usb: dwc3: add dis_del_phy_power_chg_quirk

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

Change-Id: I23e33f8b13001d6f86d6473ad43a261d9bda8f79
Signed-off-by: Wu Liang feng <wulf@rock-chips.com>

diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt
index f1806c4f21e8954418ed24f145c1bddadee62f15..8de381a44708d3d0c6f44e6eeebb563c0c5bee0e 100644 (file)
--- a/Documentation/devicetree/bindings/usb/dwc3.txt
+++ b/Documentation/devicetree/bindings/usb/dwc3.txt
@@ -43,6 +43,8 @@ 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 e7aab0926712bca1ffb7359bebda34c0f8e69803..ca8e7257e13dbff993a1e17108e10e0cc343a812 100644 (file)
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -468,6 +468,9 @@ 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));
@@ -949,6 +952,8 @@ static int dwc3_probe(struct platform_device *pdev)
                                "snps,dis_enblslpm_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->phyif_utmi_16_bits = device_property_read_bool(dev,
                                "snps,phyif_utmi_16_bits");
 
@@ -987,6 +992,8 @@ static int dwc3_probe(struct platform_device *pdev)
                dwc->dis_enblslpm_quirk = pdata->dis_enblslpm_quirk;
                dwc->dis_u2_freeclk_exists_quirk =
                                        pdata->dis_u2_freeclk_exists_quirk;
+               dwc->dis_del_phy_power_chg_quirk =
+                                       pdata->dis_del_phy_power_chg_quirk;
                dwc->phyif_utmi_16_bits = pdata->phyif_utmi_16_bits;
 
                dwc->tx_de_emphasis_quirk = pdata->tx_de_emphasis_quirk;

diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 32ac0dd5a97e7ceaca5c069619dcd6870599f31b..c5d7a5e799623389e93ec2dfbbe2429ce3b9a7bb 100644 (file)
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -737,6 +737,8 @@ 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
@@ -884,6 +886,7 @@ struct dwc3 {
        unsigned                dis_u2_susphy_quirk:1;
        unsigned                dis_enblslpm_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;

diff --git a/drivers/usb/dwc3/platform_data.h b/drivers/usb/dwc3/platform_data.h
index aa5739a58c8670d328365e878f6954cce09574e6..b44e818c062eaff0c9832fb244705595dee35d97 100644 (file)
--- a/drivers/usb/dwc3/platform_data.h
+++ b/drivers/usb/dwc3/platform_data.h
@@ -45,6 +45,7 @@ struct dwc3_platform_data {
        unsigned dis_u2_susphy_quirk:1;
        unsigned dis_enblslpm_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;