From: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
To: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Cc: Andrew Lunn <andrew@lunn.ch>, Lee Jones <lee@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Emil Renner Berthing <kernel@esmil.dk>,
Conor Dooley <conor@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Giuseppe Cavallaro <peppe.cavallaro@st.com>,
Alexandre Torgue <alexandre.torgue@foss.st.com>,
Jose Abreu <joabreu@synopsys.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Richard Cochran <richardcochran@gmail.com>,
Sagar Kadam <sagar.kadam@sifive.com>,
Yanhong Wang <yanhong.wang@starfivetech.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, linux-riscv@lists.infradead.org,
linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org, kernel@collabora.com
Subject: Re: [PATCH 08/12] net: stmmac: Add glue layer for StarFive JH7100 SoC
Date: Wed, 15 Feb 2023 13:51:26 +0200 [thread overview]
Message-ID: <68708ef5-9a7f-b7e5-a7a0-e08f6d5ae3a3@collabora.com> (raw)
In-Reply-To: <CAJM55Z8Uq2ZU3KvJZKDLZUJDLEyvHjCRJKcYn5CAOR0c2rhT7Q@mail.gmail.com>
On 2/15/23 13:20, Emil Renner Berthing wrote:
> On Wed, 15 Feb 2023 at 01:09, Cristian Ciocaltea
> <cristian.ciocaltea@collabora.com> wrote:
>>
>> On 2/11/23 18:11, Andrew Lunn wrote:
>>>> +
>>>> +#define JH7100_SYSMAIN_REGISTER28 0x70
>>>> +/* The value below is not a typo, just really bad naming by StarFive ¯\_(ツ)_/¯ */
>>>> +#define JH7100_SYSMAIN_REGISTER49 0xc8
>>>
>>> Seems like the comment should be one line earlier?
>
> Well yes, the very generic register names are also bad, but this
> comment refers to the fact that it kind of makes sense that register
> 28 has the offset
> 28 * 4 bytes pr. register = 0x70
> ..but then register 49 is oddly out of place at offset 0xc8 instead of
> 49 * 4 bytes pr. register = 0xc4
>
>>> There is value in basing the names on the datasheet, but you could
>>> append something meaningful on the end:
>>>
>>> #define JH7100_SYSMAIN_REGISTER49_DLYCHAIN 0xc8
>>
>> Unfortunately the JH7100 datasheet I have access to doesn't provide any
>> information regarding the SYSCTRL-MAINSYS related registers. Maybe Emil
>> could provide some details here?
>
> This is reverse engineered from the auto generated headers in their u-boot:
> https://github.com/starfive-tech/u-boot/blob/JH7100_VisionFive_devel/arch/riscv/include/asm/arch-jh7100/syscon_sysmain_ctrl_macro.h
>
> Christian, I'm happy that you're working on this, but mess like this
> and waiting for the non-coherent dma to be sorted is why I didn't send
> it upstream yet.
Thank you for clarifying this and for all the work you have done so far,
Emil! If you don't mind, I would be glad to continue helping with this
mainlining effort.
>>>> + if (!of_property_read_u32(np, "starfive,gtxclk-dlychain", >xclk_dlychain)) {
>>>> + ret = regmap_write(sysmain, JH7100_SYSMAIN_REGISTER49, gtxclk_dlychain);
>>>> + if (ret)
>>>> + return dev_err_probe(dev, ret, "error selecting gtxclk delay chain\n");
>>>> + }
>>>
>>> You should probably document that if starfive,gtxclk-dlychain is not
>>> found in the DT blob, the value for the delay chain is undefined. It
>>> would actually be better to define it, set it to 0 for example. That
>>> way, you know you don't have any dependency on the bootloader for
>>> example.
>>
>> Sure, I will set it to 0.
