2022-11-16 20:10:00

by Anand Moon

Subject: [linux-next-v2 4/5] arm64: dts: rockchip: Add support of interrupt to ethernet node on Rock 3A SBC

As per the shematic gmac1 support gpio interrupt controller
GMAC1_INT/PMEB_GPIO3_A7 add the support for this.

Signed-off-by: Anand Moon <[email protected]>
---
v2: new patch added
---
arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts b/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
index 5378254c57ca..9f84a23a8789 100644
--- a/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
@@ -588,10 +588,14 @@ rgmii_phy1: ethernet-phy@0 {
compatible = "ethernet-phy-ieee802.3-c22";
reg = <0x0>;
pinctrl-names = "default";
- pinctrl-0 = <&eth_phy_rst>;
+ pinctrl-0 = <&eth_phy_rst>, <&eth_phy_int>;
reset-assert-us = <20000>;
reset-deassert-us = <100000>;
reset-gpios = <&gpio3 RK_PB0 GPIO_ACTIVE_LOW>;
+ interrupt-parent = <&gpio3>;
+ /* GMAC1_INT/PMEB_GPIO3_A7 */
+ interrupts = <RK_PA7 IRQ_TYPE_LEVEL_LOW>;
+ #interrupt-cells = <1>;
};
};

@@ -630,6 +634,10 @@ vcc_mipi_en: vcc_mipi_en {
};

ethernet {
+ eth_phy_int: eth-phy-int {
+ rockchip,pins = <3 RK_PA7 RK_FUNC_GPIO &pcfg_pull_down>;
+ };
+
eth_phy_rst: eth_phy_rst {
rockchip,pins = <3 RK_PB0 RK_FUNC_GPIO &pcfg_pull_none>;
};
--
2.38.1

2022-11-22 16:27:26

by Michael Riesch

Subject: Re: [linux-next-v2 4/5] arm64: dts: rockchip: Add support of interrupt to ethernet node on Rock 3A SBC

Hi Anand,

On 11/16/22 21:01, Anand Moon wrote:
> As per the shematic gmac1 support gpio interrupt controller

Typo "shematic" -> "schematic"

> GMAC1_INT/PMEB_GPIO3_A7 add the support for this.

Maybe split the commit message into two proper sentences.
>
> Signed-off-by: Anand Moon <[email protected]>
> ---
> v2: new patch added
> ---
> arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts | 10 +++++++++-
> 1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts b/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
> index 5378254c57ca..9f84a23a8789 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
> @@ -588,10 +588,14 @@ rgmii_phy1: ethernet-phy@0 {
> compatible = "ethernet-phy-ieee802.3-c22";
> reg = <0x0>;
> pinctrl-names = "default";
> - pinctrl-0 = <&eth_phy_rst>;
> + pinctrl-0 = <&eth_phy_rst>, <&eth_phy_int>;
> reset-assert-us = <20000>;
> reset-deassert-us = <100000>;
> reset-gpios = <&gpio3 RK_PB0 GPIO_ACTIVE_LOW>;
> + interrupt-parent = <&gpio3>;
> + /* GMAC1_INT/PMEB_GPIO3_A7 */

This comment is pretty superfluous.

> + interrupts = <RK_PA7 IRQ_TYPE_LEVEL_LOW>;
> + #interrupt-cells = <1>;

I am not an expert here, but I believe #interrupt-cells = <1>; means
that the phy provides an array of interrupts. Are you sure this is
correct? I find it strange that the phy driver consumes one interrupt
and provides N interrupts?!

> };
> };
>
> @@ -630,6 +634,10 @@ vcc_mipi_en: vcc_mipi_en {
> };
>
> ethernet {
> + eth_phy_int: eth-phy-int {
> + rockchip,pins = <3 RK_PA7 RK_FUNC_GPIO &pcfg_pull_down>;

Interrupt is active low and you pull down the line here? There is a pull
up resistor on sheet 11 of the schematic, so this does not seem right at
all.

Best regards,
Michael

> + };
> +
> eth_phy_rst: eth_phy_rst {
> rockchip,pins = <3 RK_PB0 RK_FUNC_GPIO &pcfg_pull_none>;
> };

2022-11-23 14:22:08

by Anand Moon

Subject: Re: [linux-next-v2 4/5] arm64: dts: rockchip: Add support of interrupt to ethernet node on Rock 3A SBC

Hi Michael,

Thanks for your review comments.

On Tue, 22 Nov 2022 at 21:40, Michael Riesch
<[email protected]> wrote:
>
> Hi Anand,
>
> On 11/16/22 21:01, Anand Moon wrote:
> > As per the shematic gmac1 support gpio interrupt controller
>
> Typo "shematic" -> "schematic"
Ok,
>
> > GMAC1_INT/PMEB_GPIO3_A7 add the support for this.
>
> Maybe split the commit message into two proper sentences.

Ok this Interrupt is used for Power Management Event (supports 3.3V pull up).
Set low if received a magic packet or wake up frame; active low.
so this interrupt is used for suspend / resume.

> >
> > Signed-off-by: Anand Moon <[email protected]>
> > ---
> > v2: new patch added
> > ---
> > arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts | 10 +++++++++-
> > 1 file changed, 9 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts b/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
> > index 5378254c57ca..9f84a23a8789 100644
> > --- a/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
> > +++ b/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
> > @@ -588,10 +588,14 @@ rgmii_phy1: ethernet-phy@0 {
> > compatible = "ethernet-phy-ieee802.3-c22";
> > reg = <0x0>;
> > pinctrl-names = "default";
> > - pinctrl-0 = <&eth_phy_rst>;
> > + pinctrl-0 = <&eth_phy_rst>, <&eth_phy_int>;
> > reset-assert-us = <20000>;
> > reset-deassert-us = <100000>;
> > reset-gpios = <&gpio3 RK_PB0 GPIO_ACTIVE_LOW>;
> > + interrupt-parent = <&gpio3>;
> > + /* GMAC1_INT/PMEB_GPIO3_A7 */
>
> This comment is pretty superfluous.

Ok will drop this.

>
> > + interrupts = <RK_PA7 IRQ_TYPE_LEVEL_LOW>;
> > + #interrupt-cells = <1>;
>
> I am not an expert here, but I believe #interrupt-cells = <1>; means
> that the phy provides an array of interrupts. Are you sure this is
> correct? I find it strange that the phy driver consumes one interrupt
> and provides N interrupts?!
>
Ok will drop this.

> > };
> > };
> >
> > @@ -630,6 +634,10 @@ vcc_mipi_en: vcc_mipi_en {
> > };
> >
> > ethernet {
> > + eth_phy_int: eth-phy-int {
> > + rockchip,pins = <3 RK_PA7 RK_FUNC_GPIO &pcfg_pull_down>;
>
> Interrupt is active low and you pull down the line here? There is a pull
> up resistor on sheet 11 of the schematic, so this does not seem right at
> all.
>
Actually this GPIO3_A7_d hence pull_down, this pin level triggered
So I will set this as &pcfg_pull_none.

I don't have PoE set up to verify these changes as of now.

> Best regards,
> Michael

Thanks

-Anand