Re: [PATCH 3/4] soc: mediatek: mmsys: Create struct mtk_mmsys to store context data

[Chun-Kuang Hu]

Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx> 於 2020年10月7日 週三 上午3:33寫道：
>
> From: CK Hu <ck.hu@xxxxxxxxxxxx>
>
> Apart from the driver data, in order to extend the driver to support more
> and more SoCs, we will need to store other configuration data. So, create
> a mtk_mmsys struct to encapsulate all that information.

Reviewed-by: Chun-Kuang Hu <chunkuang.hu@xxxxxxxxxxxx>

>
> Signed-off-by: CK Hu <ck.hu@xxxxxxxxxxxx>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
> ---
>
>  drivers/soc/mediatek/mtk-mmsys.c | 47 ++++++++++++++++++--------------
>  1 file changed, 27 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/soc/mediatek/mtk-mmsys.c b/drivers/soc/mediatek/mtk-mmsys.c
> index 18f93979e14a..da2de8f6969e 100644
> --- a/drivers/soc/mediatek/mtk-mmsys.c
> +++ b/drivers/soc/mediatek/mtk-mmsys.c
> @@ -101,6 +101,11 @@ static const struct mtk_mmsys_driver_data mt8183_mmsys_driver_data = {
>         .clk_driver = "clk-mt8183-mm",
>  };
>
> +struct mtk_mmsys {
> +       void __iomem *regs;
> +       const struct mtk_mmsys_driver_data *data;
> +};
> +
>  static unsigned int mtk_mmsys_ddp_mout_en(enum mtk_ddp_comp_id cur,
>                                           enum mtk_ddp_comp_id next,
>                                           unsigned int *addr)
> @@ -259,21 +264,21 @@ void mtk_mmsys_ddp_connect(struct device *dev,
>                            enum mtk_ddp_comp_id cur,
>                            enum mtk_ddp_comp_id next)
>  {
> -       void __iomem *config_regs = dev_get_drvdata(dev);
> +       struct mtk_mmsys *mmsys = dev_get_drvdata(dev);
>         unsigned int addr, value, reg;
>
>         value = mtk_mmsys_ddp_mout_en(cur, next, &addr);
>         if (value) {
> -               reg = readl_relaxed(config_regs + addr) | value;
> -               writel_relaxed(reg, config_regs + addr);
> +               reg = readl_relaxed(mmsys->regs + addr) | value;
> +               writel_relaxed(reg, mmsys->regs + addr);
>         }
>
> -       mtk_mmsys_ddp_sout_sel(config_regs, cur, next);
> +       mtk_mmsys_ddp_sout_sel(mmsys->regs, cur, next);
>
>         value = mtk_mmsys_ddp_sel_in(cur, next, &addr);
>         if (value) {
> -               reg = readl_relaxed(config_regs + addr) | value;
> -               writel_relaxed(reg, config_regs + addr);
> +               reg = readl_relaxed(mmsys->regs + addr) | value;
> +               writel_relaxed(reg, mmsys->regs + addr);
>         }
>  }
>  EXPORT_SYMBOL_GPL(mtk_mmsys_ddp_connect);
> @@ -282,44 +287,46 @@ void mtk_mmsys_ddp_disconnect(struct device *dev,
>                               enum mtk_ddp_comp_id cur,
>                               enum mtk_ddp_comp_id next)
>  {
> -       void __iomem *config_regs = dev_get_drvdata(dev);
> +       struct mtk_mmsys *mmsys = dev_get_drvdata(dev);
>         unsigned int addr, value, reg;
>
>         value = mtk_mmsys_ddp_mout_en(cur, next, &addr);
>         if (value) {
> -               reg = readl_relaxed(config_regs + addr) & ~value;
> -               writel_relaxed(reg, config_regs + addr);
> +               reg = readl_relaxed(mmsys->regs + addr) & ~value;
> +               writel_relaxed(reg, mmsys->regs + addr);
>         }
>
>         value = mtk_mmsys_ddp_sel_in(cur, next, &addr);
>         if (value) {
> -               reg = readl_relaxed(config_regs + addr) & ~value;
> -               writel_relaxed(reg, config_regs + addr);
> +               reg = readl_relaxed(mmsys->regs + addr) & ~value;
> +               writel_relaxed(reg, mmsys->regs + addr);
>         }
>  }
>  EXPORT_SYMBOL_GPL(mtk_mmsys_ddp_disconnect);
>
>  static int mtk_mmsys_probe(struct platform_device *pdev)
>  {
> -       const struct mtk_mmsys_driver_data *data;
>         struct device *dev = &pdev->dev;
>         struct platform_device *clks;
>         struct platform_device *drm;
> -       void __iomem *config_regs;
> +       struct mtk_mmsys *mmsys;
>         int ret;
>
> -       config_regs = devm_platform_ioremap_resource(pdev, 0);
> -       if (IS_ERR(config_regs)) {
> -               ret = PTR_ERR(config_regs);
> +       mmsys = devm_kzalloc(dev, sizeof(*mmsys), GFP_KERNEL);
> +       if (!mmsys)
> +               return -ENOMEM;
> +
> +       mmsys->regs = devm_platform_ioremap_resource(pdev, 0);
> +       if (IS_ERR(mmsys->regs)) {
> +               ret = PTR_ERR(mmsys->regs);
>                 dev_err(dev, "Failed to ioremap mmsys registers: %d\n", ret);
>                 return ret;
>         }
>
> -       platform_set_drvdata(pdev, config_regs);
> -
> -       data = of_device_get_match_data(&pdev->dev);
> +       mmsys->data = of_device_get_match_data(&pdev->dev);
> +       platform_set_drvdata(pdev, mmsys);
>
> -       clks = platform_device_register_data(&pdev->dev, data->clk_driver,
> +       clks = platform_device_register_data(&pdev->dev, mmsys->data->clk_driver,
>                                              PLATFORM_DEVID_AUTO, NULL, 0);
>         if (IS_ERR(clks))
>                 return PTR_ERR(clks);
> --
> 2.28.0
>