From: Benson Leung <bleung@chromium.org>
Date: Fri, 29 Jan 2021 06:14:01 +0000 (-0800)
Subject: usb: typec: Standardize PD Revision format with Type-C Revision
X-Git-Tag: v5.15~1778^2~58
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1ed8459d8f1060c87c7d66fe2d3cbbe4bc9cdd24;p=platform%2Fkernel%2Flinux-starfive.git

usb: typec: Standardize PD Revision format with Type-C Revision

The Type-C Revision was in a specific BCD format "0120H" for 1.2.
USB PD revision numbers follow a similar pattern with "0300H" for 3.0.

Standardizes the sysfs format for usb_power_delivery_revision
to align with the BCD format used for usb_typec_revision.

Example values:
- "2.0": USB Power Delivery Release 2.0
- "3.0": USB Power Delivery Release 3.0
- "3.1": USB Power Delivery Release 3.1

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Benson Leung <bleung@chromium.org>
Link: https://lore.kernel.org/r/20210129061406.2680146-2-bleung@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/Documentation/ABI/testing/sysfs-class-typec b/Documentation/ABI/testing/sysfs-class-typec
index 8eab41e..b614805 100644
--- a/Documentation/ABI/testing/sysfs-class-typec
+++ b/Documentation/ABI/testing/sysfs-class-typec
@@ -105,7 +105,12 @@ Date:		April 2017
 Contact:	Heikki Krogerus <heikki.krogerus@linux.intel.com>
 Description:
 		Revision number of the supported USB Power Delivery
-		specification, or 0 when USB Power Delivery is not supported.
+		specification, or 0.0 when USB Power Delivery is not supported.
+
+		Example values:
+		- "2.0": USB Power Delivery Release 2.0
+		- "3.0": USB Power Delivery Release 3.0
+		- "3.1": USB Power Delivery Release 3.1
 
 What:		/sys/class/typec/<port>/usb_typec_revision
 Date:		April 2017
diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index 8f77669..4f60ee7b 100644
--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -1500,8 +1500,9 @@ static ssize_t usb_power_delivery_revision_show(struct device *dev,
 						char *buf)
 {
 	struct typec_port *p = to_typec_port(dev);
+	u16 rev = p->cap->pd_revision;
 
-	return sprintf(buf, "%d\n", (p->cap->pd_revision >> 8) & 0xff);
+	return sprintf(buf, "%d.%d\n", (rev >> 8) & 0xff, (rev >> 4) & 0xf);
 }
 static DEVICE_ATTR_RO(usb_power_delivery_revision);