On 08/14/2013 11:41 AM, Benoit Cousson wrote:
> Hi Roger,
>
> On 01/08/2013 16:05, Roger Quadros wrote:
>> Split otghs_ctrl and USB2 PHY power down into separate
>> omap-control-usb nodes. Update ti,mode property.
>
> Nit: I guess you mean ti,type?
Right :).
>
>> CC: Benoit Cousson <benoit.cousson@xxxxxxxxxx>
>> Signed-off-by: Roger Quadros <rogerq@xxxxxx>
>> ---
>> arch/arm/boot/dts/omap4.dtsi | 17 ++++++++++++-----
>> 1 files changed, 12 insertions(+), 5 deletions(-)
>>
>> diff --git a/arch/arm/boot/dts/omap4.dtsi b/arch/arm/boot/dts/omap4.dtsi
>> index 22d9f2b..9a6fa27 100644
>> --- a/arch/arm/boot/dts/omap4.dtsi
>> +++ b/arch/arm/boot/dts/omap4.dtsi
>> @@ -519,7 +519,7 @@
>> usb2_phy: usb2phy@4a0ad080 {
>> compatible = "ti,omap-usb2";
>> reg = <0x4a0ad080 0x58>;
>> - ctrl-module = <&omap_control_usb>;
>> + ctrl-module = <&omap_control_usb2phy>;
>> };
>> };
>>
>> @@ -643,11 +643,17 @@
>> };
>> };
>>
>> - omap_control_usb: omap-control-usb@4a002300 {
>> + omap_control_usb2phy: omap-control-usb@4a002300 {
>> compatible = "ti,omap-control-usb";
>> - reg = <0x4a002300 0x4>,
>> - <0x4a00233c 0x4>;
>> - reg-names = "control_dev_conf", "otghs_control";
>> + reg = <0x4a002300 0x4>;
>> + reg-names = "power";
>> + ti,type = <2>;
>
> Now that we can use the C preprocessor, it will be nice to use a macro instead of the value.
>
> TYPE1 - if it has otghs_control mailbox register (e.g. on OMAP4)
> TYPE2 - if it has Power down bit in control_dev_conf register. e.g. USB2 PHY
> TYPE3 - if it has DPLL and individual Rx & Tx power control. e.g. USB3 PHY or SATA PHY
> TYPE4 - if it has both power down and power aux registers. e.g. USB2 PHY on DRA7
>
> Well, assuming you can find macro names that can explain a little bit what the type is about :-)
>
> That being said...
> Do you really need to expose the type here? Maybe with just a set of different compatible string you can figure out in the driver what type we are talking about.
> It is always better to minimize the amount of information we put in DT as soon as we can infer it from the compatible string.
>
> So instead of using a generic "ti,omap-control-usb" string + "ti,type" you can potentially use several specific strings: ti,omap4-control-usb, ti,dra7-control-usb...
> Since the DT gurus are recommending to use specific compatible string as much as possible, this is maybe a better approach.
>
Good point. I'll get rid of the type altogether and use the compatible string instead.
cheers,
-roger
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