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Subject[PATCH 4.3 102/125] usb: dwc3: Add dis_enblslpm_quirk
Date
4.3-stable review patch.  If anyone has any objections, please let me know.

------------------

From: John Youn <John.Youn@synopsys.com>

commit ec791d149bca4511e7d3a6a92bb3b030c5a443f9 upstream.

Add a quirk to clear the GUSB2PHYCFG.ENBLSLPM bit, which controls
whether the PHY receives the suspend signal from the controller.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
Documentation/devicetree/bindings/usb/dwc3.txt | 2 ++
drivers/usb/dwc3/core.c | 6 ++++++
drivers/usb/dwc3/core.h | 4 ++++
drivers/usb/dwc3/platform_data.h | 1 +
4 files changed, 13 insertions(+)

--- a/Documentation/devicetree/bindings/usb/dwc3.txt
+++ b/Documentation/devicetree/bindings/usb/dwc3.txt
@@ -35,6 +35,8 @@ Optional properties:
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.
+ - snps,dis_enblslpm_quirk: when set clears the enblslpm in GUSB2PHYCFG,
+ disabling the suspend signal to the PHY.
- 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
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -488,6 +488,9 @@ static int dwc3_phy_setup(struct dwc3 *d
if (dwc->dis_u2_susphy_quirk)
reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;

+ if (dwc->dis_enblslpm_quirk)
+ reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
+
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);

return 0;
@@ -885,6 +888,8 @@ static int dwc3_probe(struct platform_de
"snps,dis_u3_susphy_quirk");
dwc->dis_u2_susphy_quirk = of_property_read_bool(node,
"snps,dis_u2_susphy_quirk");
+ dwc->dis_enblslpm_quirk = device_property_read_bool(dev,
+ "snps,dis_enblslpm_quirk");

dwc->tx_de_emphasis_quirk = of_property_read_bool(node,
"snps,tx_de_emphasis_quirk");
@@ -915,6 +920,7 @@ static int dwc3_probe(struct platform_de
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->dis_enblslpm_quirk = pdata->dis_enblslpm_quirk;

dwc->tx_de_emphasis_quirk = pdata->tx_de_emphasis_quirk;
if (pdata->tx_de_emphasis)
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -178,6 +178,7 @@
#define DWC3_GUSB2PHYCFG_PHYSOFTRST (1 << 31)
#define DWC3_GUSB2PHYCFG_SUSPHY (1 << 6)
#define DWC3_GUSB2PHYCFG_ULPI_UTMI (1 << 4)
+#define DWC3_GUSB2PHYCFG_ENBLSLPM (1 << 8)

/* Global USB2 PHY Vendor Control Register */
#define DWC3_GUSB2PHYACC_NEWREGREQ (1 << 25)
@@ -715,6 +716,8 @@ struct dwc3_scratchpad_array {
* @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
+ * @dis_enblslpm_quirk: set if we clear enblslpm in GUSB2PHYCFG,
+ * disabling the suspend signal to the PHY.
* @tx_de_emphasis_quirk: set if we enable Tx de-emphasis quirk
* @tx_de_emphasis: Tx de-emphasis value
* 0 - -6dB de-emphasis
@@ -859,6 +862,7 @@ struct dwc3 {
unsigned rx_detect_poll_quirk:1;
unsigned dis_u3_susphy_quirk:1;
unsigned dis_u2_susphy_quirk:1;
+ unsigned dis_enblslpm_quirk:1;

unsigned tx_de_emphasis_quirk:1;
unsigned tx_de_emphasis:2;
--- a/drivers/usb/dwc3/platform_data.h
+++ b/drivers/usb/dwc3/platform_data.h
@@ -42,6 +42,7 @@ struct dwc3_platform_data {
unsigned rx_detect_poll_quirk:1;
unsigned dis_u3_susphy_quirk:1;
unsigned dis_u2_susphy_quirk:1;
+ unsigned dis_enblslpm_quirk:1;

unsigned tx_de_emphasis_quirk:1;
unsigned tx_de_emphasis:2;



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