The patch follows the qualcomm code comments setting
SSUSB_CTRL_TEST_POWERDOWN to 0x1 and is testing and clearing the
Bit during usb superspeed phy init.
Fixes: dwc3 module unloading and re-loading
Signed-off-by: Thomas Reifferscheid <tho...@reifferscheid.org>
---
Changes since v3:
* Revert v1/v2
* Set SSUSB_CTRL_TEST_POWERDOWN instead
* Test and clear the bit during ss init
Changes since v2:
* be more verbose
Changes since v1:
* be more verbose in explaining the mistake
.../ipq806x/patches-4.9/0032-phy-add-qcom-dwc3-phy.patch | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/target/linux/ipq806x/patches-4.9/0032-phy-add-qcom-dwc3-phy.patch
b/target/linux/ipq806x/patches-4.9/0032-phy-add-qcom-dwc3-phy.patch
index 39e918f..ee37866 100644
--- a/target/linux/ipq806x/patches-4.9/0032-phy-add-qcom-dwc3-phy.patch
+++ b/target/linux/ipq806x/patches-4.9/0032-phy-add-qcom-dwc3-phy.patch
@@ -39,7 +39,7 @@ Signed-off-by: Andy Gross <agr...@codeaurora.org>
+obj-$(CONFIG_PHY_QCOM_DWC3) += phy-qcom-dwc3.o
--- /dev/null
+++ b/drivers/phy/phy-qcom-dwc3.c
-@@ -0,0 +1,484 @@
+@@ -0,0 +1,492 @@
+/* Copyright (c) 2014-2015, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
@@ -331,6 +331,14 @@ Signed-off-by: Andy Gross <agr...@codeaurora.org>
+
+ /* reset phy */
+ data = readl(phy_dwc3->base + SSUSB_PHY_CTRL_REG);
++
++ /* Test and clear SSUSB_CTRL_TEST_POWERDOWN */
++ if (data & SSUSB_CTRL_TEST_POWERDOWN) {
++ qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
++ SSUSB_CTRL_TEST_POWERDOWN, 0x0);
++ data = readl(phy_dwc3->base + SSUSB_PHY_CTRL_REG);
++ }
++
+ writel(data | SSUSB_CTRL_SS_PHY_RESET,
+ phy_dwc3->base + SSUSB_PHY_CTRL_REG);
+ usleep_range(2000, 2200);
@@ -420,7 +428,7 @@ Signed-off-by: Andy Gross <agr...@codeaurora.org>
+ qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
+ SSUSB_CTRL_REF_USE_PAD, 0x0);
+ qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
-+ SSUSB_CTRL_TEST_POWERDOWN, 0x0);
++ SSUSB_CTRL_TEST_POWERDOWN, SSUSB_CTRL_TEST_POWERDOWN);
+
+ return 0;
+}
--
2.1.4
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