linux-kernel - Re: Re: [PATCH v3 2/2] ethernet: eswin: Add eic7700 ethernet driver

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Message-ID: <2e8343eb.34d0.1980d8fa817.Coremail.lizhi2@eswincomputing.com>
Date: Tue, 15 Jul 2025 18:09:35 +0800 (GMT+08:00)
From: 李志 <lizhi2@...incomputing.com>
To: "Krzysztof Kozlowski" <krzk@...nel.org>
Cc: weishangjuan@...incomputing.com, andrew+netdev@...n.ch,
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Subject: Re: Re: [PATCH v3 2/2] ethernet: eswin: Add eic7700 ethernet driver

Dear Krzysztof Kozlowski,

Thank you for your professional and valuable suggestions.
Our question is embedded below your comment.

Best regards,


Li Zhi
Eswin Computing

> Subject: Re: [PATCH v3 2/2] ethernet: eswin: Add eic7700 ethernet driver
> Date: Thu, 3 Jul 2025 11:53:33 +0200	[thread overview]
> Message-ID: <f096afa1-260e-4f8c-8595-3b41425b2964@...nel.org> (raw)
> In-Reply-To: <20250703092015.1200-1-weishangjuan@...incomputing.com>
> On 03/07/2025 11:20, weishangjuan@...incomputing.com wrote:
> > +	ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,syscrg_csr", 1,
> > +					 &hsp_aclk_ctrl_offset);
> > +	if (ret)
> > +		return dev_err_probe(&pdev->dev, ret, "can't get hsp_aclk_ctrl_offset\n");
> > +
> > +	regmap_read(dwc_priv->crg_regmap, hsp_aclk_ctrl_offset, &hsp_aclk_ctrl_regset);
> > +	hsp_aclk_ctrl_regset |= (EIC7700_HSP_ACLK_CLKEN | EIC7700_HSP_ACLK_DIVSOR);
> > +	regmap_write(dwc_priv->crg_regmap, hsp_aclk_ctrl_offset, hsp_aclk_ctrl_regset);
> > +
> > > +	ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,syscrg_csr", 2,
> > +					 &hsp_cfg_ctrl_offset);
> > +	if (ret)
> > +		return dev_err_probe(&pdev->dev, ret, "can't get hsp_cfg_ctrl_offset\n");
> > +
> > +	regmap_write(dwc_priv->crg_regmap, hsp_cfg_ctrl_offset, EIC7700_HSP_CFG_CTRL_REGSET);
> > +
> > +	dwc_priv->hsp_regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
> > +							       "eswin,hsp_sp_csr");
> 
> There is no such property. I already said at v2 you cannot have
> undocumented ABI.
> 

The properties in the YAML file use dashes, while the driver uses underscores, resulting in an inconsistency. This will be corrected in the next patch. Is this correct?

> > +	if (IS_ERR(dwc_priv->hsp_regmap))
> > +		return dev_err_probe(&pdev->dev, PTR_ERR(dwc_priv->hsp_regmap),
> > +				"Failed to get hsp_sp_csr regmap\n");
> > +
> > +	ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,hsp_sp_csr", 2,
> 
> NAK
> 
> > +					 &eth_phy_ctrl_offset);
> > +	if (ret)
> > +		return dev_err_probe(&pdev->dev, ret, "can't get eth_phy_ctrl_offset\n");
> > +
> > +	regmap_read(dwc_priv->hsp_regmap, eth_phy_ctrl_offset, &eth_phy_ctrl_regset);
> > +	eth_phy_ctrl_regset |= (EIC7700_ETH_TX_CLK_SEL | EIC7700_ETH_PHY_INTF_SELI);
> > +	regmap_write(dwc_priv->hsp_regmap, eth_phy_ctrl_offset, eth_phy_ctrl_regset);
> > +
> > +	ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,hsp_sp_csr", 3,
> > +					 &eth_axi_lp_ctrl_offset);
> > +	if (ret)
> > +		return dev_err_probe(&pdev->dev, ret, "can't get eth_axi_lp_ctrl_offset\n");
> > +
> > +	regmap_write(dwc_priv->hsp_regmap, eth_axi_lp_ctrl_offset, EIC7700_ETH_CSYSREQ_VAL);
> > +
> > +	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),
> > +				"error getting tx clock\n");
> > +
> > +	plat_dat->fix_mac_speed = eic7700_qos_fix_speed;
> > +	plat_dat->set_clk_tx_rate = stmmac_set_clk_tx_rate;
> > +	plat_dat->bsp_priv = dwc_priv;
> > +
> > +	ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
> > +	if (ret)
> > +		return dev_err_probe(&pdev->dev, ret, "Failed to driver probe\n");
> > +
> > +	return ret;
> > +}
> > +
> > +static const struct of_device_id eic7700_dwmac_match[] = {
> > +	{ .compatible = "eswin,eic7700-qos-eth" },
> > +	{ }
> > +};
> > +MODULE_DEVICE_TABLE(of, eic7700_dwmac_match);
> > +
> > +static struct platform_driver eic7700_dwmac_driver = {
> +	.probe  = eic7700_dwmac_probe,
> +	.remove = stmmac_pltfr_remove,
> +	.driver = {
> +		.name           = "eic7700-eth-dwmac",
> +		.pm             = &stmmac_pltfr_pm_ops,
> +		.of_match_table = eic7700_dwmac_match,
> +	},
> +};
> +module_platform_driver(eic7700_dwmac_driver);
> +
> +MODULE_AUTHOR("Eswin");
> 
> Drop, that's not a person.
> 
> 
> Best regards,
> Krzysztof