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usb: chipidea: Consolidate extcon notifiers 

The two extcon notifiers are almost the same except for the
variable name for the cable structure and the id notifier inverts
the cable->state logic. Make it the same and replace two
functions with one to save some lines. This also makes it so that
the id cable state is true when the id pin is pulled low, so we
change the name of ->state to ->connected to properly reflect
that we're interested in the cable being connected.

Acked-by: Peter Chen <peter.chen@nxp.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Ivan T. Ivanov" <iivanov.xz@gmail.com>
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
This commit is contained in:
Stephen Boyd 2017-01-20 15:11:55 +08:00 committed by Peter Chen
parent 7bb7e9b1a4
commit 5cc4926899
3 changed files with 18 additions and 39 deletions
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45
drivers/usb/chipidea/core.c
View File

@ -577,35 +577,14 @@ static irqreturn_t ci_irq(int irq, void *data)
return ret;
}
static int ci_vbus_notifier(struct notifier_block *nb, unsigned long event,
void *ptr)
static int ci_cable_notifier(struct notifier_block *nb, unsigned long event,
void *ptr)
{
struct ci_hdrc_cable *vbus = container_of(nb, struct ci_hdrc_cable, nb);
struct ci_hdrc *ci = vbus->ci;
struct ci_hdrc_cable *cbl = container_of(nb, struct ci_hdrc_cable, nb);
struct ci_hdrc *ci = cbl->ci;
if (event)
vbus->state = true;
else
vbus->state = false;
vbus->changed = true;
ci_irq(ci->irq, ci);
return NOTIFY_DONE;
}
static int ci_id_notifier(struct notifier_block *nb, unsigned long event,
void *ptr)
{
struct ci_hdrc_cable *id = container_of(nb, struct ci_hdrc_cable, nb);
struct ci_hdrc *ci = id->ci;
if (event)
id->state = false;
else
id->state = true;
id->changed = true;
cbl->connected = event;
cbl->changed = true;
ci_irq(ci->irq, ci);
return NOTIFY_DONE;
@ -714,27 +693,27 @@ static int ci_get_platdata(struct device *dev,
}
cable = &platdata->vbus_extcon;
cable->nb.notifier_call = ci_vbus_notifier;
cable->nb.notifier_call = ci_cable_notifier;
cable->edev = ext_vbus;
if (!IS_ERR(ext_vbus)) {
ret = extcon_get_state(cable->edev, EXTCON_USB);
if (ret)
cable->state = true;
cable->connected = true;
else
cable->state = false;
cable->connected = false;
}
cable = &platdata->id_extcon;
cable->nb.notifier_call = ci_id_notifier;
cable->nb.notifier_call = ci_cable_notifier;
cable->edev = ext_id;
if (!IS_ERR(ext_id)) {
ret = extcon_get_state(cable->edev, EXTCON_USB_HOST);
if (ret)
cable->state = false;
cable->connected = true;
else
cable->state = true;
cable->connected = false;
}
return 0;
}

8
drivers/usb/chipidea/otg.c
View File

@ -44,7 +44,7 @@ u32 hw_read_otgsc(struct ci_hdrc *ci, u32 mask)
else
val &= ~OTGSC_BSVIS;
if (cable->state)
if (cable->connected)
val |= OTGSC_BSV;
else
val &= ~OTGSC_BSV;
@ -62,10 +62,10 @@ u32 hw_read_otgsc(struct ci_hdrc *ci, u32 mask)
else
val &= ~OTGSC_IDIS;
if (cable->state)
val |= OTGSC_ID;
if (cable->connected)
val &= ~OTGSC_ID; /* host */
else
val &= ~OTGSC_ID;
val |= OTGSC_ID; /* device */
if (cable->enabled)
val |= OTGSC_IDIE;

4
include/linux/usb/chipidea.h
View File

@ -12,7 +12,7 @@ struct ci_hdrc;
/**
* struct ci_hdrc_cable - structure for external connector cable state tracking
* @state: current state of the line
* @connected: true if cable is connected, false otherwise
* @changed: set to true when extcon event happen
* @enabled: set to true if we've enabled the vbus or id interrupt
* @edev: device which generate events
@ -21,7 +21,7 @@ struct ci_hdrc;
* @conn: used for notification registration
*/
struct ci_hdrc_cable {
bool state;
bool connected;
bool changed;
bool enabled;
struct extcon_dev *edev;