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Message-ID: <eea0ef13-58e9-4541-ac67-8246602b8e5d@foss.st.com>
Date: Tue, 11 Jun 2024 08:42:35 +0200
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Subject: Re: [net-next,PATCH v6 7/8] net: stmmac: dwmac-stm32: Mask support
 for PMCR configuration
To: Marek Vasut <marex@denx.de>, "David S . Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>,
        Paolo
 Abeni <pabeni@redhat.com>, Rob Herring <robh+dt@kernel.org>,
        Krzysztof
 Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley
	<conor+dt@kernel.org>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
        Alexandre
 Torgue <alexandre.torgue@foss.st.com>,
        Richard Cochran
	<richardcochran@gmail.com>,
        Jose Abreu <joabreu@synopsys.com>,
        Liam Girdwood
	<lgirdwood@gmail.com>, Mark Brown <broonie@kernel.org>
CC: <netdev@vger.kernel.org>, <devicetree@vger.kernel.org>,
        <linux-stm32@st-md-mailman.stormreply.com>,
        <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>
References: <20240610071459.287500-1-christophe.roullier@foss.st.com>
 <20240610071459.287500-8-christophe.roullier@foss.st.com>
 <20139233-4e95-4fe5-84ca-734ee866afca@denx.de>
 <c5ea12e7-5ee6-4960-9141-e774ccd9977b@foss.st.com>
 <09105afe-1123-407a-96c3-2ea88602aad0@denx.de>
 <91af5c61-f23f-4f72-a8c8-f32b2c368768@foss.st.com>
 <bf3238fb-4fad-49b2-975c-e35d93cafe7c@denx.de>
Content-Language: en-US
From: Christophe ROULLIER <christophe.roullier@foss.st.com>
In-Reply-To: <bf3238fb-4fad-49b2-975c-e35d93cafe7c@denx.de>
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On 6/10/24 19:29, Marek Vasut wrote:
> On 6/10/24 3:49 PM, Christophe ROULLIER wrote:
>>
>> On 6/10/24 15:43, Marek Vasut wrote:
>>> On 6/10/24 1:45 PM, Christophe ROULLIER wrote:
>>>>
>>>> On 6/10/24 12:39, Marek Vasut wrote:
>>>>> On 6/10/24 9:14 AM, Christophe Roullier wrote:
>>>>>
>>>>> [...]
>>>>>
>>>>>>   static int stm32mp1_set_mode(struct plat_stmmacenet_data 
>>>>>> *plat_dat)
>>>>>> @@ -303,7 +307,7 @@ static int stm32mcu_set_mode(struct 
>>>>>> plat_stmmacenet_data *plat_dat)
>>>>>>       dev_dbg(dwmac->dev, "Mode %s", 
>>>>>> phy_modes(plat_dat->mac_interface));
>>>>>>         return regmap_update_bits(dwmac->regmap, reg,
>>>>>> -                 dwmac->ops->syscfg_eth_mask, val << 23);
>>>>>> +                 SYSCFG_MCU_ETH_MASK, val << 23);
>>>>>>   }
>>>>>>     static void stm32_dwmac_clk_disable(struct stm32_dwmac 
>>>>>> *dwmac, bool suspend)
>>>>>> @@ -348,8 +352,15 @@ static int stm32_dwmac_parse_data(struct 
>>>>>> stm32_dwmac *dwmac,
>>>>>>           return PTR_ERR(dwmac->regmap);
>>>>>>         err = of_property_read_u32_index(np, "st,syscon", 1, 
>>>>>> &dwmac->mode_reg);
>>>>>> -    if (err)
>>>>>> +    if (err) {
>>>>>>           dev_err(dev, "Can't get sysconfig mode offset (%d)\n", 
>>>>>> err);
>>>>>> +        return err;
>>>>>> +    }
>>>>>> +
>>>>>> +    dwmac->mode_mask = SYSCFG_MP1_ETH_MASK;
>>>>>> +    err = of_property_read_u32_index(np, "st,syscon", 2, 
>>>>>> &dwmac->mode_mask);
>>>>>> +    if (err)
>>>>>> +        dev_dbg(dev, "Warning sysconfig register mask not set\n");
>>>>>
>>>>> Isn't this an error , so dev_err() ?
>>>> No, it is only "warning" information, for MP1 the mask is not 
>>>> needed (and for backward compatibility is not planned to put mask 
>>>> parameter mandatory)
>>>
>>> Should this be an error for anything newer than MP15 then ?
>> For MP25, no need of mask, so for moment it is specific to MP13.
>
> Make this a warning for MP15, error for MP13, do not check st,syscon 
> presence for MP2 at all. Would that work ?
Ok I will make a warning for MP15 and MP25 and error for MP13.