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Commit 88a3011e authored by Georgi Dobrev's avatar Georgi Dobrev Committed by Akash Choudhari
Browse files

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: default avatarGeorgi Dobrev <dobrev_georgi@projectara.com>
parent d9984cf0

drivers/staging/greybus/greybus_protocols.h

+1 −0
Original line number Diff line number Diff line
@@ -798,6 +798,7 @@ struct gb_spi_transfer_response { 
#define GB_SVC_TYPE_INTF_EJECT			0x11

#define GB_SVC_TYPE_KEY_EVENT			0x12

#define GB_SVC_TYPE_PING			0x13

#define GB_SVC_TYPE_PWR_DOWN			0x1d



/*

 * SVC version request/response has the same payload as

drivers/staging/greybus/svc.c

+28 −0
Original line number Diff line number Diff line
@@ -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;

drivers/staging/greybus/svc.h

+1 −0
Original line number Diff line number Diff line
@@ -71,6 +71,7 @@ void gb_svc_watchdog_destroy(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_disable(struct gb_svc *svc);

int gb_svc_pwr_off(struct gb_svc *svc);



int gb_svc_protocol_init(void);

void gb_svc_protocol_exit(void);