linux-kernel - Re: [PATCH v2 09/12] riscv: dts: starfive: jh7100: Add sysmain and gmac DT nodes

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Date:   Sun, 26 Nov 2023 22:15:02 +0100
From:   Emil Renner Berthing <emil.renner.berthing@...onical.com>
To:     Cristian Ciocaltea <cristian.ciocaltea@...labora.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Emil Renner Berthing <kernel@...il.dk>,
        Samin Guo <samin.guo@...rfivetech.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Richard Cochran <richardcochran@...il.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, kernel@...labora.com
Subject: Re: [PATCH v2 09/12] riscv: dts: starfive: jh7100: Add sysmain and
 gmac DT nodes

Cristian Ciocaltea wrote:
> Provide the sysmain and gmac DT nodes supporting the DWMAC found on the
> StarFive JH7100 SoC.
>
> Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
> ---
>  arch/riscv/boot/dts/starfive/jh7100.dtsi | 36 ++++++++++++++++++++++++
>  1 file changed, 36 insertions(+)
>
> diff --git a/arch/riscv/boot/dts/starfive/jh7100.dtsi b/arch/riscv/boot/dts/starfive/jh7100.dtsi
> index a8a5bb00b0d8..e8228e96d350 100644
> --- a/arch/riscv/boot/dts/starfive/jh7100.dtsi
> +++ b/arch/riscv/boot/dts/starfive/jh7100.dtsi
> @@ -179,6 +179,37 @@ plic: interrupt-controller@...0000 {
>  			riscv,ndev = <133>;
>  		};
>
> +		gmac: ethernet@...20000 {
> +			compatible = "starfive,jh7100-dwmac", "snps,dwmac";
> +			reg = <0x0 0x10020000 0x0 0x10000>;
> +			clocks = <&clkgen JH7100_CLK_GMAC_ROOT_DIV>,
> +				 <&clkgen JH7100_CLK_GMAC_AHB>,
> +				 <&clkgen JH7100_CLK_GMAC_PTP_REF>,
> +				 <&clkgen JH7100_CLK_GMAC_TX_INV>,
> +				 <&clkgen JH7100_CLK_GMAC_GTX>;
> +			clock-names = "stmmaceth", "pclk", "ptp_ref", "tx", "gtx";
> +			resets = <&rstgen JH7100_RSTN_GMAC_AHB>;
> +			reset-names = "ahb";
> +			interrupts = <6>, <7>;
> +			interrupt-names = "macirq", "eth_wake_irq";
> +			max-frame-size = <9000>;
> +			snps,multicast-filter-bins = <32>;
> +			snps,perfect-filter-entries = <128>;
> +			starfive,syscon = <&sysmain 0x70 0>;
> +			rx-fifo-depth = <32768>;
> +			tx-fifo-depth = <16384>;
> +			snps,axi-config = <&stmmac_axi_setup>;
> +			snps,fixed-burst;
> +			snps,force_thresh_dma_mode;
> +			status = "disabled";
> +
> +			stmmac_axi_setup: stmmac-axi-config {
> +				snps,wr_osr_lmt = <0xf>;
> +				snps,rd_osr_lmt = <0xf>;

As I also noted on the JH7110 patches these are not addresses or offsets but
limits eg. counting things, which makes a lot more sense in decimal for most
humans. But here you've changed them back to 0xf, why?

> +				snps,blen = <256 128 64 32 0 0 0>;
> +			};
> +		};
> +
>  		clkgen: clock-controller@...00000 {
>  			compatible = "starfive,jh7100-clkgen";
>  			reg = <0x0 0x11800000 0x0 0x10000>;
> @@ -193,6 +224,11 @@ rstgen: reset-controller@...40000 {
>  			#reset-cells = <1>;
>  		};
>
> +		sysmain: syscon@...50000 {
> +			compatible = "starfive,jh7100-sysmain", "syscon";
> +			reg = <0x0 0x11850000 0x0 0x10000>;
> +		};
> +
>  		i2c0: i2c@...b0000 {
>  			compatible = "snps,designware-i2c";
>  			reg = <0x0 0x118b0000 0x0 0x10000>;
> --
> 2.42.0
>