linux-kernel - Re: [PATCH V2 4/4] soc: imx: Add blk-ctl driver for i.MX8MM

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Date:   Tue, 4 May 2021 08:13:37 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc:     Rob Herring <robh+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Sascha Hauer <kernel@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Lucas Stach <l.stach@...gutronix.de>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Guido Günther <agx@...xcpu.org>,
        Marek Vasut <marex@...x.de>,
        Andrey Smirnov <andrew.smirnov@...il.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Ping Bai <ping.bai@....com>,
        Schrempf Frieder <frieder.schrempf@...tron.de>,
        Adam Ford <aford173@...il.com>, Abel Vesa <abel.vesa@....com>,
        Peng Fan <peng.fan@....com>
Subject: Re: [PATCH V2 4/4] soc: imx: Add blk-ctl driver for i.MX8MM

Hi Peng,

On Fri, Apr 30, 2021 at 1:56 AM Peng Fan (OSS) <peng.fan@....nxp.com> wrote:

> +static int imx8mm_blk_ctl_probe(struct platform_device *pdev)
> +{
> +       struct device *dev = &pdev->dev;
> +       const struct imx_blk_ctl_dev_data *dev_data = of_device_get_match_data(dev);
> +       struct regmap *regmap;
> +       struct resource *res;
> +       struct imx_blk_ctl *ctl;
> +       void __iomem *base;
> +
> +       ctl = devm_kzalloc(dev, sizeof(*ctl), GFP_KERNEL);
> +       if (!ctl)
> +               return -ENOMEM;
> +
> +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +       base = devm_ioremap_resource(dev, res);
> +       if (IS_ERR(base))
> +               return PTR_ERR(base);
> +
> +       regmap = devm_regmap_init_mmio(dev, base, &dev_data->config);
> +       if (IS_ERR(regmap))
> +               return PTR_ERR(regmap);
> +
> +       ctl->regmap = regmap;
> +       ctl->dev = dev;
> +       atomic_set(&ctl->power_count, 0);
> +
> +       ctl->num_clks = devm_clk_bulk_get_all(dev, &ctl->clks);
> +       if (ctl->num_clks < 0)
> +               return ctl->num_clks;
> +
> +       dev_set_drvdata(dev, ctl);
> +       ctl->dev_data = of_device_get_match_data(dev);

No need to call of_device_get_match_data() twice. You could do:

ctl->dev_data = dev_data;