linux-kernel - Re: [RESEND/PATCHv3] arm: dts: omap5-evm: Add keypad support

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Date:	Tue, 30 Oct 2012 10:56:04 +0530
From:	Sourav <sourav.poddar@...com>
To:	Benoit Cousson <b-cousson@...com>
CC:	<linux-omap@...r.kernel.org>,
	<devicetree-discuss@...ts.ozlabs.org>,
	<linux-kernel@...r.kernel.org>, Felipe Balbi <balbi@...com>,
	Santosh Shilimkar <santosh.shilimkar@...com>
Subject: Re: [RESEND/PATCHv3] arm: dts: omap5-evm: Add keypad support

Hi Benoit,
On Monday 29 October 2012 10:14 PM, Benoit Cousson wrote:
> Hi Sourav,
>
> On 10/29/2012 11:40 AM, Sourav Poddar wrote:
>> Add keypad data node in omap5-evm.
>>
>> Based on I2C support patch for omap5, which has been
>> already posted as a different series.
>>
>> Tested on omap5430 evm with 3.7-rc1 kernel.
>>
>> Cc: Felipe Balbi <balbi@...com>
>> Cc: Santosh Shilimkar <santosh.shilimkar@...com>
>>
>> Tested on omap5430 sdp with 3.7-rc1 kernel.
>>
>> Signed-off-by: Sourav Poddar <sourav.poddar@...com>
>> ---
>>   arch/arm/boot/dts/omap5-evm.dts |   95 +++++++++++++++++++++++++++++++++++++++
>>   1 files changed, 95 insertions(+), 0 deletions(-)
>>
>> diff --git a/arch/arm/boot/dts/omap5-evm.dts b/arch/arm/boot/dts/omap5-evm.dts
>> index c663eba..b812d6d 100644
>> --- a/arch/arm/boot/dts/omap5-evm.dts
>> +++ b/arch/arm/boot/dts/omap5-evm.dts
>> @@ -140,3 +140,98 @@
>>   &mcbsp3 {
>>   	status = "disabled";
>>   };
>> +
>> +&i2c5 {
>> +	clock-frequency = <400000>;
>> +
>> +	smsc@38 {
>> +		compatible = "smscece1099";
>> +		reg = <0x38>;
>> +		clock = <0x13>;
> What does that "clock" mean?
This chip supports a clock control register which is used to enable the
interface used by the chip to communicate. Here, the interface which you 
can are
SMBUS interface or BC-LINK interface.
> I cannot find that in the binding documentation. BTW, did you add that
> documentation in the driver patch?
Nope, I missed out on the dt binding documentation for the driver. :(

Will send a seperate patch for the bindings.
> Regards,
> Benoit
>

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