On Tuesday 28 February 2017 04:22 AM, Rob Herring wrote: > On Wed, Feb 22, 2017 at 02:43:47PM +0100, Bartosz Golaszewski wrote: >> Add an optional property - enable-gpios - which can be used to specify >> the GPIOs that must be requested to select the vpif functionality. >> >> Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx> >> --- >> Documentation/devicetree/bindings/media/ti,da850-vpif.txt | 7 +++++++ >> 1 file changed, 7 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/media/ti,da850-vpif.txt b/Documentation/devicetree/bindings/media/ti,da850-vpif.txt >> index df7182a..23c5405 100644 >> --- a/Documentation/devicetree/bindings/media/ti,da850-vpif.txt >> +++ b/Documentation/devicetree/bindings/media/ti,da850-vpif.txt >> @@ -13,6 +13,9 @@ Required properties: >> - reg: physical base address and length of the registers set for the device; >> - interrupts: should contain IRQ line for the VPIF >> >> +Optional properties: >> +- enable-gpios: phandle of the GPIOs used to select the vpif functionality > > What does this control exactly? The GPIOs belong in the node they are > connected to and having GPIOs routed to this block seems strange. The DA850 EVM board implements on-board muxing which lets the video input (via VPIF) to be routed to a TVP5147 (video decoder) for composite input or to a camera header. There are other mux options which use the same VPIF SoC pins (RMII ethernet or character LCD). There is a three-to-eight demux on the board which drives enable signals to buffers letting you choose from these options. >From your response, it looks like you want the enable-gpios property to be in the TVP5147 or camera node. That does make sense to me. > > There are inputs or outputs? These GPIOs are driving a 3-to-8 demux so they are all outputs. Thanks, Sekhar -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
