linux-kernel - Re: [PATCH v4 2/5] clk: iproc: add initial common clock support

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Message-ID: <54D2AC47.8080201@broadcom.com>
Date:	Wed, 4 Feb 2015 15:33:27 -0800
From:	Ray Jui <rjui@...adcom.com>
To:	Stephen Boyd <sboyd@...eaurora.org>,
	Mike Turquette <mturquette@...aro.org>,
	Matt Porter <mporter@...aro.org>,
	Alex Elder <elder@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<devicetree@...r.kernel.org>,
	Scott Branden <sbranden@...adcom.com>,
	Dmitry Torokhov <dtor@...gle.com>,
	Anatol Pomazau <anatol@...gle.com>,
	<linux-kernel@...r.kernel.org>,
	<bcm-kernel-feedback-list@...adcom.com>
Subject: Re: [PATCH v4 2/5] clk: iproc: add initial common clock support



On 2/4/2015 3:13 PM, Stephen Boyd wrote:
> On 02/03/15 10:33, Ray Jui wrote:
>> +/*
>> + * Get the clock rate based on name
>> + */
>> +static unsigned long __get_rate(const char *clk_name)
>> +{
>> +	struct clk *clk;
>> +
>> +	clk = __clk_lookup(clk_name);
>> +	if (!clk) {
>> +		pr_err("%s: unable to find clock by name: %s\n", __func__,
>> +				clk_name);
>> +		return 0;
>> +	}
>> +
>> +	return clk_get_rate(clk);
>> +}
>> +
> 
> This looks like something we should be providing in the core framework.
> Care to make it into an of_clk_get_parent_rate() API?
> 

I would love to! Note __get_rate here is really getting the clock rate
with a name provided. Can you be more specific on what you want? If I'm
not mistaken, what you really want is this?

unsigned long of_clk_get_parent_rate(struct device_node *np, int index);

>> +extern void __init iproc_armpll_setup(struct device_node *node);
>> +extern void __init iproc_pll_setup(struct device_node *node,
>> +		const struct iproc_pll_ctrl *ctrl,
>> +		const struct iproc_pll_vco_freq_param *vco_param,
>> +		unsigned int num_freqs);
>> +extern void __init iproc_clk_setup(struct device_node *node,
>> +		const struct iproc_clk_ctrl *ctrl, unsigned int num_clks);
>> +extern void __init iproc_asiu_setup(struct device_node *node,
>> +		const struct iproc_asiu_div *div,
>> +		const struct iproc_asiu_gate *gate, unsigned int num_clks);
> 
> __init is not necessary in header files.
> 

Okay I'll remove __init. Thanks.

Ray
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