /* Exported on the micro USB connector J5 through an FTDI */
> &uart0 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&uart1_pins>;
> status = "okay";
> };
>
> +/*
> + * Enabling the second UART on J17 (pins 24,26) is just a matter of copying the
> + * uart1 node from armada-3720-db.dts with one difference: it works with 1.8V
> + * TTL levels.
This difference is not related to the device tree. So I would write:
/*
* To enable the second UART on J17 (pins 24,26) refer to the uart1
* node from armada-3720-db.dts.
* Note that TX and RX signal are the ones coming directly from the SoC:
* 1.8V TTL.
*/
Thanks,
Gregory
> + */
> +
> /* J7 */
> &usb3 {
> status = "okay";
> --
> 2.11.0
>
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
next prev parent reply other threads:[~2017-10-06 13:01 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-06 10:13 [PATCH 00/16] Support armada-37xx second UART port Miquel Raynal
2017-10-06 10:13 ` [PATCH 01/16] dt-bindings: mvebu-uart: update documentation with extended UART Miquel Raynal
2017-10-06 12:17 ` Gregory CLEMENT
2017-10-06 10:13 ` [PATCH 02/16] pinctrl: dt-bindings: Fix A37xx uart2 group name Miquel Raynal
2017-10-06 12:18 ` Gregory CLEMENT
2017-10-06 10:13 ` [PATCH 03/16] serial: mvebu-uart: use driver name when requesting an interrupt Miquel Raynal
2017-10-06 12:19 ` Gregory CLEMENT
2017-10-06 10:13 ` [PATCH 04/16] serial: mvebu-uart: support probe of multiple ports Miquel Raynal
2017-10-06 12:23 ` Gregory CLEMENT
2017-10-09 7:17 ` Miquel RAYNAL
2017-10-12 12:22 ` Gregory CLEMENT
2017-10-13 7:29 ` Miquel RAYNAL
2017-10-06 10:13 ` [PATCH 05/16] serial: mvebu-uart: use a generic way to access the registers Miquel Raynal
2017-10-06 12:32 ` Gregory CLEMENT
2017-10-06 10:13 ` [PATCH 06/16] serial: mvebu-uart: add soft reset at probe Miquel Raynal
2017-10-06 12:33 ` Gregory CLEMENT
2017-10-06 10:13 ` [PATCH 07/16] serial: mvebu-uart: add function to change baudrate Miquel Raynal
2017-10-06 12:39 ` Gregory CLEMENT
2017-10-06 10:13 ` [PATCH 08/16] serial: mvebu-uart: clear state register before IRQ request Miquel Raynal
2017-10-06 12:40 ` Gregory CLEMENT
2017-10-06 10:13 ` [PATCH 09/16] serial: mvebu-uart: add TX interrupt trigger for pulse interrupts Miquel Raynal
2017-10-06 20:22 ` Gregory CLEMENT
2017-10-06 10:13 ` [PATCH 10/16] serial: mvebu-uart: dissociate RX and TX interrupts Miquel Raynal
2017-10-06 13:11 ` Gregory CLEMENT
2017-10-06 10:13 ` [PATCH 11/16] serial: mvebu-uart: augment the maximum number of ports Miquel Raynal
2017-10-06 12:45 ` Gregory CLEMENT
2017-10-06 10:13 ` [PATCH 12/16] serial: mvebu-uart: support extended port registers layout Miquel Raynal
2017-10-06 12:46 ` Gregory CLEMENT
2017-10-06 10:13 ` [PATCH 13/16] arm64: dts: marvell: armada-37xx: add UART clock Miquel Raynal
2017-10-06 12:48 ` Gregory CLEMENT
2017-10-06 10:13 ` [PATCH 14/16] arm64: dts: marvell: armada-37xx: add second UART port Miquel Raynal
2017-10-06 12:49 ` Gregory CLEMENT
2017-10-06 10:13 ` [PATCH 15/16] arm64: dts: marvell: armada-3720-db: enable " Miquel Raynal
2017-10-06 12:51 ` Gregory CLEMENT
2017-10-06 10:13 ` [PATCH 16/16] arm64: dts: marvell: armada-3720-espressobin: fill UART nodes Miquel Raynal
2017-10-06 13:01 ` Gregory CLEMENT [this message]
2017-10-06 13:15 ` Thomas Petazzoni
2017-10-09 7:30 ` Miquel RAYNAL
2017-10-12 11:24 ` Gregory CLEMENT
2017-10-13 7:01 ` Miquel RAYNAL
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