linux-kernel - Re: [PATCH v2 3/4] arm64: dts: fsd: Add Ethernet support for FSYS0 Block of FSD SoC

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Date:   Mon, 14 Aug 2023 21:52:27 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Sriranjani P <sriranjani.p@...sung.com>, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        alexandre.torgue@...s.st.com, peppe.cavallaro@...com,
        joabreu@...opsys.com, mcoquelin.stm32@...il.com
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, pankaj.dubey@...sung.com,
        alim.akhtar@...sung.com, ravi.patel@...sung.com,
        'Jayati Sahu' <jayati.sahu@...sung.com>, swathi.ks@...sung.com
Subject: Re: [PATCH v2 3/4] arm64: dts: fsd: Add Ethernet support for FSYS0
 Block of FSD SoC

On 14/08/2023 12:18, Sriranjani P wrote:
> 
> 
>> -----Original Message-----
>> From: Krzysztof Kozlowski [mailto:krzysztof.kozlowski@...aro.org]
>> Sent: 12 January 2023 15:05
>> To: Sriranjani P <sriranjani.p@...sung.com>; davem@...emloft.net;
>> edumazet@...gle.com; kuba@...nel.org; pabeni@...hat.com;
>> robh+dt@...nel.org; krzysztof.kozlowski+dt@...aro.org;
>> alexandre.torgue@...s.st.com; peppe.cavallaro@...com;
>> joabreu@...opsys.com; mcoquelin.stm32@...il.com
>> Cc: netdev@...r.kernel.org; devicetree@...r.kernel.org; linux-
>> kernel@...r.kernel.org; pankaj.dubey@...sung.com;
>> alim.akhtar@...sung.com; ravi.patel@...sung.com; Jayati Sahu
>> <jayati.sahu@...sung.com>
>> Subject: Re: [PATCH v2 3/4] arm64: dts: fsd: Add Ethernet support for FSYS0
>> Block of FSD SoC
>>
>> On 11/01/2023 08:54, Sriranjani P wrote:
>>> The FSD SoC contains two instances of Synopsys DWC QoS Ethernet IP,
>>> one in FSYS0 block and other in PERIC block.
>>>
>>> Adds device tree node for Ethernet in FSYS0 Block and enables the same
>>> for FSD platform.
>>>
>>> Signed-off-by: Pankaj Dubey <pankaj.dubey@...sung.com>
>>> Signed-off-by: Jayati Sahu <jayati.sahu@...sung.com>
>>> Signed-off-by: Sriranjani P <sriranjani.p@...sung.com>
>>> ---
>>>  arch/arm64/boot/dts/tesla/fsd-evb.dts      |  9 ++++
>>>  arch/arm64/boot/dts/tesla/fsd-pinctrl.dtsi | 56
>> ++++++++++++++++++++++
>>>  arch/arm64/boot/dts/tesla/fsd.dtsi         | 22 +++++++++
>>>  3 files changed, 87 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/tesla/fsd-evb.dts
>>> b/arch/arm64/boot/dts/tesla/fsd-evb.dts
>>> index 1db6ddf03f01..ca0c1a28d562 100644
>>> --- a/arch/arm64/boot/dts/tesla/fsd-evb.dts
>>> +++ b/arch/arm64/boot/dts/tesla/fsd-evb.dts
>>> @@ -30,6 +30,15 @@
>>>  	};
>>>  };
>>>
>>> +&ethernet_0 {
>>> +	status = "okay";
>>> +
>>> +	fixed-link {
>>> +		speed = <1000>;
>>> +		full-duplex;
>>> +	};
>>> +};
>>> +
>>>  &fin_pll {
>>>  	clock-frequency = <24000000>;
>>>  };
>>> diff --git a/arch/arm64/boot/dts/tesla/fsd-pinctrl.dtsi
>>> b/arch/arm64/boot/dts/tesla/fsd-pinctrl.dtsi
>>> index d0abb9aa0e9e..7ccc0738a149 100644
>>> --- a/arch/arm64/boot/dts/tesla/fsd-pinctrl.dtsi
>>> +++ b/arch/arm64/boot/dts/tesla/fsd-pinctrl.dtsi
>>> @@ -64,6 +64,62 @@
>>>  		samsung,pin-pud = <FSD_PIN_PULL_NONE>;
>>>  		samsung,pin-drv = <FSD_PIN_DRV_LV2>;
>>>  	};
>>> +
