[PATCH 1/2] arm64: dts: imx8mm-evk: add phy-reset-gpios for fec1

[PATCH 1/2] arm64: dts: imx8mm-evk: add phy-reset-gpios for fec1

[Peng Fan]

From: Peng Fan <peng.fan@nxp.com>

We should not rely on U-Boot to configure the phy reset.
So introduce phy-reset-gpios property to let Linux handle phy reset
itself.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8mm-evk.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
index faefb7182af1..e4d66f7db09d 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
@@ -80,6 +80,7 @@
 	pinctrl-0 = <&pinctrl_fec1>;
 	phy-mode = "rgmii-id";
 	phy-handle = <&ethphy0>;
+	phy-reset-gpios = <&gpio4 22 GPIO_ACTIVE_LOW>;
 	fsl,magic-packet;
 	status = "okay";
 
-- 
2.16.4

[PATCH 2/2] arm64: dts: imx8mn-ddr4-evk: add phy-reset-gpios for fec1

[Peng Fan]

From: Peng Fan <peng.fan@nxp.com>

We should not rely on U-Boot to configure the phy reset.
So introduce phy-reset-gpios property to let Linux handle phy reset
itself.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts b/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
index 1b90faace1d3..761ba0b5d271 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
@@ -48,6 +48,7 @@
 	pinctrl-0 = <&pinctrl_fec1>;
 	phy-mode = "rgmii-id";
 	phy-handle = <&ethphy0>;
+	phy-reset-gpios = <&gpio4 22 GPIO_ACTIVE_LOW>;
 	fsl,magic-packet;
 	status = "okay";
 
-- 
2.16.4

Re: [PATCH 1/2] arm64: dts: imx8mm-evk: add phy-reset-gpios for fec1

[Marco Felsch]

Hi,

On 19-10-21 09:21, Peng Fan wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> We should not rely on U-Boot to configure the phy reset.
> So introduce phy-reset-gpios property to let Linux handle phy reset
> itself.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  arch/arm64/boot/dts/freescale/imx8mm-evk.dts | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> index faefb7182af1..e4d66f7db09d 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> @@ -80,6 +80,7 @@
>  	pinctrl-0 = <&pinctrl_fec1>;
>  	phy-mode = "rgmii-id";
>  	phy-handle = <&ethphy0>;
> +	phy-reset-gpios = <&gpio4 22 GPIO_ACTIVE_LOW>;

Where is the pinctrl done?

Regards,
  Marco

>  	fsl,magic-packet;
>  	status = "okay";
>  
> -- 
> 2.16.4
> 
> 
> 

-- 
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RE: [PATCH 1/2] arm64: dts: imx8mm-evk: add phy-reset-gpios for fec1

[Peng Fan]

> Subject: Re: [PATCH 1/2] arm64: dts: imx8mm-evk: add phy-reset-gpios for
> fec1
> 
> Hi,
> 
> On 19-10-21 09:21, Peng Fan wrote:
> > From: Peng Fan <peng.fan@nxp.com>
> >
> > We should not rely on U-Boot to configure the phy reset.
> > So introduce phy-reset-gpios property to let Linux handle phy reset
> > itself.
> >
> > Signed-off-by: Peng Fan <peng.fan@nxp.com>
> > ---
> >  arch/arm64/boot/dts/freescale/imx8mm-evk.dts | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> > b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> > index faefb7182af1..e4d66f7db09d 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> > +++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> > @@ -80,6 +80,7 @@
> >  	pinctrl-0 = <&pinctrl_fec1>;
> >  	phy-mode = "rgmii-id";
> >  	phy-handle = <&ethphy0>;
> > +	phy-reset-gpios = <&gpio4 22 GPIO_ACTIVE_LOW>;
> 
> Where is the pinctrl done?

https://elixir.bootlin.com/linux/v5.4-rc2/source/arch/arm64/boot/dts/freescale/imx8mm-evk.dts#L328

Regards,
Peng.

