Am Montag, den 11.02.2019, 17:51 -0800 schrieb Andrey Smirnov:
> PCIe IP block has additional clock, "pcie_aux", that needs to be
> controlled by the driver. Add code to support that.
>
> Signed-off-by: Andrey Smirnov <andrew.smir...@gmail.com>
> Cc: Bjorn Helgaas <bhelg...@google.com>
> Cc: Fabio Estevam <fabio.este...@nxp.com>
> Cc: Chris Healy <cphe...@gmail.com>
> Cc: Lucas Stach <l.st...@pengutronix.de>
> Cc: Leonard Crestez <leonard.cres...@nxp.com>
> Cc: "A.s. Dong" <aisheng.d...@nxp.com>
> Cc: Richard Zhu <hongxing....@nxp.com>
> Cc: linux-...@nxp.com
> Cc: linux-arm-ker...@lists.infradead.org
> Cc: linux-kernel@vger.kernel.org
> Cc: linux-...@vger.kernel.org
> Cc: Rob Herring <r...@kernel.org>
> Cc: devicet...@vger.kernel.org
Reviewed-by: Lucas Stach <l.st...@pengutronix.de>
> ---
> drivers/pci/controller/dwc/pci-imx6.c | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c
> b/drivers/pci/controller/dwc/pci-imx6.c
> index 7cdf8f9ab244..1a7031782846 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -65,6 +65,7 @@ struct imx6_pcie {
> struct clk *pcie_phy;
> struct clk *pcie_inbound_axi;
> struct clk *pcie;
> + struct clk *pcie_aux;
> struct regmap *iomuxc_gpr;
> u32 controller_id;
> struct reset_control *pciephy_reset;
> @@ -421,6 +422,12 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie
> *imx6_pcie)
> case IMX7D:
> break;
> case IMX8MQ:
> + ret = clk_prepare_enable(imx6_pcie->pcie_aux);
> + if (ret) {
> + dev_err(dev, "unable to enable pcie_aux clock\n");
> + break;
> + }
> +
> offset = imx6_pcie_grp_offset(imx6_pcie);
> /*
> * Set the over ride low and enabled
> @@ -904,6 +911,9 @@ static void imx6_pcie_clk_disable(struct imx6_pcie
> *imx6_pcie)
> 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;
> }
> @@ -1049,6 +1059,12 @@ static int imx6_pcie_probe(struct platform_device
> *pdev)
> dev_err(dev, "Failed to get PCIE APPS reset control\n");
> return PTR_ERR(imx6_pcie->apps_reset);
> }
> +
> + imx6_pcie->pcie_aux = devm_clk_get(dev, "pcie_aux");
> + if (IS_ERR(imx6_pcie->pcie_aux)) {
> + dev_err(dev, "pcie_aux clock source missing or
> invalid\n");
> + return PTR_ERR(imx6_pcie->pcie_aux);
> + }
> break;
> default:
> break;
