| Message ID | 20201224115658.2795-5-kishon@ti.com |
|---|---|
| State | New |
| Headers | show |
| Series | AM64: Add PCIe bindings and driver support | expand |
Hi, On 24/12/20 5:26 pm, Kishon Vijay Abraham I wrote: > 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 | 17 +++++++++++++++++ > 1 file changed, 17 insertions(+) > > diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c > index dac1ac8a7615..8ec6d9c3e164 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 +411,19 @@ 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"); missed initializing "ret" here. Will fix this and re-send new version. Thanks Kishon
diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c index dac1ac8a7615..8ec6d9c3e164 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 +411,19 @@ 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"); + 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 +492,7 @@ 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);
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 | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)