linux-kernel - Re: [PATCH v2 2/3] PCI: imx: No-op imx6_pcie_reset

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Date:   Thu, 06 Dec 2018 10:41:53 +0100
From:   Lucas Stach <l.stach@...gutronix.de>
To:     Andrey Smirnov <andrew.smirnov@...il.com>,
        linux-pci@...r.kernel.org
Cc:     bhelgaas@...gle.com, Fabio Estevam <fabio.estevam@....com>,
        cphealy@...il.com, Leonard Crestez <leonard.crestez@....com>,
        "A.s. Dong" <aisheng.dong@....com>,
        Richard Zhu <hongxing.zhu@....com>, linux-imx@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] PCI: imx: No-op imx6_pcie_reset_phy() on i.MX7D

Am Mittwoch, den 05.12.2018, 23:35 -0800 schrieb Andrey Smirnov:
> PCIE PHY IP block on i.MX7D differs from the one used on i.MX6 family,
> so none of the code in current implementation of imx6_pcie_reset_phy()
> is applicable.
> 
> Cc: bhelgaas@...gle.com
> > Cc: Fabio Estevam <fabio.estevam@....com>
> Cc: cphealy@...il.com
> Cc: l.stach@...gutronix.de
> > Cc: Leonard Crestez <leonard.crestez@....com>
> > Cc: "A.s. Dong" <aisheng.dong@....com>
> > Cc: Richard Zhu <hongxing.zhu@....com>
> Cc: linux-imx@....com
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-kernel@...r.kernel.org
> Cc: linux-pci@...r.kernel.org
> > Tested-by: Trent Piepho <tpiepho@...inj.com>
> Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>

Reviewed-by: Lucas Stach <l.stach@...gutronix.de>

> ---
>  drivers/pci/controller/dwc/pci-imx6.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index c140f7987598..3c3002861d25 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -245,6 +245,9 @@ static void imx6_pcie_reset_phy(struct imx6_pcie *imx6_pcie)
>  {
> >  	u32 tmp;
>  
> > +	if (imx6_pcie->variant == IMX7D)
> > +		return;
> +
> >  	pcie_phy_read(imx6_pcie, PHY_RX_OVRD_IN_LO, &tmp);
> >  	tmp |= (PHY_RX_OVRD_IN_LO_RX_DATA_EN |
> >  		PHY_RX_OVRD_IN_LO_RX_PLL_EN);