RE: [PATCH v3 9/9] PCI: imx: add the imx8mm pcie support

[Richard Zhu]

> -----Original Message-----
> From: Matthias Schiffer <matthias.schiffer@xxxxxxxxxxxxxxx>
> Sent: Wednesday, October 13, 2021 8:46 PM
> To: Richard Zhu <hongxing.zhu@xxxxxxx>
> Cc: linux-phy@xxxxxxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx;
> linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> kernel@xxxxxxxxxxxxxx; dl-linux-imx <linux-imx@xxxxxxx>;
> l.stach@xxxxxxxxxxxxxx; tharvey@xxxxxxxxxxxxx; kishon@xxxxxx;
> vkoul@xxxxxxxxxx; robh@xxxxxxxxxx; galak@xxxxxxxxxxxxxxxxxxx;
> shawnguo@xxxxxxxxxx
> Subject: Re: [PATCH v3 9/9] PCI: imx: add the imx8mm pcie support
> 
> On Tue, 2021-10-12 at 16:41 +0800, Richard Zhu wrote:
> > i.MX8MM PCIe works mostly like the i.MX8MQ one, but has a different
> > PHY and allows to output the internal PHY reference clock via the refclk
> pad.
> > Add the i.MX8MM PCIe support based on the standalone PHY driver.
> >
> > Signed-off-by: Richard Zhu <hongxing.zhu@xxxxxxx>
> > ---
> > [...]
> > @@ -1130,6 +1176,14 @@ static int imx6_pcie_probe(struct
> platform_device *pdev)
> >  				 &imx6_pcie->tx_swing_low))
> >  		imx6_pcie->tx_swing_low = 127;
> >
> > +	/* get PHY refclk pad mode if there is PHY node */
> > +	phy_node = of_parse_phandle(node, "phys", 0);
> > +	if (phy_node) {
> > +		of_property_read_u32(phy_node, "fsl,refclk-pad-mode",
> > +				     &imx6_pcie->refclk_pad_mode);
> 
> It seems to me that the refclk_pad_mode is not actually used by this driver
> anymore, because it is handled by the PHY driver now. Is there a reason to
> read this property here at all?
>
[Richard Zhu] Good caught. I forgot to clean up the refclk_pad_mode in controller driver.
Would remove these codes later. Thanks a lot.

Best Regards
Richard Zhu