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Message-ID: <80d5d287a6c6f84bc9898ceeec794dc05cbb44bc.camel@mediatek.com>
Date: Mon, 13 Dec 2021 09:34:16 +0800
From: Biao Huang <biao.huang@...iatek.com>
To: Rob Herring <robh@...nel.org>
CC: <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Giuseppe Cavallaro <peppe.cavallaro@...com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Jose Abreu <joabreu@...opsys.com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
<netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>,
<linux-stm32@...md-mailman.stormreply.com>,
<srv_heupstream@...iatek.com>, <macpaul.lin@...iatek.com>,
<angelogioacchino.delregno@...labora.com>, <dkirjanov@...e.de>
Subject: Re: [PATCH net-next v8 4/6] net: dt-bindings: dwmac: Convert
mediatek-dwmac to DT schema
Dear Rob,
Thanks for your comments~
On Fri, 2021-12-10 at 12:49 -0600, Rob Herring wrote:
> On Fri, Dec 10, 2021 at 09:31:27AM +0800, Biao Huang wrote:
> > Convert mediatek-dwmac to DT schema, and delete old mediatek-
> > dwmac.txt.
> > And there are some changes in .yaml than .txt, others almost keep
> > the same:
> > 1. compatible "const: snps,dwmac-4.20".
> > 2. delete "snps,reset-active-low;" in example, since driver
> > remove this
> > property long ago.
> > 3. add "snps,reset-delay-us = <0 10000 10000>" in example.
> > 4. the example is for rgmii interface, keep related properties
> > only.
> >
> > Signed-off-by: Biao Huang <biao.huang@...iatek.com>
> > ---
> > .../bindings/net/mediatek-dwmac.txt | 91 ----------
> > .../bindings/net/mediatek-dwmac.yaml | 156
> > ++++++++++++++++++
> > 2 files changed, 156 insertions(+), 91 deletions(-)
> > delete mode 100644 Documentation/devicetree/bindings/net/mediatek-
> > dwmac.txt
> > create mode 100644 Documentation/devicetree/bindings/net/mediatek-
> > dwmac.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/net/mediatek-
> > dwmac.txt b/Documentation/devicetree/bindings/net/mediatek-
> > dwmac.txt
> > deleted file mode 100644
> > index afbcaebf062e..000000000000
> > --- a/Documentation/devicetree/bindings/net/mediatek-dwmac.txt
> > +++ /dev/null
> > @@ -1,91 +0,0 @@
> > -MediaTek DWMAC glue layer controller
> > -
> > -This file documents platform glue layer for stmmac.
> > -Please see stmmac.txt for the other unchanged properties.
> > -
> > -The device node has following properties.
> > -
> > -Required properties:
> > -- compatible: Should be "mediatek,mt2712-gmac" for MT2712 SoC
> > -- reg: Address and length of the register set for the device
> > -- interrupts: Should contain the MAC interrupts
> > -- interrupt-names: Should contain a list of interrupt names
> > corresponding to
> > - the interrupts in the interrupts property, if available.
> > - Should be "macirq" for the main MAC IRQ
> > -- clocks: Must contain a phandle for each entry in clock-names.
> > -- clock-names: The name of the clock listed in the clocks
> > property. These are
> > - "axi", "apb", "mac_main", "ptp_ref", "rmii_internal" for MT2712
> > SoC.
> > -- mac-address: See ethernet.txt in the same directory
> > -- phy-mode: See ethernet.txt in the same directory
> > -- mediatek,pericfg: A phandle to the syscon node that control
> > ethernet
> > - interface and timing delay.
> > -
> > -Optional properties:
> > -- mediatek,tx-delay-ps: TX clock delay macro value. Default is 0.
> > - It should be defined for RGMII/MII interface.
> > - It should be defined for RMII interface when the reference
> > clock is from MT2712 SoC.
> > -- mediatek,rx-delay-ps: RX clock delay macro value. Default is 0.
> > - It should be defined for RGMII/MII interface.
> > - It should be defined for RMII interface.
> > -Both delay properties need to be a multiple of 170 for RGMII
> > interface,
> > -or will round down. Range 0~31*170.
> > -Both delay properties need to be a multiple of 550 for MII/RMII
> > interface,
> > -or will round down. Range 0~31*550.
> > -
> > -- mediatek,rmii-rxc: boolean property, if present indicates that
> > the RMII
> > - reference clock, which is from external PHYs, is connected to
> > RXC pin
> > - on MT2712 SoC.
> > - Otherwise, is connected to TXC pin.
> > -- mediatek,rmii-clk-from-mac: boolean property, if present
> > indicates that
> > - MT2712 SoC provides the RMII reference clock, which outputs to
> > TXC pin only.
> > -- mediatek,txc-inverse: boolean property, if present indicates
> > that
> > - 1. tx clock will be inversed in MII/RGMII case,
> > - 2. tx clock inside MAC will be inversed relative to reference
> > clock
> > - which is from external PHYs in RMII case, and it rarely
> > happen.
