A PD-capable device can return up to 3 Product Type VDOs as part of its
DiscoverIdentity Response (USB PD Spec, Rev 3.0, Version 2.0, Section
6.4.4.3.1). Add sysfs attributes to expose these to userspace.
Cc: Benson Leung <ble...@chromium.org>
Cc: Heikki Krogerus <heikki.kroge...@linux.intel.com>
Signed-off-by: Prashant Malani <pmal...@chromium.org>
Reviewed-by: Heikki Krogerus <heikki.kroge...@linux.intel.com>
---
Changes in v5:
- No changes.
Changes in v4:
- Added Reviewed-by tag from v3's review.
- Rebased on top of usb-next + Patch 1/2
Changes in v3:
- Split each product type VDO into a separate attribute.
- Changed sprintf() to sysfs_emit().
- Changed ABI documentation based on consolidation of identity VDO
descriptions in the previous patch (1/2).
Changes in v2:
- Added sysfs_notify() call for the attribute.
- Added description for the attribute in
Documentation/ABI/testing/sysfs-class-typec.
Documentation/ABI/testing/sysfs-class-typec | 24 +++++++++++++++
drivers/usb/typec/class.c | 33 +++++++++++++++++++++
2 files changed, 57 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-class-typec
b/Documentation/ABI/testing/sysfs-class-typec
index 88ffc14d4cd2..619c4c67432b 100644
--- a/Documentation/ABI/testing/sysfs-class-typec
+++ b/Documentation/ABI/testing/sysfs-class-typec
@@ -228,6 +228,30 @@ Description:
will show 0 until Discover Identity command result becomes
available. The value can be polled.
+What:
/sys/class/typec/<port>-{partner|cable}/identity/product_type_vdo1
+Date: October 2020
+Contact: Prashant Malani <pmal...@chromium.org>
+Description:
+ 1st Product Type VDO of Discover Identity command result.
+ The value will show 0 until Discover Identity command result
becomes
+ available and a valid Product Type VDO is returned.
+
+What:
/sys/class/typec/<port>-{partner|cable}/identity/product_type_vdo2
+Date: October 2020
+Contact: Prashant Malani <pmal...@chromium.org>
+Description:
+ 2nd Product Type VDO of Discover Identity command result.
+ The value will show 0 until Discover Identity command result
becomes
+ available and a valid Product Type VDO is returned.
+
+What:
/sys/class/typec/<port>-{partner|cable}/identity/product_type_vdo3
+Date: October 2020
+Contact: Prashant Malani <pmal...@chromium.org>
+Description:
+ 3rd Product Type VDO of Discover Identity command result.
+ The value will show 0 until Discover Identity command result
becomes
+ available and a valid Product Type VDO is returned.
+
USB Type-C port alternate mode devices.
diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index cb1362187a7c..df4478baf95b 100644
--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -124,10 +124,40 @@ static ssize_t product_show(struct device *dev, struct
device_attribute *attr,
}
static DEVICE_ATTR_RO(product);
+static ssize_t product_type_vdo1_show(struct device *dev, struct
device_attribute *attr,
+ char *buf)
+{
+ struct usb_pd_identity *id = get_pd_identity(dev);
+
+ return sysfs_emit(buf, "0x%08x\n", id->vdo[0]);
+}
+static DEVICE_ATTR_RO(product_type_vdo1);
+
+static ssize_t product_type_vdo2_show(struct device *dev, struct
device_attribute *attr,
+ char *buf)
+{
+ struct usb_pd_identity *id = get_pd_identity(dev);
+
+ return sysfs_emit(buf, "0x%08x\n", id->vdo[1]);
+}
+static DEVICE_ATTR_RO(product_type_vdo2);
+
+static ssize_t product_type_vdo3_show(struct device *dev, struct
device_attribute *attr,
+ char *buf)
+{
+ struct usb_pd_identity *id = get_pd_identity(dev);
+
+ return sysfs_emit(buf, "0x%08x\n", id->vdo[2]);
+}
+static DEVICE_ATTR_RO(product_type_vdo3);
+
static struct attribute *usb_pd_id_attrs[] = {
&dev_attr_id_header.attr,
&dev_attr_cert_stat.attr,
&dev_attr_product.attr,
+ &dev_attr_product_type_vdo1.attr,
+ &dev_attr_product_type_vdo2.attr,
+ &dev_attr_product_type_vdo3.attr,
NULL
};
@@ -146,6 +176,9 @@ static void typec_report_identity(struct device *dev)
sysfs_notify(&dev->kobj, "identity", "id_header");
sysfs_notify(&dev->kobj, "identity", "cert_stat");
sysfs_notify(&dev->kobj, "identity", "product");
+ sysfs_notify(&dev->kobj, "identity", "product_type_vdo1");
+ sysfs_notify(&dev->kobj, "identity", "product_type_vdo2");
+ sysfs_notify(&dev->kobj, "identity", "product_type_vdo3");
}
/* ------------------------------------------------------------------------- */
--
2.29.2.454.gaff20da3a2-goog
