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From:   Abdel Alkuor <alkuor@gmail.com>
To:     heikki.krogerus@linux.intel.com, krzysztof.kozlowski+dt@linaro.org,
        bryan.odonoghue@linaro.org
Cc:     gregkh@linuxfoundation.org, robh+dt@kernel.org,
        linux-usb@vger.kernel.org, devicetree@vger.kernel.org,
        conor+dt@kernel.org, linux-kernel@vger.kernel.org,
        abdelalkuor@geotab.com
Subject: [PATCH v5 10/15] USB: typec: Add port registration for tps25750
Date:   Sun, 17 Sep 2023 11:26:34 -0400
Message-Id: <20230917152639.21443-11-alkuor@gmail.com>
In-Reply-To: <20230917152639.21443-1-alkuor@gmail.com>
References: <20230917152639.21443-1-alkuor@gmail.com>
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From: Abdel Alkuor <abdelalkuor@geotab.com>

TPS25750 doesn't have system configuration register to get dr/pr of the
current applied binary configuration.

Get data role from the device node and power role from PD status register.

Signed-off-by: Abdel Alkuor <abdelalkuor@geotab.com>
---
 drivers/usb/typec/tipd/core.c     | 61 ++++++++++++++++++++++++++++++-
 drivers/usb/typec/tipd/tps6598x.h | 10 +++++
 2 files changed, 70 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
index 8218d88a4a06..a97fda68cb54 100644
--- a/drivers/usb/typec/tipd/core.c
+++ b/drivers/usb/typec/tipd/core.c
@@ -39,6 +39,7 @@
 #define TPS_REG_CTRL_CONF		0x29
 #define TPS_REG_BOOT_STATUS		0x2D
 #define TPS_REG_POWER_STATUS		0x3f
+#define TPS_REG_PD_STATUS		0x40
 #define TPS_REG_RX_IDENTITY_SOP		0x48
 #define TPS_REG_DATA_STATUS		0x5f
 
@@ -1028,6 +1029,60 @@ tps6598x_register_port(struct tps6598x *tps, struct fwnode_handle *fwnode)
 	return 0;
 }
 
+static int
+tps25750_register_port(struct tps6598x *tps, struct fwnode_handle *fwnode)
+{
+	struct typec_capability typec_cap = { };
+	const char *data_role;
+	u8 pd_status;
+	int ret;
+
+	ret = tps6598x_read8(tps, TPS_REG_PD_STATUS, &pd_status);
+	if (ret)
+		return ret;
+
+	ret = fwnode_property_read_string(fwnode, "data-role", &data_role);
+	if (ret) {
+		dev_err(tps->dev, "data-role not found: %d\n", ret);
+		return ret;
+	}
+
+	ret = typec_find_port_data_role(data_role);
+	if (ret < 0) {
+		dev_err(tps->dev, "unknown data-role: %s\n", data_role);
+		return ret;
+	}
+
+	typec_cap.data = ret;
+	typec_cap.revision = USB_TYPEC_REV_1_3;
+	typec_cap.pd_revision = 0x300;
+	typec_cap.driver_data = tps;
+	typec_cap.ops = &tps6598x_ops;
+	typec_cap.fwnode = fwnode;
+	typec_cap.prefer_role = TYPEC_NO_PREFERRED_ROLE;
+
+	switch (TPS_PD_STATUS_PORT_TYPE(pd_status)) {
+	case TPS_PD_STATUS_PORT_TYPE_SINK_SOURCE:
+	case TPS_PD_STATUS_PORT_TYPE_SOURCE_SINK:
+		typec_cap.type = TYPEC_PORT_DRP;
+		break;
+	case TPS_PD_STATUS_PORT_TYPE_SINK:
+		typec_cap.type = TYPEC_PORT_SNK;
+		break;
+	case TPS_PD_STATUS_PORT_TYPE_SOURCE:
+		typec_cap.type = TYPEC_PORT_SRC;
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	tps->port = typec_register_port(tps->dev, &typec_cap);
+	if (IS_ERR(tps->port))
+		return PTR_ERR(tps->port);
+
+	return 0;
+}
+
 static int tps6598x_probe(struct i2c_client *client)
 {
 	irq_handler_t irq_handler = tps6598x_interrupt;
@@ -1124,7 +1179,11 @@ static int tps6598x_probe(struct i2c_client *client)
 	if (ret)
 		goto err_role_put;
 
-	ret = tps6598x_register_port(tps, fwnode);
+	if (np && of_device_is_compatible(np, "ti,tps25750"))
+		ret = tps25750_register_port(tps, fwnode);
+	else
+		ret = tps6598x_register_port(tps, fwnode);
+
 	if (ret)
 		goto err_role_put;
 
diff --git a/drivers/usb/typec/tipd/tps6598x.h b/drivers/usb/typec/tipd/tps6598x.h
index 362e1eca53ad..d2c65387994f 100644
--- a/drivers/usb/typec/tipd/tps6598x.h
+++ b/drivers/usb/typec/tipd/tps6598x.h
@@ -203,4 +203,14 @@
 #define TPS_BOOT_STATUS_DEAD_BATTERY_FLAG	BIT(2)
 #define TPS25750_BOOT_STATUS_I2C_EEPROM_PRESENT	BIT(3)
 
+/* PD STATUS REG */
+#define TPS_REG_PD_STATUS_PORT_TYPE_MASK	GENMASK(5, 4)
+#define TPS_PD_STATUS_PORT_TYPE(x) \
+	TPS_FIELD_GET(TPS_REG_PD_STATUS_PORT_TYPE_MASK, x)
+
+#define TPS_PD_STATUS_PORT_TYPE_SINK_SOURCE	0
+#define TPS_PD_STATUS_PORT_TYPE_SINK		1
+#define TPS_PD_STATUS_PORT_TYPE_SOURCE		2
+#define TPS_PD_STATUS_PORT_TYPE_SOURCE_SINK	3
+
 #endif /* __TPS6598X_H__ */
-- 
2.34.1