linux-kernel - Re: [RFC PATCH 2/4] net: phy: Add support for AC200 EPHY

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Message-ID: <74ab97a9-adbc-6a50-d710-eb50017aa47b@gmail.com>
Date:   Fri, 17 Apr 2020 18:16:20 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Jernej Škrabec <jernej.skrabec@...l.net>,
        robh+dt@...nel.org, andrew@...n.ch, f.fainelli@...il.com
Cc:     mripard@...nel.org, wens@...e.org, lee.jones@...aro.org,
        linux@...linux.org.uk, davem@...emloft.net,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [RFC PATCH 2/4] net: phy: Add support for AC200 EPHY

On 17.04.2020 18:15, Jernej Škrabec wrote:
> Dne četrtek, 16. april 2020 ob 22:18:52 CEST je Heiner Kallweit napisal(a):
>> On 16.04.2020 20:57, Jernej Skrabec wrote:
>>> AC200 MFD IC supports Fast Ethernet PHY. Add a driver for it.
>>>
>>> Signed-off-by: Jernej Skrabec <jernej.skrabec@...l.net>
>>> ---
>>>
>>>  drivers/net/phy/Kconfig  |   7 ++
>>>  drivers/net/phy/Makefile |   1 +
>>>  drivers/net/phy/ac200.c  | 206 +++++++++++++++++++++++++++++++++++++++
>>>  3 files changed, 214 insertions(+)
>>>  create mode 100644 drivers/net/phy/ac200.c
>>>
>>> diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
>>> index 3fa33d27eeba..16af69f69eaf 100644
>>> --- a/drivers/net/phy/Kconfig
>>> +++ b/drivers/net/phy/Kconfig
>>> @@ -288,6 +288,13 @@ config ADIN_PHY
>>>
>>>  	  - ADIN1300 - Robust,Industrial, Low Latency 10/100/1000 Gigabit
>>>  	  
>>>  	    Ethernet PHY
>>>
>>> +config AC200_PHY
>>> +	tristate "AC200 EPHY"
>>> +	depends on NVMEM
>>> +	depends on OF
>>> +	help
>>> +	  Fast ethernet PHY as found in X-Powers AC200 multi-function 
> device.
>>> +
>>>
>>>  config AMD_PHY
>>>  
>>>  	tristate "AMD PHYs"
>>>  	---help---
>>>
>>> diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
>>> index 2f5c7093a65b..b0c5b91900fa 100644
>>> --- a/drivers/net/phy/Makefile
>>> +++ b/drivers/net/phy/Makefile
>>> @@ -53,6 +53,7 @@ obj-$(CONFIG_SFP)		+= sfp.o
>>>
>>>  sfp-obj-$(CONFIG_SFP)		+= sfp-bus.o
>>>  obj-y				+= $(sfp-obj-y) $(sfp-obj-m)
>>>
>>> +obj-$(CONFIG_AC200_PHY)		+= ac200.o
>>>
>>>  obj-$(CONFIG_ADIN_PHY)		+= adin.o
>>>  obj-$(CONFIG_AMD_PHY)		+= amd.o
>>>  aquantia-objs			+= aquantia_main.o
>>>
>>> diff --git a/drivers/net/phy/ac200.c b/drivers/net/phy/ac200.c
>>> new file mode 100644
>>> index 000000000000..3d7856ff8f91
>>> --- /dev/null
>>> +++ b/drivers/net/phy/ac200.c
>>> @@ -0,0 +1,206 @@
>>> +// SPDX-License-Identifier: GPL-2.0+
>>> +/**
>>> + * Driver for AC200 Ethernet PHY
>>> + *
>>> + * Copyright (c) 2020 Jernej Skrabec <jernej.skrabec@...l.net>
>>> + */
>>> +
>>> +#include <linux/kernel.h>
>>> +#include <linux/module.h>
>>> +#include <linux/mfd/ac200.h>
>>> +#include <linux/nvmem-consumer.h>
>>> +#include <linux/of.h>
>>> +#include <linux/phy.h>
>>> +#include <linux/platform_device.h>
>>> +
>>> +#define AC200_EPHY_ID			0x00441400
>>> +#define AC200_EPHY_ID_MASK		0x0ffffff0
>>> +
>>
>> You could use PHY_ID_MATCH_MODEL() here.
> 
> Hm... This doesn't work with dynamically allocated memory, right?
> 
Right ..

> Best regards,
> Jernej
> 
>