[PATCH V2] usb: typec: Add sysfs node to show connector orientation

[Puma Hsu]

Export the Type-C connector orientation so that user space
can get this information.

Signed-off-by: Puma Hsu <puma...@google.com>
---
 Documentation/ABI/testing/sysfs-class-typec | 11 +++++++++++
 drivers/usb/typec/class.c                   | 18 ++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-class-typec 
b/Documentation/ABI/testing/sysfs-class-typec
index d7647b258c3c..b22f71801671 100644
--- a/Documentation/ABI/testing/sysfs-class-typec
+++ b/Documentation/ABI/testing/sysfs-class-typec
@@ -108,6 +108,17 @@ Contact:   Heikki Krogerus 
<heikki.kroge...@linux.intel.com>
 Description:
                Revision number of the supported USB Type-C specification.
 
+What:          /sys/class/typec/<port>/connector_orientation
+Date:          October 2019
+Contact:       Puma Hsu <puma...@google.com>
+Description:
+               Indicates which typec connector orientation is configured now.
+               cc1 is defined as "normal" and cc2 is defined as "reversed".
+
+               Valid value:
+               - unknown (nothing configured)
+               - normal (configured in cc1 side)
+               - reversed (configured in cc2 side)
 
 USB Type-C partner devices (eg. /sys/class/typec/port0-partner/)
 
diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index 94a3eda62add..911d06676aeb 100644
--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -1245,6 +1245,23 @@ static ssize_t usb_power_delivery_revision_show(struct 
device *dev,
 }
 static DEVICE_ATTR_RO(usb_power_delivery_revision);
 
+static const char * const typec_connector_orientation[] = {
+       [TYPEC_ORIENTATION_NONE]                = "unknown",
+       [TYPEC_ORIENTATION_NORMAL]              = "normal",
+       [TYPEC_ORIENTATION_REVERSE]             = "reversed",
+};
+
+static ssize_t connector_orientation_show(struct device *dev,
+                                               struct device_attribute *attr,
+                                               char *buf)
+{
+       struct typec_port *p = to_typec_port(dev);
+
+       return sprintf(buf, "%s\n",
+                      typec_connector_orientation[p->orientation]);
+}
+static DEVICE_ATTR_RO(connector_orientation);
+
 static struct attribute *typec_attrs[] = {
        &dev_attr_data_role.attr,
        &dev_attr_power_operation_mode.attr,
@@ -1255,6 +1272,7 @@ static struct attribute *typec_attrs[] = {
        &dev_attr_usb_typec_revision.attr,
        &dev_attr_vconn_source.attr,
        &dev_attr_port_type.attr,
+       &dev_attr_connector_orientation.attr,
        NULL,
 };
 ATTRIBUTE_GROUPS(typec);
-- 
2.23.0.866.gb869b98d4c-goog