linux-kernel - Re: [PATCH net-next v2 3/3] devicetree: add devicetree bindings for cc2520 driver

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Date:	Wed, 18 Jun 2014 14:41:10 +0530
From:	Varka Bhadram <varkabhadram@...il.com>
To:	Mark Rutland <mark.rutland@....com>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"alex.bluesman.smirnov@...il.com" <alex.bluesman.smirnov@...il.com>,
	"dbaryshkov@...il.com" <dbaryshkov@...il.com>,
	"linux-zigbee-devel@...ts.sourceforge.net" 
	<linux-zigbee-devel@...ts.sourceforge.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Varka Bhadram <varkab@...c.in>
Subject: Re: [PATCH net-next v2 3/3] devicetree: add devicetree bindings for
 cc2520 driver

Hi,

On 06/18/2014 02:35 PM, Mark Rutland wrote:
> On Wed, Jun 18, 2014 at 06:16:05AM +0100, Varka Bhadram wrote:
>> devicetree bindings for cc2520 radio driver.
>>
>> Signed-off-by: Varka Bhadram <varkab@...c.in>
>> ---
>>   .../devicetree/bindings/net/ieee802154/cc2520.txt  |   26 ++++++++++++++++++++
>>   1 file changed, 26 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/net/ieee802154/cc2520.txt
>>
>> diff --git a/Documentation/devicetree/bindings/net/ieee802154/cc2520.txt b/Documentation/devicetree/bindings/net/ieee802154/cc2520.txt
>> new file mode 100644
>> index 0000000..f0a749d
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/net/ieee802154/cc2520.txt
>> @@ -0,0 +1,26 @@
>> +CC2520 IEEE 802.15.4 Compatible Radio
>> +
>> +Required properties:
>> +	- compatible:		should be "ti,cc2520"
>> +	- spi-max-frequency:	maximal bus speed (8000000), should be set to 4000000 depends
>> +				sync or async operation mode
>> +	- reg:			the chipselect index
>> +	- mode:			SPI mode
> What exactly is this property? It doesn't seem to be used by the driver,
> the example is opaque, and this doesn't seem to match any existing
> bindings (a grep for "mode" in Documentation/devicetree/bindings/spi
> only found me a string "mode" property).
>
> The example has several properties (the GPIOs and pinctrl) not listed
> here...

Previously is used this 'mode' property to set the SPI mode. but i am not using now. I will remove it.
And also i will add the optional properties GPIO and pinctrl in next version.

Thanks for comments.

-Varka Bhadram.

>
> Mark.
>
>> +Example:
>> +
>> +	cc2520@0 {
>> +		compatible = "ti,cc2520";
>> +		reg = <0>;
>> +		spi-max-frequency = <4000000>;
>> +		mode = <1>;
>> +
>> +		pinctrl-names = "default";
>> +		pinctrl-0 = <&cc2520_cape_pins>;	/*GPIO pin muxing details*/
>> +
>> +		fifo-gpio = <&gpio1 18 0>;
>> +		fifop-gpio = <&gpio1 19 0>;
>> +		sfd-gpio = <&gpio1 13 0>;
>> +		cca-gpio = <&gpio1 16 0>;
>> +		vreg-gpio = <&gpio0 31 0>;
>> +		reset-gpio = <&gpio1 12 0>;
>> +	};
>> -- 
>> 1.7.9.5
>>
>> --
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