usb: dwc3: Implement interrupt moderation
Implement interrupt moderation which allows the interrupt rate to be
throttled. To enable this feature the dwc->imod_interval must be set to
1 or greater. This value specifies the minimum inter-interrupt interval,
in 250 ns increments. A value of 0 disables interrupt moderation.
This applies for DWC_usb3 version 3.00a and higher and for DWC_usb31
version 1.20a and higher.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Change-Id: I5c5997c6eea817e49102b8e080f3a9bcf45305b4
Git-commit: cf40b86b6ef6df5262ef5a8463b42524e6aa5590
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
[hemantk@codeaurora.org: removed write to DWC3_DEV_IMOD in dwc3_interrupt,
and fixed merge conflicts]
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Signed-off-by: Mayank Rana <mrana@codeaurora.org>
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 94f65e4..6a97762 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1109,6 +1109,15 @@
#define DWC3_ALIGN_MASK (16 - 1)
+/* check whether the core supports IMOD */
+bool dwc3_has_imod(struct dwc3 *dwc)
+{
+ return ((dwc3_is_usb3(dwc) &&
+ dwc->revision >= DWC3_REVISION_300A) ||
+ (dwc3_is_usb31(dwc) &&
+ dwc->revision >= DWC3_USB31_REVISION_120A));
+}
+
static int dwc3_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;