RE: [PATCH v6 3/8] PCI: imx6: Move imx6_pcie_clk_disable() earlier

[Hongxing Zhu <hongxing.zhu@nxp.com>]

> -----Original Message-----
> From: Francesco Dolcini <francesco.dolcini@toradex.com>
> Sent: 2022年2月12日 0:30
> To: Hongxing Zhu <hongxing.zhu@nxp.com>
> Cc: l.stach@pengutronix.de; bhelgaas@google.com; broonie@kernel.org;
> lorenzo.pieralisi@arm.com; jingoohan1@gmail.com; festevam@gmail.com;
> linux-pci@vger.kernel.org; dl-linux-imx <linux-imx@nxp.com>;
> linux-arm-kernel@lists.infradead.org; linux-kernel@vger.kernel.org;
> kernel@pengutronix.de
> Subject: Re: [PATCH v6 3/8] PCI: imx6: Move imx6_pcie_clk_disable() earlier
> 
> Hello Richard,
> 
> On Tue, Feb 08, 2022 at 11:25:30AM +0800, Richard Zhu wrote:
> > Just move the imx6_pcie_clk_disable() to an earlier place without
> > function changes, since it wouldn't be only used in
> imx6_pcie_suspend_noirq() later.
> 
> In which patch are you going to use imx6_pcie_clk_disable()? I could not see it
> in this patch series.
Hi Francesco:
Thanks for your review.
The imx6_pcie_clk_disable() would be invoked in imx6_pcie_host_exit() in #7
 patch later.

Best Regards
Richard Zhu

> 
> Francesco
> 
> >
> > Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
> > ---
> >  drivers/pci/controller/dwc/pci-imx6.c | 47
> > +++++++++++++--------------
> >  1 file changed, 23 insertions(+), 24 deletions(-)
> >
> > diff --git a/drivers/pci/controller/dwc/pci-imx6.c
> > b/drivers/pci/controller/dwc/pci-imx6.c
> > index 3ca2eef39617..e157f0bec37e 100644
> > --- a/drivers/pci/controller/dwc/pci-imx6.c
> > +++ b/drivers/pci/controller/dwc/pci-imx6.c
> > @@ -533,6 +533,29 @@ static int imx6_pcie_clk_enable(struct imx6_pcie
> *imx6_pcie)
> >  	return ret;
> >  }
> >
> > +static void imx6_pcie_clk_disable(struct imx6_pcie *imx6_pcie) {
> > +	clk_disable_unprepare(imx6_pcie->pcie);
> > +	clk_disable_unprepare(imx6_pcie->pcie_phy);
> > +	clk_disable_unprepare(imx6_pcie->pcie_bus);
> > +
> > +	switch (imx6_pcie->drvdata->variant) {
> > +	case IMX6SX:
> > +		clk_disable_unprepare(imx6_pcie->pcie_inbound_axi);
> > +		break;
> > +	case IMX7D:
> > +		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
> > +				   IMX7D_GPR12_PCIE_PHY_REFCLK_SEL,
> > +				   IMX7D_GPR12_PCIE_PHY_REFCLK_SEL);
> > +		break;
> > +	case IMX8MQ:
> > +		clk_disable_unprepare(imx6_pcie->pcie_aux);
> > +		break;
> > +	default:
> > +		break;
> > +	}
> > +}
> > +
> >  static void imx7d_pcie_wait_for_phy_pll_lock(struct imx6_pcie
> > *imx6_pcie)  {
> >  	u32 val;
> > @@ -965,30 +988,6 @@ static void imx6_pcie_pm_turnoff(struct imx6_pcie
> *imx6_pcie)
> >  	usleep_range(1000, 10000);
> >  }
> >
> > -static void imx6_pcie_clk_disable(struct imx6_pcie *imx6_pcie) -{
> > -	clk_disable_unprepare(imx6_pcie->pcie);
> > -	clk_disable_unprepare(imx6_pcie->pcie_phy);
> > -	clk_disable_unprepare(imx6_pcie->pcie_bus);
> > -
> > -	switch (imx6_pcie->drvdata->variant) {
> > -	case IMX6SX:
> > -		clk_disable_unprepare(imx6_pcie->pcie_inbound_axi);
> > -		break;
> > -	case IMX7D:
> > -		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
> > -				   IMX7D_GPR12_PCIE_PHY_REFCLK_SEL,
> > -				   IMX7D_GPR12_PCIE_PHY_REFCLK_SEL);
> > -		break;
> > -	case IMX8MQ:
> > -	case IMX8MM:
> > -		clk_disable_unprepare(imx6_pcie->pcie_aux);
> > -		break;
> > -	default:
> > -		break;
> > -	}
> > -}
> > -
> >  static int imx6_pcie_suspend_noirq(struct device *dev)  {
> >  	struct imx6_pcie *imx6_pcie = dev_get_drvdata(dev);
> > --
> > 2.25.1
> >