linux-kernel - Re: [PATCH v11 1/2] cpufreq: Add Kryo CPU scaling driver

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Date:   Thu, 24 May 2018 10:07:29 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Sudeep Holla <sudeep.holla@....com>
Cc:     Ilia Lin <ilialin@...eaurora.org>, vireshk@...nel.org, nm@...com,
        sboyd@...nel.org, robh@...nel.org, mark.rutland@....com,
        rjw@...ysocki.net, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v11 1/2] cpufreq: Add Kryo CPU scaling driver

On 23-05-18, 14:25, Sudeep Holla wrote:
> On 23/05/18 13:38, Ilia Lin wrote:
> > +static int __init qcom_cpufreq_kryo_init(void)
> > +{
> > +	/*
> > +	 * Since the driver depends on smem and nvmem drivers, which may
> > +	 * return EPROBE_DEFER, all the real activity is done in the probe,
> > +	 * which may be defered as well. The init here is only registering
> > +	 * a platform device.
> > +	 */
> > +	platform_device_register_simple("qcom-cpufreq-kryo", -1, NULL, 0);
> > +	return 0;
> > +}
> > +module_init(qcom_cpufreq_kryo_init);
> 
> Do you need this at all ? See below on how to eliminate the need for this.
> 
> > +
> > +static struct platform_driver qcom_cpufreq_kryo_driver = {
> > +	.probe = qcom_cpufreq_kryo_probe,
> > +	.driver = {
> > +		.name = "qcom-cpufreq-kryo",
> > +	},
> > +};
> > +builtin_platform_driver(qcom_cpufreq_kryo_driver);
> 
> Use builtin_platform_driver_probe and remove qcom_cpufreq_kryo_init
> or use module_platform_driver_probe if it can be module.

I agree with this, just use a single init routine to register both the driver
and device.

-- 
viresh