linux-kernel - Re: [PATCH v6 5/5] clk: meson: a1: add support for Amlogic A1 Peripheral clock driver

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Date:   Tue, 28 Jan 2020 21:42:52 -0800
From:   Stephen Boyd <sboyd@...nel.org>
To:     Jerome Brunet <jbrunet@...libre.com>,
        Jian Hu <jian.hu@...ogic.com>,
        Neil Armstrong <narmstrong@...libre.com>
Cc:     Jian Hu <jian.hu@...ogic.com>, Kevin Hilman <khilman@...libre.com>,
        Rob Herring <robh@...nel.org>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Michael Turquette <mturquette@...libre.com>,
        Qiufang Dai <qiufang.dai@...ogic.com>,
        Jianxin Pan <jianxin.pan@...ogic.com>,
        Victor Wan <victor.wan@...ogic.com>,
        Chandle Zou <chandle.zou@...ogic.com>,
        linux-clk@...r.kernel.org, linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 5/5] clk: meson: a1: add support for Amlogic A1 Peripheral clock driver

Quoting Jian Hu (2020-01-16 00:04:40)
> diff --git a/drivers/clk/meson/a1.c b/drivers/clk/meson/a1.c
> new file mode 100644
> index 000000000000..2cf20ae1db75
> --- /dev/null
> +++ b/drivers/clk/meson/a1.c
> @@ -0,0 +1,2249 @@
[...]
> +       &a1_ceca_32k_clkout,
> +       &a1_cecb_32k_clkin,
> +       &a1_cecb_32k_div,
> +       &a1_cecb_32k_sel_pre,
> +       &a1_cecb_32k_sel,
> +       &a1_cecb_32k_clkout,
> +};
> +
> +static struct regmap_config clkc_regmap_config = {

Can this be const?

> +       .reg_bits       = 32,
> +       .val_bits       = 32,
> +       .reg_stride     = 4,
> +};
> +
> +static int meson_a1_periphs_probe(struct platform_device *pdev)
> +{
> +       struct device *dev = &pdev->dev;
> +       struct resource *res;
> +       void __iomem *base;
> +       struct regmap *map;
> +       int ret, i;
> +
> +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +
> +       base = devm_ioremap_resource(dev, res);

Can you use the combination function that does the get resource and
ioremap in one function?

> +       if (IS_ERR(base))
> +               return PTR_ERR(base);
> +
> +       map = devm_regmap_init_mmio(dev, base, &clkc_regmap_config);
> +       if (IS_ERR(map))
> +               return PTR_ERR(map);
> +
> +       /* Populate regmap for the regmap backed clocks */

Seems like a useless comment.

> +       for (i = 0; i < ARRAY_SIZE(a1_periphs_regmaps); i++)
> +               a1_periphs_regmaps[i]->map = map;
> +