[PATCH 2/8] usb: chipidea: core: handle suspend/resume for each role

[Xu Yang <xu.yang_2@xxxxxxx>]

There may be a need to handle suspend/resume per role. This patch
will add this support.

Signed-off-by: Xu Yang <xu.yang_2@xxxxxxx>
---
 drivers/usb/chipidea/ci.h   | 4 ++++
 drivers/usb/chipidea/core.c | 8 ++++++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h
index a4a3be049910..005c67cb3afb 100644
--- a/drivers/usb/chipidea/ci.h
+++ b/drivers/usb/chipidea/ci.h
@@ -127,12 +127,16 @@ enum ci_revision {
  * struct ci_role_driver - host/gadget role driver
  * @start: start this role
  * @stop: stop this role
+ * @suspend: system suspend handler for this role
+ * @resume: system resume handler for this role
  * @irq: irq handler for this role
  * @name: role name string (host/gadget)
  */
 struct ci_role_driver {
 	int		(*start)(struct ci_hdrc *);
 	void		(*stop)(struct ci_hdrc *);
+	void		(*suspend)(struct ci_hdrc *ci);
+	void		(*resume)(struct ci_hdrc *ci, bool power_lost);
 	irqreturn_t	(*irq)(struct ci_hdrc *);
 	const char	*name;
 };
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 3a39eb5e7dca..7eeb667bc01b 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -1383,6 +1383,10 @@ static int ci_suspend(struct device *dev)
 		return 0;
 	}
 
+	/* Extra routine per role before system suspend */
+	if (ci->role != CI_ROLE_END && ci_role(ci)->suspend)
+		ci_role(ci)->suspend(ci);
+
 	if (device_may_wakeup(dev)) {
 		if (ci_otg_is_fsm_mode(ci))
 			ci_otg_fsm_suspend_for_srp(ci);
@@ -1422,6 +1426,10 @@ static int ci_resume(struct device *dev)
 		ci_usb_phy_init(ci);
 	}
 
+	/* Extra routine per role after system resume */
+	if (ci->role != CI_ROLE_END && ci_role(ci)->resume)
+		ci_role(ci)->resume(ci, power_lost);
+
 	if (power_lost)
 		ci_handle_power_lost(ci);
 
-- 
2.34.1