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 a sysfs attribute to expose these to userspace. Cc: Benson Leung <bleung@xxxxxxxxxxxx> Cc: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> Signed-off-by: Prashant Malani <pmalani@xxxxxxxxxxxx> --- NOTE: I didn't include Benson's Reviewed-by from v1, since this version introduced the sysfs_notify() call. 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 | 17 +++++++++++++++++ drivers/usb/typec/class.c | 11 +++++++++++ 2 files changed, 28 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-class-typec b/Documentation/ABI/testing/sysfs-class-typec index b834671522d6..16440a236b66 100644 --- a/Documentation/ABI/testing/sysfs-class-typec +++ b/Documentation/ABI/testing/sysfs-class-typec @@ -170,6 +170,14 @@ Description: will show 0 until Discover Identity command result becomes available. The value can be polled. +What: /sys/class/typec/<port>-partner/identity/product_type_vdo +Date: October 2020 +Contact: Prashant Malani <pmalani@xxxxxxxxxxxx> +Description: + Product Type VDOs part of Discover Identity command result. 3 values + are displayed (for the 3 possible Product Type VDOs), one per line. + The values will show 0s until Discover Identity command result becomes + available. The values can be polled. USB Type-C cable devices (eg. /sys/class/typec/port0-cable/) @@ -230,6 +238,15 @@ Description: will show 0 until Discover Identity command result becomes available. The value can be polled. +What: /sys/class/typec/<port>-cable/identity/product_type_vdo +Date: October 2020 +Contact: Prashant Malani <pmalani@xxxxxxxxxxxx> +Description: + Product Type VDOs part of Discover Identity command result. 3 values + are displayed (for the 3 possible Product Type VDOs), one per line. + The values will show 0s until Discover Identity command result becomes + available. The values can be polled. + USB Type-C port alternate mode devices. diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c index 35eec707cb51..37fa4501e75f 100644 --- a/drivers/usb/typec/class.c +++ b/drivers/usb/typec/class.c @@ -122,10 +122,20 @@ static ssize_t product_show(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR_RO(product); +static ssize_t product_type_vdo_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct usb_pd_identity *id = get_pd_identity(dev); + + return sprintf(buf, "0x%08x\n0x%08x\n0x%08x\n", id->vdo[0], id->vdo[1], id->vdo[2]); +} +static DEVICE_ATTR_RO(product_type_vdo); + 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_vdo.attr, NULL }; @@ -144,6 +154,7 @@ 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_vdo"); } /* ------------------------------------------------------------------------- */ -- 2.29.0.rc1.297.gfa9743e501-goog