linux-kernel - Re: [PATCH v2 01/19] clk: meson: introduce meson-clkc-utils

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Date:   Mon, 17 Jul 2023 14:21:55 +0200
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Jerome Brunet <jbrunet@...libre.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Kevin Hilman <khilman@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc:     linux-amlogic@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v2 01/19] clk: meson: introduce meson-clkc-utils

On 12/07/2023 14:03, Jerome Brunet wrote:
> 
> On Mon 12 Jun 2023 at 11:57, Neil Armstrong <neil.armstrong@...aro.org> wrote:
> 
>> Let's introduce a new module called meson-clkc-utils that
>> will contain shared utility functions for all Amlogic clock
>> controller drivers.
>>
>> The first utility function is a replacement of of_clk_hw_onecell_get
>> in order to get rid of the NR_CLKS define in all Amlogic clock
>> drivers.
>>
>> The goal is to move all duplicate probe and init code in this module.
>>
>> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
> 
> Hi Neil,
> 
> checkpatch complains about the MODULE_LICENSE()
> 
> WARNING: Prefer "GPL" over "GPL v2" - see commit bf7fbeeae6db ("module: Cure the MODULE_LICENSE "GPL" vs. "GPL v2" bogosity")
> #185: FILE: drivers/clk/meson/meson-clkc-utils.c:25:
> +MODULE_LICENSE("GPL v2");

Damn, sorry for that

> 
> I don't mind fixing this up while applying if it is Ok with you.
> 

Yes please, I'm OoO and won't be able to send a v3 soonish.

Thanks,
Neil

>> ---
>>   drivers/clk/meson/Kconfig            |  3 +++
>>   drivers/clk/meson/Makefile           |  1 +
>>   drivers/clk/meson/meson-clkc-utils.c | 25 +++++++++++++++++++++++++
>>   drivers/clk/meson/meson-clkc-utils.h | 19 +++++++++++++++++++
>>   4 files changed, 48 insertions(+)
>>
>> diff --git a/drivers/clk/meson/Kconfig b/drivers/clk/meson/Kconfig
>> index 8ce846fdbe43..d03adad31318 100644
>> --- a/drivers/clk/meson/Kconfig
>> +++ b/drivers/clk/meson/Kconfig
>> @@ -30,6 +30,9 @@ config COMMON_CLK_MESON_VID_PLL_DIV
>>   	tristate
>>   	select COMMON_CLK_MESON_REGMAP
>>   
>> +config COMMON_CLK_MESON_CLKC_UTILS
>> +	tristate
>> +
>>   config COMMON_CLK_MESON_AO_CLKC
>>   	tristate
>>   	select COMMON_CLK_MESON_REGMAP
>> diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile
>> index d5288662881d..cd961cc4f4db 100644
>> --- a/drivers/clk/meson/Makefile
>> +++ b/drivers/clk/meson/Makefile
>> @@ -1,6 +1,7 @@
>>   # SPDX-License-Identifier: GPL-2.0-only
>>   # Amlogic clock drivers
>>   
>> +obj-$(CONFIG_COMMON_CLK_MESON_CLKC_UTILS) += meson-clkc-utils.o
>>   obj-$(CONFIG_COMMON_CLK_MESON_AO_CLKC) += meson-aoclk.o
>>   obj-$(CONFIG_COMMON_CLK_MESON_CPU_DYNDIV) += clk-cpu-dyndiv.o
>>   obj-$(CONFIG_COMMON_CLK_MESON_DUALDIV) += clk-dualdiv.o
>> diff --git a/drivers/clk/meson/meson-clkc-utils.c b/drivers/clk/meson/meson-clkc-utils.c
>> new file mode 100644
>> index 000000000000..9a0620bcc161
>> --- /dev/null
>> +++ b/drivers/clk/meson/meson-clkc-utils.c
>> @@ -0,0 +1,25 @@
>> +// SPDX-License-Identifier: GPL-2.0+
>> +/*
>> + * Copyright (c) 2023 Neil Armstrong <neil.armstrong@...aro.org>
>> + */
>> +
>> +#include <linux/of_device.h>
>> +#include <linux/clk-provider.h>
>> +#include <linux/module.h>
>> +#include "meson-clkc-utils.h"
>> +
>> +struct clk_hw *meson_clk_hw_get(struct of_phandle_args *clkspec, void *clk_hw_data)
>> +{
>> +	const struct meson_clk_hw_data *data = clk_hw_data;
>> +	unsigned int idx = clkspec->args[0];
>> +
>> +	if (idx >= data->num) {
>> +		pr_err("%s: invalid index %u\n", __func__, idx);
>> +		return ERR_PTR(-EINVAL);
>> +	}
>> +
>> +	return data->hws[idx];
>> +}
>> +EXPORT_SYMBOL_GPL(meson_clk_hw_get);
>> +
>> +MODULE_LICENSE("GPL v2");
>> diff --git a/drivers/clk/meson/meson-clkc-utils.h b/drivers/clk/meson/meson-clkc-utils.h
>> new file mode 100644
>> index 000000000000..fe6f40728949
>> --- /dev/null
>> +++ b/drivers/clk/meson/meson-clkc-utils.h
>> @@ -0,0 +1,19 @@
>> +/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
>> +/*
>> + * Copyright (c) 2023 Neil Armstrong <neil.armstrong@...aro.org>
>> + */
>> +
>> +#ifndef __MESON_CLKC_UTILS_H__
>> +#define __MESON_CLKC_UTILS_H__
>> +
>> +#include <linux/of_device.h>
>> +#include <linux/clk-provider.h>
>> +
>> +struct meson_clk_hw_data {
>> +	struct clk_hw	**hws;
>> +	unsigned int	num;
>> +};
>> +
>> +struct clk_hw *meson_clk_hw_get(struct of_phandle_args *clkspec, void *clk_hw_data);
>> +
>> +#endif
>