ptp-notifier: Changed get_ptp_hwtime callback

Issue: Current callback directly uses the hw interface function without
ptp_lock. This might give wrong HW PTP time.

Fix: Defined wrapper function which uses ptp_lock for reading the HW
PTP time. Added this wrapper function as callback for get_ptp_hwtime.

Bug 200316642

Change-Id: I2db4fefbf5ffbea6353bcb6b4f9b675e0becb165
Signed-off-by: Abhijit <abhijit@nvidia.com>
Reviewed-on: https://git-master/r/1504339
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Sumeet Gupta <sumeetg@nvidia.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/include/linux/platform/tegra/ptp-notifier.h b/include/linux/platform/tegra/ptp-notifier.h
index 57a7b0070..17bd5e52c 100644
--- a/include/linux/platform/tegra/ptp-notifier.h
+++ b/include/linux/platform/tegra/ptp-notifier.h
@@ -21,7 +21,7 @@
 
 #if IS_ENABLED(CONFIG_TEGRA_PTP_NOTIFIER)
 /* register / unregister HW time source */
-void tegra_register_hwtime_source(u64 (*func)(void));
+void tegra_register_hwtime_source(u64 (*func)(void *), void *data);
 void tegra_unregister_hwtime_source(void);
 
 /* clients registering / unregistering for time update events */
@@ -41,7 +41,8 @@ u64 get_ptp_hwtime(void);
 #else /* CONFIG_TEGRA_PTP_NOTIFIER */
 
 /* register / unregister HW time source */
-static inline void tegra_register_hwtime_source(u64 (*func)(void))
+static inline void tegra_register_hwtime_source(u64 (*func)(void *),
+                                                void *data)
 {
 }