> 
> Regards,
>   Marco
> 
> >  	fsl,magic-packet;
> >  	status = "okay";
> >
> > --
> > 2.16.4
> >
> >
> >
> 
> --
> Pengutronix e.K.                           |
> |
> Industrial Linux Solutions                 |
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> |
> Amtsgericht Hildesheim, HRA 2686           | Fax:
> +49-5121-206917-5555 |

Re: [PATCH 1/2] arm64: dts: imx8mm-evk: add phy-reset-gpios for fec1

[Marco Felsch]

On 19-10-21 09:46, Peng Fan wrote:
> > Subject: Re: [PATCH 1/2] arm64: dts: imx8mm-evk: add phy-reset-gpios for
> > fec1
> > 
> > Hi,
> > 
> > On 19-10-21 09:21, Peng Fan wrote:
> > > From: Peng Fan <peng.fan@nxp.com>
> > >
> > > We should not rely on U-Boot to configure the phy reset.

nitpick: s/U-Boot/bootloader/ ?

> > > So introduce phy-reset-gpios property to let Linux handle phy reset
> > > itself.
> > >
> > > Signed-off-by: Peng Fan <peng.fan@nxp.com>
> > > ---
> > >  arch/arm64/boot/dts/freescale/imx8mm-evk.dts | 1 +
> > >  1 file changed, 1 insertion(+)
> > >
> > > diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> > > b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> > > index faefb7182af1..e4d66f7db09d 100644
> > > --- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> > > +++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> > > @@ -80,6 +80,7 @@
> > >  	pinctrl-0 = <&pinctrl_fec1>;
> > >  	phy-mode = "rgmii-id";
> > >  	phy-handle = <&ethphy0>;
> > > +	phy-reset-gpios = <&gpio4 22 GPIO_ACTIVE_LOW>;
> > 
> > Where is the pinctrl done?
> 
> https://elixir.bootlin.com/linux/v5.4-rc2/source/arch/arm64/boot/dts/freescale/imx8mm-evk.dts#L328

Thanks :)

Reviewed-by: Marco Felsch <m.felsch@pengutronix.de> 

Regards,
  Marco 

> Regards,
> Peng.
> 
> > 
> > Regards,
> >   Marco
> > 
> > >  	fsl,magic-packet;
> > >  	status = "okay";
> > >
> > > --
> > > 2.16.4
> > >
> > >
> > >
> > 
> > --
> > Pengutronix e.K.                           |
> > |
> > Industrial Linux Solutions                 |
> > https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.p
> > engutronix.de%2F&amp;data=02%7C01%7Cpeng.fan%40nxp.com%7Cb40bb6
> > 4c5e39449ade4808d7560b43ca%7C686ea1d3bc2b4c6fa92cd99c5c301635%
> > 7C0%7C0%7C637072478688921047&amp;sdata=xZI60uyyQ%2BkX%2Fpf07n
> > CgVhGt1ApYBKSnndGB3Dk2578%3D&amp;reserved=0  |
> > Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0
> > |
> > Amtsgericht Hildesheim, HRA 2686           | Fax:
> > +49-5121-206917-5555 |
> 

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

Re: [PATCH 1/2] arm64: dts: imx8mm-evk: add phy-reset-gpios for fec1

[Shawn Guo]

On Fri, Feb 14, 2020 at 04:27:49PM -0300, Alifer Moraes wrote:
> imx8mm-evk has a GPIO connected to AR8031 Ethernet PHY's reset pin.
> 
> Describe it in the device tree, following phy's datasheet reset duration of 10ms.
> 
> Tested booting via NFS.
> 
> Signed-off-by: Alifer Moraes <alifer.wsdm@gmail.com>

Applied both, thanks.

