usb: dwc3: add dis_del_phy_power_chg_quirk

Add a quirk to clear the GUSB3PIPECTL.DELAYP1TRANS bit,
which specifies whether disable delay PHY power change
from P0 to P1/P2/P3 when link state changing from U0
to U1/U2/U3 respectively.

Signed-off-by: William Wu <william.wu@rock-chips.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt
index 020b0e9..e96bfc2 100644 (file)
--- a/Documentation/devicetree/bindings/usb/dwc3.txt
+++ b/Documentation/devicetree/bindings/usb/dwc3.txt
@@ -42,6 +42,8 @@ Optional properties:
  - snps,dis-u2-freeclk-exists-quirk: when set, clear the u2_freeclk_exists
                        in GUSB2PHYCFG, specify that USB2 PHY doesn't provide
                        a free-running PHY clock.
+ - snps,dis-del-phy-power-chg-quirk: when set core will change PHY power
+                       from P0 to P1/P2/P3 without delay.
  - snps,is-utmi-l1-suspend: true when DWC3 asserts output signal
                        utmi_l1_suspend_n, false when asserts utmi_sleep_n
  - snps,hird-threshold: HIRD threshold

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index edbca03..b5e0ccc 100644 (file)
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -448,6 +448,9 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
        if (dwc->dis_u3_susphy_quirk)
                reg &= ~DWC3_GUSB3PIPECTL_SUSPHY;
 
+       if (dwc->dis_del_phy_power_chg_quirk)
+               reg &= ~DWC3_GUSB3PIPECTL_DEPOCHANGE;
+
        dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
 
        reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
@@ -947,6 +950,8 @@ static int dwc3_probe(struct platform_device *pdev)
                                "snps,dis_rxdet_inp3_quirk");
        dwc->dis_u2_freeclk_exists_quirk = device_property_read_bool(dev,
                                "snps,dis-u2-freeclk-exists-quirk");
+       dwc->dis_del_phy_power_chg_quirk = device_property_read_bool(dev,
+                               "snps,dis-del-phy-power-chg-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 cc4f551..3d94acd 100644 (file)
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -818,6 +818,8 @@ struct dwc3_scratchpad_array {
  * @dis_u2_freeclk_exists_quirk : set if we clear u2_freeclk_exists
  *                     in GUSB2PHYCFG, specify that USB2 PHY doesn't
  *                     provide a free-running PHY clock.
+ * @dis_del_phy_power_chg_quirk: set if we disable delay phy power
+ *                     change quirk.
  * @tx_de_emphasis_quirk: set if we enable Tx de-emphasis quirk
  * @tx_de_emphasis: Tx de-emphasis value
  *     0       - -6dB de-emphasis
@@ -963,6 +965,7 @@ struct dwc3 {
        unsigned                dis_enblslpm_quirk:1;
        unsigned                dis_rxdet_inp3_quirk:1;
        unsigned                dis_u2_freeclk_exists_quirk:1;
+       unsigned                dis_del_phy_power_chg_quirk:1;
 
        unsigned                tx_de_emphasis_quirk:1;
        unsigned                tx_de_emphasis:2;