linux-kernel - Re: [PATCH v5 net-next PATCH 1/1] net: phy: air

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Message-ID: <0aa1cebd-be6e-478f-8fb2-8a9072249bd2@gmail.com>
Date: Tue, 18 Mar 2025 22:39:46 +0800
From: "Lucien.Jheng" <lucienx123@...il.com>
To: Daniel Golle <daniel@...rotopia.org>
Cc: linux-clk@...r.kernel.org, andrew@...n.ch, hkallweit1@...il.com,
 linux@...linux.org.uk, kuba@...nel.org, davem@...emloft.net,
 edumazet@...gle.com, pabeni@...hat.com, ericwouds@...il.com,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org, joseph.lin@...oha.com,
 wenshin.chung@...oha.com, lucien.jheng@...oha.com
Subject: Re: [PATCH v5 net-next PATCH 1/1] net: phy: air_en8811h: Add clk
 provider for CKO pin

Hi Daniel

I'll correct those things in the next version,

thank you for the detailed review.


Daniel Golle 於 2025/3/18 下午 09:52 寫道:
> On Tue, Mar 18, 2025 at 09:31:05PM +0800, Lucien.Jheng wrote:
>> EN8811H outputs 25MHz or 50MHz clocks on CKO, selected by GPIO3.
>> CKO clock operates continuously from power-up through md32 loading.
>> Implement clk provider driver so we can disable the clock output in case
>> it isn't needed, which also helps to reduce EMF noise
>>
>> Signed-off-by: Lucien.Jheng <lucienX123@...il.com>
> White-space (tabs vs. spaces) could still be improved. See inline below.
> However, I don't think it's worth another iteration just for that, so
> only should there be comments from other reviewers and you anyway send
> another version, then you can fix that as well.
>
> Other than that:
> Reviewed-by: Daniel Golle <daniel@...rotopia.org>
>
>> ---
>>   drivers/net/phy/air_en8811h.c | 95 +++++++++++++++++++++++++++++++++++
>>   1 file changed, 95 insertions(+)
>>
>> diff --git a/drivers/net/phy/air_en8811h.c b/drivers/net/phy/air_en8811h.c
>> index e9fd24cb7270..47ace7fac1d3 100644
>> --- a/drivers/net/phy/air_en8811h.c
>> +++ b/drivers/net/phy/air_en8811h.c
>> @@ -16,6 +16,7 @@
>>   #include <linux/property.h>
>>   #include <linux/wordpart.h>
>>   #include <linux/unaligned.h>
>> +#include <linux/clk-provider.h>
>>   
>>   #define EN8811H_PHY_ID		0x03a2a411
>>   
>> @@ -112,6 +113,11 @@
>>   #define   EN8811H_POLARITY_TX_NORMAL		BIT(0)
>>   #define   EN8811H_POLARITY_RX_REVERSE		BIT(1)
>>   
>> +#define EN8811H_CLK_CGM     0xcf958
>> +#define EN8811H_CLK_CGM_CKO     BIT(26)
>> +#define EN8811H_HWTRAP1     0xcf914
>> +#define EN8811H_HWTRAP1_CKO     BIT(12)
>> +
> Existing precompiler macro definitions use tab characters between the
> macro name and the assigned value, your newly added ones use spaces.
>
>>   #define EN8811H_GPIO_OUTPUT		0xcf8b8
>>   #define   EN8811H_GPIO_OUTPUT_345		(BIT(3) | BIT(4) | BIT(5))
>>   
>> @@ -142,10 +148,15 @@ struct led {
>>   	unsigned long state;
>>   };
>>   
>> +#define clk_hw_to_en8811h_priv(_hw)			\
>> +	container_of(_hw, struct en8811h_priv, hw)
>> +
>>   struct en8811h_priv {
>>   	u32		firmware_version;
>>   	bool		mcu_needs_restart;
>>   	struct led	led[EN8811H_LED_COUNT];
>> +	struct clk_hw        hw;
>> +	struct phy_device *phydev;
> The existing struct members are indented with tabs, your newly added
> members use spaces. Not a big deal, but it'd be better to use the same
> style.