Re: [PATCH 1/2] arm64: dts: imx8mm-evk: add phy-reset-gpios for fec1

[Fabio Estevam]

On Fri, Feb 14, 2020 at 4:27 PM Alifer Moraes <alifer.wsdm@gmail.com> wrote:
>
> imx8mm-evk has a GPIO connected to AR8031 Ethernet PHY's reset pin.
>
> Describe it in the device tree, following phy's datasheet reset duration of 10ms.
>
> Tested booting via NFS.
>
> Signed-off-by: Alifer Moraes <alifer.wsdm@gmail.com>

Reviewed-by: Fabio Estevam <festevam@gmail.com>

Re: [PATCH 1/2] arm64: dts: imx8mm-evk: add phy-reset-gpios for fec1

[Alifer Moraes]

Hello,

I forgot to select reply all in this question, so I answered only to Marco.

> Where is this gpio muxed?
>

The gpio is muxed in the subnode pinctrl_fec1.

Regards,

Alifer

Re: [PATCH 1/2] arm64: dts: imx8mm-evk: add phy-reset-gpios for fec1

[Marco Felsch]

Hi,

On 20-02-14 16:27, Alifer Moraes wrote:
> imx8mm-evk has a GPIO connected to AR8031 Ethernet PHY's reset pin.
> 
> Describe it in the device tree, following phy's datasheet reset duration of 10ms.
> 
> Tested booting via NFS.
> 
> Signed-off-by: Alifer Moraes <alifer.wsdm@gmail.com>
> ---
> 
> Originally sent by Peng Fan <peng.fan@nxp.com>
> 
> Back then CONFIG_AT803X_PHY was set as "m" in defconfig so the boot process hung
> at nfs boot, now that CONFIG_AT803X_PHY is set as "y" by default, the patch works
> correctly.
> 
> Peng's original patch missed to pass the phy-reset-duration, according to the AR8031
> datasheet the reset GPIO needs to stay low for 10ms.
> 
> Original thread: https://lkml.org/lkml/2019/10/21/347
> 
>  arch/arm64/boot/dts/freescale/imx8mm-evk.dts | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> index 28ab17a277bb..11903ca86f0e 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> @@ -82,6 +82,8 @@
>  	pinctrl-0 = <&pinctrl_fec1>;
>  	phy-mode = "rgmii-id";
>  	phy-handle = <&ethphy0>;
> +	phy-reset-gpios = <&gpio4 22 GPIO_ACTIVE_LOW>;

Where is this gpio muxed?

Regards,
  Marco

> +	phy-reset-duration = <10>;
>  	fsl,magic-packet;
>  	status = "okay";
>  
> -- 
> 2.17.1
> 
> 
> 

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[PATCH 1/2] arm64: dts: imx8mm-evk: add phy-reset-gpios for fec1

[Alifer Moraes]

imx8mm-evk has a GPIO connected to AR8031 Ethernet PHY's reset pin.

Describe it in the device tree, following phy's datasheet reset duration of 10ms.

Tested booting via NFS.

Signed-off-by: Alifer Moraes <alifer.wsdm@gmail.com>
---

Originally sent by Peng Fan <peng.fan@nxp.com>

Back then CONFIG_AT803X_PHY was set as "m" in defconfig so the boot process hung
at nfs boot, now that CONFIG_AT803X_PHY is set as "y" by default, the patch works
correctly.

Peng's original patch missed to pass the phy-reset-duration, according to the AR8031
datasheet the reset GPIO needs to stay low for 10ms.

Original thread: https://lkml.org/lkml/2019/10/21/347

 arch/arm64/boot/dts/freescale/imx8mm-evk.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
index 28ab17a277bb..11903ca86f0e 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
@@ -82,6 +82,8 @@
 	pinctrl-0 = <&pinctrl_fec1>;
 	phy-mode = "rgmii-id";
 	phy-handle = <&ethphy0>;
+	phy-reset-gpios = <&gpio4 22 GPIO_ACTIVE_LOW>;
+	phy-reset-duration = <10>;
 	fsl,magic-packet;
 	status = "okay";
 
-- 
2.17.1