linux-kernel - Re: [PATCH 2/2] PCI: dwc: layerscape: Use syscon_regmap_lookup_by_phandle

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Message-ID: <Z4U5Ljw+ro3BRHSd@lizhi-Precision-Tower-5810>
Date: Mon, 13 Jan 2025 11:02:54 -0500
From: Frank Li <Frank.li@....com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: Vignesh Raghavendra <vigneshr@...com>,
	Siddharth Vadapalli <s-vadapalli@...com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
	Minghuan Lian <minghuan.Lian@....com>,
	Mingkai Hu <mingkai.hu@....com>, Roy Zang <roy.zang@....com>,
	linux-omap@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, imx@...ts.linux.dev
Subject: Re: [PATCH 2/2] PCI: dwc: layerscape: Use
 syscon_regmap_lookup_by_phandle_args

On Sun, Jan 12, 2025 at 02:39:03PM +0100, Krzysztof Kozlowski wrote:
> Use syscon_regmap_lookup_by_phandle_args() which is a wrapper over
> syscon_regmap_lookup_by_phandle() combined with getting the syscon
> argument.  Except simpler code this annotates within one line that given
> phandle has arguments, so grepping for code would be easier.
>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Reviewed-by: Frank Li <Frank.Li@....com>

> ---
>  drivers/pci/controller/dwc/pci-layerscape.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/pci/controller/dwc/pci-layerscape.c b/drivers/pci/controller/dwc/pci-layerscape.c
> index ee6f5256813374bdf656bef4f9b96e1b8760d1b5..239a05b36e8e6291b195f1253289af79f4a86d36 100644
> --- a/drivers/pci/controller/dwc/pci-layerscape.c
> +++ b/drivers/pci/controller/dwc/pci-layerscape.c
> @@ -329,7 +329,6 @@ static int ls_pcie_probe(struct platform_device *pdev)
>  	struct ls_pcie *pcie;
>  	struct resource *dbi_base;
>  	u32 index[2];
> -	int ret;
>
>  	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
>  	if (!pcie)
> @@ -355,16 +354,15 @@ static int ls_pcie_probe(struct platform_device *pdev)
>  	pcie->pf_lut_base = pci->dbi_base + pcie->drvdata->pf_lut_off;
>
>  	if (pcie->drvdata->scfg_support) {
> -		pcie->scfg = syscon_regmap_lookup_by_phandle(dev->of_node, "fsl,pcie-scfg");
> +		pcie->scfg =
> +			syscon_regmap_lookup_by_phandle_args(dev->of_node,
> +							     "fsl,pcie-scfg", 2,
> +							     index);
>  		if (IS_ERR(pcie->scfg)) {
>  			dev_err(dev, "No syscfg phandle specified\n");
>  			return PTR_ERR(pcie->scfg);
>  		}
>
> -		ret = of_property_read_u32_array(dev->of_node, "fsl,pcie-scfg", index, 2);
> -		if (ret)
> -			return ret;
> -
>  		pcie->index = index[1];
>  	}
>
>
> --
> 2.43.0
>