[PATCH 1/2] DT: net: davinci_emac: "ti, davinci-rmii-en" property is actually optional

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[PATCH 1/2] DT: net: davinci_emac: "ti, davinci-rmii-en" property is actually optional

Sergei Shtylyov-3
Though described as required, the "ti,davinci-rmii-en" property for the DaVinci
EMAC binding seems actually optional, as the driver should happily work without
it; the property is not specified either  in the example device node or in the
actual EMAC device node for DA850 device tree, only AM3517 one.

While at it, document the property better...

Signed-off-by: Sergei Shtylyov <[hidden email]>

---
Actually I think this property should have been boolean...

 Documentation/devicetree/bindings/net/davinci_emac.txt |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: net/Documentation/devicetree/bindings/net/davinci_emac.txt
===================================================================
--- net.orig/Documentation/devicetree/bindings/net/davinci_emac.txt
+++ net/Documentation/devicetree/bindings/net/davinci_emac.txt
@@ -10,7 +10,6 @@ Required properties:
 - ti,davinci-ctrl-mod-reg-offset: offset to control module register
 - ti,davinci-ctrl-ram-offset: offset to control module ram
 - ti,davinci-ctrl-ram-size: size of control module ram
-- ti,davinci-rmii-en: use RMII
 - ti,davinci-no-bd-ram: has the emac controller BD RAM
 - interrupts: interrupt mapping for the davinci emac interrupts sources:
               4 sources: <Receive Threshold Interrupt
@@ -22,6 +21,7 @@ Optional properties:
 - phy-handle: Contains a phandle to an Ethernet PHY.
               If absent, davinci_emac driver defaults to 100/FULL.
 - local-mac-address : 6 bytes, mac address
+- ti,davinci-rmii-en: 1 byte, 1 means use RMII
 
 Example (enbw_cmc board):
  eth0: emac@1e20000 {
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Re: [PATCH 1/2] DT: net: davinci_emac: "ti, davinci-rmii-en" property is actually optional

Florian Fainelli-2
2014-01-27 Sergei Shtylyov <[hidden email]>:

> Though described as required, the "ti,davinci-rmii-en" property for the DaVinci
> EMAC binding seems actually optional, as the driver should happily work without
> it; the property is not specified either  in the example device node or in the
> actual EMAC device node for DA850 device tree, only AM3517 one.
>
> While at it, document the property better...
>
> Signed-off-by: Sergei Shtylyov <[hidden email]>
>
> ---
> Actually I think this property should have been boolean...
>
>  Documentation/devicetree/bindings/net/davinci_emac.txt |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> Index: net/Documentation/devicetree/bindings/net/davinci_emac.txt
> ===================================================================
> --- net.orig/Documentation/devicetree/bindings/net/davinci_emac.txt
> +++ net/Documentation/devicetree/bindings/net/davinci_emac.txt
> @@ -10,7 +10,6 @@ Required properties:
>  - ti,davinci-ctrl-mod-reg-offset: offset to control module register
>  - ti,davinci-ctrl-ram-offset: offset to control module ram
>  - ti,davinci-ctrl-ram-size: size of control module ram
> -- ti,davinci-rmii-en: use RMII
>  - ti,davinci-no-bd-ram: has the emac controller BD RAM
>  - interrupts: interrupt mapping for the davinci emac interrupts sources:
>                4 sources: <Receive Threshold Interrupt
> @@ -22,6 +21,7 @@ Optional properties:
>  - phy-handle: Contains a phandle to an Ethernet PHY.
>                If absent, davinci_emac driver defaults to 100/FULL.
>  - local-mac-address : 6 bytes, mac address
> +- ti,davinci-rmii-en: 1 byte, 1 means use RMII

This just made me look at the actual DT binding documentation and the
driver, but there is support for specifying a PHY device tree node,
but no corresponding 'phy-connection-type' property which would tell
whether the connection is Reduced MII, MII or something else.
'phy-connection-type' would convey much more information about what is
happening, and once know, should also make the driver automatically
configure for Reduced MII or anything else, hence making
"ti,davinc-rmii-en" obsolete.
--
Florian
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