linux-kernel - [PATCH 3/3] usb: typec: tcpm: Get Sink VDO from fwnode

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Message-Id: <20210126084544.682641-4-kyletso@google.com>
Date:   Tue, 26 Jan 2021 16:45:44 +0800
From:   Kyle Tso <kyletso@...gle.com>
To:     linux@...ck-us.net, heikki.krogerus@...ux.intel.com,
        gregkh@...uxfoundation.org, robh+dt@...nel.org,
        hdegoede@...hat.com, badhri@...gle.com
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Kyle Tso <kyletso@...gle.com>
Subject: [PATCH 3/3] usb: typec: tcpm: Get Sink VDO from fwnode

Current design only allows TCPM to get the Sink VDO from TCPC configs.
Add an additional way from fwnode.

Signed-off-by: Kyle Tso <kyletso@...gle.com>
---
 drivers/usb/typec/tcpm/tcpm.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index c14cf7842520..7b797d14d9db 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -5673,6 +5673,18 @@ static int tcpm_fw_get_caps(struct tcpm_port *port,
 			port->new_source_frs_current = frs_current;
 	}
 
+	ret = fwnode_property_read_u32_array(fwnode, "sink-vdos", NULL, 0);
+	if (ret <= 0 && ret != -EINVAL) {
+		return -EINVAL;
+	} else if (ret > 0) {
+		port->nr_snk_vdo = min(ret, VDO_MAX_OBJECTS);
+		ret = fwnode_property_read_u32_array(fwnode, "sink-vdos",
+						     port->snk_vdo,
+						     port->nr_snk_vdo);
+		if (ret < 0)
+			return -EINVAL;
+	}
+
 	return 0;
 }
 
-- 
2.30.0.280.ga3ce27912f-goog