This patch adds disable usb2 suspend phy quirk, and some special platforms
can configure that if it is needed.
Signed-off-by: Huang Rui <ray.huang@xxxxxxx>
---
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 08b394e..f200ecc 100644
--- a/Documentation/devicetree/bindings/usb/dwc3.txt
+++ b/Documentation/devicetree/bindings/usb/dwc3.txt
@@ -33,6 +33,7 @@ Optional properties:
- 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.
+ - snps,dis_u2_susphy_quirk: when set core will disable USB2 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 6ec4176..25f1446 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -422,6 +422,9 @@ static void dwc3_phy_setup(struct dwc3 *dwc)
if (dwc->revision > DWC3_REVISION_194A)
reg |= DWC3_GUSB2PHYCFG_SUSPHY;
+ if (dwc->dis_u2_susphy_quirk && dwc->is_fpga)
+ reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
+
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
mdelay(100);
@@ -812,6 +815,8 @@ static int dwc3_probe(struct platform_device *pdev)
"snps,rx_detect_poll_quirk");
dwc->dis_u3_susphy_quirk = of_property_read_bool(node,
"snps,dis_u3_susphy_quirk");
+ dwc->dis_u2_susphy_quirk = of_property_read_bool(node,
+ "snps,dis_u2_susphy_quirk");
dwc->tx_de_emphasis_quirk = of_property_read_bool(node,
"snps,tx_de_emphasis_quirk");
@@ -835,6 +840,7 @@ static int dwc3_probe(struct platform_device *pdev)
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->dis_u2_susphy_quirk = pdata->dis_u2_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 fa778b0..cf86d30 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -698,6 +698,7 @@ struct dwc3_scratchpad_array {
* @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
+ * @dis_u2_susphy_quirk: set if we disable usb2 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
@@ -820,6 +821,7 @@ struct dwc3 {
unsigned lfps_filter_quirk:1;
unsigned rx_detect_poll_quirk:1;
unsigned dis_u3_susphy_quirk:1;
+ unsigned dis_u2_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 0f1d5ad..245300b 100644
--- a/drivers/usb/dwc3/platform_data.h
+++ b/drivers/usb/dwc3/platform_data.h
@@ -37,6 +37,7 @@ struct dwc3_platform_data {
unsigned lfps_filter_quirk:1;
unsigned rx_detect_poll_quirk:1;
unsigned dis_u3_susphy_quirk:1;
+ unsigned dis_u2_susphy_quirk:1;
unsigned tx_de_emphasis_quirk:1;
unsigned tx_de_emphasis:2;
--
1.9.1
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