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authorRichard Cochran <richardcochran@gmail.com>2014-03-20 22:21:52 +0100
committerDavid S. Miller <davem@davemloft.net>2014-03-21 14:21:13 -0400
commit6092315dfdec5185881605d15a0e200d6e90eb66 (patch)
tree8b018970396a2e2380fe51ed14d2f860ce6010e1 /drivers/ptp/ptp_private.h
parenta85ae0e97879f51bccd8511668b07d346d98b3eb (diff)
downloadop-kernel-dev-6092315dfdec5185881605d15a0e200d6e90eb66.zip
op-kernel-dev-6092315dfdec5185881605d15a0e200d6e90eb66.tar.gz
ptp: introduce programmable pins.
This patch adds a pair of new ioctls to the PTP Hardware Clock device interface. Using the ioctls, user space programs can query each pin to find out its current function and also reprogram a different function if desired. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/ptp/ptp_private.h')
-rw-r--r--drivers/ptp/ptp_private.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/ptp/ptp_private.h b/drivers/ptp/ptp_private.h
index df03f2e..b114a84 100644
--- a/drivers/ptp/ptp_private.h
+++ b/drivers/ptp/ptp_private.h
@@ -48,6 +48,7 @@ struct ptp_clock {
long dialed_frequency; /* remembers the frequency adjustment */
struct timestamp_event_queue tsevq; /* simple fifo for time stamps */
struct mutex tsevq_mux; /* one process at a time reading the fifo */
+ struct mutex pincfg_mux; /* protect concurrent info->pin_config access */
wait_queue_head_t tsev_wq;
int defunct; /* tells readers to go away when clock is being removed */
};
@@ -69,6 +70,10 @@ static inline int queue_cnt(struct timestamp_event_queue *q)
* see ptp_chardev.c
*/
+/* caller must hold pincfg_mux */
+int ptp_set_pinfunc(struct ptp_clock *ptp, unsigned int pin,
+ enum ptp_pin_function func, unsigned int chan);
+
long ptp_ioctl(struct posix_clock *pc,
unsigned int cmd, unsigned long arg);
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