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

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Message-ID: <e3d2ff98-8d05-fdf7-7df6-a5450c6cdc21@linaro.org>
Date:   Mon, 14 Aug 2023 21:55:02 +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 4/4] arm64: dts: fsd: Add Ethernet support for PERIC
 Block of FSD SoC

On 14/08/2023 12:27, Sriranjani P wrote:
> 
> 
>> -----Original Message-----
>> From: Krzysztof Kozlowski [mailto:krzysztof.kozlowski@...aro.org]
>> Sent: 12 January 2023 15:07
>> 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 4/4] arm64: dts: fsd: Add Ethernet support for PERIC
>> 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 PERIC 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         | 29 +++++++++++
>>>  3 files changed, 94 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/tesla/fsd-evb.dts
>>> b/arch/arm64/boot/dts/tesla/fsd-evb.dts
>>> index ca0c1a28d562..2c0cbe775e04 100644
>>> --- a/arch/arm64/boot/dts/tesla/fsd-evb.dts
>>> +++ b/arch/arm64/boot/dts/tesla/fsd-evb.dts
>>> @@ -39,6 +39,15 @@
>>>  	};
>>>  };
>>>
>>> +&ethernet_1 {
>>> +	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 7ccc0738a149..c955bf159786 100644
>>> --- a/arch/arm64/boot/dts/tesla/fsd-pinctrl.dtsi
>>> +++ b/arch/arm64/boot/dts/tesla/fsd-pinctrl.dtsi
>>> @@ -395,6 +395,62 @@
>>>  		samsung,pin-pud = <FSD_PIN_PULL_UP>;
>>>  		samsung,pin-drv = <FSD_PIN_DRV_LV1>;
>>>  	};
>>> +
>>> +	eth1_tx_clk: eth1-tx-clk-pins {
>>> +		samsung,pins = "gpf2-0";
>>> +		samsung,pin-function = <FSD_PIN_FUNC_2>;
>>> +		samsung,pin-pud = <FSD_PIN_PULL_DOWN>;
>>> +		samsung,pin-drv = <FSD_PIN_DRV_LV6>;
>>> +	};
>>> +
>>> +	eth1_tx_data: eth1-tx-data-pins {
>>> +		samsung,pins = "gpf2-1", "gpf2-2", "gpf2-3", "gpf2-4";
>>> +		samsung,pin-function = <FSD_PIN_FUNC_2>;
>>> +		samsung,pin-pud = <FSD_PIN_PULL_UP>;
>>> +		samsung,pin-drv = <FSD_PIN_DRV_LV6>;
>>> +	};
>>> +
>>> +	eth1_tx_ctrl: eth1-tx-ctrl-pins {
>>> +		samsung,pins = "gpf2-5";
>>> +		samsung,pin-function = <FSD_PIN_FUNC_2>;
>>> +		samsung,pin-pud = <FSD_PIN_PULL_UP>;
>>> +		samsung,pin-drv = <FSD_PIN_DRV_LV6>;
>>> +	};
>>> +
>>> +	eth1_phy_intr: eth1-phy-intr-pins {
>>> +		samsung,pins = "gpf2-6";
>>> +		samsung,pin-function = <FSD_PIN_FUNC_2>;
>>> +		samsung,pin-pud = <FSD_PIN_PULL_UP>;
>>> +		samsung,pin-drv = <FSD_PIN_DRV_LV4>;
>>> +	};
>>> +
>>> +	eth1_rx_clk: eth1-rx-clk-pins {
>>> +		samsung,pins = "gpf3-0";
>>> +		samsung,pin-function = <FSD_PIN_FUNC_2>;
>>> +		samsung,pin-pud = <FSD_PIN_PULL_UP>;
>>> +		samsung,pin-drv = <FSD_PIN_DRV_LV6>;
>>> +	};
>>> +
>>> +	eth1_rx_data: eth1-rx-data-pins {
>>> +		samsung,pins = "gpf3-1", "gpf3-2", "gpf3-3", "gpf3-4";
>>> +		samsung,pin-function = <FSD_PIN_FUNC_2>;
>>> +		samsung,pin-pud = <FSD_PIN_PULL_UP>;
>>> +		samsung,pin-drv = <FSD_PIN_DRV_LV6>;
>>> +	};
>>> +
>>> +	eth1_rx_ctrl: eth1-rx-ctrl-pins {
>>> +		samsung,pins = "gpf3-5";
>>> +		samsung,pin-function = <FSD_PIN_FUNC_2>;
>>> +		samsung,pin-pud = <FSD_PIN_PULL_UP>;
>>> +		samsung,pin-drv = <FSD_PIN_DRV_LV6>;
>>> +	};
>>> +
>>> +	eth1_mdio: eth1-mdio-pins {
>>> +		samsung,pins = "gpf3-6", "gpf3-7";
>>> +		samsung,pin-function = <FSD_PIN_FUNC_2>;
>>> +		samsung,pin-pud = <FSD_PIN_PULL_UP>;
>>> +		samsung,pin-drv = <FSD_PIN_DRV_LV4>;
>>> +	};
>>>  };
>>>
>>>  &pinctrl_pmu {
>>> diff --git a/arch/arm64/boot/dts/tesla/fsd.dtsi
>>> b/arch/arm64/boot/dts/tesla/fsd.dtsi
>>> index ade707cc646b..8807055807dd 100644
>>> --- a/arch/arm64/boot/dts/tesla/fsd.dtsi
>>> +++ b/arch/arm64/boot/dts/tesla/fsd.dtsi
>>> @@ -33,6 +33,7 @@
>>>  		spi1 = &spi_1;
>>>  		spi2 = &spi_2;
>>>  		eth0 = &ethernet_0;
>>> +		eth1 = &ethernet_1;
>>
>> Nope for the reasons I explained last time.
> Sorry somehow I'm not able to find my previous mail chain.

If you reply like this after half a year, what can I say? Is that a
reason to ignore the feedback? No.

Just use the lore and find it:
https://lore.kernel.org/all/4fd9dabb-c8f3-b826-2eb2-ab8b5816102a@linaro.org/

> 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.

NAK.

>>
>>>  	};
>>>
>>>  	cpus {
>>> @@ -882,6 +883,34 @@
>>>  			phy-mode = "rgmii";
>>>  			status = "disabled";
>>>  		};
>>> +
>>> +		ethernet_1: ethernet@...00000 {
>>
>> Do not add nodes to the end.
> If you mean to say that the nodes are supposed to be in the increasing order of physical address,
> I can see that the existing file is not arranged in that format. If that is required I can first fix the
> existing file and post the revised patch for the same. 

You can drop it in some place more or less matching its address, just
not to the end.

Best regards,
Krzysztof