linux-kernel - Re: [PATCH 2/4] i2c: at91: update bindings documention

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Date:	Wed, 2 Dec 2015 12:04:18 +0100
From:	Nicolas Ferre <nicolas.ferre@...el.com>
To:	Ludovic Desroches <ludovic.desroches@...el.com>,
	<wsa@...-dreams.de>, <alexandre.belloni@...e-electrons.com>
CC:	<linux-i2c@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<plagnioj@...osoft.com>, <linux-arm-kernel@...ts.infradead.org>,
	<devicetree@...r.kernel.org>
Subject: Re: [PATCH 2/4] i2c: at91: update bindings documention

Le 02/12/2015 11:39, Ludovic Desroches a écrit :
> The i2c-sda-hold-time-ns property is supported from atmel,sama5d4-i2c.
> 
> Signed-off-by: Ludovic Desroches <ludovic.desroches@...el.com>
> ---
>  Documentation/devicetree/bindings/i2c/i2c-at91.txt | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/i2c/i2c-at91.txt b/Documentation/devicetree/bindings/i2c/i2c-at91.txt
> index 6e81dc1..67c6f2e 100644
> --- a/Documentation/devicetree/bindings/i2c/i2c-at91.txt
> +++ b/Documentation/devicetree/bindings/i2c/i2c-at91.txt
> @@ -3,7 +3,7 @@ I2C for Atmel platforms
>  Required properties :
>  - compatible : Must be "atmel,at91rm9200-i2c", "atmel,at91sam9261-i2c",
>       "atmel,at91sam9260-i2c", "atmel,at91sam9g20-i2c", "atmel,at91sam9g10-i2c",
> -     "atmel,at91sam9x5-i2c" or "atmel,sama5d2-i2c"
> +     "atmel,at91sam9x5-i2c", "atmel,sama5d4-i2c" or "atmel,sama5d2-i2c"
>  - reg: physical base address of the controller and length of memory mapped
>       region.
>  - interrupts: interrupt number to the cpu.
> @@ -17,6 +17,7 @@ Optional properties:
>  - dma-names: should contain "tx" and "rx".
>  - atmel,fifo-size: maximum number of data the RX and TX FIFOs can store for FIFO
>    capable I2C controllers.
> +- i2c-sda-hold-time-ns: TWD hold time, only available from "atmel,sama5d4-i2c".

Yep, but you must make it clearer that sama5d2 also has this property
available: people usually don't know that sama5d2 comes after sama5d4
over time...

Bye,

>  - Child nodes conforming to i2c bus binding
>  
>  Examples :
> @@ -52,6 +53,7 @@ i2c0: i2c@...34600 {
>  	#size-cells = <0>;
>  	clocks = <&flx0>;
>  	atmel,fifo-size = <16>;
> +	i2c-sda-hold-time-ns = <336>;
>  
>  	wm8731: wm8731@1a {
>  		compatible = "wm8731";
> 


-- 
Nicolas Ferre
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