linux-kernel - Re: [PATCH net-next v2 3/3] net: stmmac: Add glue layer for Spacemit K3 SoC

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Message-ID: <aXFvWzw1BlooyG7s@inochi.infowork>
Date: Thu, 22 Jan 2026 08:29:46 +0800
From: Inochi Amaoto <inochiama@...il.com>
To: "Russell King (Oracle)" <linux@...linux.org.uk>, 
	Inochi Amaoto <inochiama@...il.com>
Cc: Andrew Lunn <andrew+netdev@...n.ch>, 
	"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Yixun Lan <dlan@...too.org>, 
	Maxime Coquelin <mcoquelin.stm32@...il.com>, Alexandre Torgue <alexandre.torgue@...s.st.com>, 
	Richard Cochran <richardcochran@...il.com>, Paul Walmsley <pjw@...nel.org>, 
	Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
	Alexandre Ghiti <alex@...ti.fr>, Yao Zi <ziyao@...root.org>, 
	Yanteng Si <siyanteng@...oftware.com.cn>, Vladimir Oltean <vladimir.oltean@....com>, 
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>, Chen-Yu Tsai <wens@...nel.org>, 
	Choong Yong Liang <yong.liang.choong@...ux.intel.com>, Shangjuan Wei <weishangjuan@...incomputing.com>, 
	Jernej Skrabec <jernej.skrabec@...il.com>, Boon Khai Ng <boon.khai.ng@...era.com>, 
	Maxime Chevallier <maxime.chevallier@...tlin.com>, Quentin Schulz <quentin.schulz@...rry.de>, 
	Giuseppe Cavallaro <peppe.cavallaro@...com>, Jose Abreu <joabreu@...opsys.com>, netdev@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org, 
	spacemit@...ts.linux.dev, linux-stm32@...md-mailman.stormreply.com, 
	linux-arm-kernel@...ts.infradead.org, Longbin Li <looong.bin@...il.com>
Subject: Re: [PATCH net-next v2 3/3] net: stmmac: Add glue layer for Spacemit
 K3 SoC

On Wed, Jan 21, 2026 at 12:05:30PM +0000, Russell King (Oracle) wrote:
> On Wed, Jan 21, 2026 at 03:13:11PM +0800, Inochi Amaoto wrote:
> > +	mask = RGMII_RX_DLINE_STEP | RGMII_TX_DLINE_CODE | RGMII_TX_DLINE_EN |
> > +	       RGMII_TX_DLINE_STEP | RGMII_RX_DLINE_CODE | RGMII_RX_DLINE_EN;
> > +	val = FIELD_PREP(RGMII_TX_DLINE_STEP, tx_config) |
> > +	      FIELD_PREP(RGMII_TX_DLINE_CODE, tx_code) | RGMII_TX_DLINE_EN |
> > +	      FIELD_PREP(RGMII_RX_DLINE_STEP, rx_config) |
> > +	      FIELD_PREP(RGMII_RX_DLINE_CODE, rx_code) | RGMII_RX_DLINE_EN;
> 
> So your reply where you basically stated that all the RGMII.*DLINE.*
> constants here should be the same was nonsense. How can we trust your
> replies?
> 
> > +static int spacemit_dwmac_fix_delay(struct plat_stmmacenet_data *plat_dat,
> > +				    struct regmap *apmu,
> > +				    unsigned int dline_offset,
> > +				    unsigned int tx_delay, unsigned int rx_delay)
> > +{
> > +	bool mac_rxid = rx_delay != 0;
> > +	bool mac_txid = tx_delay != 0;
> > +	unsigned int rx_config = 0;
> > +	unsigned int tx_config = 0;
> > +	int rx_code;
> > +	int tx_code;
> > +
> > +	plat_dat->phy_interface = phy_fix_phy_mode_for_mac_delays(plat_dat->phy_interface,
> > +								  mac_txid,
> > +								  mac_rxid);
> 
> Maybe Andrew can confirm, but this function was to fix up existing
> broken DT, and shouldn't be used by brand new drivers.
> 
> > +	plat_dat->clk_tx_i = devm_clk_get_enabled(&pdev->dev, "tx");
> > +	if (IS_ERR(plat_dat->clk_tx_i))
> > +		return dev_err_probe(&pdev->dev, PTR_ERR(plat_dat->clk_tx_i),
> > +				     "failed to get tx clock\n");
> 
> As stated on the previous series, please don't abuse clk_tx_i for
> soemthing that isn't the dwmac's clk_tx_i signal.
> 

I have seen this comments, I will switch to a local variable in the
next version

Regards,
Inochi