On Wed, Oct 14, 2020 at 10:31 AM Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx> wrote: > > On Wed, Oct 14, 2020 at 10:10:18AM +0800, Dongchun Zhu wrote: > > Hello Sakari, > > > > Thanks for your timely review. > > > > On Tue, 2020-10-13 at 19:19 +0300, Sakari Ailus wrote: > > > Hi Dongchun, > > > > > > On Tue, Oct 13, 2020 at 09:05:02PM +0800, Dongchun Zhu wrote: > > > > Add YAML device tree binding for OV02A10 CMOS image sensor, and the > > > > relevant MAINTAINERS entries. > > > > > > > > Signed-off-by: Dongchun Zhu <dongchun.zhu@xxxxxxxxxxxx> > > > > --- > > > > .../bindings/media/i2c/ovti,ov02a10.yaml | 162 +++++++++++++++++++++ > > > > MAINTAINERS | 7 + > > > > 2 files changed, 169 insertions(+) > > > > create mode 100644 Documentation/devicetree/bindings/media/i2c/ovti,ov02a10.yaml > > > > > > > > [snip]... > > > > > > + ovti,mipi-clock-voltage: > > > > + description: > > > > + An array of 2-tuples items, and each item consists of link frequency and > > > > + MIPI clock voltage unit like <freq-kHz volt-unit>. Clock voltage unit is > > > > + dependent upon link speed, indicating MIPI transmission speed select that > > > > + controls D-PHY timing setting by adjusting MIPI clock voltage to improve > > > > + the clock driver capability. > > > > + $ref: "/schemas/types.yaml#/definitions/uint32-array" > > > > + minItems: 2 > > > > + default: [390000, 4] > > > > > > Why do you have the link frequency here as well? > > > > > > In principle this does belong to the endpoint as link frequencies are > > > specific to that, but I don't mind; there's just a single port anyway. > > > > > > > This is an optional property which we model as an array of <link speed, > > clock voltage> pairs. An example to have all link speeds up to 390MHz > > use the value 4 for current driver. If one wants to select different > > voltage for different link, they could do so as well. > > If you think you'd need that, then you need to put this to the endpoint. The mipi-clock-voltage property is not a property of the endpoint. The link frequency there does not set the link frequency - it only specifies which link frequency the given voltage should be used for. Best regards, Tomasz
