[PATCH v5 2/8] usb: dwc3: add disable usb3 suspend phy quirk

[Huang Rui <ray.huang@amd.com>]

This patch adds disable usb3 suspend phy quirk, and some special platforms
can configure that if it is needed.

Signed-off-by: Huang Rui <ray.huang@amd.com>
---
 Documentation/devicetree/bindings/usb/dwc3.txt | 1 +
 drivers/usb/dwc3/core.c                        | 6 ++++++
 drivers/usb/dwc3/core.h                        | 2 ++
 drivers/usb/dwc3/platform_data.h               | 1 +
 4 files changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt
index b724b2e..08b394e 100644
--- a/Documentation/devicetree/bindings/usb/dwc3.txt
+++ b/Documentation/devicetree/bindings/usb/dwc3.txt
@@ -32,6 +32,7 @@ Optional properties:
  - snps,tx_de_emphasis_quirk: when set core will set Tx de-emphasis value.
  - snps,tx_de_emphasis: the value driven to the PHY is controlled by the
 			LTSSM during USB3 Compliance mode.
+ - snps,dis_u3_susphy_quirk: when set core will disable USB3 suspend phy.
 
 This is usually a subnode to DWC3 glue to which it is connected.
 
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index e7e877a..6ec4176 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -404,6 +404,9 @@ static void dwc3_phy_setup(struct dwc3 *dwc)
 	if (dwc->tx_de_emphasis_quirk)
 		reg |= DWC3_GUSB3PIPECTL_TX_DEEPH(dwc->tx_de_emphasis);
 
+	if (dwc->dis_u3_susphy_quirk && dwc->is_fpga)
+		reg &= ~DWC3_GUSB3PIPECTL_SUSPHY;
+
 	dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
 
 	mdelay(100);
@@ -807,6 +810,8 @@ static int dwc3_probe(struct platform_device *pdev)
 				"snps,lfps_filter_quirk");
 		dwc->rx_detect_poll_quirk = of_property_read_bool(node,
 				"snps,rx_detect_poll_quirk");
+		dwc->dis_u3_susphy_quirk = of_property_read_bool(node,
+				"snps,dis_u3_susphy_quirk");
 
 		dwc->tx_de_emphasis_quirk = of_property_read_bool(node,
 				"snps,tx_de_emphasis_quirk");
@@ -829,6 +834,7 @@ static int dwc3_probe(struct platform_device *pdev)
 		dwc->del_phy_power_chg_quirk = pdata->del_phy_power_chg_quirk;
 		dwc->lfps_filter_quirk = pdata->lfps_filter_quirk;
 		dwc->rx_detect_poll_quirk = pdata->rx_detect_poll_quirk;
+		dwc->dis_u3_susphy_quirk = pdata->dis_u3_susphy_quirk;
 
 		dwc->tx_de_emphasis_quirk = pdata->tx_de_emphasis_quirk;
 		if (pdata->tx_de_emphasis)
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index cf9aaca..fa778b0 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -697,6 +697,7 @@ struct dwc3_scratchpad_array {
  * @del_phy_power_chg_quirk: set if we enable delay phy power change quirk
  * @lfps_filter_quirk: set if we enable LFPS filter quirk
  * @rx_detect_poll_quirk: set if we enable rx_detect to polling lfps quirk
+ * @dis_u3_susphy_quirk: set if we disable usb3 suspend phy
  * @tx_de_emphasis_quirk: set if we enable Tx de-emphasis quirk
  * @tx_de_emphasis: Tx de-emphasis value
  * 	0	- -6dB de-emphasis
@@ -818,6 +819,7 @@ struct dwc3 {
 	unsigned		del_phy_power_chg_quirk:1;
 	unsigned		lfps_filter_quirk:1;
 	unsigned		rx_detect_poll_quirk:1;
+	unsigned		dis_u3_susphy_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 e1ab900..0f1d5ad 100644
--- a/drivers/usb/dwc3/platform_data.h
+++ b/drivers/usb/dwc3/platform_data.h
@@ -36,6 +36,7 @@ struct dwc3_platform_data {
 	unsigned del_phy_power_chg_quirk:1;
 	unsigned lfps_filter_quirk:1;
 	unsigned rx_detect_poll_quirk:1;
+	unsigned dis_u3_susphy_quirk:1;
 
 	unsigned tx_de_emphasis_quirk:1;
 	unsigned tx_de_emphasis:2;
-- 
1.9.1