[PATCH] dt-bindings: fec: Make the phy-reset-gpio polarity explicit

[PATCH] dt-bindings: fec: Make the phy-reset-gpio polarity explicit

[Fabio Estevam]

From: Fabio Estevam <fabio.estevam@nxp.com>

The GPIO polarity passed to phy-reset-gpio is ignored by the FEC
driver and it is assumed to be active low.

It can be active high only when the 'phy-reset-active-high' property
is present.

The current examples pass active high polarity and work fine, but
in order to improve the documentation make it explicit what the real
polarity is.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
---
 Documentation/devicetree/bindings/net/fsl-fec.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/fsl-fec.txt b/Documentation/devicetree/bindings/net/fsl-fec.txt
index f0dc944..2d41fb9 100644
--- a/Documentation/devicetree/bindings/net/fsl-fec.txt
+++ b/Documentation/devicetree/bindings/net/fsl-fec.txt
@@ -59,7 +59,7 @@ ethernet@83fec000 {
 	reg = <0x83fec000 0x4000>;
 	interrupts = <87>;
 	phy-mode = "mii";
-	phy-reset-gpios = <&gpio2 14 0>; /* GPIO2_14 */
+	phy-reset-gpios = <&gpio2 14 GPIO_ACTIVE_LOW>; /* GPIO2_14 */
 	local-mac-address = [00 04 9F 01 1B B9];
 	phy-supply = <&reg_fec_supply>;
 };
@@ -71,7 +71,7 @@ ethernet@83fec000 {
 	reg = <0x83fec000 0x4000>;
 	interrupts = <87>;
 	phy-mode = "mii";
-	phy-reset-gpios = <&gpio2 14 0>; /* GPIO2_14 */
+	phy-reset-gpios = <&gpio2 14 GPIO_ACTIVE_LOW>; /* GPIO2_14 */
 	local-mac-address = [00 04 9F 01 1B B9];
 	phy-supply = <&reg_fec_supply>;
 	phy-handle = <&ethphy>;
-- 
2.7.4

RE: [PATCH] dt-bindings: fec: Make the phy-reset-gpio polarity explicit

[Andy Duan]

From: Fabio Estevam <festevam@gmail.com> Sent: Friday, December 08, 2017 10:12 PM
>The GPIO polarity passed to phy-reset-gpio is ignored by the FEC driver and it
>is assumed to be active low.
>
>It can be active high only when the 'phy-reset-active-high' property is present.
>
>The current examples pass active high polarity and work fine, but in order to
>improve the documentation make it explicit what the real polarity is.
>
>Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>

Since driver don't take care the flag, it doesn't matter what the value for the gpio polarity flag.
But the change look like explicit for user. 

Acked-by: Fugang Duan <fugang.duan@nxp.com>

>---
> Documentation/devicetree/bindings/net/fsl-fec.txt | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
>diff --git a/Documentation/devicetree/bindings/net/fsl-fec.txt
>b/Documentation/devicetree/bindings/net/fsl-fec.txt
>index f0dc944..2d41fb9 100644
>--- a/Documentation/devicetree/bindings/net/fsl-fec.txt
>+++ b/Documentation/devicetree/bindings/net/fsl-fec.txt
>@@ -59,7 +59,7 @@ ethernet@83fec000 {
> 	reg = <0x83fec000 0x4000>;
> 	interrupts = <87>;
> 	phy-mode = "mii";
>-	phy-reset-gpios = <&gpio2 14 0>; /* GPIO2_14 */
>+	phy-reset-gpios = <&gpio2 14 GPIO_ACTIVE_LOW>; /* GPIO2_14 */
> 	local-mac-address = [00 04 9F 01 1B B9];
> 	phy-supply = <&reg_fec_supply>;
> };
>@@ -71,7 +71,7 @@ ethernet@83fec000 {
> 	reg = <0x83fec000 0x4000>;
> 	interrupts = <87>;
> 	phy-mode = "mii";
>-	phy-reset-gpios = <&gpio2 14 0>; /* GPIO2_14 */
>+	phy-reset-gpios = <&gpio2 14 GPIO_ACTIVE_LOW>; /* GPIO2_14 */
> 	local-mac-address = [00 04 9F 01 1B B9];
> 	phy-supply = <&reg_fec_supply>;
> 	phy-handle = <&ethphy>;
>--
>2.7.4

Re: [PATCH] dt-bindings: fec: Make the phy-reset-gpio polarity explicit

[David Miller]

From: Fabio Estevam <festevam@gmail.com>
Date: Fri,  8 Dec 2017 12:11:33 -0200

> From: Fabio Estevam <fabio.estevam@nxp.com>
> 
> The GPIO polarity passed to phy-reset-gpio is ignored by the FEC
> driver and it is assumed to be active low.
> 
> It can be active high only when the 'phy-reset-active-high' property
> is present.
> 
> The current examples pass active high polarity and work fine, but
> in order to improve the documentation make it explicit what the real
> polarity is.
> 
> Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>

Applied to net-next.