>>
>>>
>>> Andrew
>>
>> Thanks for reviewing,
>> Cristian
>>
>> _______________________________________________
>> linux-riscv mailing list
>> linux-riscv@lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-riscv
next prev parent reply other threads:[~2023-02-15 11:51 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-11 3:18 [PATCH 00/12] Enable networking support for StarFive JH7100 SoC Cristian Ciocaltea
2023-02-11 3:18 ` [PATCH 01/12] dt-bindings: riscv: sifive-ccache: Add compatible " Cristian Ciocaltea
2023-02-13 9:20 ` Krzysztof Kozlowski
2023-02-14 20:40 ` Conor Dooley
2023-02-15 13:11 ` Emil Renner Berthing
2023-03-20 23:46 ` Palmer Dabbelt
2023-02-11 3:18 ` [PATCH 02/12] dt-bindings: riscv: sifive-ccache: Add 'uncached-offset' property Cristian Ciocaltea
2023-02-13 9:23 ` Krzysztof Kozlowski
2023-02-14 17:58 ` Cristian Ciocaltea
2023-02-16 21:53 ` Conor Dooley
2023-02-11 3:18 ` [PATCH 03/12] soc: sifive: ccache: Add StarFive JH7100 support Cristian Ciocaltea
2023-03-06 23:32 ` Conor Dooley
2023-03-06 23:46 ` Cristian Ciocaltea
2023-02-11 3:18 ` [PATCH 04/12] soc: sifive: ccache: Add non-coherent DMA handling Cristian Ciocaltea
2023-02-16 18:50 ` Conor Dooley
2023-02-19 21:32 ` Emil Renner Berthing
2023-02-20 11:43 ` Conor Dooley
2023-02-11 3:18 ` [PATCH 05/12] riscv: Implement non-coherent DMA support via SiFive cache flushing Cristian Ciocaltea
2023-02-13 8:30 ` Ben Dooks
2023-02-14 18:06 ` Cristian Ciocaltea
2023-02-14 18:17 ` Conor Dooley
2023-02-11 3:18 ` [PATCH 06/12] dt-bindings: mfd: syscon: Add StarFive JH7100 sysmain compatible Cristian Ciocaltea
2023-02-13 9:23 ` Krzysztof Kozlowski
2023-03-03 11:52 ` Lee Jones
2023-02-11 3:18 ` [PATCH 07/12] dt-bindings: net: Add StarFive JH7100 SoC Cristian Ciocaltea
2023-02-11 16:01 ` Andrew Lunn
2023-02-15 0:34 ` Cristian Ciocaltea
2023-02-15 13:01 ` Andrew Lunn
2023-02-16 15:51 ` Cristian Ciocaltea
2023-02-16 17:54 ` Andrew Lunn
2023-02-17 0:32 ` Cristian Ciocaltea
2023-02-17 13:30 ` Andrew Lunn
2023-02-17 15:25 ` Cristian Ciocaltea
2023-02-13 9:25 ` Krzysztof Kozlowski
2023-02-11 3:18 ` [PATCH 08/12] net: stmmac: Add glue layer for " Cristian Ciocaltea
2023-02-11 16:11 ` Andrew Lunn
2023-02-15 0:08 ` Cristian Ciocaltea
2023-02-15 11:20 ` Emil Renner Berthing
2023-02-15 11:51 ` Cristian Ciocaltea [this message]
2023-02-15 12:51 ` Andrew Lunn
2023-02-13 9:26 ` Krzysztof Kozlowski
2023-02-14 18:12 ` Cristian Ciocaltea
2023-02-11 3:18 ` [PATCH 09/12] riscv: dts: starfive: Add dma-noncoherent for " Cristian Ciocaltea
2023-02-11 3:18 ` [PATCH 10/12] riscv: dts: starfive: jh7100: Add ccache DT node Cristian Ciocaltea
2023-02-11 3:18 ` [PATCH 11/12] riscv: dts: starfive: jh7100: Add sysmain and gmac DT nodes Cristian Ciocaltea
2023-02-13 9:26 ` Krzysztof Kozlowski
2023-02-14 18:15 ` Cristian Ciocaltea
2023-02-11 3:18 ` [PATCH 12/12] riscv: dts: starfive: jh7100-common: Setup pinmux and enable gmac Cristian Ciocaltea
2023-02-11 11:11 ` [PATCH 00/12] Enable networking support for StarFive JH7100 SoC Conor Dooley
2023-02-11 11:53 ` Cristian Ciocaltea
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