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| author | Georgi Dobrev <dobrev_georgi@projectara.com> | 2016-03-24 13:37:21 +0200 |
|---|---|---|
| committer | Akash Choudhari <akashtc@google.com> | 2016-04-01 14:41:49 -0700 |
| commit | 88a3011e91f7c557798301d47f830320580795cf (patch) | |
| tree | b97ca845f74a2053459d96a8fe87c8619e5fd0be /drivers/staging/greybus/svc.c | |
| parent | d9984cf0f24860bc3a9d3c8f48d90a148827c5c6 (diff) | |
| download | op-kernel-dev-88a3011e91f7c557798301d47f830320580795cf.zip op-kernel-dev-88a3011e91f7c557798301d47f830320580795cf.tar.gz | |
greybus: Added a sysfs entry to power down the SVC
Added a sysfs entry called pwr_off. When a "1" is passed to it,
it sends a GB_SVC_TYPE_PWR_DOWN command to the SVC, powering it down
along with the switch and INA231 chips.
Testing Done: Tested on EVT1_5, works.
Signed-off-by: Georgi Dobrev <dobrev_georgi@projectara.com>
Diffstat (limited to 'drivers/staging/greybus/svc.c')
| -rw-r--r-- | drivers/staging/greybus/svc.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/staging/greybus/svc.c b/drivers/staging/greybus/svc.c index a19e575..f96c645 100644 --- a/drivers/staging/greybus/svc.c +++ b/drivers/staging/greybus/svc.c @@ -99,11 +99,31 @@ static ssize_t watchdog_store(struct device *dev, } static DEVICE_ATTR_RW(watchdog); +static ssize_t pwr_off_store(struct device *dev, + struct device_attribute *attr, const char *buf, + size_t len) +{ + struct gb_svc *svc = to_gb_svc(dev); + int retval; + bool user_request; + + retval = strtobool(buf, &user_request); + if (retval) { + return retval; + } + if (user_request) { + retval = gb_svc_pwr_off(svc); + } + return len; +} +static DEVICE_ATTR_WO(pwr_off); + static struct attribute *svc_attrs[] = { &dev_attr_endo_id.attr, &dev_attr_ap_intf_id.attr, &dev_attr_intf_eject.attr, &dev_attr_watchdog.attr, + &dev_attr_pwr_off.attr, NULL, }; ATTRIBUTE_GROUPS(svc); @@ -320,6 +340,14 @@ int gb_svc_ping(struct gb_svc *svc) } EXPORT_SYMBOL_GPL(gb_svc_ping); +int gb_svc_pwr_off(struct gb_svc *svc) +{ + return gb_operation_sync_timeout(svc->connection, GB_SVC_TYPE_PWR_DOWN, + NULL, 0, NULL, 0, + GB_OPERATION_TIMEOUT_DEFAULT * 2); +} +EXPORT_SYMBOL_GPL(gb_svc_pwr_off); + static int gb_svc_version_request(struct gb_operation *op) { struct gb_connection *connection = op->connection; |
