From: Kishon Vijay Abraham I <kishon@ti.com> To: Bjorn Helgaas <bhelgaas@google.com>, Rob Herring <robh+dt@kernel.org>, Tom Joseph <tjoseph@cadence.com>, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Kishon Vijay Abraham I <kishon@ti.com>, Nadeem Athani <nadeem@cadence.com> Cc: <linux-pci@vger.kernel.org>, <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-omap@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org> Subject: [PATCH v2 4/4] PCI: j721e: Add support to provide refclk to PCIe connector Date: Mon, 4 Jan 2021 18:11:03 +0530 [thread overview] Message-ID: <20210104124103.30930-5-kishon@ti.com> (raw) In-Reply-To: <20210104124103.30930-1-kishon@ti.com> Add support to provide refclk to PCIe connector. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> --- drivers/pci/controller/cadence/pci-j721e.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c index dac1ac8a7615..2e73729c7388 100644 --- a/drivers/pci/controller/cadence/pci-j721e.c +++ b/drivers/pci/controller/cadence/pci-j721e.c @@ -6,6 +6,7 @@ * Author: Kishon Vijay Abraham I <kishon@ti.com> */ +#include <linux/clk.h> #include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/io.h> @@ -50,6 +51,7 @@ enum link_status { struct j721e_pcie { struct device *dev; + struct clk *refclk; u32 mode; u32 num_lanes; struct cdns_pcie *cdns_pcie; @@ -310,6 +312,7 @@ static int j721e_pcie_probe(struct platform_device *pdev) struct cdns_pcie_ep *ep; struct gpio_desc *gpiod; void __iomem *base; + struct clk *clk; u32 num_lanes; u32 mode; int ret; @@ -408,6 +411,20 @@ static int j721e_pcie_probe(struct platform_device *pdev) goto err_get_sync; } + clk = devm_clk_get_optional(dev, "pcie_refclk"); + if (IS_ERR(clk)) { + dev_err(dev, "failed to get pcie_refclk\n"); + ret = PTR_ERR(clk); + goto err_pcie_setup; + } + + ret = clk_prepare_enable(clk); + if (ret) { + dev_err(dev, "failed to enable pcie_refclk\n"); + goto err_get_sync; + } + pcie->refclk = clk; + /* * "Power Sequencing and Reset Signal Timings" table in * PCI EXPRESS CARD ELECTROMECHANICAL SPECIFICATION, REV. 3.0 @@ -476,6 +493,7 @@ static int j721e_pcie_remove(struct platform_device *pdev) struct cdns_pcie *cdns_pcie = pcie->cdns_pcie; struct device *dev = &pdev->dev; + clk_disable_unprepare(pcie->refclk); cdns_pcie_disable_phy(cdns_pcie); pm_runtime_put(dev); pm_runtime_disable(dev); -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Kishon Vijay Abraham I <kishon@ti.com> To: Bjorn Helgaas <bhelgaas@google.com>, Rob Herring <robh+dt@kernel.org>, Tom Joseph <tjoseph@cadence.com>, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Kishon Vijay Abraham I <kishon@ti.com>, Nadeem Athani <nadeem@cadence.com> Cc: linux-pci@vger.kernel.org, linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org Subject: [PATCH v2 4/4] PCI: j721e: Add support to provide refclk to PCIe connector Date: Mon, 4 Jan 2021 18:11:03 +0530 [thread overview] Message-ID: <20210104124103.30930-5-kishon@ti.com> (raw) In-Reply-To: <20210104124103.30930-1-kishon@ti.com> Add support to provide refclk to PCIe connector. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> --- drivers/pci/controller/cadence/pci-j721e.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c index dac1ac8a7615..2e73729c7388 100644 --- a/drivers/pci/controller/cadence/pci-j721e.c +++ b/drivers/pci/controller/cadence/pci-j721e.c @@ -6,6 +6,7 @@ * Author: Kishon Vijay Abraham I <kishon@ti.com> */ +#include <linux/clk.h> #include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/io.h> @@ -50,6 +51,7 @@ enum link_status { struct j721e_pcie { struct device *dev; + struct clk *refclk; u32 mode; u32 num_lanes; struct cdns_pcie *cdns_pcie; @@ -310,6 +312,7 @@ static int j721e_pcie_probe(struct platform_device *pdev) struct cdns_pcie_ep *ep; struct gpio_desc *gpiod; void __iomem *base; + struct clk *clk; u32 num_lanes; u32 mode; int ret; @@ -408,6 +411,20 @@ static int j721e_pcie_probe(struct platform_device *pdev) goto err_get_sync; } + clk = devm_clk_get_optional(dev, "pcie_refclk"); + if (IS_ERR(clk)) { + dev_err(dev, "failed to get pcie_refclk\n"); + ret = PTR_ERR(clk); + goto err_pcie_setup; + } + + ret = clk_prepare_enable(clk); + if (ret) { + dev_err(dev, "failed to enable pcie_refclk\n"); + goto err_get_sync; + } + pcie->refclk = clk; + /* * "Power Sequencing and Reset Signal Timings" table in * PCI EXPRESS CARD ELECTROMECHANICAL SPECIFICATION, REV. 3.0 @@ -476,6 +493,7 @@ static int j721e_pcie_remove(struct platform_device *pdev) struct cdns_pcie *cdns_pcie = pcie->cdns_pcie; struct device *dev = &pdev->dev; + clk_disable_unprepare(pcie->refclk); cdns_pcie_disable_phy(cdns_pcie); pm_runtime_put(dev); pm_runtime_disable(dev); -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-01-04 12:43 UTC|newest] Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-01-04 12:40 [PATCH v2 0/4] AM64: Add PCIe bindings and driver support Kishon Vijay Abraham I 2021-01-04 12:40 ` Kishon Vijay Abraham I 2021-01-04 12:41 ` [PATCH v2 1/4] dt-bindings: PCI: ti,j721e: Add binding to represent refclk to the connector Kishon Vijay Abraham I 2021-01-04 12:41 ` [PATCH v2 1/4] dt-bindings: PCI: ti, j721e: " Kishon Vijay Abraham I 2021-01-11 22:31 ` [PATCH v2 1/4] dt-bindings: PCI: ti,j721e: " Rob Herring 2021-01-11 22:31 ` Rob Herring 2021-01-04 12:41 ` [PATCH v2 2/4] dt-bindings: pci: ti,j721e: Add host mode dt-bindings for TI's AM64 SoC Kishon Vijay Abraham I 2021-01-04 12:41 ` [PATCH v2 2/4] dt-bindings: pci: ti, j721e: " Kishon Vijay Abraham I 2021-01-11 22:37 ` [PATCH v2 2/4] dt-bindings: pci: ti,j721e: " Rob Herring 2021-01-11 22:37 ` Rob Herring 2021-01-04 12:41 ` [PATCH v2 3/4] dt-bindings: pci: ti,j721e: Add endpoint " Kishon Vijay Abraham I 2021-01-04 12:41 ` [PATCH v2 3/4] dt-bindings: pci: ti, j721e: " Kishon Vijay Abraham I 2021-01-04 12:41 ` Kishon Vijay Abraham I [this message] 2021-01-04 12:41 ` [PATCH v2 4/4] PCI: j721e: Add support to provide refclk to PCIe connector Kishon Vijay Abraham I
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