linux-kernel - Re: [RFC 2/2] PCI: imx6: Enable imx6qp pcie power management support

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Message-ID: <48735d86d0685a0c94e74481ed5fdf6fe66da8be.camel@pengutronix.de>
Date:   Wed, 09 Feb 2022 10:07:59 +0100
From:   Lucas Stach <l.stach@...gutronix.de>
To:     Richard Zhu <hongxing.zhu@....com>, bhelgaas@...gle.com,
        lorenzo.pieralisi@....com, shawnguo@...nel.org
Cc:     linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, kernel@...gutronix.de,
        linux-imx@....com
Subject: Re: [RFC 2/2] PCI: imx6: Enable imx6qp pcie power management support

s/pcie/PCIe/ and maybe s/imx6qp/i.MX6QP/ in the subject.

Am Mittwoch, dem 09.02.2022 um 15:02 +0800 schrieb Richard Zhu:
> i.MX6QP PCIe supports the RESET logic, thus it can support
> the L2 exit by the reset mechanism.
> Enable the i.MX6QP PCIe suspend/resume operations support.
> 
> Signed-off-by: Richard Zhu <hongxing.zhu@....com>

Other than the nitpick:
Reviewed-by: Lucas Stach <l.stach@...gutronix.de>
 
> ---
>  drivers/pci/controller/dwc/pci-imx6.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index 784801f2f9e6..62262483470a 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -995,6 +995,7 @@ static void imx6_pcie_pm_turnoff(struct imx6_pcie *imx6_pcie)
>  	/* Others poke directly at IOMUXC registers */
>  	switch (imx6_pcie->drvdata->variant) {
>  	case IMX6SX:
> +	case IMX6QP:
>  		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
>  				IMX6SX_GPR12_PCIE_PM_TURN_OFF,
>  				IMX6SX_GPR12_PCIE_PM_TURN_OFF);
> @@ -1307,7 +1308,8 @@ static const struct imx6_pcie_drvdata drvdata[] = {
>  	[IMX6QP] = {
>  		.variant = IMX6QP,
>  		.flags = IMX6_PCIE_FLAG_IMX6_PHY |
> -			 IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE,
> +			 IMX6_PCIE_FLAG_IMX6_SPEED_CHANGE |
> +			 IMX6_PCIE_FLAG_SUPPORTS_SUSPEND,
>  		.dbi_length = 0x200,
>  	},
>  	[IMX7D] = {