linux-kernel - Re: [PATCH v2 1/5] ARM: DT: STi: stihxxx-b2120: Add pulse-width properties to ssc2 & ssc3

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Message-ID: <20150828070124.GG4796@x1>
Date:	Fri, 28 Aug 2015 08:01:24 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Peter Griffin <peter.griffin@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	maxime.coquelin@...com, srinivas.kandagatla@...il.com,
	patrice.chotard@...com, mchehab@....samsung.com,
	devicetree@...r.kernel.org, linux-media@...r.kernel.org
Subject: Re: [PATCH v2 1/5] ARM: DT: STi: stihxxx-b2120: Add pulse-width
 properties to ssc2 & ssc3

On Thu, 27 Aug 2015, Peter Griffin wrote:

> Adding these properties makes the I2C bus to the demodulators much
> more reliable, and we no longer suffer from I2C errors when tuning.
> 
> Signed-off-by: Peter Griffin <peter.griffin@...aro.org>
> ---
>  arch/arm/boot/dts/stihxxx-b2120.dtsi | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)

Acked-by: Lee Jones <lee.jones@...aro.org>

> diff --git a/arch/arm/boot/dts/stihxxx-b2120.dtsi b/arch/arm/boot/dts/stihxxx-b2120.dtsi
> index f589fe4..62994ae 100644
> --- a/arch/arm/boot/dts/stihxxx-b2120.dtsi
> +++ b/arch/arm/boot/dts/stihxxx-b2120.dtsi
> @@ -27,12 +27,18 @@
>  			};
>  		};
>  
> -		i2c@...2000 {
> +		ssc2: i2c@...2000 {
>  			status = "okay";
> +			clock-frequency = <100000>;
> +			st,i2c-min-scl-pulse-width-us = <0>;
> +			st,i2c-min-sda-pulse-width-us = <5>;
>  		};
>  
> -		i2c@...3000 {
> +		ssc3: i2c@...3000 {
>  			status = "okay";
> +			clock-frequency = <100000>;
> +			st,i2c-min-scl-pulse-width-us = <0>;
> +			st,i2c-min-sda-pulse-width-us = <5>;
>  		};
>  
>  		i2c@...4000 {

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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