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UPSTREAM: usb: dwc3: switch to peripheral mode when exiting 

This allow the phy to enter idle and then suspend.
the K2 platforms require the PHY to be suspended before the USB domain
clock can be turned off.

Change-Id: Id674a95ff3cacb9e614cdc583f4a755e8301b7d7
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
(cherry picked from commit bbe3d4a6c14e17d251029e4dde07f184244e9a4a)
This commit is contained in:
Jean-Jacques Hiblot 2019-09-11 11:33:45 +02:00 committed by Frank Wang
parent 5d262e9885
commit 2f6edaae3c
1 changed files with 13 additions and 0 deletions
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13
drivers/usb/dwc3/core.c
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@ -590,6 +590,12 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
return 0; return 0;
} }
static void dwc3_gadget_run(struct dwc3 *dwc)
{
dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_RUN_STOP);
mdelay(100);
}
static void dwc3_core_exit_mode(struct dwc3 *dwc) static void dwc3_core_exit_mode(struct dwc3 *dwc)
{ {
switch (dwc->dr_mode) { switch (dwc->dr_mode) {
@ -607,6 +613,13 @@ static void dwc3_core_exit_mode(struct dwc3 *dwc)
/* do nothing */ /* do nothing */
break; break;
} }
/*
* switch back to peripheral mode
* This enables the phy to enter idle and then, if enabled, suspend.
*/
dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
dwc3_gadget_run(dwc);
} }
#define DWC3_ALIGN_MASK (16 - 1) #define DWC3_ALIGN_MASK (16 - 1)