Hi,
On Thu, Oct 07, 2010 at 06:52:08AM -0500, Kalliguddi, Hema wrote:
Correct, so let's enable this VBUS PRESENCE IRQ in otg_init function
which will be called during gadget driver load. And call the VBUS PRESENCE
irq handler to capture the status and send the notifications.
It can't be done like this. What happen if user attaches the cable while
there's no gadget driver loaded ? Even in that situation, we want to
be able to charge with a wall charger, host/hub charger or even normal
SDP (at 100mA limit). If we start depending on a gadget driver for the
phy to work, there's something wrong.
Let's say we disable that logic. What will we use to detect a USB cable
attach ?
The status will be logged when the cable is connected. But the IRQ is
masked so, there will not be any IRQ. When link driver calls the
otg_init enable the logic for VBUS PRESENCE interrupt and call the VBUS
PRESENCE IRQ handler. If the status bit set anyway the handler will
send the notifications.
how about a dedicated charger ? A gadget driver isn't needed, because
wall chargers have data lines shortened together. There won't be
enumeration in that case.
Would you, please, explain the exact problem you're facing ? Without
that we will be running in circles here :-(
--
balbi
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