From: Kamel Bouhara <kamel.bouhara@bootlin.com>
To: Wolfram Sang <wsa@the-dreams.de>,
linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org,
Nicolas Ferre <nicolas.ferre@microchip.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Ludovic Desroches <ludovic.desroches@microchip.com>,
linux-arm-kernel@lists.infradead.org
Cc: devicetree@vger.kernel.org,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
Kamel Bouhara <kamel.bouhara@bootlin.com>
Subject: [PATCH 1/4] dt-bindings: i2c: at91: document optional bus recovery properties
Date: Wed, 2 Oct 2019 16:46:55 +0200 [thread overview]
Message-ID: <20191002144658.7718-2-kamel.bouhara@bootlin.com> (raw)
In-Reply-To: <20191002144658.7718-1-kamel.bouhara@bootlin.com>
The at91 I2C controller can support bus recovery by re-assigning SCL
and SDA to gpios. Add the optional pinctrl and gpio properties to do
so.
Signed-off-by: Kamel Bouhara <kamel.bouhara@bootlin.com>
---
Documentation/devicetree/bindings/i2c/i2c-at91.txt | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/Documentation/devicetree/bindings/i2c/i2c-at91.txt b/Documentation/devicetree/bindings/i2c/i2c-at91.txt
index b7cec17c3daf..8ea2ce5d8610 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-at91.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-at91.txt
@@ -19,8 +19,13 @@ Optional properties:
capable I2C controllers.
- i2c-sda-hold-time-ns: TWD hold time, only available for "atmel,sama5d4-i2c"
and "atmel,sama5d2-i2c".
+- scl-gpios: specify the gpio related to SCL pin
+- sda-gpios: specify the gpio related to SDA pin
+- pinctrl: add extra pinctrl to configure i2c pins to gpio function for i2c
+ bus recovery, call it "gpio" state
- Child nodes conforming to i2c bus binding
+
Examples :
i2c0: i2c@fff84000 {
@@ -55,6 +60,11 @@ i2c0: i2c@f8034600 {
clocks = <&flx0>;
atmel,fifo-size = <16>;
i2c-sda-hold-time-ns = <336>;
+ pinctrl-names = "default", "gpio";
+ pinctrl-0 = <&pinctrl_i2c0>;
+ pinctrl-1 = <&pinctrl_i2c0_gpio>;
+ sda-gpios = <&pioA 30 GPIO_ACTIVE_HIGH>;
+ scl-gpios = <&pioA 31 GPIO_ACTIVE_HIGH>;
wm8731: wm8731@1a {
compatible = "wm8731";
--
2.23.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-10-02 14:48 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-02 14:46 [PATCH 0/4] i2c bus recovery for Microchip SoCs Kamel Bouhara
2019-10-02 14:46 ` Kamel Bouhara [this message]
2019-10-02 14:46 ` [PATCH 2/4] i2c: at91: implement i2c bus recovery Kamel Bouhara
2019-10-04 9:35 ` Claudiu.Beznea
2019-10-04 20:39 ` Uwe Kleine-König
2019-10-07 10:17 ` Claudiu.Beznea
2019-10-09 13:55 ` Ludovic Desroches
2019-10-09 14:01 ` Alexandre Belloni
2019-10-10 6:54 ` Ludovic Desroches
2019-10-24 12:29 ` Kamel Bouhara
2019-10-25 7:04 ` Ludovic.Desroches
2019-10-21 20:20 ` Wolfram Sang
2019-10-22 7:59 ` Kamel Bouhara
2019-10-24 14:08 ` Codrin.Ciubotariu
2019-10-24 15:07 ` Wolfram Sang
2019-10-25 1:14 ` Phil Reid
2020-08-25 13:28 ` Wolfram Sang
2020-08-25 23:44 ` Phil Reid
2019-10-02 14:46 ` [PATCH 3/4] ARM: at91/dt: sama5d3: add i2c gpio pinctrl Kamel Bouhara
2019-10-02 14:46 ` [PATCH 4/4] ARM: at91/dt: sama5d4: " Kamel Bouhara
2019-10-15 19:10 ` [PATCH 0/4] i2c bus recovery for Microchip SoCs Rob Herring
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=20191002144658.7718-2-kamel.bouhara@bootlin.com \
--to=kamel.bouhara@bootlin.com \
--cc=alexandre.belloni@bootlin.com \
--cc=devicetree@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-i2c@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=ludovic.desroches@microchip.com \
--cc=nicolas.ferre@microchip.com \
--cc=thomas.petazzoni@bootlin.com \
--cc=wsa@the-dreams.de \
/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).