linux-kernel - [PATCH v2 3/6] usb: typec: tcpci_rt1711h: Add regulator support when source vbus

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Date:   Thu, 21 Jul 2022 14:11:41 +0800
From:   Gene Chen <gene.chen.richtek@...il.com>
To:     linux@...ck-us.net, heikki.krogerus@...ux.intel.com,
        gregkh@...uxfoundation.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, gene_chen@...htek.com,
        cy_huang@...htek.com
Subject: [PATCH v2 3/6] usb: typec: tcpci_rt1711h: Add regulator support when source vbus

From: Gene Chen <gene_chen@...htek.com>

Add regulator support when source vbus

Signed-off-by: Gene Chen <gene_chen@...htek.com>
---
 drivers/usb/typec/tcpm/tcpci_rt1711h.c | 28 ++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/drivers/usb/typec/tcpm/tcpci_rt1711h.c b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
index 3309ceace2b2..52c9594e531d 100644
--- a/drivers/usb/typec/tcpm/tcpci_rt1711h.c
+++ b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
@@ -10,6 +10,7 @@
 #include <linux/i2c.h>
 #include <linux/interrupt.h>
 #include <linux/gpio/consumer.h>
+#include <linux/regulator/consumer.h>
 #include <linux/usb/tcpm.h>
 #include <linux/regmap.h>
 #include "tcpci.h"
@@ -40,6 +41,8 @@ struct rt1711h_chip {
 	struct tcpci_data data;
 	struct tcpci *tcpci;
 	struct device *dev;
+	struct regulator *vbus;
+	bool src_en;
 };
 
 static int rt1711h_read16(struct rt1711h_chip *chip, unsigned int reg, u16 *val)
@@ -103,6 +106,26 @@ static int rt1711h_init(struct tcpci *tcpci, struct tcpci_data *tdata)
 
 	/* dcSRC.DRP : 33% */
 	return rt1711h_write16(chip, RT1711H_RTCTRL16, 330);
+
+}
+
+static int rt1711h_set_vbus(struct tcpci *tcpci, struct tcpci_data *tdata,
+			    bool src, bool snk)
+{
+	struct rt1711h_chip *chip = tdata_to_rt1711h(tdata);
+	int ret;
+
+	if (chip->src_en == src)
+		return 1;
+
+	if (src)
+		ret = regulator_enable(chip->vbus);
+	else
+		ret = regulator_disable(chip->vbus);
+
+	if (!ret)
+		chip->src_en = src;
+	return ret ? ret : 1;
 }
 
 static int rt1711h_set_vconn(struct tcpci *tcpci, struct tcpci_data *tdata,
@@ -246,7 +269,12 @@ static int rt1711h_probe(struct i2c_client *client,
 	if (ret < 0)
 		return ret;
 
+	chip->vbus = devm_regulator_get(&client->dev, "vbus");
+	if (IS_ERR(chip->vbus))
+		return PTR_ERR(chip->vbus);
+
 	chip->data.init = rt1711h_init;
+	chip->data.set_vbus = rt1711h_set_vbus;
 	chip->data.set_vconn = rt1711h_set_vconn;
 	chip->data.start_drp_toggling = rt1711h_start_drp_toggling;
 	chip->tcpci = tcpci_register_port(chip->dev, &chip->data);
-- 
2.25.1