This is a note to let you know that I've just added the patch titled
usb: dwc2/gadget: fix phy initialization sequence
to the 3.16-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-dwc2-gadget-fix-phy-initialization-sequence.patch
and it can be found in the queue-3.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ca2c5ba80f823a38c4aae506e2f03c1afb076b0a Mon Sep 17 00:00:00 2001
From: Kamil Debski <k.debski@xxxxxxxxxxx>
Date: Tue, 9 Sep 2014 10:44:09 +0200
Subject: usb: dwc2/gadget: fix phy initialization sequence
From: Kamil Debski <k.debski@xxxxxxxxxxx>
commit ca2c5ba80f823a38c4aae506e2f03c1afb076b0a upstream.
In the Generic PHY Framework a NULL phy is considered to be a valid phy
thus the "if (hsotg->phy)" check does not give us the information whether
the Generic PHY Framework is used.
In addition to the above this patch also removes phy_init from probe and
phy_exit from remove. This is not necessary when init/exit is done in the
s3c_hsotg_phy_enable/disable functions.
Signed-off-by: Kamil Debski <k.debski@xxxxxxxxxxx>
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Signed-off-by: Robert Baldyga <r.baldyga@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/dwc2/gadget.c | 27 ++++++++++++---------------
1 file changed, 12 insertions(+), 15 deletions(-)
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -2748,13 +2748,14 @@ static void s3c_hsotg_phy_enable(struct
dev_dbg(hsotg->dev, "pdev 0x%p\n", pdev);
- if (hsotg->phy) {
- phy_init(hsotg->phy);
- phy_power_on(hsotg->phy);
- } else if (hsotg->uphy)
+ if (hsotg->uphy)
usb_phy_init(hsotg->uphy);
- else if (hsotg->plat->phy_init)
+ else if (hsotg->plat && hsotg->plat->phy_init)
hsotg->plat->phy_init(pdev, hsotg->plat->phy_type);
+ else {
+ phy_init(hsotg->phy);
+ phy_power_on(hsotg->phy);
+ }
}
/**
@@ -2768,13 +2769,14 @@ static void s3c_hsotg_phy_disable(struct
{
struct platform_device *pdev = to_platform_device(hsotg->dev);
- if (hsotg->phy) {
- phy_power_off(hsotg->phy);
- phy_exit(hsotg->phy);
- } else if (hsotg->uphy)
+ if (hsotg->uphy)
usb_phy_shutdown(hsotg->uphy);
- else if (hsotg->plat->phy_exit)
+ else if (hsotg->plat && hsotg->plat->phy_exit)
hsotg->plat->phy_exit(pdev, hsotg->plat->phy_type);
+ else {
+ phy_power_off(hsotg->phy);
+ phy_exit(hsotg->phy);
+ }
}
/**
@@ -3489,9 +3491,6 @@ static int s3c_hsotg_probe(struct platfo
if (hsotg->phy && (phy_get_bus_width(phy) == 8))
hsotg->phyif = GUSBCFG_PHYIF8;
- if (hsotg->phy)
- phy_init(hsotg->phy);
-
/* usb phy enable */
s3c_hsotg_phy_enable(hsotg);
@@ -3584,8 +3583,6 @@ static int s3c_hsotg_remove(struct platf
usb_gadget_unregister_driver(hsotg->driver);
}
- if (hsotg->phy)
- phy_exit(hsotg->phy);
clk_disable_unprepare(hsotg->clk);
return 0;
Patches currently in stable-queue which might be from k.debski@xxxxxxxxxxx are
queue-3.16/usb-dwc2-gadget-fix-phy-disable-sequence.patch
queue-3.16/usb-dwc2-gadget-fix-phy-initialization-sequence.patch
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