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author | Bryan O'Donoghue <bryan.odonoghue@linaro.org> | 2016-06-05 14:03:26 +0100 |
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committer | Greg Kroah-Hartman <gregkh@google.com> | 2016-06-06 20:37:47 -0700 |
commit | 970dc85bd95d931def5926ae81b5aa84ef14fb7c (patch) | |
tree | 8e95aa6ef752c8b2bd6afd39aaad1b54e0c16123 /drivers/staging/greybus/interface.h | |
parent | 698282f659d7c657aad4e0a72ed33190f2332e04 (diff) | |
download | op-kernel-dev-970dc85bd95d931def5926ae81b5aa84ef14fb7c.zip op-kernel-dev-970dc85bd95d931def5926ae81b5aa84ef14fb7c.tar.gz |
greybus: timesync: Add timesync core driver
This patch adds the core timesync functionality.
0. arche-platform.c/arche-apb-ctrl.c
Modifies the platform layer to hook the incoming TIME_SYNC signal up to
the timesync strobe IRQ handler. If the arche-platform driver can't
satisfy the request for the wake-detect line, it will return -EAGAIN and
the calling work-queue must reschedule the attempt to get exclusive
access to the wake-detect pin logic. A private data field is added to
the arche-platform driver to enable passing of a timesync pointer to the
ISR responsible for synchronizing time.
1. timesync.c
A new file added which contains all of the logic associated with sending
greybus commands to SVC, APBx or Interfaces to enable, disable and
disseminate timing information.
2. timesync_platform.c
Any platform/arch specific code goes into timesync_platform.c.
Originally the idea was to keep the x86 and ARM arch dependencies in a
timesync_platform_arch.c file - however with further refinement that's
currently not necessary however just-in-case it becomes necessary to
resuscitate arch or platform specific methods for accessing timer
resources that access shouldn't be part of the core timesync.c logic and
so for the moment we access these timer resources through a thin access
layer in timesync_platform.c. Expect this to go away long term ideally.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Acked-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Diffstat (limited to 'drivers/staging/greybus/interface.h')
-rw-r--r-- | drivers/staging/greybus/interface.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/staging/greybus/interface.h b/drivers/staging/greybus/interface.h index 603f146..8796c55 100644 --- a/drivers/staging/greybus/interface.h +++ b/drivers/staging/greybus/interface.h @@ -58,6 +58,11 @@ int gb_interface_activate(struct gb_interface *intf); void gb_interface_deactivate(struct gb_interface *intf); int gb_interface_enable(struct gb_interface *intf); void gb_interface_disable(struct gb_interface *intf); +int gb_interface_timesync_enable(struct gb_interface *intf, u8 count, + u64 frame_time, u32 strobe_delay, u32 refclk); +int gb_interface_timesync_authoritative(struct gb_interface *intf, + u64 *frame_time); +int gb_interface_timesync_disable(struct gb_interface *intf); int gb_interface_add(struct gb_interface *intf); void gb_interface_del(struct gb_interface *intf); void gb_interface_put(struct gb_interface *intf); |