2016-11-15 19:59:10

by John Youn

Subject: [PATCH v2] usb: dwc2: add amcc,dwc-otg support

From: Christian Lamparter <[email protected]>

This patch adds support for the "amcc,usb-otg" device
which is found in the PowerPC Canyonlands' dts.

The device definition was added by:

commit c89b3458d8cc ("powerpc/44x: Add USB DWC DTS entry to Canyonlands
board")

but without any driver support as the dwc2 driver wasn't available at
that time.

Note: The system can't use the generic "snps,dwc2" compatible
because of the special ahbcfg configuration. The default
GAHBCFG_HBSTLEN_INCR4 of snps,dwc2 can cause a system hang
when the USB and SATA is used concurrently.

Signed-off-by: Christian Lamparter <[email protected]>
Signed-off-by: John Youn <[email protected]>
---

v2 [johnyoun]:
* Removed params struct
* Minor commit message formatting

Documentation/devicetree/bindings/usb/dwc2.txt | 1 +
drivers/usb/dwc2/params.c | 1 +
2 files changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/dwc2.txt b/Documentation/devicetree/bindings/usb/dwc2.txt
index ad8f7ff..6c7c2bce 100644
--- a/Documentation/devicetree/bindings/usb/dwc2.txt
+++ b/Documentation/devicetree/bindings/usb/dwc2.txt
@@ -12,6 +12,7 @@ Required properties:
- "lantiq,xrx200-usb": The DWC2 USB controller instance in Lantiq XRX SoCs;
- "amlogic,meson8b-usb": The DWC2 USB controller instance in Amlogic Meson8b SoCs;
- "amlogic,meson-gxbb-usb": The DWC2 USB controller instance in Amlogic S905 SoCs;
+ - "amcc,dwc-otg": The DWC2 USB controller instance in AMCC Canyonlands 460EX SoCs;
- snps,dwc2: A generic DWC2 USB controller with default parameters.
- reg : Should contain 1 register range (address and length)
- interrupts : Should contain 1 interrupt
diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
index 513556a..7991c21 100644
--- a/drivers/usb/dwc2/params.c
+++ b/drivers/usb/dwc2/params.c
@@ -239,6 +239,7 @@ const struct of_device_id dwc2_of_match_table[] = {
{ .compatible = "samsung,s3c6400-hsotg", .data = NULL},
{ .compatible = "amlogic,meson8b-usb", .data = &params_amlogic },
{ .compatible = "amlogic,meson-gxbb-usb", .data = &params_amlogic },
+ { .compatible = "amcc,dwc-otg", .data = &params_amcc_dwc_otg },
{},
};
MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
--
2.10.0