USB: OTG: msm: Add support for power management

Implement runtime and system pm ops to put hardware into low power
mode (LPM). As part of LPM, USB clocks are turned off, PHY is put
into suspend state and PHY comparators are turned off if VBUS/Id
notifications are not required from PHY.

Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/usb/msm_hsusb.h b/include/linux/usb/msm_hsusb.h
index b796df94ec72..3675e03b1539 100644
--- a/include/linux/usb/msm_hsusb.h
+++ b/include/linux/usb/msm_hsusb.h
@@ -88,6 +88,8 @@ struct msm_otg_platform_data {
  * @regs: ioremapped register base address.
  * @inputs: OTG state machine inputs(Id, SessValid etc).
  * @sm_work: OTG state machine work.
+ * @in_lpm: indicates low power mode (LPM) state.
+ * @async_int: Async interrupt arrived.
  *
  */
 struct msm_otg {
@@ -103,6 +105,8 @@ struct msm_otg {
 #define B_SESS_VLD      1
         unsigned long inputs;
         struct work_struct sm_work;
+        atomic_t in_lpm;
+        int async_int;
 };
 
 #endif
diff --git a/include/linux/usb/msm_hsusb_hw.h b/include/linux/usb/msm_hsusb_hw.h
index b061cffcf048..b92e17349c7b 100644
--- a/include/linux/usb/msm_hsusb_hw.h
+++ b/include/linux/usb/msm_hsusb_hw.h
@@ -44,6 +44,9 @@
 #define ULPI_DATA(n)          ((n) & 255)
 #define ULPI_DATA_READ(n)     (((n) >> 8) & 255)
 
+#define ASYNC_INTR_CTRL         (1 << 29) /* Enable async interrupt */
+#define ULPI_STP_CTRL           (1 << 30) /* Block communication with PHY */
+
 /* OTG definitions */
 #define OTGSC_INTSTS_MASK       (0x7f << 16)
 #define OTGSC_ID                (1 << 8)