Re: [PATCH v3 1/5] dt-bindings: media: adv7604: Add support for i2c_new_secondary_device

Laurent Pinchart
2018-02-13T13:29:39Z

Hi Kieran,

On Tuesday, 13 February 2018 15:14:43 EET Kieran Bingham wrote:
> On 13/02/18 12:06, Laurent Pinchart wrote:
> > On Tuesday, 13 February 2018 00:07:49 EET Kieran Bingham wrote:
> >> From: Jean-Michel Hautbois <jean-michel.hautbois@vodalys.com>
> >>
> >> The ADV7604 has thirteen 256-byte maps that can be accessed via the main
> >> I²C ports. Each map has it own I²C address and acts as a standard slave
> >> device on the I²C bus.
> >>
> >> Extend the device tree node bindings to be able to override the default
> >> addresses so that address conflicts with other devices on the same bus
> >> may be resolved at the board description level.
> >>
> >> Signed-off-by: Jean-Michel Hautbois <jean-michel.hautbois@vodalys.com>
> >> [Kieran: Re-adapted for mainline]
> >> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> >> Reviewed-by: Rob Herring <robh@kernel.org>
> >
> > Nitpicking, I might not mention i2c_new_secondary_device in the subject,
> > as this is a DT bindings change. I don't mind too much though, as long as
> > the bindings themselves don't contain Linux-specific information, and they
> > don't, so
>
> How about: ... adv7604: Extend bindings to allow specifying slave map
> addresses

Sounds good to me.

> > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
>
> Collected, thanks.
>
> --
> Kieran
>
> >> ---
> >>
> >> Based upon the original posting :
> >> https://lkml.org/lkml/2014/10/22/469
> >>
> >> v2:
> >> - DT Binding update separated from code change
> >> - Minor reword to commit message to account for DT only change.
> >> - Collected Rob's RB tag.
> >>
> >> v3:
> >> - Split map register addresses into individual declarations.
> >>
> >> .../devicetree/bindings/media/i2c/adv7604.txt | 18
> >>
> >> ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/Documentation/devicetree/bindings/media/i2c/adv7604.txt
> >> b/Documentation/devicetree/bindings/media/i2c/adv7604.txt index
> >> 9cbd92eb5d05..ebb5f070c05b 100644
> >> --- a/Documentation/devicetree/bindings/media/i2c/adv7604.txt
> >> +++ b/Documentation/devicetree/bindings/media/i2c/adv7604.txt
> >>
> >> @@ -13,7 +13,11 @@ Required Properties:
> >> - "adi,adv7611" for the ADV7611
> >> - "adi,adv7612" for the ADV7612
> >>
> >> - - reg: I2C slave address
> >> + - reg: I2C slave addresses
> >> + The ADV76xx has up to thirteen 256-byte maps that can be accessed
> >> via
> >> the + main I²C ports. Each map has it own I²C address and acts as a
> >> standard + slave device on the I²C bus. The main address is mandatory,
> >> others are + optional and revert to defaults if not specified.
> >>
> >> - hpd-gpios: References to the GPIOs that control the HDMI hot-plug
> >>
> >> detection pins, one per HDMI input. The active flag indicates the
> >> GPIO
> >>
> >> @@ -35,6 +39,11 @@ Optional Properties:
> >> - reset-gpios: Reference to the GPIO connected to the device's reset
> >> pin.
> >>
> >> - default-input: Select which input is selected after reset.
> >> + - reg-names : Names of maps with programmable addresses.
> >> + It can contain any map needing a non-default address.
> >> + Possible maps names are :
> >> + "main", "avlink", "cec", "infoframe", "esdp", "dpp", "afe",
> >> + "rep", "edid", "hdmi", "test", "cp", "vdp"
> >>
> >> Optional Endpoint Properties:
> >> @@ -52,7 +61,12 @@ Example:
> >> hdmi_receiver@4c {
> >>
> >> compatible = "adi,adv7611";
> >>
> >> - reg = <0x4c>;
> >> + /*
> >> + * The edid page will be accessible @ 0x66 on the i2c bus. All
> >> + * other maps will retain their default addresses.
> >> + */
> >> + reg = <0x4c>, <0x66>;
> >> + reg-names "main", "edid";
> >>
> >> reset-gpios = <&ioexp 0 GPIO_ACTIVE_LOW>;
> >> hpd-gpios = <&ioexp 2 GPIO_ACTIVE_HIGH>;

--
Regards,

Laurent Pinchart