From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Manish Narani <manish.narani@xilinx.com>
Cc: <gregkh@linuxfoundation.org>, <robh+dt@kernel.org>,
<michal.simek@xilinx.com>, <balbi@kernel.org>,
<p.zabel@pengutronix.de>, <linux-usb@vger.kernel.org>,
<devicetree@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <git@xilinx.com>
Subject: Re: [PATCH 2/2] usb: dwc3: Add driver for Xilinx platforms
Date: Thu, 27 Aug 2020 15:42:43 +0800 [thread overview]
Message-ID: <1598514163.21253.12.camel@mhfsdcap03> (raw)
In-Reply-To: <1598467441-124203-3-git-send-email-manish.narani@xilinx.com>
On Thu, 2020-08-27 at 00:14 +0530, Manish Narani wrote:
> Add a new driver for supporting Xilinx platforms. This driver handles
> the USB 3.0 PHY initialization and PIPE control & reset operations for
> ZynqMP platforms. This also handles the USB 2.0 PHY initialization and
> reset operations for Versal platforms.
>
> Signed-off-by: Manish Narani <manish.narani@xilinx.com>
> ---
> drivers/usb/dwc3/Kconfig | 8 +
> drivers/usb/dwc3/Makefile | 1 +
> drivers/usb/dwc3/dwc3-of-simple.c | 1 -
> drivers/usb/dwc3/dwc3-xilinx.c | 416 ++++++++++++++++++++++++++++++
> 4 files changed, 425 insertions(+), 1 deletion(-)
> create mode 100644 drivers/usb/dwc3/dwc3-xilinx.c
>
[...]
> +static int dwc3_xlnx_probe(struct platform_device *pdev)
> +{
> + struct dwc3_xlnx *priv_data;
> + struct device *dev = &pdev->dev;
> + struct device_node *np = dev->of_node;
> + struct resource *res;
> + void __iomem *regs;
> + int ret;
> +
> + priv_data = devm_kzalloc(dev, sizeof(*priv_data), GFP_KERNEL);
> + if (!priv_data)
> + return -ENOMEM;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!res) {
> + dev_err(dev, "missing memory resource\n");
> + return -ENODEV;
> + }
> +
> + regs = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(regs))
> + return PTR_ERR(regs);
Use devm_platform_ioremap_resource()?
> +
> + /* Store the usb control regs into priv_data for further usage */
> + priv_data->regs = regs;
> +
> + priv_data->dev = dev;
> +
> + platform_set_drvdata(pdev, priv_data);
> +
> + ret = clk_bulk_get_all(priv_data->dev, &priv_data->clks);
> + if (ret < 0)
> + return ret;
> +
> + priv_data->num_clocks = ret;
> +
> + ret = clk_bulk_prepare_enable(priv_data->num_clocks, priv_data->clks);
> + if (ret)
> + return ret;
> +
> + if (of_device_is_compatible(pdev->dev.of_node, "xlnx,zynqmp-dwc3")) {
> + ret = dwc3_xlnx_init_zynqmp(priv_data);
> + if (ret)
> + goto err_clk_put;
> + }
> +
> + if (of_device_is_compatible(pdev->dev.of_node, "xlnx,versal-dwc3")) {
> + ret = dwc3_xlnx_init_versal(priv_data);
> + if (ret)
> + goto err_clk_put;
> + }
> +
> + ret = of_platform_populate(np, NULL, NULL, dev);
> + if (ret)
> + goto err_clk_put;
> +
> + pm_runtime_set_active(dev);
> + pm_runtime_enable(dev);
> + pm_suspend_ignore_children(dev, false);
> + pm_runtime_get_sync(dev);
> +
> + pm_runtime_forbid(dev);
> +
> + return 0;
> +
> +err_clk_put:
> + clk_bulk_disable_unprepare(priv_data->num_clocks, priv_data->clks);
> + clk_bulk_put_all(priv_data->num_clocks, priv_data->clks);
> +
> + return ret;
> +}
> +
> +static int dwc3_xlnx_remove(struct platform_device *pdev)
> +{
> + struct dwc3_xlnx *priv_data = platform_get_drvdata(pdev);
> + struct device *dev = &pdev->dev;
> +
> + of_platform_depopulate(dev);
> +
