From e7e2efc438ba721000ed4b747f159e41571570a7 Mon Sep 17 00:00:00 2001 From: Bryan O'Donoghue Date: Thu, 15 Oct 2015 16:10:42 +0100 Subject: [PATCH] greybus: connection: add latency tag enable/disable callbacks This patch adds a layered wrapper around optional latency tag enable/disable commands to APBridge. When set APBridge and GPBridge will insert timing information into reserved fields in the loopback response header. Correspondingly when unset no timing information will be included in the response payload. Signed-off-by: Bryan O'Donoghue Signed-off-by: Greg Kroah-Hartman --- drivers/staging/greybus/connection.c | 32 ++++++++++++++++++++++++++++ drivers/staging/greybus/connection.h | 3 +++ 2 files changed, 35 insertions(+) diff --git a/drivers/staging/greybus/connection.c b/drivers/staging/greybus/connection.c index 743ea67d022f..3b731dab81f0 100644 --- a/drivers/staging/greybus/connection.c +++ b/drivers/staging/greybus/connection.c @@ -527,6 +527,38 @@ void gb_connection_destroy(struct gb_connection *connection) device_unregister(&connection->dev); } +void gb_connection_latency_tag_enable(struct gb_connection *connection) +{ + struct greybus_host_device *hd = connection->hd; + int ret; + + if (!hd->driver->latency_tag_enable) + return; + + ret = hd->driver->latency_tag_enable(hd, connection->hd_cport_id); + if (ret) { + dev_err(&connection->dev, + "failed to enable latency tag: %d\n", ret); + } +} +EXPORT_SYMBOL_GPL(gb_connection_latency_tag_enable); + +void gb_connection_latency_tag_disable(struct gb_connection *connection) +{ + struct greybus_host_device *hd = connection->hd; + int ret; + + if (!hd->driver->latency_tag_disable) + return; + + ret = hd->driver->latency_tag_disable(hd, connection->hd_cport_id); + if (ret) { + dev_err(&connection->dev, + "failed to disable latency tag: %d\n", ret); + } +} +EXPORT_SYMBOL_GPL(gb_connection_latency_tag_disable); + void gb_hd_connections_exit(struct greybus_host_device *hd) { struct gb_connection *connection; diff --git a/drivers/staging/greybus/connection.h b/drivers/staging/greybus/connection.h index 27ec5975bbe0..2eaf186ab60e 100644 --- a/drivers/staging/greybus/connection.h +++ b/drivers/staging/greybus/connection.h @@ -66,4 +66,7 @@ void greybus_data_rcvd(struct greybus_host_device *hd, u16 cport_id, int gb_connection_bind_protocol(struct gb_connection *connection); +void gb_connection_latency_tag_enable(struct gb_connection *connection); +void gb_connection_latency_tag_disable(struct gb_connection *connection); + #endif /* __CONNECTION_H */ -- 2.20.1