>>> +		eth0_tx_clk: eth0-tx-clk-pins {
>>
>> Wrong indentation.
> Will fix in the next version.
>>
>>> +		samsung,pins = "gpf0-0";
>>> +		samsung,pin-function = <FSD_PIN_FUNC_2>;
>>> +		samsung,pin-pud = <FSD_PIN_PULL_DOWN>;
>>> +		samsung,pin-drv = <FSD_PIN_DRV_LV6>;
>>> +	};
>>> +
>>> +	eth0_tx_data: eth0-tx-data-pins {
>>> +		samsung,pins = "gpf0-1", "gpf0-2", "gpf0-3", "gpf0-4";
>>> +		samsung,pin-function = <FSD_PIN_FUNC_2>;
>>> +		samsung,pin-pud = <FSD_PIN_PULL_UP>;
>>> +		samsung,pin-drv = <FSD_PIN_DRV_LV6>;
>>> +	};
>>> +
>>> +	eth0_tx_ctrl: eth0-tx-ctrl-pins {
>>> +		samsung,pins = "gpf0-5";
>>> +		samsung,pin-function = <FSD_PIN_FUNC_2>;
>>> +		samsung,pin-pud = <FSD_PIN_PULL_UP>;
>>> +		samsung,pin-drv = <FSD_PIN_DRV_LV6>;
>>> +	};
>>> +
>>> +	eth0_phy_intr: eth0-phy-intr-pins {
>>> +		samsung,pins = "gpf0-6";
>>> +		samsung,pin-function = <FSD_PIN_FUNC_2>;
>>> +		samsung,pin-pud = <FSD_PIN_PULL_NONE>;
>>> +		samsung,pin-drv = <FSD_PIN_DRV_LV4>;
>>> +	};
>>> +
>>> +	eth0_rx_clk: eth0-rx-clk-pins {
>>> +		samsung,pins = "gpf1-0";
>>> +		samsung,pin-function = <FSD_PIN_FUNC_2>;
>>> +		samsung,pin-pud = <FSD_PIN_PULL_UP>;
>>> +		samsung,pin-drv = <FSD_PIN_DRV_LV6>;
>>> +	};
>>> +
>>> +	eth0_rx_data: eth0-rx-data-pins {
>>> +		samsung,pins = "gpf1-1", "gpf1-2", "gpf1-3", "gpf1-4";
>>> +		samsung,pin-function = <FSD_PIN_FUNC_2>;
>>> +		samsung,pin-pud = <FSD_PIN_PULL_UP>;
>>> +		samsung,pin-drv = <FSD_PIN_DRV_LV6>;
>>> +	};
>>> +
>>> +	eth0_rx_ctrl: eth0-rx-ctrl-pins {
>>> +		samsung,pins = "gpf1-5";
>>> +		samsung,pin-function = <FSD_PIN_FUNC_2>;
>>> +		samsung,pin-pud = <FSD_PIN_PULL_UP>;
>>> +		samsung,pin-drv = <FSD_PIN_DRV_LV6>;
>>> +	};
>>> +
>>> +	eth0_mdio: eth0-mdio-pins {
>>> +		samsung,pins = "gpf1-6", "gpf1-7";
>>> +		samsung,pin-function = <FSD_PIN_FUNC_2>;
>>> +		samsung,pin-pud = <FSD_PIN_PULL_NONE>;
>>> +		samsung,pin-drv = <FSD_PIN_DRV_LV4>;
>>> +	};
>>>  };
>>>
>>>  &pinctrl_peric {
>>> diff --git a/arch/arm64/boot/dts/tesla/fsd.dtsi
>>> b/arch/arm64/boot/dts/tesla/fsd.dtsi
>>> index f35bc5a288c2..ade707cc646b 100644
>>> --- a/arch/arm64/boot/dts/tesla/fsd.dtsi
>>> +++ b/arch/arm64/boot/dts/tesla/fsd.dtsi
>>> @@ -32,6 +32,7 @@
>>>  		spi0 = &spi_0;
>>>  		spi1 = &spi_1;
>>>  		spi2 = &spi_2;
>>> +		eth0 = &ethernet_0;
>>
>> This is a friendly reminder during the review process.
>>
>> It seems my previous comments were not fully addressed. Maybe my
>> feedback got lost between the quotes, maybe you just forgot to apply it.
>> Please go back to the previous discussion and either implement all requested
>> changes or keep discussing them.
> Sorry somehow I'm not able to find my previous mail chain.

Why? It is in the lore. I think this proves that responding after half a
year make it difficult for both reviewer and submitter.

> I had replied to your comment in the previous version of the mail.
> In this case alias id is used to differentiate between Ethernet instance 0 and 1 in the driver code.

Nope. Aliases are per board, not per SoC, so how is this supposed to
work if we number them reversed (1->0) in another board?

Best regards,
Krzysztof