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>
This commit is contained in:
Georgi Dobrev 2016-03-24 13:37:21 +02:00 коммит произвёл Akash Choudhari
Родитель d9984cf0f2
Коммит 88a3011e91
3 изменённых файлов: 30 добавлений и 0 удалений

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@ -798,6 +798,7 @@ struct gb_spi_transfer_response {
#define GB_SVC_TYPE_INTF_EJECT 0x11 #define GB_SVC_TYPE_INTF_EJECT 0x11
#define GB_SVC_TYPE_KEY_EVENT 0x12 #define GB_SVC_TYPE_KEY_EVENT 0x12
#define GB_SVC_TYPE_PING 0x13 #define GB_SVC_TYPE_PING 0x13
#define GB_SVC_TYPE_PWR_DOWN 0x1d
/* /*
* SVC version request/response has the same payload as * SVC version request/response has the same payload as

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@ -99,11 +99,31 @@ static ssize_t watchdog_store(struct device *dev,
} }
static DEVICE_ATTR_RW(watchdog); 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[] = { static struct attribute *svc_attrs[] = {
&dev_attr_endo_id.attr, &dev_attr_endo_id.attr,
&dev_attr_ap_intf_id.attr, &dev_attr_ap_intf_id.attr,
&dev_attr_intf_eject.attr, &dev_attr_intf_eject.attr,
&dev_attr_watchdog.attr, &dev_attr_watchdog.attr,
&dev_attr_pwr_off.attr,
NULL, NULL,
}; };
ATTRIBUTE_GROUPS(svc); ATTRIBUTE_GROUPS(svc);
@ -320,6 +340,14 @@ int gb_svc_ping(struct gb_svc *svc)
} }
EXPORT_SYMBOL_GPL(gb_svc_ping); 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) static int gb_svc_version_request(struct gb_operation *op)
{ {
struct gb_connection *connection = op->connection; struct gb_connection *connection = op->connection;

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@ -71,6 +71,7 @@ void gb_svc_watchdog_destroy(struct gb_svc *svc);
bool gb_svc_watchdog_enabled(struct gb_svc *svc); bool gb_svc_watchdog_enabled(struct gb_svc *svc);
int gb_svc_watchdog_enable(struct gb_svc *svc); int gb_svc_watchdog_enable(struct gb_svc *svc);
int gb_svc_watchdog_disable(struct gb_svc *svc); int gb_svc_watchdog_disable(struct gb_svc *svc);
int gb_svc_pwr_off(struct gb_svc *svc);
int gb_svc_protocol_init(void); int gb_svc_protocol_init(void);
void gb_svc_protocol_exit(void); void gb_svc_protocol_exit(void);