On 03/29/2018 03:42 PM, Neil Armstrong wrote: > Signed-off-by: Neil Armstrong <narmstr...@baylibre.com> > --- > drivers/usb/host/Kconfig | 7 ++ > drivers/usb/host/Makefile | 1 + > drivers/usb/host/dwc3-of-simple.c | 187 > ++++++++++++++++++++++++++++++++++++++ > 3 files changed, 195 insertions(+) > create mode 100644 drivers/usb/host/dwc3-of-simple.c > > diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig > index a7249b7..6caa615 100644 > --- a/drivers/usb/host/Kconfig > +++ b/drivers/usb/host/Kconfig > @@ -21,6 +21,13 @@ config USB_XHCI_DWC3 > Say Y or if your system has a Dual Role SuperSpeed > USB controller based on the DesignWare USB3 IP Core. > > +config USB_XHCI_DWC3_OF_SIMPLE > + bool "DesignWare USB3 DRD Generic OF Simple Glue Layer" > + select MISC > + help > + Support USB2/3 functionality in simple SoC integrations with > + USB controller based on the DesignWare USB3 IP Core. > + > config USB_XHCI_MVEBU > bool "MVEBU USB 3.0 support" > default y > diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile > index 9819489..abe4f90 100644 > --- a/drivers/usb/host/Makefile > +++ b/drivers/usb/host/Makefile > @@ -49,6 +49,7 @@ obj-$(CONFIG_USB_EHCI_ZYNQ) += ehci-zynq.o > # xhci > obj-$(CONFIG_USB_XHCI_HCD) += xhci.o xhci-mem.o xhci-ring.o > obj-$(CONFIG_USB_XHCI_DWC3) += xhci-dwc3.o > +obj-$(CONFIG_USB_XHCI_DWC3_OF_SIMPLE) += dwc3-of-simple.o > obj-$(CONFIG_USB_XHCI_ROCKCHIP) += xhci-rockchip.o > obj-$(CONFIG_USB_XHCI_ZYNQMP) += xhci-zynqmp.o > obj-$(CONFIG_USB_XHCI_KEYSTONE) += xhci-keystone.o > diff --git a/drivers/usb/host/dwc3-of-simple.c > b/drivers/usb/host/dwc3-of-simple.c > new file mode 100644 > index 0000000..826a996 > --- /dev/null > +++ b/drivers/usb/host/dwc3-of-simple.c > @@ -0,0 +1,187 @@ > +/* > + * dwc3-of-simple.c - OF glue layer for simple integrations > + * > + * Copyright (c) 2015 Texas Instruments Incorporated - http://www.ti.com > + * > + * Author: Felipe Balbi <ba...@ti.com> > + * > + * Copyright (C) 2018 BayLibre, SAS > + * Author: Neil Armstrong <narmst...@baylibre.com> > + * > + * SPDX-License-Identifier: GPL-2.0+ > + */ > + > +#include <common.h> > +#include <dm.h> > +#include <fdtdec.h> > +#include <reset.h> > +#include <clk.h> > + > +DECLARE_GLOBAL_DATA_PTR; > + > +struct dwc3_of_simple { > +#if CONFIG_IS_ENABLED(CLK) > + struct clk *clks; > + int num_clocks; > +#endif > +#if CONFIG_IS_ENABLED(DM_RESET) > + struct reset_ctl *resets; > + int num_resets; > +#endif > +}; > + > +#if CONFIG_IS_ENABLED(DM_RESET) > +static int dwc3_of_simple_reset_init(struct udevice *dev, > + struct dwc3_of_simple *simple, > + int count) > +{ > + int i, ret, err; > + > + if (!count) > + return 0; > + > + simple->resets = devm_kcalloc(dev, count, sizeof(struct reset_ctl), > + GFP_KERNEL); > + if (!simple->resets) > + return -ENOMEM; > + > + for (i = 0; i < count; i++) { > + ret = reset_get_by_index(dev, i, &simple->resets[i]); > + if (ret < 0) > + break; > + > + ret = reset_request(&simple->resets[i]); > + if (ret) { > + pr_err("failed to request reset line %d\n", i); > + reset_free(&simple->resets[i]); > + goto reset_err; > + } > + > + > + ++simple->num_resets; > + } > + > + for (i = 0; i < simple->num_resets; i++) { > + ret = reset_deassert(&simple->resets[i]); > + if (ret && ret != -ENOSYS && ret != -ENOTSUPP) { > + pr_err("failed to deassert reset line %d\n", i); > + goto reset_err; > + } > + } > + > + return 0;
This looks like some driver I've seen before. Isn't there similar code for simple EHCI or OHCI driver already ? -- Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