> > - 3. the reference clock, which outputs to TXC pin will be
> > inversed in RMII case
> > - when the reference clock is from MT2712 SoC.
> > -- mediatek,rxc-inverse: boolean property, if present indicates
> > that
> > - 1. rx clock will be inversed in MII/RGMII case.
> > - 2. reference clock will be inversed when arrived at MAC in RMII
> > case, when
> > - the reference clock is from external PHYs.
> > - 3. the inside clock, which be sent to MAC, will be inversed in
> > RMII case when
> > - the reference clock is from MT2712 SoC.
> > -- assigned-clocks: mac_main and ptp_ref clocks
> > -- assigned-clock-parents: parent clocks of the assigned clocks
> > -
> > -Example:
> > - eth: ethernet@...1c000 {
> > - compatible = "mediatek,mt2712-gmac";
> > - reg = <0 0x1101c000 0 0x1300>;
> > - interrupts = <GIC_SPI 237 IRQ_TYPE_LEVEL_LOW>;
> > - interrupt-names = "macirq";
> > - phy-mode ="rgmii-rxid";
> > - mac-address = [00 55 7b b5 7d f7];
> > - clock-names = "axi",
> > - "apb",
> > - "mac_main",
> > - "ptp_ref",
> > - "rmii_internal";
> > - clocks = <&pericfg CLK_PERI_GMAC>,
> > - <&pericfg CLK_PERI_GMAC_PCLK>,
> > - <&topckgen CLK_TOP_ETHER_125M_SEL>,
> > - <&topckgen CLK_TOP_ETHER_50M_SEL>,
> > - <&topckgen CLK_TOP_ETHER_50M_RMII_SEL>;
> > - assigned-clocks = <&topckgen CLK_TOP_ETHER_125M_SEL>,
> > - <&topckgen CLK_TOP_ETHER_50M_SEL>,
> > - <&topckgen
> > CLK_TOP_ETHER_50M_RMII_SEL>;
> > - assigned-clock-parents = <&topckgen
> > CLK_TOP_ETHERPLL_125M>,
> > - <&topckgen CLK_TOP_APLL1_D3>,
> > - <&topckgen
> > CLK_TOP_ETHERPLL_50M>;
> > - power-domains = <&scpsys MT2712_POWER_DOMAIN_AUDIO>;
> > - mediatek,pericfg = <&pericfg>;
> > - mediatek,tx-delay-ps = <1530>;
> > - mediatek,rx-delay-ps = <1530>;
> > - mediatek,rmii-rxc;
> > - mediatek,txc-inverse;
> > - mediatek,rxc-inverse;
> > - snps,txpbl = <1>;
> > - snps,rxpbl = <1>;
> > - snps,reset-gpio = <&pio 87 GPIO_ACTIVE_LOW>;
> > - snps,reset-active-low;
> > - };
> > diff --git a/Documentation/devicetree/bindings/net/mediatek-
> > dwmac.yaml b/Documentation/devicetree/bindings/net/mediatek-
> > dwmac.yaml
> > new file mode 100644
> > index 000000000000..9207266a6e69
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/net/mediatek-dwmac.yaml
> > @@ -0,0 +1,156 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/net/mediatek-dwmac.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: MediaTek DWMAC glue layer controller
> > +
> > +maintainers:
> > + - Biao Huang <biao.huang@...iatek.com>
> > +
> > +description:
> > + This file documents platform glue layer for stmmac.
> > +
> > +# We need a select here so we don't match all nodes with
> > 'snps,dwmac'
> > +select:
> > + properties:
> > + compatible:
> > + contains:
> > + enum:
> > + - mediatek,mt2712-gmac
> > + required:
> > + - compatible
> > +
> > +allOf:
> > + - $ref: "snps,dwmac.yaml#"
> > +
> > +properties:
> > + compatible:
> > + oneOf:
> > + - items:
>
> Don't need oneOf for 1 entry.
OK, I'll fix it in next send.
>
> > + - enum:
> > + - mediatek,mt2712-gmac
> > + - const: snps,dwmac-4.20a
> > +
> > + clocks:
> > + items:
> > + - description: AXI clock
> > + - description: APB clock
> > + - description: MAC Main clock
> > + - description: PTP clock
> > + - description: RMII reference clock provided by MAC
>
> Seems you need 'minItems: 4' or are the DT files wrong?
The current eth device node in mt2712.dtsi should be updated,
and there is a patch in this series for it:
"[PATCH net-next v8 3/6] arm64: dts: mt2712: update ethernet device
node"
>
> > +
> > + clock-names:
> > + items:
> > + - const: axi
> > + - const: apb
> > + - const: mac_main
> > + - const: ptp_ref
> > + - const: rmii_internal
> > +
> > + mediatek,pericfg:
> > + $ref: /schemas/types.yaml#/definitions/phandle
> > + description:
> > + The phandle to the syscon node that control ethernet
> > + interface and timing delay.
