From: "Arınç ÜNAL" <arinc.unal@arinc9.com>
To: Daniel Golle <daniel@makrotopia.org>
Cc: netdev@vger.kernel.org, linux-mediatek@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, linux@armlinux.org.uk,
linux-kernel@vger.kernel.org, Andrew Lunn <andrew@lunn.ch>,
Florian Fainelli <f.fainelli@gmail.com>,
Vladimir Oltean <olteanv@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>,
Sean Wang <sean.wang@mediatek.com>,
Landen Chao <Landen.Chao@mediatek.com>,
DENG Qingfang <dqfext@gmail.com>,
Philipp Zabel <p.zabel@pengutronix.de>,
Sam Shih <Sam.Shih@mediatek.com>,
Lorenzo Bianconi <lorenzo@kernel.org>,
John Crispin <john@phrozen.org>, Felix Fietkau <nbd@nbd.name>,
Luiz Angelo Daros de Luca <luizluca@gmail.com>
Subject: Re: [PATCH net-next 14/15] net: dsa: mt7530: introduce driver for MT7988 built-in switch
Date: Fri, 31 Mar 2023 23:07:51 +0300 [thread overview]
Message-ID: <56adf82a-3db0-5909-e948-e21717e3fe03@arinc9.com> (raw)
In-Reply-To: <28d048c9-6389-749b-d0eb-18a9c2d83c4e@arinc9.com>
On 31.03.2023 16:18, Arınç ÜNAL wrote:
> On 31.03.2023 15:06, Arınç ÜNAL wrote:
>> On 31.03.2023 13:16, Daniel Golle wrote:
>>> On Fri, Mar 31, 2023 at 08:50:28AM +0300, Arınç ÜNAL wrote:
>>>> On 30.03.2023 18:23, Daniel Golle wrote:
>>>>> Add driver for the built-in Gigabit Ethernet switch which can be found
>>>>> in the MediaTek MT7988 SoC.
>>>>>
>>>>> The switch shares most of its design with MT7530 and MT7531, but has
>>>>> it's registers mapped into the SoCs register space rather than being
>>>>> connected externally or internally via MDIO.
>>>>>
>>>>> Introduce a new platform driver to support that.
>>>>>
>>>>> Signed-off-by: Daniel Golle <daniel@makrotopia.org>
>>>>> ---
>>>>> MAINTAINERS | 2 +
>>>>> drivers/net/dsa/Kconfig | 12 ++++
>>>>> drivers/net/dsa/Makefile | 1 +
>>>>> drivers/net/dsa/mt7530-mmio.c | 101
>>>>> ++++++++++++++++++++++++++++++++++
>>>>> drivers/net/dsa/mt7530.c | 86 ++++++++++++++++++++++++++++-
>>>>> drivers/net/dsa/mt7530.h | 12 ++--
>>>>> 6 files changed, 206 insertions(+), 8 deletions(-)
>>>>> create mode 100644 drivers/net/dsa/mt7530-mmio.c
>>>>>
>>>>> diff --git a/MAINTAINERS b/MAINTAINERS
>>>>> index 14924aed15ca7..674673dbdfd8b 100644
>>>>> --- a/MAINTAINERS
>>>>> +++ b/MAINTAINERS
>>>>> @@ -13174,9 +13174,11 @@ MEDIATEK SWITCH DRIVER
>>>>> M: Sean Wang <sean.wang@mediatek.com>
>>>>> M: Landen Chao <Landen.Chao@mediatek.com>
>>>>> M: DENG Qingfang <dqfext@gmail.com>
>>>>> +M: Daniel Golle <daniel@makrotopia.org>
>>>>> L: netdev@vger.kernel.org
>>>>> S: Maintained
>>>>> F: drivers/net/dsa/mt7530-mdio.c
>>>>> +F: drivers/net/dsa/mt7530-mmio.c
>>>>> F: drivers/net/dsa/mt7530.*
>>>>> F: net/dsa/tag_mtk.c
>>>>> diff --git a/drivers/net/dsa/Kconfig b/drivers/net/dsa/Kconfig
>>>>> index c2551b13324c2..de4d86e37973f 100644
>>>>> --- a/drivers/net/dsa/Kconfig
>>>>> +++ b/drivers/net/dsa/Kconfig
>>>>> @@ -52,6 +52,18 @@ config NET_DSA_MT7530
>>>>> Multi-chip module MT7530 in MT7621AT, MT7621DAT, MT7621ST and
>>>>> MT7623AI SoCs is supported as well.
