linux-kernel - Re: [PATCH v4 3/4] phy: spacemit: support K1 USB2.0 PHY controller

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Message-ID: <0a90fb41-6e24-464f-bf2b-cdd76bfb7f08@whut.edu.cn>
Date: Tue, 27 May 2025 00:13:22 +0800
From: Ze Huang <huangze@...t.edu.cn>
To: Neil Armstrong <neil.armstrong@...aro.org>, Vinod Koul
 <vkoul@...nel.org>, Kishon Vijay Abraham I <kishon@...nel.org>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Yixun Lan <dlan@...too.org>,
 Philipp Zabel <p.zabel@...gutronix.de>
Cc: linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
 linux-riscv@...ts.infradead.org, spacemit@...ts.linux.dev,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 3/4] phy: spacemit: support K1 USB2.0 PHY controller

On 5/26/25 11:51 PM, neil.armstrong@...aro.org wrote:
> Hi,
>
> On 26/05/2025 16:31, Ze Huang wrote:
>> The SpacemiT K1 SoC includes three USB ports:
>>
>> - One USB2.0 OTG port
>> - One USB2.0 host-only port
>> - One USB3.0 port with an integrated USB2.0 DRD interface
>>
>> Each of these ports is connected to a USB2.0 PHY responsible for USB2
>> transmission.
>>
>> This commit adds support for the SpacemiT K1 USB2.0 PHY, which is
>> compliant with the USB 2.0 specification and supports both 8-bit 60MHz
>> and 16-bit 30MHz parallel interfaces.
>>
>> Signed-off-by: Ze Huang <huangze@...t.edu.cn>
>> ---
>>   drivers/phy/Kconfig                |   1 +
>>   drivers/phy/Makefile               |   1 +
>>   drivers/phy/spacemit/Kconfig       |  13 ++++
>>   drivers/phy/spacemit/Makefile      |   2 +
>>   drivers/phy/spacemit/phy-k1-usb2.c | 131 
>> +++++++++++++++++++++++++++++++++++++
>>   5 files changed, 148 insertions(+)
>>
...
>> +
>> +static const struct of_device_id spacemit_usb2phy_dt_match[] = {
>> +    { .compatible = "spacemit,k1-usb2-phy", },
>> +    { /* sentinal */ }
>
> => sentinel

Thanks!

>
>> +};
>> +MODULE_DEVICE_TABLE(of, spacemit_usb2phy_dt_match);
>> +
>> +static struct platform_driver spacemit_usb2_phy_driver = {
>> +    .probe    = spacemit_usb2phy_probe,
>> +    .driver = {
>> +        .name   = "spacemit-usb2-phy",
>> +        .of_match_table = spacemit_usb2phy_dt_match,
>> +    },
>> +};
>> +module_platform_driver(spacemit_usb2_phy_driver);
>> +
>> +MODULE_DESCRIPTION("Spacemit USB 2.0 PHY driver");
>> +MODULE_LICENSE("GPL");
>>
>
> It looks fine, but why didn't also convert thid driver to regmap ?

Will do

>
> Thanks,
> Neil
>
>
>