linux-kernel - Re: [PATCH] arm64: dts: clearfog-gt-8k: fix ge phy reset pin

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Date:   Sun, 29 Mar 2020 09:22:03 +0300
From:   Baruch Siach <baruch@...s.co.il>
To:     Stefan Eichenberger <eichest@...il.com>
Cc:     Jason Cooper <jason@...edaemon.net>, Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        Stefan Eichenberger <eichest@...il.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Russell King <linux@...linux.org.uk>,
        Rabeeh Khoury <rabeeh@...id-run.com>
Subject: Re: [PATCH] arm64: dts: clearfog-gt-8k: fix ge phy reset pin

Hi Stefan,

On Sun, Mar 29 2020, eichest@...il.com wrote:
> From: Stefan Eichenberger <eichest@...il.com>
>
> According to the ClearFog-GT-8K-rev-1_1-Simplified-Schematic the reset
> pin for the gigabit phy is MPP62 and not MPP43.

Have you tested that on real hardware?

The 1Gb PHY reset on my Clearfog GT-8K is connected to MPP43. Russell's
commit 46f94c7818e7 ("arm64: dts: clearfog-gt-8k: set gigabit PHY reset
deassert delay") indicates that this is the case on his board as well.

In case there was a hardware change between board revisions, we need
another dtb for that revision.

baruch

> Signed-off-by: Stefan Eichenberger <eichest@...il.com>
> ---
>  .../dts/marvell/armada-8040-clearfog-gt-8k.dts     | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts b/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
> index b90d78a5724b..d371d938b41e 100644
> --- a/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
> +++ b/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
> @@ -144,7 +144,6 @@
>  	 * [35-38] CP0 I2C1 and I2C0
>  	 * [39] GPIO reset button
>  	 * [40,41] LED0 and LED1
> -	 * [43] 1512 phy reset
>  	 * [47] USB VBUS EN (active low)
>  	 * [48] FAN PWM
>  	 * [49] SFP+ present signal
> @@ -155,6 +154,7 @@
>  	 * [54] NFC reset
>  	 * [55] Micro SD card detect
>  	 * [56-61] Micro SD
> +	 * [62] 1512 phy reset
>  	 */
>
>  	cp0_pci0_reset_pins: pci0-reset-pins {
> @@ -197,11 +197,6 @@
>  		marvell,function = "gpio";
>  	};
>
> -	cp0_copper_eth_phy_reset: copper-eth-phy-reset {
> -		marvell,pins = "mpp43";
> -		marvell,function = "gpio";
> -	};
> -
>  	cp0_xhci_vbus_pins: xhci0-vbus-pins {
>  		marvell,pins = "mpp47";
>  		marvell,function = "gpio";
> @@ -232,6 +227,11 @@
>  			       "mpp60", "mpp61";
>  		marvell,function = "sdio";
>  	};
> +
> +	cp0_copper_eth_phy_reset: copper-eth-phy-reset {
> +		marvell,pins = "mpp62";
> +		marvell,function = "gpio";
> +	};
>  };
>
>  &cp0_pcie0 {
> @@ -365,7 +365,7 @@
>  		reg = <0>;
>  		pinctrl-names = "default";
>  		pinctrl-0 = <&cp0_copper_eth_phy_reset>;
> -		reset-gpios = <&cp0_gpio2 11 GPIO_ACTIVE_LOW>;
> +		reset-gpios = <&cp0_gpio2 30 GPIO_ACTIVE_LOW>;
>  		reset-assert-us = <10000>;
>  		reset-deassert-us = <10000>;
>  	};


--
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