This is a note to let you know that I've just added the patch titled
Subject: USB: twl4030: Enable USB regulators before enabling USB charging
to my gregkh-2.6 tree. Its filename is
usb-twl4030-enable-usb-regulators-before-enabling-usb-charging.patch
This tree can be found at
http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/
>From leed.aguilar@xxxxxx Fri Nov 20 13:10:53 2009
From: "Aguilar Pena, Leed" <leed.aguilar@xxxxxx>
Date: Fri, 20 Nov 2009 11:32:53 -0600
Subject: USB: twl4030: Enable USB regulators before enabling USB charging
To: "linux-usb@xxxxxxxxxxxxxxx" <linux-usb@xxxxxxxxxxxxxxx>
Cc: "dbrownell@xxxxxxxxxxxxxxxxxxxxx" <dbrownell@xxxxxxxxxxxxxxxxxxxxx>, "gregkh@xxxxxxx" <gregkh@xxxxxxx>
Message-ID: <23D0CDE7C386D144A4F26EB0F427F8C074D70BE5@xxxxxxxxxxxxxxxxx>
For TWL family of power management ICs, USB charging works only
when USB regulators are in enabled state: 3v1, 1v5, 1v8
On a USB cable attach, twl4030_phy_resume(twl) function enables
the regulators. Enable USB charging, only after all regulators
are enabled.
Its observed that enabling USB charging before regulators are
enabled, causes USB charging to fail.
Tested on: Zoom2: omap3430: ES3.1 + TWL5030
Needs T2-MADC and T2-BCI drivers which are still not upstreamed.
Signed-off-by: Moiz Sonasath <m-sonasath@xxxxxx>
Signed-off-by: Leed Aguilar <leed.aguilar@xxxxxx>
Acked-by: Vikram Pandita <vikram.pandita@xxxxxx>
Acked-by: Anand Gadiyar <gadiyar@xxxxxx>
Acked-by: Nishanth Menon <nm@xxxxxx>
Acked-by: Felipe Balbi <felipe.balbi@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/otg/twl4030-usb.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/usb/otg/twl4030-usb.c
+++ b/drivers/usb/otg/twl4030-usb.c
@@ -598,12 +598,12 @@ static irqreturn_t twl4030_usb_irq(int i
* USB_LINK_VBUS state. musb_hdrc won't care until it
* starts to handle softconnect right.
*/
- twl4030charger_usb_en(status == USB_LINK_VBUS);
-
if (status == USB_LINK_NONE)
twl4030_phy_suspend(twl, 0);
else
twl4030_phy_resume(twl);
+
+ twl4030charger_usb_en(status == USB_LINK_VBUS);
}
sysfs_notify(&twl->dev->kobj, NULL, "vbus");
--
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