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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


WARNING: multiple messages have this Message-ID (diff)
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


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  reply	other threads:[~2019-10-02 14:47 UTC|newest]

Thread overview: 45+ 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
2019-10-02 14:46 ` Kamel Bouhara [this message]
2019-10-02 14:46   ` [PATCH 1/4] dt-bindings: i2c: at91: document optional bus recovery properties Kamel Bouhara
2019-10-02 14:46 ` [PATCH 2/4] i2c: at91: implement i2c bus recovery Kamel Bouhara
2019-10-02 14:46   ` Kamel Bouhara
2019-10-04  9:35   ` Claudiu.Beznea
2019-10-04  9:35     ` Claudiu.Beznea
2019-10-04  9:35     ` Claudiu.Beznea
2019-10-04 20:39     ` Uwe Kleine-König
2019-10-04 20:39       ` Uwe Kleine-König
2019-10-07 10:17       ` Claudiu.Beznea
2019-10-07 10:17         ` Claudiu.Beznea
2019-10-07 10:17         ` Claudiu.Beznea
2019-10-09 13:55   ` Ludovic Desroches
2019-10-09 13:55     ` Ludovic Desroches
2019-10-09 13:55     ` Ludovic Desroches
2019-10-09 14:01     ` Alexandre Belloni
2019-10-09 14:01       ` Alexandre Belloni
2019-10-10  6:54       ` Ludovic Desroches
2019-10-10  6:54         ` Ludovic Desroches
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
2019-10-21 20:20     ` Wolfram Sang
2019-10-22  7:59     ` Kamel Bouhara
2019-10-24 14:08       ` Codrin.Ciubotariu
2019-10-24 14:08         ` Codrin.Ciubotariu
2019-10-24 14:08         ` Codrin.Ciubotariu
2019-10-24 15:07         ` Wolfram Sang
2019-10-24 15:07           ` Wolfram Sang
2019-10-25  1:14           ` Phil Reid
2019-10-25  1:14             ` Phil Reid
2019-10-25  1:14             ` Phil Reid
2020-08-25 13:28             ` Wolfram Sang
2020-08-25 13:28               ` Wolfram Sang
2020-08-25 23:44               ` Phil Reid
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   ` Kamel Bouhara
2019-10-02 14:46 ` [PATCH 4/4] ARM: at91/dt: sama5d4: " Kamel Bouhara
2019-10-02 14:46   ` Kamel Bouhara
2019-10-15 19:10 ` [PATCH 0/4] i2c bus recovery for Microchip SoCs Rob Herring
2019-10-15 19:10   ` Rob Herring

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