linux-kernel - Re: [PATCH v4 4/6] memory: mediatek: Add SMI driver

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Date:	Wed, 12 Aug 2015 20:39:34 +0800
From:	Yong Wu <yong.wu@...iatek.com>
To:	Joerg Roedel <joro@...tes.org>
CC:	Thierry Reding <treding@...dia.com>,
	Mark Rutland <mark.rutland@....com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	"Robin Murphy" <robin.murphy@....com>,
	Will Deacon <will.deacon@....com>,
	"Daniel Kurtz" <djkurtz@...gle.com>,
	Tomasz Figa <tfiga@...gle.com>,
	Lucas Stach <l.stach@...gutronix.de>,
	Rob Herring <robh+dt@...nel.org>,
	"Catalin Marinas" <catalin.marinas@....com>,
	<linux-mediatek@...ts.infradead.org>,
	Sasha Hauer <kernel@...gutronix.de>,
	<srv_heupstream@...iatek.com>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<iommu@...ts.linux-foundation.org>, <pebolle@...cali.nl>,
	<arnd@...db.de>, <mitchelh@...eaurora.org>,
	<youhua.li@...iatek.com>, <k.zhang@...iatek.com>,
	<frederic.chen@...iatek.com>
Subject: Re: [PATCH v4 4/6] memory: mediatek: Add SMI driver

On Tue, 2015-08-11 at 16:56 +0200, Joerg Roedel wrote:
> On Mon, Aug 03, 2015 at 06:21:17PM +0800, Yong Wu wrote:
> > +static int mtk_smi_common_get(struct device *smidev)
> > +{
> > +	struct mtk_smi_common *smipriv = dev_get_drvdata(smidev);
> > +	int ret;
> > +
> > +	ret = pm_runtime_get_sync(smidev);
> > +	if (ret < 0)
> > +		return ret;
> > +
> > +	ret = clk_prepare_enable(smipriv->clk_apb);
> > +	if (ret) {
> > +		dev_err(smidev, "Failed to enable the apb clock\n");
> > +		goto err_put_pm;
> > +	}
> > +	ret = clk_prepare_enable(smipriv->clk_smi);
> > +	if (ret) {
> > +		dev_err(smidev, "Failed to enable the smi clock\n");
> > +		goto err_disable_apb;
> > +	}
> > +	return ret;
> > +
> > +err_disable_apb:
> > +	clk_disable_unprepare(smipriv->clk_apb);
> > +err_put_pm:
> > +	pm_runtime_put(smidev);
> > +	return ret;
> > +}
> 
> [...]
> 
> > +int mtk_smi_larb_get(struct device *larbdev)
> > +{
> > +	struct mtk_smi_larb *larbpriv = dev_get_drvdata(larbdev);
> > +	struct mtk_larb_mmu *mmucfg = larbdev->archdata.iommu;
> > +	int ret;
> > +
> > +	ret = mtk_smi_common_get(larbpriv->smi);
> > +	if (ret)
> > +		return ret;
> > +
> > +	ret = pm_runtime_get_sync(larbdev);
> > +	if (ret < 0)
> > +		goto err_put_smicommon;
> > +
> > +	ret = clk_prepare_enable(larbpriv->clk_apb);
> > +	if (ret) {
> > +		dev_err(larbdev, "Failed to enable the apb clock\n");
> > +		goto err_put_pm;
> > +	}
> > +
> > +	ret = clk_prepare_enable(larbpriv->clk_smi);
> > +	if (ret) {
> > +		dev_err(larbdev, "Failed to enable the smi clock\n");
> > +		goto err_disable_apb;
> > +	}
> 
> The clock enablement looks similar to the function above, maybe move it
> to a helper function?

Thanks. I will improve it in next version.

> 
> 
> 	Joerg
> 


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