linux-kernel - Re: [PATCH v6 3/3] ARM: dts: at91: sama5d2 Xplained: add pin muxing for I2S

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Date:   Mon, 30 Jul 2018 16:49:53 +0300
From:   Claudiu Beznea <Claudiu.Beznea@...rochip.com>
To:     Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>,
        <nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>
CC:     <devicetree@...r.kernel.org>,
        Cyrille Pitchen <cyrille.pitchen@...el.com>,
        <Cristian.Birsan@...rochip.com>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v6 3/3] ARM: dts: at91: sama5d2 Xplained: add pin muxing
 for I2S

Hi Codrin,

On 30.07.2018 14:40, Codrin Ciubotariu wrote:
> From: Cyrille Pitchen <cyrille.pitchen@...el.com>
> 
> This patch sets the pin muxing for the I2S controllers
> 
> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@...el.com>
> [codrin.ciubotariu@...rochip.com: added pin muxing for the second
> controller]
> Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>
> ---
> 
> Changes in v6:
> 	- none;
> 
>  arch/arm/boot/dts/at91-sama5d2_xplained.dts | 28 +++++++++++++++++++++
>  1 file changed, 28 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/at91-sama5d2_xplained.dts b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
> index fcc85d70f36e..95cbec0f8790 100644
> --- a/arch/arm/boot/dts/at91-sama5d2_xplained.dts
> +++ b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
> @@ -281,6 +281,11 @@
>  				status = "okay";
>  			};
>  
> +			i2s0: i2s@...50000 {
> +				pinctrl-names = "default";
> +				pinctrl-0 = <&pinctrl_i2s0_default>;

The approach with the disabled controllers in board DTS files (for our
boards) is to use the: status = "disabled" and if there are pin conflicts
with other controllers to put a mark in there, something like:
				status = "disabled"; /* Conflict with X */

I'm seeing that i2s1 is in conflict with sdmmc1 and spi0.

Thank you,
Claudiu Beznea

> +			};
> +
>  			can0: can@...54000 {
>  				pinctrl-names = "default";
>  				pinctrl-0 = <&pinctrl_can0_default>;
> @@ -424,6 +429,24 @@
>  					bias-disable;
>  				};
>  
> +				pinctrl_i2s0_default: i2s0_default {
> +					pinmux = <PIN_PC1__I2SC0_CK>,
> +						 <PIN_PC2__I2SC0_MCK>,
> +						 <PIN_PC3__I2SC0_WS>,
> +						 <PIN_PC4__I2SC0_DI0>,
> +						 <PIN_PC5__I2SC0_DO0>;
> +					bias-disable;
> +				};
> +
> +				pinctrl_i2s1_default: i2s1_default {
> +					pinmux = <PIN_PA15__I2SC1_CK>,
> +						 <PIN_PA14__I2SC1_MCK>,
> +						 <PIN_PA16__I2SC1_WS>,
> +						 <PIN_PA17__I2SC1_DI0>,
> +						 <PIN_PA18__I2SC1_DO0>;
> +					bias-disable;
> +				};
> +
>  				pinctrl_key_gpio_default: key_gpio_default {
>  					pinmux = <PIN_PB9__GPIO>;
>  					bias-pull-up;
> @@ -546,6 +569,11 @@
>  				status = "okay";
>  			};
>  
> +			i2s1: i2s@...4c000 {
> +				pinctrl-names = "default";
> +				pinctrl-0 = <&pinctrl_i2s1_default>;
> +			};
> +
>  			can1: can@...50000 {
>  				pinctrl-names = "default";
>  				pinctrl-0 = <&pinctrl_can1_default>;
>