Hi Rob,
On 03/02/2016 12:26 PM, Rob Herring wrote:
> On Thu, Feb 25, 2016 at 04:36:36PM -0600, Franklin S Cooper Jr wrote:
>> From: Vignesh R <vigne...@ti.com>
>>
>> Add PWMSS device tree nodes for DRA7 SoC family and add documentation
>> for dt bindings.
>>
>> Signed-off-by: Vignesh R <vigne...@ti.com>
>> ---
>> Version 3 changes:
>> None
>>
>> .../devicetree/bindings/pwm/pwm-tiehrpwm.txt | 8 +++
>> .../devicetree/bindings/pwm/pwm-tipwmss.txt | 17 +++++-
>> arch/arm/boot/dts/dra7.dtsi | 64
>> ++++++++++++++++++++++
>> 3 files changed, 88 insertions(+), 1 deletion(-)
>>
>> diff --git a/Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt
>> b/Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt
>> index 9c100b2..25d91ae 100644
>> --- a/Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt
>> +++ b/Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt
>> @@ -4,6 +4,7 @@ Required properties:
>> - compatible: Must be "ti,<soc>-ehrpwm".
>> for am33xx - compatible = "ti,am33xx-ehrpwm";
>> for da850 - compatible = "ti,da850-ehrpwm", "ti,am33xx-ehrpwm";
>> + for dra7xx - compatible = "ti,dra7xx-ehrpwm", "ti,am33xx-ehrpwm";
> We're starting to push back on wildcards in compatible strings. I guess
> this is okay...
>
>> - #pwm-cells: should be 3. See pwm.txt in this directory for a description
>> of
>> the cells format. The only third cell flag supported by this binding is
>> PWM_POLARITY_INVERTED.
>> @@ -27,3 +28,10 @@ ehrpwm0: ehrpwm@0 { /* EHRPWM on da850 */
>> #pwm-cells = <3>;
>> reg = <0x300000 0x2000>;
>> };
>> +
>> +ehrpwm0: ehrpwm@0 { /* EHRPWM on dra7xx */
> Should be pwm@48440200
So the AM335x, AM437x and DA850 all use ehrpwm0:
ehrpwm@<address>. Also the address of 0 simply follows the
pattern used in the other binding examples in that doc. I
can replace the 0 address in this patch and make another
patch that fixes it for the other examples in that file. But
in terms of switching from ehrpwm0:ehrpwm@<address> to
ehrpwm0:pwm@<address> that would also require making changes
to the various dtsis also. So is it worth making that
change? If so I have no problem doing it.
>
>> + compatible = "ti,dra7xx-ehrpwm", "ti,am33xx-ehrpwm";
>> + #pwm-cells = <3>;
>> + reg = <0x48440200 0x80>;
>> + ti,hwmods = "ehrpwm0";
>> +};
