Subject: [PATCHv5 22/31] CLK: TI: add interface clock support for OMAP3

From: [email-masked] (Tero Kristo)
Date: Mon, 19 Aug 2013 16:54:28 +0300

On 08/13/2013 02:30 PM, Mark Rutland wrote:
> On Fri, Aug 02, 2013 at 05:25:41PM +0100, Tero Kristo wrote:
>> OMAP3 has interface clocks in addition to functional clocks, which
>> require special handling for the autoidle and idle status register
>> offsets mainly.
>>
>> Signed-off-by: Tero Kristo <[email-masked]>
>> ---
>>   .../devicetree/bindings/clock/ti/interface.txt     |   45 +++++++++
>>   arch/arm/mach-omap2/clock.h                        |    6 --
>>   drivers/clk/ti/Makefile                            |    2 +-
>>   drivers/clk/ti/interface.c                         |  105 ++++++++++++++++++++
>>   include/linux/clk/ti.h                             |    7 ++
>>   5 files changed, 158 insertions(+), 7 deletions(-)
>>   create mode 100644 Documentation/devicetree/bindings/clock/ti/interface.txt
>>   create mode 100644 drivers/clk/ti/interface.c
>>
>> diff --git a/Documentation/devicetree/bindings/clock/ti/interface.txt b/Documentation/devicetree/bindings/clock/ti/interface.txt
>> new file mode 100644
>> index 0000000..8b09ae7
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/clock/ti/interface.txt
>> @@ -0,0 +1,45 @@
>> +Binding for Texas Instruments interface clock.
>> +
>> +This binding uses the common clock binding[1]. This clock is
>> +quite much similar to the basic gate-clock [2], however,
>> +it supports a number of additional features, including
>> +companion clock finding (match corresponding functional gate
>> +clock) and hardware autoidle enable / disable.
>> +
>> +[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
>> +[2] Documentation/devicetree/bindings/clock/gate-clock.txt
>> +
>> +Required properties:
>> +- compatible : shall be "ti,interface-clock"
>
> It might make sense to be more specific: "ti,omap3-interface-clock".

Ok.

>
>> +- #clock-cells : from common clock binding; shall be set to 0
>> +- clocks : link to phandle of parent clock
>> +- reg : base address for the control register
>> +
>> +Optional properties:
>> +- ti,enable-bit : bit shift for the bit enabling/disabling the clock
>> +		  (default 0)
>> +- ti,iclk-no-wait : flag for selecting non-waiting hw-ops
>> +- ti,iclk-hsotgusb : flag for selecting hsotgusb hw-ops
>> +- ti,iclk-dss : flag for selecting DSS interface clock hw-ops
>> +- ti,iclk-ssi : flag for selecting SSI interface clock hw-ops
>> +- ti,am35xx-clk : flag for selecting AM35xx interface clock hw-ops
>
> I think these should be selected based on the compatible string. They're
> mutually exclusive, and incompatible.

Ok, I'll change this for next rev so that each has its own compatible 
string.

Thanks for your comments Mark.

-Tero