linux-kernel - Re: [PATCHv2 2/4] arm/dts: omap5-evm: Add tmp102 sensor support

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Date:	Tue, 14 Aug 2012 11:56:45 +0200
From:	Benoit Cousson <b-cousson@...com>
To:	Sourav Poddar <sourav.poddar@...com>
CC:	<linux-kernel@...r.kernel.org>,
	<devicetree-discuss@...ts.ozlabs.org>,
	<linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	Felipe Balbi <balbi@...com>,
	Santosh Shilimkar <santosh.shilimkar@...com>
Subject: Re: [PATCHv2 2/4] arm/dts: omap5-evm: Add tmp102 sensor support

On 08/13/2012 12:05 PM, Sourav Poddar wrote:
> Add tmp102 temperature sensor data in omap5 evm dts file.
> 
> Tested on omap5430 evm with 3.5 custom kernel.
> 
> Cc: Benoit Cousson <b-cousson@...com>
> Cc: Felipe Balbi <balbi@...com>
> Cc: Santosh Shilimkar <santosh.shilimkar@...com>
> Acked-by: Felipe Balbi <balbi@...com>
> Signed-off-by: Sourav Poddar <sourav.poddar@...com>
> ---
>  arch/arm/boot/dts/omap5-evm.dts |    9 +++++++++
>  1 files changed, 9 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/omap5-evm.dts b/arch/arm/boot/dts/omap5-evm.dts
> index 200c39a..45a8aeb 100644
> --- a/arch/arm/boot/dts/omap5-evm.dts
> +++ b/arch/arm/boot/dts/omap5-evm.dts
> @@ -18,3 +18,12 @@
>  		reg = <0x80000000 0x40000000>; /* 1 GB */
>  	};
>  };
> +
> +&i2c4 {
> +	clock-frequency = <400000>;

Have you checked if we cannot run at faster speed? Reducing the speed
will impact every devices on the bus.
It might be needed, I just wanted to be sure.

You should maybe just add a small comment to explain what the device is
doing with potentially a link to the HW spec if available.

The same comments are applicable to the bmp085 patch.

Regards,
Benoit

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