This patch modify the generic code handling PHYs to allow them to be
supplied from the drivers. This adds checks to ensure no PHY was already
there when looking for one in the generic code. This also makes sure we
do not modify its state in the generic HCD functions, it it was
provided by the driver.
Signed-off-by: Antoine Ténart <antoine.ten...@free-electrons.com>
---
drivers/usb/core/hcd.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 228bad89f09b..ce9ea309ab0f 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -2650,7 +2650,7 @@ int usb_add_hcd(struct usb_hcd *hcd,
}
}
- if (IS_ENABLED(CONFIG_GENERIC_PHY)) {
+ if (IS_ENABLED(CONFIG_GENERIC_PHY) && !hcd->phy) {
struct phy *phy = phy_get(hcd->self.controller, "usb");
if (IS_ERR(phy)) {
@@ -2670,6 +2670,7 @@ int usb_add_hcd(struct usb_hcd *hcd,
goto err_phy;
}
hcd->phy = phy;
+ hcd->remove_phy = 1;
}
}
@@ -2816,7 +2817,7 @@ err_allocate_root_hub:
err_register_bus:
hcd_buffer_destroy(hcd);
err_create_buf:
- if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->phy) {
+ if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->remove_phy && hcd->phy) {
phy_power_off(hcd->phy);
phy_exit(hcd->phy);
phy_put(hcd->phy);
@@ -2900,7 +2901,7 @@ void usb_remove_hcd(struct usb_hcd *hcd)
usb_deregister_bus(&hcd->self);
hcd_buffer_destroy(hcd);
- if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->phy) {
+ if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->remove_phy && hcd->phy) {
phy_power_off(hcd->phy);
phy_exit(hcd->phy);
phy_put(hcd->phy);
--
1.9.1
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