linux-kernel - Re: [PATCH 5/5] clk: mediatek: Add USB clock support in MT8173 APMIXEDSYS

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Date:	Tue, 26 May 2015 11:41:40 +0200
From:	Sascha Hauer <s.hauer@...gutronix.de>
To:	James Liao <jamesjj.liao@...iatek.com>
Cc:	Matthias Brugger <matthias.bgg@...il.com>,
	Mike Turquette <mturquette@...aro.org>,
	Stephen Boyd <sboyd@...eaurora.org>,
	srv_heupstream@...iatek.com, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, Daniel Kurtz <djkurtz@...omium.org>,
	Ricky Liang <jcliang@...omium.org>,
	Rob Herring <robh+dt@...nel.org>,
	linux-mediatek@...ts.infradead.org,
	Henry Chen <henryc.chen@...iatek.com>,
	Sascha Hauer <kernel@...gutronix.de>,
	Yingjoe Chen <yingjoe.chen@...iatek.com>,
	Eddie Huang <eddie.huang@...iatek.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 5/5] clk: mediatek: Add USB clock support in MT8173
 APMIXEDSYS

On Tue, May 26, 2015 at 05:11:15PM +0800, James Liao wrote:
> Hi Sascha,
> 
> On Tue, 2015-05-26 at 10:05 +0200, Sascha Hauer wrote:
> > On Thu, May 21, 2015 at 03:12:56PM +0800, James Liao wrote:
> > > +static void __init mtk_clk_register_apmixedsys_special(struct device_node *node,
> > > +			struct clk_onecell_data *clk_data)
> > > +{
> > > +	void __iomem *base;
> > > +	struct clk *clk;
> > > +
> > > +	base = of_iomap(node, 0);
> > > +	if (!base) {
> > > +		pr_err("%s(): ioremap failed\n", __func__);
> > > +		return;
> > > +	}
> > > +
> > > +	clk = mtk_clk_register_ref2usb_tx("ref2usb_tx", base + 0x8);
> > 
> > The function seems to be for one special clock only. Why do you pass the
> > name to it? They will never be called with another name, right?
> 
> This function decides clock name and associates clock ID for special
> clocks. In fact there may be another "special clocks" need to add into
> apmixedsys. I think it's a better way to group clock names and clock IDs
> in the same function for maintenance.

How can a function with ref2usb_tx in its name ever register a clock
with another name? Then it seems the function name is wrong.

Sascha

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