> > +
> > + mediatek,tx-delay-ps:
> > + description:
> > + The internal TX clock delay (provided by this driver) in
> > nanoseconds.
> > + For MT2712 RGMII interface, Allowed value need to be a
> > multiple of 170,
> > + or will round down. Range 0~31*170.
> > + For MT2712 RMII/MII interface, Allowed value need to be a
> > multiple of 550,
> > + or will round down. Range 0~31*550.
> > +
> > + mediatek,rx-delay-ps:
> > + description:
> > + The internal RX clock delay (provided by this driver) in
> > nanoseconds.
> > + For MT2712 RGMII interface, Allowed value need to be a
> > multiple of 170,
> > + or will round down. Range 0~31*170.
> > + For MT2712 RMII/MII interface, Allowed value need to be a
> > multiple of 550,
> > + or will round down. Range 0~31*550.
> > +
> > + mediatek,rmii-rxc:
> > + type: boolean
> > + description:
> > + If present, indicates that the RMII reference clock, which
> > is from external
> > + PHYs, is connected to RXC pin. Otherwise, is connected to
> > TXC pin.
> > +
> > + mediatek,rmii-clk-from-mac:
> > + type: boolean
> > + description:
> > + If present, indicates that MAC provides the RMII reference
> > clock, which
> > + outputs to TXC pin only.
> > +
> > + mediatek,txc-inverse:
> > + type: boolean
> > + description:
> > + If present, indicates that
> > + 1. tx clock will be inversed in MII/RGMII case,
> > + 2. tx clock inside MAC will be inversed relative to
> > reference clock
> > + which is from external PHYs in RMII case, and it rarely
> > happen.
> > + 3. the reference clock, which outputs to TXC pin will be
> > inversed in RMII case
> > + when the reference clock is from MAC.
> > +
> > + mediatek,rxc-inverse:
> > + type: boolean
> > + description:
> > + If present, indicates that
> > + 1. rx clock will be inversed in MII/RGMII case.
> > + 2. reference clock will be inversed when arrived at MAC in
> > RMII case, when
> > + the reference clock is from external PHYs.
> > + 3. the inside clock, which be sent to MAC, will be inversed
> > in RMII case when
> > + the reference clock is from MAC.
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - interrupts
> > + - interrupt-names
> > + - clocks
> > + - clock-names
> > + - phy-mode
> > + - mediatek,pericfg
> > +
> > +unevaluatedProperties: false
> > +
> > +examples:
> > + - |
> > + #include <dt-bindings/clock/mt2712-clk.h>
> > + #include <dt-bindings/gpio/gpio.h>
> > + #include <dt-bindings/interrupt-controller/arm-gic.h>
> > + #include <dt-bindings/interrupt-controller/irq.h>
> > + #include <dt-bindings/power/mt2712-power.h>
> > +
> > + eth: ethernet@...1c000 {
> > + compatible = "mediatek,mt2712-gmac", "snps,dwmac-4.20a";
> > + reg = <0x1101c000 0x1300>;
> > + interrupts = <GIC_SPI 237 IRQ_TYPE_LEVEL_LOW>;
> > + interrupt-names = "macirq";
> > + phy-mode ="rgmii-rxid";
> > + mac-address = [00 55 7b b5 7d f7];
> > + clock-names = "axi",
> > + "apb",
> > + "mac_main",
> > + "ptp_ref",
> > + "rmii_internal";
> > + clocks = <&pericfg CLK_PERI_GMAC>,
> > + <&pericfg CLK_PERI_GMAC_PCLK>,
> > + <&topckgen CLK_TOP_ETHER_125M_SEL>,
> > + <&topckgen CLK_TOP_ETHER_50M_SEL>,
> > + <&topckgen CLK_TOP_ETHER_50M_RMII_SEL>;
> > + assigned-clocks = <&topckgen CLK_TOP_ETHER_125M_SEL>,
> > + <&topckgen CLK_TOP_ETHER_50M_SEL>,
> > + <&topckgen CLK_TOP_ETHER_50M_RMII_SEL>;
> > + assigned-clock-parents = <&topckgen
> > CLK_TOP_ETHERPLL_125M>,
> > + <&topckgen CLK_TOP_APLL1_D3>,
> > + <&topckgen CLK_TOP_ETHERPLL_50M>;
> > + power-domains = <&scpsys MT2712_POWER_DOMAIN_AUDIO>;
> > + mediatek,pericfg = <&pericfg>;
> > + mediatek,tx-delay-ps = <1530>;
> > + snps,txpbl = <1>;
> > + snps,rxpbl = <1>;
> > + snps,reset-gpio = <&pio 87 GPIO_ACTIVE_LOW>;
> > + snps,reset-delays-us = <0 10000 10000>;
> > + };
> > --
> > 2.25.1
> >
> >
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