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usb: dwc3: add dis_u2_freeclk_exists_quirk

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Add a quirk to clear the GUSB2PHYCFG.U2_FREECLK_EXISTS bit,
which specifies whether the USB2.0 PHY provides a free-running
PHY clock, which is active when the clock control input is active.

Refer to commit 27f83eeb6b42("usb: dwc3: add dis_u2_freeclk_exists_quirk")
in Linux Rockchip Kernel.

Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
Tested-by: Jagan Teki <jagan@amarulasolutions.com>
This commit is contained in:
Frank Wang 2020-05-26 11:33:47 +08:00 committed by Kever Yang
parent 7bb6270839
commit b34f8b5de0
3 changed files with 9 additions and 0 deletions
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6
drivers/usb/dwc3/core.c
View File

@ -403,6 +403,9 @@ static void dwc3_phy_setup(struct dwc3 *dwc)
if (dwc->dis_enblslpm_quirk)
reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
if (dwc->dis_u2_freeclk_exists_quirk)
reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
mdelay(100);
@ -725,6 +728,7 @@ int dwc3_uboot_init(struct dwc3_device *dwc3_dev)
dwc->dis_u2_susphy_quirk = dwc3_dev->dis_u2_susphy_quirk;
dwc->dis_del_phy_power_chg_quirk = dwc3_dev->dis_del_phy_power_chg_quirk;
dwc->dis_enblslpm_quirk = dwc3_dev->dis_enblslpm_quirk;
dwc->dis_u2_freeclk_exists_quirk = dwc3_dev->dis_u2_freeclk_exists_quirk;
dwc->tx_de_emphasis_quirk = dwc3_dev->tx_de_emphasis_quirk;
if (dwc3_dev->tx_de_emphasis)
@ -934,6 +938,8 @@ void dwc3_of_parse(struct dwc3 *dwc)
"snps,dis-del-phy-power-chg-quirk");
dwc->dis_enblslpm_quirk = dev_read_bool(dev,
"snps,dis_enblslpm_quirk");
dwc->dis_u2_freeclk_exists_quirk = dev_read_bool(dev,
"snps,dis-u2-freeclk-exists-quirk");
dwc->tx_de_emphasis_quirk = dev_read_bool(dev,
"snps,tx_de_emphasis_quirk");
tmp = dev_read_u8_array_ptr(dev, "snps,tx_de_emphasis", 1);

2
drivers/usb/dwc3/core.h
View File

@ -162,6 +162,7 @@
/* Global USB2 PHY Configuration Register */
#define DWC3_GUSB2PHYCFG_PHYSOFTRST (1 << 31)
#define DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS (1 << 30)
#define DWC3_GUSB2PHYCFG_SUSPHY (1 << 6)
#define DWC3_GUSB2PHYCFG_ENBLSLPM (1 << 8)
#define DWC3_GUSB2PHYCFG_PHYIF(n) ((n) << 3)
@ -825,6 +826,7 @@ struct dwc3 {
unsigned dis_u2_susphy_quirk:1;
unsigned dis_del_phy_power_chg_quirk:1;
unsigned dis_enblslpm_quirk:1;
unsigned dis_u2_freeclk_exists_quirk:1;
unsigned tx_de_emphasis_quirk:1;
unsigned tx_de_emphasis:2;

1
include/dwc3-uboot.h
View File

@ -35,6 +35,7 @@ struct dwc3_device {
unsigned dis_u2_susphy_quirk;
unsigned dis_del_phy_power_chg_quirk;
unsigned dis_enblslpm_quirk;
unsigned dis_u2_freeclk_exists_quirk;
unsigned tx_de_emphasis_quirk;
unsigned tx_de_emphasis;
int index;