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 _______________________________________________ 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 14:47 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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