>>>>> +config NET_DSA_MT7988
>>>>> + tristate "MediaTek MT7988 built-in Ethernet switch support"
>>>>> + select NET_DSA_MT7530_COMMON
>>>>> + depends on HAS_IOMEM
>>>>> + help
>>>>> + This enables support for the built-in Ethernet switch found
>>>>> + in the MediaTek MT7988 SoC.
>>>>> + The switch is a similar design as MT7531, however, unlike
>>>>> + other MT7530 and MT7531 the switch registers are directly
>>>>> + mapped into the SoCs register space rather than being
>>>>> accessible
>>>>> + via MDIO.
>>>>> +
>>>>> config NET_DSA_MV88E6060
>>>>> tristate "Marvell 88E6060 ethernet switch chip support"
>>>>> select NET_DSA_TAG_TRAILER
>>>>> diff --git a/drivers/net/dsa/Makefile b/drivers/net/dsa/Makefile
>>>>> index 71250d7dd41af..103a33e20de4b 100644
>>>>> --- a/drivers/net/dsa/Makefile
>>>>> +++ b/drivers/net/dsa/Makefile
>>>>> @@ -8,6 +8,7 @@ endif
>>>>> obj-$(CONFIG_NET_DSA_LANTIQ_GSWIP) += lantiq_gswip.o
>>>>> obj-$(CONFIG_NET_DSA_MT7530_COMMON) += mt7530.o
>>>>> obj-$(CONFIG_NET_DSA_MT7530) += mt7530-mdio.o
>>>>> +obj-$(CONFIG_NET_DSA_MT7988) += mt7530-mmio.o
>>>>
>>>> I'm not fond of this way. Wouldn't it be better if we split the mdio
>>>> and
>>>> mmio drivers to separate modules and kept switch hardware support on
>>>> mt7530.c?
>>>
>>> You mean this in terms of Kconfig symbols?
>>> Because the way you describe is basically what I'm doing here:
>>> * mt7530.c is the shared/common switch hardware driver
>>> * mt7530-mdio.c contains the MDIO accessors and MDIO device drivers
>>> for
>>> MT7530, MT7531, MT7621, MT7623, ...
>>> * mt7530-mmio.c contains the platform device driver for in-SoC
>>> switches
>>> which are accessed via MMIO, ie. MT7988 (and yes, this could be
>>> extended to also support MT7620A/N).
>>
>> Ok great.
>>
>>>
>>> In early drafts I also named the Kconfig symbols
>>> CONFIG_NET_DSA_MT7530 for mt7530.c (ie. the common part)
>>> CONFIG_NET_DSA_MT7530_MDIO for the MDIO driver
>>> CONFIG_NET_DSA_MT7530_MMIO for the MMIO driver
>>>
>>> However, as existing kernel configurations expect
>>> CONFIG_NET_DSA_MT7530 to
>>> select the MDIO driver, I decided it would be better to hide the
>>> symbol of
>>> the common part and have CONFIG_NET_DSA_MT7530 select the MDIO driver
>>> like
>>> it was before.
>>
>> You can "imply NET_DSA_MT7530_MDIO" from NET_DSA_MT7530 so the MDIO
>> driver is also enabled when NET_DSA_MT7530 is selected. For example,
>> on Realtek, both MDIO and SMI drivers are enabled by default when
>> either of the main drivers are selected.
>>
>> config NET_DSA_MT7530
>> tristate "MediaTek MT7530 and MT7531 Ethernet switch support"
>> select NET_DSA_TAG_MTK
>> select MEDIATEK_GE_PHY
>> select PCS_MTK_LYNXI
>> imply NET_DSA_MT7530_MDIO
>> imply NET_DSA_MT7530_MMIO
>
> The final kconfig should look like this:
>
> config NET_DSA_MT7530
> tristate "MediaTek MT7530 and MT7531 Ethernet switch support"
> select NET_DSA_TAG_MTK
> select MEDIATEK_GE_PHY
> select PCS_MTK_LYNXI
Looks like PCS_MTK_LYNXI is used on NET_DSA_MT7530_MDIO instead now. I
also see '#include <linux/pcs/pcs-mtk-lynxi.h>' on mt7530.c but don't
see any functions called on it. Leftover?
