usb: chipidea: core: handle suspend/resume for each role

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@nxp.com>
Acked-by: Peter Chen <peter.chen@kernel.org>
Link: https://lore.kernel.org/r/20221013151442.3262951-3-xu.yang_2@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h
index a4a3be0..005c67c 100644 (file)
--- 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 80267b9..2b170b4 100644 (file)
--- 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);