Subject: [v1 PATCH 1/4] Documentation: bindings: add dt doc for Rockchip USB Type-C PHY

From: [email-masked] (Chris Zhong)
Date: Wed, 8 Jun 2016 09:38:33 +0800

Hi Rob

On 06/07/2016 09:46 PM, Rob Herring wrote:
> On Mon, Jun 6, 2016 at 7:33 PM, Chris Zhong <[email-masked]> wrote:
>> Hi Rob
>>
>>
>> On 06/06/2016 10:27 PM, Rob Herring wrote:
>>> On Fri, Jun 03, 2016 at 11:15:08PM +0800, Chris Zhong wrote:
>>>> This patch adds a binding that describes the Rockchip USB Type-C PHY
>>>> for rk3399
>>>>
>>>> Signed-off-by: Chris Zhong <[email-masked]>
>>>>
>>>> ---
>>>>
>>>> Changes in v1:
>>>> - add extcon node description
>>>> - move the registers in phy driver
>>>> - remove the suffix of reset
>>>>
>>>>    .../devicetree/bindings/phy/phy-rockchip-typec.txt | 46
>>>> ++++++++++++++++++++++
>>>>    1 file changed, 46 insertions(+)
>>>>    create mode 100644
>>>> Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt
>>>> b/Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt
>>>> new file mode 100644
>>>> index 0000000..964e0f7
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt
>>>> @@ -0,0 +1,46 @@
>>>> +* ROCKCHIP type-c PHY
>>>> +---------------------
>>>> +
>>>> +Required properties:
>>>> + - compatible: should be "rockchip,rk3399-typec-phy0" or
>>>> +                        "rockchip,rk3399-typec-phy1"
>>> What's the difference between 0 and 1? If it is to handle the register
>>> offsets you have in the previous version and the phy blocks are
>>> identical, then the compatible strings should be the same.
>> yes, the registers are different between 0 and 1, and there is a grf
>> register(0x6268) for switch the phy 0 and phy 1
> But GRF is in a separate block and not part of the phy, right?
>
> Rob
The GRF is not a single function block, it contain many registers to 
control other block.
For Type-c phy, the type-c orientation, phy select, and some phy status 
registers are embedded in GRF
So the GRF is registered for a syscon driver, the phy driver call regmap 
to access the registers.