[PATCH v12 3/9] usb: separate out sysdev pointer from usb_bus
Peter Chen
hzpeterchen at gmail.com
Thu Feb 9 18:42:36 PST 2017
On Thu, Feb 09, 2017 at 11:50:32AM +0530, Vivek Gautam wrote:
> Hi,
>
> On Mon, Feb 6, 2017 at 2:43 PM, Peter Chen <peter.chen at nxp.com> wrote:
> > From: Arnd Bergmann <arnd at arndb.de>
> >
> > For xhci-hcd platform device, all the DMA parameters are not
> > configured properly, notably dma ops for dwc3 devices.
> >
> > The idea here is that you pass in the parent of_node along with
> > the child device pointer, so it would behave exactly like the
> > parent already does. The difference is that it also handles all
> > the other attributes besides the mask.
> >
> > sysdev will represent the physical device, as seen from firmware
> > or bus.Splitting the usb_bus->controller field into the
> > Linux-internal device (used for the sysfs hierarchy, for printks
> > and for power management) and a new pointer (used for DMA,
> > DT enumeration and phy lookup) probably covers all that we really
> > need.
> >
> > Signed-off-by: Arnd Bergmann <arnd at arndb.de>
> > Signed-off-by: Sriram Dash <sriram.dash at nxp.com>
> > Tested-by: Baolin Wang <baolin.wang at linaro.org>
> > Tested-by: Brian Norris <briannorris at chromium.org>
> > Tested-by: Alexander Sverdlin <alexander.sverdlin at nokia.com>
> > Tested-by: Vivek Gautam <vivek.gautam at codeaurora.org>
> > Signed-off-by: Mathias Nyman <mathias.nyman at linux.intel.com>
> > Cc: Felipe Balbi <felipe.balbi at linux.intel.com>
> > Cc: Grygorii Strashko <grygorii.strashko at ti.com>
> > Cc: Sinjan Kumar <sinjank at codeaurora.org>
> > Cc: David Fisher <david.fisher1 at synopsys.com>
> > Cc: Catalin Marinas <catalin.marinas at arm.com>
> > Cc: "Thang Q. Nguyen" <tqnguyen at apm.com>
> > Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh at renesas.com>
> > Cc: Stephen Boyd <sboyd at codeaurora.org>
> > Cc: Bjorn Andersson <bjorn.andersson at linaro.org>
> > Cc: Ming Lei <tom.leiming at gmail.com>
> > Cc: Jon Masters <jcm at redhat.com>
> > Cc: Dann Frazier <dann.frazier at canonical.com>
> > Cc: Peter Chen <peter.chen at nxp.com>
> > Cc: Leo Li <pku.leo at gmail.com>
> > ---
> > drivers/usb/core/buffer.c | 12 ++++++------
> > drivers/usb/core/hcd.c | 48 ++++++++++++++++++++++++++++-------------------
> > drivers/usb/core/usb.c | 18 +++++++++---------
> > include/linux/usb.h | 1 +
> > include/linux/usb/hcd.h | 3 +++
> > 5 files changed, 48 insertions(+), 34 deletions(-)
>
> [snip]
>
> > @@ -2511,8 +2512,8 @@ static void init_giveback_urb_bh(struct giveback_urb_bh *bh)
> > * Return: On success, a pointer to the created and initialized HCD structure.
> > * On failure (e.g. if memory is unavailable), %NULL.
> > */
>
> sorry for the noise, but a minor nit here.
> The comments section above explains usb_create_shared_hcd() method
> and so should be moved down to its place.
Will update it at v13
>
> > -struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver,
> > - struct device *dev, const char *bus_name,
> > +struct usb_hcd *__usb_create_hcd(const struct hc_driver *driver,
> > + struct device *sysdev, struct device *dev, const char *bus_name,
> > struct usb_hcd *primary_hcd)
> > {
> > struct usb_hcd *hcd;
> > @@ -2553,8 +2554,9 @@ struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver,
> >
> > usb_bus_init(&hcd->self);
> > hcd->self.controller = dev;
> > + hcd->self.sysdev = sysdev;
> > hcd->self.bus_name = bus_name;
> > - hcd->self.uses_dma = (dev->dma_mask != NULL);
> > + hcd->self.uses_dma = (sysdev->dma_mask != NULL);
> >
> > init_timer(&hcd->rh_timer);
> > hcd->rh_timer.function = rh_timer_func;
> > @@ -2569,6 +2571,14 @@ struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver,
> > "USB Host Controller";
> > return hcd;
> > }
> > +EXPORT_SYMBOL_GPL(__usb_create_hcd);
> > +
> > +struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver,
> > + struct device *dev, const char *bus_name,
> > + struct usb_hcd *primary_hcd)
> > +{
> > + return __usb_create_hcd(driver, dev, dev, bus_name, primary_hcd);
> > +}
> > EXPORT_SYMBOL_GPL(usb_create_shared_hcd);
>
>
> Regards
> Vivek
>
> --
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> a Linux Foundation Collaborative Project
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--
Best Regards,
Peter Chen
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