From 8f6244055bd33695ce28f6b9b454fc1ae05bcd9c Mon Sep 17 00:00:00 2001
From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Date: Wed, 14 Aug 2019 16:24:19 +0300
Subject: [PATCH] usb: typec: fusb302: Always provide fwnode for the port
Git-commit: 8f6244055bd33695ce28f6b9b454fc1ae05bcd9c
References: git-fixes
Patch-mainline: v5.4-rc1

By registering a software fwnode for the port when the
firmware does not supply one, we can always provide tcpm the
connector capabilities by using the common USB connector
device properties instead of using tcpc_config platform data.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20190814132419.39759-4-heikki.krogerus@linux.intel.com
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
 drivers/usb/typec/tcpm/fusb302.c |   70 ++++++++++++++++++++++-----------------
 1 file changed, 41 insertions(+), 29 deletions(-)

--- a/drivers/usb/typec/tcpm/fusb302.c
+++ b/drivers/usb/typec/tcpm/fusb302.c
@@ -75,7 +75,6 @@ struct fusb302_chip {
 	struct i2c_client *i2c_client;
 	struct tcpm_port *tcpm_port;
 	struct tcpc_dev tcpc_dev;
-	struct tcpc_config tcpc_config;
 
 	struct regulator *vbus;
 
@@ -1110,23 +1109,6 @@ done:
 	mutex_unlock(&chip->lock);
 }
 
-#define PDO_FIXED_FLAGS \
-	(PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP | PDO_FIXED_USB_COMM)
-
-static const u32 src_pdo[] = {
-	PDO_FIXED(5000, 400, PDO_FIXED_FLAGS),
-};
-
-static const struct tcpc_config fusb302_tcpc_config = {
-	.src_pdo = src_pdo,
-	.nr_src_pdo = ARRAY_SIZE(src_pdo),
-	.operating_snk_mw = 2500,
-	.type = TYPEC_PORT_DRP,
-	.data = TYPEC_PORT_DRD,
-	.default_role = TYPEC_SINK,
-	.alt_modes = NULL,
-};
-
 static void init_tcpc_dev(struct tcpc_dev *fusb302_tcpc_dev)
 {
 	fusb302_tcpc_dev->init = tcpm_init;
@@ -1670,6 +1652,9 @@ static int init_gpio(struct fusb302_chip
 	return 0;
 }
 
+#define PDO_FIXED_FLAGS \
+	(PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP | PDO_FIXED_USB_COMM)
+
 static int fusb302_composite_snk_pdo_array(struct fusb302_chip *chip)
 {
 	struct device *dev = chip->dev;
@@ -1693,6 +1678,35 @@ static int fusb302_composite_snk_pdo_arr
 	return 2;
 }
 
+static const u32 src_pdo[] = {
+	PDO_FIXED(5000, 400, PDO_FIXED_FLAGS)
+};
+
+static const u32 snk_pdo[] = {
+	PDO_FIXED(5000, 400, PDO_FIXED_FLAGS)
+};
+
+static const struct property_entry port_props[] = {
+	PROPERTY_ENTRY_STRING("data-role", "dual"),
+	PROPERTY_ENTRY_STRING("power-role", "dual"),
+	PROPERTY_ENTRY_STRING("try-power-role", "sink"),
+	PROPERTY_ENTRY_U32_ARRAY("source-pdos", src_pdo),
+	PROPERTY_ENTRY_U32_ARRAY("sink-pdos", snk_pdo),
+	PROPERTY_ENTRY_U32("op-sink-microwatt", 2500),
+	{ }
+};
+
+static struct fwnode_handle *fusb302_fwnode_get(struct device *dev)
+{
+	struct fwnode_handle *fwnode;
+
+	fwnode = device_get_named_child_node(dev, "connector");
+	if (!fwnode)
+		fwnode = fwnode_create_software_node(port_props, NULL);
+
+	return fwnode;
+}
+
 static int fusb302_probe(struct i2c_client *client,
 			 const struct i2c_device_id *id)
 {
@@ -1714,19 +1728,8 @@ static int fusb302_probe(struct i2c_clie
 
 	chip->i2c_client = client;
 	chip->dev = &client->dev;
-	chip->tcpc_config = fusb302_tcpc_config;
-	chip->tcpc_dev.config = &chip->tcpc_config;
 	mutex_init(&chip->lock);
 
-	chip->tcpc_dev.fwnode =
-		device_get_named_child_node(dev, "connector");
-
-	if (!device_property_read_u32(dev, "fcs,operating-sink-microwatt", &v))
-		chip->tcpc_config.operating_snk_mw = v / 1000;
-
-	/* Composite sink PDO */
-	chip->tcpc_config.nr_snk_pdo = fusb302_composite_snk_pdo_array(chip);
-	chip->tcpc_config.snk_pdo = chip->snk_pdo;
 
 	/*
 	 * Devicetree platforms should get extcon via phandle (not yet
@@ -1762,8 +1765,15 @@ static int fusb302_probe(struct i2c_clie
 			goto destroy_workqueue;
 	}
 
+	chip->tcpc_dev.fwnode = fusb302_fwnode_get(dev);
+	if (IS_ERR(chip->tcpc_dev.fwnode)) {
+		ret = PTR_ERR(chip->tcpc_dev.fwnode);
+		goto destroy_workqueue;
+	}
+
 	chip->tcpm_port = tcpm_register_port(&client->dev, &chip->tcpc_dev);
 	if (IS_ERR(chip->tcpm_port)) {
+		fwnode_handle_put(chip->tcpc_dev.fwnode);
 		ret = PTR_ERR(chip->tcpm_port);
 		if (ret != -EPROBE_DEFER)
 			dev_err(dev, "cannot register tcpm port, ret=%d", ret);
@@ -1785,6 +1795,7 @@ static int fusb302_probe(struct i2c_clie
 
 tcpm_unregister_port:
 	tcpm_unregister_port(chip->tcpm_port);
+	fwnode_handle_put(chip->tcpc_dev.fwnode);
 destroy_workqueue:
 	destroy_workqueue(chip->wq);
 
@@ -1800,6 +1811,7 @@ static int fusb302_remove(struct i2c_cli
 	cancel_work_sync(&chip->irq_work);
 	cancel_delayed_work_sync(&chip->bc_lvl_handler);
 	tcpm_unregister_port(chip->tcpm_port);
+	fwnode_handle_put(chip->tcpc_dev.fwnode);
 	destroy_workqueue(chip->wq);
 	fusb302_debugfs_exit(chip);