> imply NET_DSA_MT7530_MDIO
> imply NET_DSA_MT7530_MMIO
> help
> This enables support for the MediaTek MT7530 and MT7531 Ethernet
> switch chips. Multi-chip module MT7530 in MT7621AT, MT7621DAT,
> MT7621ST and MT7623AI SoCs, and built-in switch in MT7688 SoC is
> supported.
>
> config NET_DSA_MT7530_MDIO
> tristate "MediaTek MT7530 MDIO interface driver"
Should go here:
select PCS_MTK_LYNXI
Arınç
next prev parent reply other threads:[~2023-03-31 20:09 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-30 15:19 [PATCH net-next 00/15] net: dsa: add support for MT7988 Daniel Golle
2023-03-30 15:19 ` [PATCH net-next 01/15] net: dsa: mt7530: make some noise if register read fails Daniel Golle
2023-03-30 20:58 ` Andrew Lunn
2023-03-30 15:19 ` [PATCH net-next 02/15] net: dsa: mt7530: refactor SGMII PCS creation Daniel Golle
2023-03-30 20:59 ` Andrew Lunn
2023-03-30 15:20 ` [PATCH net-next 03/15] net: dsa: mt7530: use unlocked regmap accessors Daniel Golle
2023-03-30 21:01 ` Andrew Lunn
2023-03-30 15:20 ` [PATCH net-next 04/15] net: dsa: mt7530: use regmap to access switch register space Daniel Golle
2023-03-30 21:02 ` Andrew Lunn
2023-03-31 2:28 ` Daniel Golle
2023-03-30 15:21 ` [PATCH net-next 05/15] net: dsa: mt7530: move SGMII PCS creation to mt7530_probe function Daniel Golle
2023-03-30 21:02 ` Andrew Lunn
2023-03-30 15:21 ` [PATCH net-next 06/15] net: dsa: mt7530: introduce mutex helpers Daniel Golle
2023-03-30 15:21 ` [PATCH net-next 07/15] net: dsa: mt7530: move p5_intf_modes() function to mt7530.c Daniel Golle
2023-03-30 15:22 ` [PATCH net-next 08/15] net: dsa: mt7530: introduce mt7530_probe_common helper function Daniel Golle
2023-03-30 15:22 ` [PATCH net-next 09/15] net: dsa: mt7530: introduce mt7530_remove_common " Daniel Golle
2023-03-30 15:22 ` [PATCH net-next 10/15] net: dsa: mt7530: split-off common parts from mt7531_setup Daniel Golle
2023-03-30 15:22 ` [PATCH net-next 11/15] net: dsa: mt7530: introduce separate MDIO driver Daniel Golle
2023-03-30 15:23 ` [PATCH net-next 12/15] net: dsa: mt7530: skip locking if MDIO bus isn't present Daniel Golle
2023-03-30 15:23 ` [PATCH net-next 13/15] net: dsa: mt7530: add support for 10G link modes for CPU port Daniel Golle
2023-04-01 8:56 ` Arınç ÜNAL
2023-04-01 13:05 ` Daniel Golle
2023-03-30 15:23 ` [PATCH net-next 14/15] net: dsa: mt7530: introduce driver for MT7988 built-in switch Daniel Golle
2023-03-30 21:03 ` Andrew Lunn
2023-03-31 5:50 ` Arınç ÜNAL
2023-03-31 10:16 ` Daniel Golle
2023-03-31 12:06 ` Arınç ÜNAL
2023-03-31 12:45 ` Andrew Lunn
2023-03-31 13:18 ` Arınç ÜNAL
2023-03-31 13:19 ` Arınç ÜNAL
2023-03-31 14:10 ` Daniel Golle
2023-03-31 14:11 ` Arınç ÜNAL
2023-03-31 20:07 ` Arınç ÜNAL [this message]
2023-03-31 20:33 ` Daniel Golle
2023-04-01 8:05 ` Luiz Angelo Daros de Luca
2023-03-30 15:23 ` [PATCH 15/15] dt-bindings: net: dsa: mediatek,mt7530: add mediatek,mt7988-switch Daniel Golle
2023-03-31 5:27 ` Arınç ÜNAL
2023-04-03 18:23 ` Daniel Golle
2023-03-31 5:27 ` [PATCH net-next 00/15] net: dsa: add support for MT7988 Arınç ÜNAL
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