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Message-ID: <9b56df24-7906-f539-51ec-b9f8b785e020@amlogic.com>
Date: Sun, 8 Apr 2018 11:00:57 +0800
From: Yixun Lan <yixun.lan@...ogic.com>
To: Stephen Boyd <sboyd@...nel.org>, Carlo Caione <carlo@...one.org>,
Jerome Brunet <jbrunet@...libre.com>,
Kevin Hilman <khilman@...libre.com>,
Neil Armstrong <narmstrong@...libre.com>
CC: <yixun.lan@...ogic.com>, Rob Herring <robh@...nel.org>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...eaurora.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
Qiufang Dai <qiufang.dai@...ogic.com>,
<linux-amlogic@...ts.infradead.org>, <linux-clk@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 1/6] clk: meson: aoclk: refactor common code into
dedicated file
HI Stephen
thanks for the review
On 04/07/18 02:39, Stephen Boyd wrote:
> 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?
>
sure, I'll update at v4
>> + .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@...libre.com>
>> + *
>> + * Copyright (c) 2018 Amlogic, inc.
>> + * Author: Qiufang Dai <qiufang.dai@...ogic.com>
>> + * Author: Yixun Lan <yixun.lan@...ogic.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.
>
will do, thanks for pointing out this
>> +
>> + /*
>> + * 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?
>
sure
> 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.
>
I think it's a good idea to fix this in another independent patch
also I will address the comments you raised in another mail thread
Yixun
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