> + clk_bulk_disable_unprepare(priv_data->num_clocks, priv_data->clks);
> + clk_bulk_put_all(priv_data->num_clocks, priv_data->clks);
> + priv_data->num_clocks = 0;
> +
> + pm_runtime_disable(dev);
> + pm_runtime_put_noidle(dev);
> + pm_runtime_set_suspended(dev);
> +
> + return 0;
> +}
> +
> +#ifdef CONFIG_PM
> +static int dwc3_xlnx_runtime_suspend(struct device *dev)
> +{
> + struct dwc3_xlnx *priv_data = dev_get_drvdata(dev);
> +
> + clk_bulk_disable(priv_data->num_clocks, priv_data->clks);
> +
> + return 0;
> +}
> +
> +static int dwc3_xlnx_runtime_idle(struct device *dev)
> +{
> + pm_runtime_mark_last_busy(dev);
> + pm_runtime_autosuspend(dev);
> +
> + return 0;
> +}
> +
> +static int dwc3_xlnx_runtime_resume(struct device *dev)
> +{
> + struct dwc3_xlnx *priv_data = dev_get_drvdata(dev);
> +
> + return clk_bulk_enable(priv_data->num_clocks, priv_data->clks);
> +}
> +#endif /* CONFIG_PM */
> +
> +#ifdef CONFIG_PM_SLEEP
> +static int dwc3_xlnx_suspend(struct device *dev)
> +{
> + struct dwc3_xlnx *priv_data = dev_get_drvdata(dev);
> +
> + /* Disable the clocks */
> + clk_bulk_disable(priv_data->num_clocks, priv_data->clks);
> +
> + return 0;
> +}
> +
> +static int dwc3_xlnx_resume(struct device *dev)
> +{
> + struct dwc3_xlnx *priv_data = dev_get_drvdata(dev);
> +
> + return clk_bulk_enable(priv_data->num_clocks, priv_data->clks);
> +}
> +#endif /* CONFIG_PM_SLEEP */
> +
> +static const struct dev_pm_ops dwc3_xlnx_dev_pm_ops = {
> + SET_SYSTEM_SLEEP_PM_OPS(dwc3_xlnx_suspend, dwc3_xlnx_resume)
> + SET_RUNTIME_PM_OPS(dwc3_xlnx_runtime_suspend, dwc3_xlnx_runtime_resume,
> + dwc3_xlnx_runtime_idle)
> +};
> +
> +static const struct of_device_id of_dwc3_xlnx_match[] = {
> + { .compatible = "xlnx,zynqmp-dwc3" },
> + { .compatible = "xlnx,versal-dwc3" },
> + { /* Sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, of_dwc3_xlnx_match);
> +
> +static struct platform_driver dwc3_xlnx_driver = {
> + .probe = dwc3_xlnx_probe,
> + .remove = dwc3_xlnx_remove,
> + .driver = {
> + .name = "dwc3-xilinx",
> + .of_match_table = of_dwc3_xlnx_match,
> + .pm = &dwc3_xlnx_dev_pm_ops,
> + },
> +};
> +
> +module_platform_driver(dwc3_xlnx_driver);
> +
> +MODULE_LICENSE("GPL v2");
> +MODULE_DESCRIPTION("Xilinx DWC3 controller specific glue driver");
> +MODULE_AUTHOR("Anurag Kumar Vulisha <anurag.kumar.vulisha@xilinx.com>");
> +MODULE_AUTHOR("Manish Narani <manish.narani@xilinx.com>");
next prev parent reply other threads:[~2020-08-27 7:44 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-26 18:43 [PATCH 0/2] Add a separate DWC3 OF driver for Xilinx platforms Manish Narani
2020-08-26 18:44 ` [PATCH 1/2] dt-bindings: usb: dwc3-xilinx: Add documentation for Versal DWC3 Controller Manish Narani
2020-09-08 23:05 ` Rob Herring
2020-09-09 15:46 ` Manish Narani
2020-09-09 16:00 ` Rob Herring
2020-08-26 18:44 ` [PATCH 2/2] usb: dwc3: Add driver for Xilinx platforms Manish Narani
2020-08-26 19:00 ` Randy Dunlap
2020-08-27 6:31 ` Felipe Balbi
2020-08-28 11:41 ` Manish Narani
2020-09-01 12:15 ` Felipe Balbi
2020-09-09 9:14 ` Manish Narani
2020-09-09 10:26 ` Felipe Balbi
2020-08-27 7:42 ` Chunfeng Yun [this message]
2020-08-27 9:02 ` Philipp Zabel
2020-08-27 18:46 ` Robin Murphy
2020-08-28 17:53 ` Manish Narani
2020-09-01 12:00 ` Robin Murphy
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