From: Andrey Smirnov <andrew.smirnov@gmail.com> To: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: "A.s. Dong" <aisheng.dong@nxp.com>, Rob Herring <robh@kernel.org>, Richard Zhu <hongxing.zhu@nxp.com>, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, Andrey Smirnov <andrew.smirnov@gmail.com>, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Fabio Estevam <fabio.estevam@nxp.com>, linux-imx@nxp.com, Bjorn Helgaas <bhelgaas@google.com>, Leonard Crestez <leonard.crestez@nxp.com>, Chris Healy <cphealy@gmail.com>, Lucas Stach <l.stach@pengutronix.de> Subject: [PATCH 2/2] PCI: imx6: Add code to request/control "pcie_aux" clock for i.MX8MQ Date: Mon, 11 Feb 2019 17:51:08 -0800 Message-ID: <20190212015108.16952-3-andrew.smirnov@gmail.com> (raw) In-Reply-To: <20190212015108.16952-1-andrew.smirnov@gmail.com> 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.smirnov@gmail.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Fabio Estevam <fabio.estevam@nxp.com> Cc: Chris Healy <cphealy@gmail.com> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Leonard Crestez <leonard.crestez@nxp.com> Cc: "A.s. Dong" <aisheng.dong@nxp.com> Cc: Richard Zhu <hongxing.zhu@nxp.com> Cc: linux-imx@nxp.com Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: linux-pci@vger.kernel.org Cc: Rob Herring <robh@kernel.org> Cc: devicetree@vger.kernel.org --- 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; -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply index Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-02-12 1:51 [PATCH 0/2] " Andrey Smirnov 2019-02-12 1:51 ` [PATCH 1/2] dt-bindings: imx6q-pcie: Add "pcie_aux" clock for imx8mq Andrey Smirnov 2019-02-12 8:57 ` Lucas Stach 2019-02-25 23:39 ` Rob Herring 2019-02-12 1:51 ` Andrey Smirnov [this message] 2019-02-12 9:36 ` [PATCH 2/2] PCI: imx6: Add code to request/control "pcie_aux" clock for i.MX8MQ Lucas Stach 2019-02-28 21:23 ` Trent Piepho 2019-03-01 1:16 ` Andrey Smirnov 2019-02-19 12:42 ` [PATCH 0/2] " Lorenzo Pieralisi 2019-02-19 12:46 ` Lucas Stach
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