On Tue, Sep 23, 2014 at 12:28:03PM +0200, Antoine Tenart wrote: > Add a USB2 ChipIdea driver for ci13xxx, with optional PHY, clock > and DMA mask, to support USB2 ChipIdea controllers that don't need > specific functions. > > Tested on the Marvell Berlin SoCs USB controllers. > > Signed-off-by: Antoine Tenart <antoine.tenart@xxxxxxxxxxxxxxxxxx> > --- > drivers/usb/chipidea/Makefile | 1 + > drivers/usb/chipidea/ci_hdrc_usb2.c | 138 ++++++++++++++++++++++++++++++++++++ > 2 files changed, 139 insertions(+) > create mode 100644 drivers/usb/chipidea/ci_hdrc_usb2.c > > diff --git a/drivers/usb/chipidea/Makefile b/drivers/usb/chipidea/Makefile > index 2f099c7df7b5..1fc86a2ca22d 100644 > --- a/drivers/usb/chipidea/Makefile > +++ b/drivers/usb/chipidea/Makefile > @@ -10,6 +10,7 @@ ci_hdrc-$(CONFIG_USB_OTG_FSM) += otg_fsm.o > > # Glue/Bridge layers go here > > +obj-$(CONFIG_USB_CHIPIDEA) += ci_hdrc_usb2.o > obj-$(CONFIG_USB_CHIPIDEA) += ci_hdrc_msm.o > obj-$(CONFIG_USB_CHIPIDEA) += ci_hdrc_zevio.o > > diff --git a/drivers/usb/chipidea/ci_hdrc_usb2.c b/drivers/usb/chipidea/ci_hdrc_usb2.c > new file mode 100644 > index 000000000000..6eae1de587f2 > --- /dev/null > +++ b/drivers/usb/chipidea/ci_hdrc_usb2.c > @@ -0,0 +1,138 @@ > +/* > + * Copyright (C) 2014 Marvell Technology Group Ltd. > + * > + * Antoine Tenart <antoine.tenart@xxxxxxxxxxxxxxxxxx> > + * > + * This file is licensed under the terms of the GNU General Public > + * License version 2. This program is licensed "as is" without any > + * warranty of any kind, whether express or implied. > + */ > + > +#include <linux/clk.h> > +#include <linux/dma-mapping.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/phy/phy.h> > +#include <linux/platform_device.h> > +#include <linux/usb/chipidea.h> > +#include <linux/usb/hcd.h> > +#include <linux/usb/ulpi.h> > + > +#include "ci.h" > + > +struct ci_hdrc_usb2_priv { > + struct platform_device *ci_pdev; > + struct clk *clk; > +}; > + > +static int ci_hdrc_usb2_dt_probe(struct device *dev, > + struct ci_hdrc_platform_data *ci_pdata) > +{ > + ci_pdata->phy = of_phy_get(dev->of_node, 0); > + if (IS_ERR(ci_pdata->phy)) { > + if (PTR_ERR(ci_pdata->phy) == -EPROBE_DEFER) > + return -EPROBE_DEFER; > + > + /* PHY is optional */ > + ci_pdata->phy = NULL; > + } > + > + return 0; > +} > + > +static struct ci_hdrc_platform_data ci_default_pdata = { > + .capoffset = DEF_CAPOFFSET, > + .flags = CI_HDRC_REQUIRE_TRANSCEIVER | > + CI_HDRC_DISABLE_STREAMING, > +}; > + > +static int ci_hdrc_usb2_probe(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + struct ci_hdrc_usb2_priv *priv; > + struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(&pdev->dev); > + int ret; > + > + if (!ci_pdata) > + ci_pdata = &ci_default_pdata; > + > + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); > + if (!priv) > + return -ENOMEM; > + > + priv->clk = devm_clk_get(dev, NULL); > + if (!IS_ERR(priv->clk)) { > + ret = clk_prepare_enable(priv->clk); > + if (ret) { > + dev_err(dev, "failed to enable the clock: %d\n", ret); > + return ret; > + } > + } > + > + if (dev->of_node) { > + ret = ci_hdrc_usb2_dt_probe(dev, ci_pdata); > + if (ret) > + goto clk_err; > + } else { > + ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); > + if (ret) > + goto clk_err; > + } My suggestion: - call dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32)) for both dt and non-dt - Do not need function ci_hdrc_usb2_dt_probe, the phy handle should be moved to core driver, since your generic phy driver are still not accepted, I can't do it by myself. Either you or I can do it after your generic phy support series has been accepted. - Others are ok. Peter > + > + ci_pdata->name = dev_name(&pdev->dev); > + > + priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource, > + pdev->num_resources, ci_pdata); > + if (IS_ERR(priv->ci_pdev)) { > + ret = PTR_ERR(priv->ci_pdev); > + if (ret != -EPROBE_DEFER) > + dev_err(dev, > + "failed to register ci_hdrc platform device: %d\n", > + ret); > + goto clk_err; > + } > + > + platform_set_drvdata(pdev, priv); > + > + pm_runtime_no_callbacks(dev); > + pm_runtime_enable(dev); > + > + return 0; > + > +clk_err: > + if (!IS_ERR(priv->clk)) > + clk_disable_unprepare(priv->clk); > + return ret; > +} > + > +static int ci_hdrc_usb2_remove(struct platform_device *pdev) > +{ > + struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev); > + > + pm_runtime_disable(&pdev->dev); > + ci_hdrc_remove_device(priv->ci_pdev); > + clk_disable_unprepare(priv->clk); > + > + return 0; > +} > + > +static const struct of_device_id ci_hdrc_usb2_of_match[] = { > + { .compatible = "chipidea,usb2" }, > + { } > +}; > +MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match); > + > +static struct platform_driver ci_hdrc_usb2_driver = { > + .probe = ci_hdrc_usb2_probe, > + .remove = ci_hdrc_usb2_remove, > + .driver = { > + .name = "chipidea-usb2", > + .owner = THIS_MODULE, > + .of_match_table = of_match_ptr(ci_hdrc_usb2_of_match), > + }, > +}; > +module_platform_driver(ci_hdrc_usb2_driver); > + > +MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx"); > +MODULE_AUTHOR("Antoine Tenart <antoine.tenart@xxxxxxxxxxxxxxxxxx>"); > +MODULE_LICENSE("GPL"); > -- > 1.9.1 > -- Best Regards, Peter Chen -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html