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greybus: greybus_protocols.h Add SVC_TIMESYNC_WAKE_PINS_ACQUIRE/RELEASE 

Its necessary to establish an initial state on the wake-detect lines before
enabling timesync on APB/GPB in order to ensure all GPIO edge-transitions are
correctly interpreted by the receiving processor.

This patch adds the operations defined in the Greybus specification to
greybus_protocols.h, this involves adding the
SVC_TIMESYNC_WAKE_PINS_ACQUIRE and SVC_TIMESYNC_WAKE_PINS_RELEASE commands
and moving the 'strobe_mask' parameter from 'struct
gb_svc_timesync_enable_request' to 'struct
gb_svc_timesync_wd_pins_acquire_request' since the communication of the
strobe_mask will be communicated before preparing any of the bridges to
receive the TimeSync pulses.

A separate patch to the greybus specification describes the transition
between the wake sub-state and the timesync sub-state.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Bryan O'Donoghue 2016-05-05 15:34:55 +01:00 committed by Greg Kroah-Hartman
parent 5015d5cff9
commit 596e4a1933
1 changed files with 11 additions and 1 deletions
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12
drivers/staging/greybus/greybus_protocols.h
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@ -835,6 +835,8 @@ struct gb_spi_transfer_response {
#define GB_SVC_TYPE_PWRMON_RAIL_NAMES_GET 0x15
#define GB_SVC_TYPE_PWRMON_SAMPLE_GET 0x16
#define GB_SVC_TYPE_PWRMON_INTF_SAMPLE_GET 0x17
#define GB_SVC_TYPE_TIMESYNC_WAKE_PINS_ACQUIRE 0x18
#define GB_SVC_TYPE_TIMESYNC_WAKE_PINS_RELEASE 0x19
#define GB_SVC_TYPE_MODULE_INSERTED 0x1f
#define GB_SVC_TYPE_MODULE_REMOVED 0x20
#define GB_SVC_TYPE_INTF_ACTIVATE 0x27
@ -955,7 +957,6 @@ struct gb_svc_timesync_enable_request {
__u8 count;
__le64 frame_time;
__le32 strobe_delay;
__le32 strobe_mask;
__le32 refclk;
} __packed;
/* timesync enable response has no payload */
@ -965,6 +966,15 @@ struct gb_svc_timesync_authoritative_response {
__le64 frame_time[GB_TIMESYNC_MAX_STROBES];
};
struct gb_svc_timesync_wake_pins_acquire_request {
__le32 strobe_mask;
};
/* timesync wake pins acquire response has no payload */
/* timesync wake pins release request has no payload */
/* timesync wake pins release response has no payload */
#define GB_SVC_UNIPRO_FAST_MODE 0x01
#define GB_SVC_UNIPRO_SLOW_MODE 0x02
#define GB_SVC_UNIPRO_FAST_AUTO_MODE 0x04