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SubjectRe: [PATCH v3 1/6] clk: meson: aoclk: refactor common code into dedicated file
Date
Quoting Yixun Lan (2018-03-27 19:50:45)
> diff --git a/drivers/clk/meson/gxbb-aoclk.c b/drivers/clk/meson/gxbb-aoclk.c
> index 9ec23ae9a219..5a922639a264 100644
> --- a/drivers/clk/meson/gxbb-aoclk.c
> +++ b/drivers/clk/meson/gxbb-aoclk.c
> @@ -165,38 +135,39 @@ static int gxbb_aoclkc_probe(struct platform_device *pdev)
> return -ENODEV;
> }
>
> - /* Reset Controller */
> - rstc->regmap = regmap;
> - rstc->data = gxbb_aoclk_reset;
> - rstc->reset.ops = &gxbb_aoclk_reset_ops;
> - rstc->reset.nr_resets = ARRAY_SIZE(gxbb_aoclk_reset);
> - rstc->reset.of_node = dev->of_node;
> - ret = devm_reset_controller_register(dev, &rstc->reset);
> -
> - /*
> - * Populate regmap and register all clks
> - */
> - for (clkid = 0; clkid < ARRAY_SIZE(gxbb_aoclk_gate); clkid++) {
> - gxbb_aoclk_gate[clkid]->map = regmap;
> -
> - ret = devm_clk_hw_register(dev,
> - gxbb_aoclk_onecell_data.hws[clkid]);
> - if (ret)
> - return ret;
> - }
> -
> /* Specific clocks */
> cec_32k_ao.regmap = regmap;
> ret = devm_clk_hw_register(dev, &cec_32k_ao.hw);
> - if (ret)
> + if (ret) {
> + dev_err(&pdev->dev, "clk cec_32k_ao register failed.\n");
> return ret;
> + }
> +
> + return 0;
> +}
> +
> +static struct meson_aoclk_data gxbb_aoclkc_data = {

Can this be const?

> + .reset_reg = AO_RTI_GEN_CNTL_REG0,
> + .num_reset = ARRAY_SIZE(gxbb_aoclk_reset),
> + .reset = gxbb_aoclk_reset,
> + .num_clks = ARRAY_SIZE(gxbb_aoclk_gate),
> + .clks = gxbb_aoclk_gate,
> + .hw_data = &gxbb_aoclk_onecell_data,
> +};
> +
> diff --git a/drivers/clk/meson/meson-aoclk.c b/drivers/clk/meson/meson-aoclk.c
> new file mode 100644
> index 000000000000..36067c801f7b
> --- /dev/null
> +++ b/drivers/clk/meson/meson-aoclk.c
> @@ -0,0 +1,79 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Amlogic Meson-AXG Clock Controller Driver
> + *
> + * Copyright (c) 2016 BayLibre, SAS.
> + * Author: Neil Armstrong <narmstrong@baylibre.com>
> + *
> + * Copyright (c) 2018 Amlogic, inc.
> + * Author: Qiufang Dai <qiufang.dai@amlogic.com>
> + * Author: Yixun Lan <yixun.lan@amlogic.com>
> + */
> +
> +#include <linux/platform_device.h>
> +#include <linux/reset-controller.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/init.h>
> +#include <linux/of_device.h>
> +#include "clk-regmap.h"
> +#include "meson-aoclk.h"
> +
> +static int meson_aoclk_do_reset(struct reset_controller_dev *rcdev,
> + unsigned long id)
> +{
> + struct meson_aoclk_reset_controller *rstc =
> + container_of(rcdev, struct meson_aoclk_reset_controller, reset);
> +
> + return regmap_write(rstc->regmap, rstc->data->reset_reg,
> + BIT(rstc->data->reset[id]));
> +}
> +
> +static const struct reset_control_ops meson_aoclk_reset_ops = {
> + .reset = meson_aoclk_do_reset,
> +};
> +
> +int meson_aoclkc_probe(struct platform_device *pdev)
> +{
> + struct meson_aoclk_reset_controller *rstc;
> + struct meson_aoclk_data *data;
> + struct device *dev = &pdev->dev;
> + struct regmap *regmap;
> + int ret, clkid;
> +
> + data = (struct meson_aoclk_data *)
> + of_device_get_match_data(dev);
> + if (!data)
> + return -ENODEV;
> +
> + rstc = devm_kzalloc(dev, sizeof(*rstc), GFP_KERNEL);
> + if (!rstc)
> + return -ENOMEM;
> +
> + regmap = syscon_node_to_regmap(of_get_parent(dev->of_node));
> + if (IS_ERR(regmap)) {
> + dev_err(dev, "failed to get regmap\n");
> + return -ENODEV;
> + }
> +
> + /* Reset Controller */
> + rstc->data = data;
> + rstc->regmap = regmap;
> + rstc->reset.ops = &meson_aoclk_reset_ops;
> + rstc->reset.nr_resets = data->num_reset,
> + rstc->reset.of_node = dev->of_node;
> + ret = devm_reset_controller_register(dev, &rstc->reset);

Please check the return value here.

> +
> + /*
> + * Populate regmap and register all clks
> + */
> + for (clkid = 0; clkid < data->num_clks; clkid++) {
> + data->clks[clkid]->map = regmap;
> +
> + ret = devm_clk_hw_register(dev, data->hw_data->hws[clkid]);
> + if (ret)
> + return ret;
> + }
> +
> + return of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get,
> + data->hw_data);

Use devm_ variant?

I suppose because code is moving in this patch that it would be better
to make improvements in another patch so that this patch is a pure code
movement change instead of a movement + improvement change.

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