Merge tag 'usb-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB / Thunderbolt updates from Greg KH:
 "Here is the big set of USB and Thunderbolt driver updates for
  5.16-rc1.

  Nothing major in here, just lots of little cleanups and additions for
  new hardware, all of which have been in linux-next for a while with no
  reported problems.

  Included in here are:

   - tiny Thunderbolt driver updates

   - USB typec driver updates

   - USB serial driver updates

   - USB gadget driver updates

   - dwc2 and dwc3 controller driver updates

   - tiny USB host driver updates

   - minor USB driver fixes and updates

   - USB dts updates for various platforms"

* tag 'usb-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (123 commits)
  usb: gadget: Mark USB_FSL_QE broken on 64-bit
  usb: gadget: f_mass_storage: Disable eps during disconnect
  usb: gadget: udc: core: Revise comments for USB ep enable/disable
  USB: serial: keyspan: fix memleak on probe errors
  USB: serial: cp210x: use usb_control_msg_recv() and usb_control_msg_send()
  USB: serial: ch314: use usb_control_msg_recv()
  USB: iowarrior: fix control-message timeouts
  Documentation: USB: fix example bulk-message timeout
  usb: dwc2: stm32mp15: set otg_rev
  usb: dwc2: add otg_rev and otg_caps information for gadget driver
  dt-bindings: usb: dwc2: adopt otg properties defined in usb-drd.yaml
  dt-bindings: usb: dwc2: Add reference to usb-drd.yaml
  usb: gadget: uvc: implement dwPresentationTime and scrSourceClock
  usb: gadget: uvc: use on returned header len in video_encode_isoc_sg
  usb:gadget: f_uac1: fixed sync playback
  Docs: usb: remove :c:func: for usb_register and usb_deregister
  Docs: usb: update struct usb_driver
  usb: gadget: configfs: change config attributes file operation
  usb: gadget: configfs: add cfg_to_gadget_info() helper
  usb: dwc3: Align DWC3_EP_* flag macros
  ...

1 files changed, 29 insertions, 0 deletions

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 0104a80b185e..643239d7d370 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -26,6 +26,7 @@
 #include <linux/acpi.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/reset.h>
+#include <linux/bitfield.h>
 
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
@@ -336,6 +337,29 @@ static void dwc3_frame_length_adjustment(struct dwc3 *dwc)
 }
 
 /**
+ * dwc3_ref_clk_period - Reference clock period configuration
+ *		Default reference clock period depends on hardware
+ *		configuration. For systems with reference clock that differs
+ *		from the default, this will set clock period in DWC3_GUCTL
+ *		register.
+ * @dwc: Pointer to our controller context structure
+ * @ref_clk_per: reference clock period in ns
+ */
+static void dwc3_ref_clk_period(struct dwc3 *dwc)
+{
+	u32 reg;
+
+	if (dwc->ref_clk_per == 0)
+		return;
+
+	reg = dwc3_readl(dwc->regs, DWC3_GUCTL);
+	reg &= ~DWC3_GUCTL_REFCLKPER_MASK;
+	reg |=  FIELD_PREP(DWC3_GUCTL_REFCLKPER_MASK, dwc->ref_clk_per);
+	dwc3_writel(dwc->regs, DWC3_GUCTL, reg);
+}
+
+
+/**
  * dwc3_free_one_event_buffer - Frees one event buffer
  * @dwc: Pointer to our controller context structure
  * @evt: Pointer to event buffer to be freed
@@ -1007,6 +1031,9 @@ static int dwc3_core_init(struct dwc3 *dwc)
 	/* Adjust Frame Length */
 	dwc3_frame_length_adjustment(dwc);
 
+	/* Adjust Reference Clock Period */
+	dwc3_ref_clk_period(dwc);
+
 	dwc3_set_incr_burst_type(dwc);
 
 	usb_phy_set_suspend(dwc->usb2_phy, 0);
@@ -1389,6 +1416,8 @@ static void dwc3_get_properties(struct dwc3 *dwc)
 				    &dwc->hsphy_interface);
 	device_property_read_u32(dev, "snps,quirk-frame-length-adjustment",
 				 &dwc->fladj);
+	device_property_read_u32(dev, "snps,ref-clock-period-ns",
+				 &dwc->ref_clk_per);
 
 	dwc->dis_metastability_quirk = device_property_read_bool(dev,
 				"snps,dis_metastability_quirk");