diff options
| author | Felipe Balbi <felipe.balbi@linux.intel.com> | 2024-04-12 22:26:03 +0200 |
|---|---|---|
| committer | Mattijs Korpershoek <mkorpershoek@baylibre.com> | 2024-05-16 08:38:24 +0200 |
| commit | d107a5319e20d5e5be3bd8fa298aeca9ef4990a0 (patch) | |
| tree | 52d9e9db6ac61f0d5e7a865bcdbba3ff9b100b03 | |
| parent | 967b31c3ccdc09284a4447ebc4577bb7ef06d500 (diff) | |
| download | u-boot-d107a5319e20d5e5be3bd8fa298aeca9ef4990a0.tar.gz | |
usb: dwc3: gadget: only resume USB2 PHY in <=HIGHSPEED
Upstream Linux commit ab2a92e7a608.
As a micro-power optimization, let's only resume the
USB2 PHY if we're working on <=HIGHSPEED. If we're
gonna work on SUPERSPEED or SUPERSPEED+, there's no
point in resuming the USB2 PHY.
Fixes: 2b0f11df84bb ("usb: dwc3: gadget: clear SUSPHY bit before ep cmds")
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Link: https://lore.kernel.org/r/20240412202611.3565052-4-alexander.sverdlin@siemens.com
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 06a29ed8640..bcd55a7d274 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -313,11 +313,13 @@ int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, * We will also set SUSPHY bit to what it was before returning as stated * by the same section on Synopsys databook. */ - reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); - if (unlikely(reg & DWC3_GUSB2PHYCFG_SUSPHY)) { - susphy = true; - reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; - dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); + if (dwc->gadget.speed <= USB_SPEED_HIGH) { + reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); + if (unlikely(reg & DWC3_GUSB2PHYCFG_SUSPHY)) { + susphy = true; + reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); + } } dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0); |