Define CONFIG_USB_GADGET_DWC2_OTG_PHY_BUS_WIDTH_8 to allow the
physical interface to be 8-bit (rather than 16-bit).
Signed-off-by: Steve Rae <s...@broadcom.com>
---
from [1] (line ~124)
/* The Kona PHY supports an 8-bit wide UTMI interface */
[...snip...]
module_platform_driver(bcm_kona_usb2_driver);
MODULE_ALIAS("platform:bcm-kona-usb2");
MODULE_AUTHOR("Matt Porter <mpor...@linaro.org>");
MODULE_DESCRIPTION("BCM Kona USB 2.0 PHY driver");
MODULE_LICENSE("GPL v2");
[1]
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/phy/phy-bcm-kona-usb2.c
Changes in v4:
- split defconfig's into separate patch (per Marek)
Changes in v3:
- implement Marek's suggestion
Changes in v2:
- implement as Kconfig
drivers/usb/gadget/Kconfig | 10 ++++++++++
drivers/usb/gadget/dwc2_udc_otg.c | 4 ++++
2 files changed, 14 insertions(+)
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index a35a1c7..ae62476 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -52,6 +52,16 @@ config USB_GADGET_DWC2_OTG
driver to operate in Peripheral mode. This option requires
USB_GADGET to be enabled.
+if USB_GADGET_DWC2_OTG
+
+config USB_GADGET_DWC2_OTG_PHY_BUS_WIDTH_8
+ bool "DesignWare USB2.0 HS OTG controller 8-bit PHY bus width"
+ help
+ Set the Designware USB2.0 high-speed OTG controller
+ PHY interface width to 8 bits, rather than the default (16 bits).
+
+endif # USB_GADGET_DWC2_OTG
+
config CI_UDC
bool "ChipIdea device controller"
select USB_GADGET_DUALSPEED
diff --git a/drivers/usb/gadget/dwc2_udc_otg.c
b/drivers/usb/gadget/dwc2_udc_otg.c
index cb20b00..a23278d 100644
--- a/drivers/usb/gadget/dwc2_udc_otg.c
+++ b/drivers/usb/gadget/dwc2_udc_otg.c
@@ -415,7 +415,11 @@ static void reconfig_usbd(struct dwc2_udc *dev)
|0<<7 /* Ulpi DDR sel*/
|0<<6 /* 0: high speed utmi+, 1: full speed serial*/
|0<<4 /* 0: utmi+, 1:ulpi*/
+#ifdef CONFIG_USB_GADGET_DWC2_OTG_PHY_BUS_WIDTH_8
+ |0<<3 /* phy i/f 0:8bit, 1:16bit*/
+#else
|1<<3 /* phy i/f 0:8bit, 1:16bit*/
+#endif
|0x7<<0; /* HS/FS Timeout**/
if (dev->pdata->usb_gusbcfg)
--
1.8.5
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