From 7c38405ca7bde60e6d3cffb87a086fc7a805a85c Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Wed, 27 Aug 2014 15:23:53 -0700
Subject: [PATCH] Revert "usb: ehci/ohci-exynos: Fix PHY getting sequence"
This reverts commit 039368901ad0a6476c7ecf0cfe4f84d735e30135.
Vivek writes:
We not longer need this patch, since we have planned to remove
the usb-phy drivers for samsung [1], we have completely deleted
the support for the the same from ohci-exynos and ehci-exynos
drivers too [2]. Sorry for the confusion, but this patch can be
dropped and instead we can pick the patches in [2].
[1] http://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg35774.html
[2] https://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg35695.html
https://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg35696.html
Cc: Sachin Kamat <sachin.kamat@samsung.com>
Cc: Vivek Gautam <gautam.vivek@samsung.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Sachin Kamat <sachin.kamat@samsung.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/host/ehci-exynos.c | 40 ++++++++++++++---------------
drivers/usb/host/ohci-exynos.c | 47 ++++++++++++++++++----------------
2 files changed, 45 insertions(+), 42 deletions(-)
diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index 2eed9a4f89a9..cda0a2f5c467 100644
--- a/drivers/usb/host/ehci-exynos.c
+++ b/drivers/usb/host/ehci-exynos.c
@@ -62,6 +62,18 @@ static int exynos_ehci_get_phy(struct device *dev,
int phy_number;
int ret = 0;
+ exynos_ehci->phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
+ if (IS_ERR(exynos_ehci->phy)) {
+ ret = PTR_ERR(exynos_ehci->phy);
+ if (ret != -ENXIO && ret != -ENODEV) {
+ dev_err(dev, "no usb2 phy configured\n");
+ return ret;
+ }
+ dev_dbg(dev, "Failed to get usb2 phy\n");
+ } else {
+ exynos_ehci->otg = exynos_ehci->phy->otg;
+ }
+
for_each_available_child_of_node(dev->of_node, child) {
ret = of_property_read_u32(child, "reg", &phy_number);
if (ret) {
@@ -78,27 +90,15 @@ static int exynos_ehci_get_phy(struct device *dev,
phy = devm_of_phy_get(dev, child, NULL);
of_node_put(child);
- if (IS_ERR(phy))
- /* Lets fallback to older USB-PHYs */
- goto usb_phy_old;
- exynos_ehci->phy_g[phy_number] = phy;
- /* Make the older PHYs unavailable */
- exynos_ehci->phy = ERR_PTR(-ENXIO);
- }
-
- return 0;
-
-usb_phy_old:
- exynos_ehci->phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
- if (IS_ERR(exynos_ehci->phy)) {
- ret = PTR_ERR(exynos_ehci->phy);
- if (ret != -ENXIO && ret != -ENODEV) {
- dev_err(dev, "no usb2 phy configured\n");
- return ret;
+ if (IS_ERR(phy)) {
+ ret = PTR_ERR(phy);
+ if (ret != -ENOSYS && ret != -ENODEV) {
+ dev_err(dev, "no usb2 phy configured\n");
+ return ret;
+ }
+ dev_dbg(dev, "Failed to get usb2 phy\n");
}
- dev_dbg(dev, "Failed to get usb2 phy\n");
- } else {
- exynos_ehci->otg = exynos_ehci->phy->otg;
+ exynos_ehci->phy_g[phy_number] = phy;
}
return ret;
diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
index 7c48e3f3146b..a72ab8fe8cd3 100644
--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -51,12 +51,27 @@ static int exynos_ohci_get_phy(struct device *dev,
int phy_number;
int ret = 0;
+ exynos_ohci->phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
+ if (IS_ERR(exynos_ohci->phy)) {
+ ret = PTR_ERR(exynos_ohci->phy);
+ if (ret != -ENXIO && ret != -ENODEV) {
+ dev_err(dev, "no usb2 phy configured\n");
+ return ret;
+ }
+ dev_dbg(dev, "Failed to get usb2 phy\n");
+ } else {
+ exynos_ohci->otg = exynos_ohci->phy->otg;
+ }
+
/*
* Getting generic phy:
* We are keeping both types of phys as a part of transiting OHCI
* to generic phy framework, so as to maintain backward compatibilty
- * with old DTB too.
- * We fallback to older USB-PHYs when we fail to get generic PHYs.
+ * with old DTB.
+ * If there are existing devices using DTB files built from them,
+ * to remove the support for old bindings in this driver,
+ * we need to make sure that such devices have their DTBs
+ * updated to ones built from new DTS.
*/
for_each_available_child_of_node(dev->of_node, child) {
ret = of_property_read_u32(child, "reg", &phy_number);
@@ -74,27 +89,15 @@ static int exynos_ohci_get_phy(struct device *dev,
phy = devm_of_phy_get(dev, child, NULL);
of_node_put(child);
- if (IS_ERR(phy))
- /* Lets fallback to older USB-PHYs */
- goto usb_phy_old;
- exynos_ohci->phy_g[phy_number] = phy;
- /* Make the older PHYs unavailable */
- exynos_ohci->phy = ERR_PTR(-ENXIO);
- }
-
- return 0;
-
-usb_phy_old:
- exynos_ohci->phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
- if (IS_ERR(exynos_ohci->phy)) {
- ret = PTR_ERR(exynos_ohci->phy);
- if (ret != -ENXIO && ret != -ENODEV) {
- dev_err(dev, "no usb2 phy configured\n");
- return ret;
+ if (IS_ERR(phy)) {
+ ret = PTR_ERR(phy);
+ if (ret != -ENOSYS && ret != -ENODEV) {
+ dev_err(dev, "no usb2 phy configured\n");
+ return ret;
+ }
+ dev_dbg(dev, "Failed to get usb2 phy\n");
}
- dev_dbg(dev, "Failed to get usb2 phy\n");
- } else {
- exynos_ohci->otg = exynos_ohci->phy->otg;
+ exynos_ohci->phy_g[phy_number] = phy;
}
return ret;
--
2.20.1