This selects the SOF/ITP counter be running on ref_clk. As documented
U2_FREECLK_EXISTS has to be set to 0 as well.
Signed-off-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
Reviewed-by: Li Jun <jun.li@xxxxxxx>
---
drivers/usb/dwc3/core.c | 8 +++++++-
drivers/usb/dwc3/core.h | 2 ++
2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 656bbf9285a5..885acc63f032 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -408,6 +408,10 @@ static void dwc3_ref_clk_period(struct dwc3 *dwc)
reg |= FIELD_PREP(DWC3_GFLADJ_REFCLK_FLADJ_MASK, fladj)
| FIELD_PREP(DWC3_GFLADJ_240MHZDECR, decr >> 1)
| FIELD_PREP(DWC3_GFLADJ_240MHZDECR_PLS1, decr & 1);
+
+ if (dwc->gfladj_refclk_lpm_sel)
+ reg |= DWC3_GFLADJ_REFCLK_LPM_SEL;
+
dwc3_writel(dwc->regs, DWC3_GFLADJ, reg);
}
@@ -789,7 +793,7 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
else
reg |= DWC3_GUSB2PHYCFG_ENBLSLPM;
- if (dwc->dis_u2_freeclk_exists_quirk)
+ if (dwc->dis_u2_freeclk_exists_quirk || dwc->gfladj_refclk_lpm_sel)
reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
@@ -1525,6 +1529,8 @@ static void dwc3_get_properties(struct dwc3 *dwc)
"snps,dis-tx-ipgap-linecheck-quirk");
dwc->parkmode_disable_ss_quirk = device_property_read_bool(dev,
"snps,parkmode-disable-ss-quirk");
+ dwc->gfladj_refclk_lpm_sel = device_property_read_bool(dev,
+ "snps,gfladj-refclk-lpm-sel-quirk");
dwc->tx_de_emphasis_quirk = device_property_read_bool(dev,
"snps,tx_de_emphasis_quirk");
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 7c9368145f37..d28c942e63dd 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -391,6 +391,7 @@
#define DWC3_GFLADJ_30MHZ_SDBND_SEL BIT(7)
#define DWC3_GFLADJ_30MHZ_MASK 0x3f
#define DWC3_GFLADJ_REFCLK_FLADJ_MASK GENMASK(21, 8)
+#define DWC3_GFLADJ_REFCLK_LPM_SEL BIT(23)
#define DWC3_GFLADJ_240MHZDECR GENMASK(30, 24)
#define DWC3_GFLADJ_240MHZDECR_PLS1 BIT(31)
@@ -1312,6 +1313,7 @@ struct dwc3 {
unsigned dis_del_phy_power_chg_quirk:1;
unsigned dis_tx_ipgap_linecheck_quirk:1;
unsigned parkmode_disable_ss_quirk:1;
+ unsigned gfladj_refclk_lpm_sel:1;
unsigned tx_de_emphasis_quirk:1;
unsigned tx_de_emphasis:2;
--
2.25.1
