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Patch "usb: dwc3: Add dis_enblslpm_quirk" has been added to the 4.2-stable tree

PATCH [email protected] 1 participant 1 message Dec 7, 2015

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Stable branch Device tree bindings USB DesignWare USB3 DRD IP driver
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This is a note to let you know that I've just added the patch titled

usb: dwc3: Add dis_enblslpm_quirk

to the 4.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
usb-dwc3-add-dis_enblslpm_quirk.patch
and it can be found in the queue-4.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From ec791d149bca4511e7d3a6a92bb3b030c5a443f9 Mon Sep 17 00:00:00 2001

From: John Youn <[email protected]>
Date: Fri, 2 Oct 2015 20:30:57 -0700
Subject: usb: dwc3: Add dis_enblslpm_quirk

From: John Youn <[email protected]>

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 <[email protected]>
Signed-off-by Felipe Balbi <[email protected]>
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 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(+)
Documentation/devicetree/bindings/usb/dwc3.txt +2 -0
@@ -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
drivers/usb/dwc3/core.c +6 -0
@@ -490,6 +490,9 @@ 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;

@@ -887,6 +890,8 @@ 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");

@@ -917,6 +922,7 @@ 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)
drivers/usb/dwc3/core.h +4 -0
@@ -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;
drivers/usb/dwc3/platform_data.h +1 -0
@@ -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;

Patches currently in stable-queue which might be from [email protected] are

queue-4.2/usb-dwc3-support-synopsys-usb-3.1-ip.patch queue-4.2/usb-dwc3-pci-set-enblslpm-quirk-for-synopsys-platforms.patch queue-4.2/usb-dwc3-pci-add-platform-data-for-synopsys-haps.patch queue-4.2/usb-dwc3-pci-add-the-pci-product-id-for-synopsys-usb-3.1.patch queue-4.2/usb-dwc3-add-dis_enblslpm_quirk.patch queue-4.2/usb-dwc3-pci-add-the-synopsys-haps-axi-product-id.patch