From: Sekhar Nori <nsekhar@ti.com>
To: Bartosz Golaszewski <bgolaszewski@baylibre.com>,
David Lechner <david@lechnology.com>,
Kevin Hilman <khilman@baylibre.com>,
Michael Turquette <mturquette@baylibre.com>,
Patrick Titiano <ptitiano@baylibre.com>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Russell King <linux@armlinux.org.uk>
Cc: <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 4/4] ARM: dts: da850-evm: add the UI expander node
Date: Mon, 20 Feb 2017 15:06:44 +0530 [thread overview]
Message-ID: <5f194c6d-0937-bac2-31cd-2f1658f68d0d@ti.com> (raw)
In-Reply-To: <1487268932-6469-5-git-send-email-bgolaszewski@baylibre.com>
On Thursday 16 February 2017 11:45 PM, Bartosz Golaszewski wrote:
> If we're using the UI board and want vpif capture, we need to select
> the video capture functionality by driving the sel_c pin low on the
> tca6416 expander and sel_a & sel_b pins high. Do it statically by
> hogging relevant GPIOs in the device tree.
>
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> ---
> arch/arm/boot/dts/da850-evm.dts | 27 +++++++++++++++++++++++++++
> 1 file changed, 27 insertions(+)
>
> diff --git a/arch/arm/boot/dts/da850-evm.dts b/arch/arm/boot/dts/da850-evm.dts
> index b549861..a90c764 100644
> --- a/arch/arm/boot/dts/da850-evm.dts
> +++ b/arch/arm/boot/dts/da850-evm.dts
> @@ -9,6 +9,7 @@
> */
> /dts-v1/;
> #include "da850.dtsi"
> +#include <dt-bindings/gpio/gpio.h>
>
> / {
> compatible = "ti,da850-evm", "ti,da850";
> @@ -78,7 +79,33 @@
> DRVDD-supply = <&vbat>;
> DVDD-supply = <&vbat>;
> };
> + ui_expander: tca6416@20 {
This should be called:
tca6416: gpio@20 {
in keeping with ePAPR 1.1 generic node names recommendation.
> + compatible = "ti,tca6416";
> + reg = <0x20>;
> + gpio-controller;
> + #gpio-cells = <2>;
>
> + sel_a {
> + gpio-hog;
> + gpios = <7 GPIO_ACTIVE_HIGH>;
> + output-high;
> + line-name = "sel_a";
> + };
> +
> + sel_b {
> + gpio-hog;
> + gpios = <6 GPIO_ACTIVE_HIGH>;
> + output-high;
> + line-name = "sel_b";
> + };
> +
> + sel_c {
> + gpio-hog;
> + gpios = <5 GPIO_ACTIVE_HIGH>;
> + output-low;
> + line-name = "sel_c";
I think this is better handled by using an enable-gpios property in vpif
capture device-tree node. So in the vpif capture node you would have:
enable-gpios = <&tca6416 7 GPIO_ACTIVE_HIGH
&tca6416 6 GPIO_ACTIVE_HIGH
&tca6416 5 GPIO_ACTIVE_LOW>;
and in the vpif capture driver, you would request each of these gpios
using: devm_gpiod_get_array_optional(.., .., GPIOD_OUT_HIGH);
Thanks,
Sekhar
next prev parent reply other threads:[~2017-02-20 9:39 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-16 18:15 [PATCH 0/4] ARM: dts: da850-evm: vpif DT changes Bartosz Golaszewski
2017-02-16 18:15 ` [PATCH 1/4] ARM: dts: da850-evm: fix whitespace errors Bartosz Golaszewski
2017-02-16 18:15 ` [PATCH 2/4] ARM: dts: da850: add vpif video display pins Bartosz Golaszewski
2017-02-20 10:29 ` Sekhar Nori
2017-02-20 15:42 ` Bartosz Golaszewski
2017-02-21 4:49 ` Sekhar Nori
2017-02-21 9:23 ` Bartosz Golaszewski
2017-02-22 5:59 ` Sekhar Nori
2017-02-16 18:15 ` [PATCH 3/4] ARM: dts: da850-evm: add the output port to the vpif node Bartosz Golaszewski
2017-02-16 18:15 ` [PATCH 4/4] ARM: dts: da850-evm: add the UI expander node Bartosz Golaszewski
2017-02-20 9:36 ` Sekhar Nori [this message]
2017-02-20 15:38 ` Bartosz Golaszewski
2017-02-21 5:03 ` Sekhar Nori
2017-02-21 9:22 ` Bartosz Golaszewski
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=5f194c6d-0937-bac2-31cd-2f1658f68d0d@ti.com \
--to=nsekhar@ti.com \
--cc=bgolaszewski@baylibre.com \
--cc=david@lechnology.com \
--cc=devicetree@vger.kernel.org \
--cc=khilman@baylibre.com \
--cc=laurent.pinchart@ideasonboard.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=mark.rutland@arm.com \
--cc=mturquette@baylibre.com \
--cc=ptitiano@baylibre.com \
--cc=robh+dt@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: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).