@@ -3298,7 +3298,6 @@ static int dwc2_host_is_b_hnp_enabled(struct dwc2_hsotg *hsotg)
int dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex)
{
unsigned long flags;
- u32 hprt0;
u32 pcgctl;
u32 gotgctl;
int ret = 0;
@@ -3323,22 +3322,12 @@ int dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex)
break;
case DWC2_POWER_DOWN_PARAM_HIBERNATION:
case DWC2_POWER_DOWN_PARAM_NONE:
- default:
- hprt0 = dwc2_read_hprt0(hsotg);
- hprt0 |= HPRT0_SUSP;
- dwc2_writel(hsotg, hprt0, HPRT0);
- hsotg->bus_suspended = true;
/*
- * If power_down is supported, Phy clock will be suspended
- * after registers are backuped.
+ * If not hibernation nor partial power down are supported,
+ * clock gating is used to save power.
*/
- if (!hsotg->params.power_down) {
- /* Suspend the Phy Clock */
- pcgctl = dwc2_readl(hsotg, PCGCTL);
- pcgctl |= PCGCTL_STOPPCLK;
- dwc2_writel(hsotg, pcgctl, PCGCTL);
- udelay(10);
- }
+ dwc2_host_enter_clock_gating(hsotg);
+ break;
}
/* For HNP the bus must be suspended for at least 200ms */
Updates the implementation of entering clock gating mode when core receives port suspend. Instead of setting the required bit fields of the registers inline, called the "dwc2_host_enter_clock_gating()" function. Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com> --- drivers/usb/dwc2/hcd.c | 19 ++++--------------- 1 file changed, 4 insertions(+), 15 deletions(-)