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Date: Wed, 6 Apr 2022 17:42:22 +0800
From: Li Jun <jun.li@....com>
To: myungjoo.ham@...sung.com, cw00.choi@...sung.com, krzk@...nel.org
Cc: linux-kernel@...r.kernel.org, frank.li@....com, xu.yang_2@....com
Subject: [PATCH] extcon: ptn5150: add usb role class support
Add support of usb role class consumer to do role switch.
Signed-off-by: Li Jun <jun.li@....com>
---
drivers/extcon/Kconfig | 1 +
drivers/extcon/extcon-ptn5150.c | 39 +++++++++++++++++++++++++++++++++
2 files changed, 40 insertions(+)
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index 0d42e49105dd..9828ade787a8 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -132,6 +132,7 @@ config EXTCON_PTN5150
tristate "NXP PTN5150 CC LOGIC USB EXTCON support"
depends on I2C && (GPIOLIB || COMPILE_TEST)
select REGMAP_I2C
+ select USB_ROLE_SWITCH
help
Say Y here to enable support for USB peripheral and USB host
detection by NXP PTN5150 CC (Configuration Channel) logic chip.
diff --git a/drivers/extcon/extcon-ptn5150.c b/drivers/extcon/extcon-ptn5150.c
index 5b9a3cf8df26..821b0f390308 100644
--- a/drivers/extcon/extcon-ptn5150.c
+++ b/drivers/extcon/extcon-ptn5150.c
@@ -17,6 +17,7 @@
#include <linux/slab.h>
#include <linux/extcon-provider.h>
#include <linux/gpio/consumer.h>
+#include <linux/usb/role.h>
/* PTN5150 registers */
#define PTN5150_REG_DEVICE_ID 0x01
@@ -52,6 +53,7 @@ struct ptn5150_info {
int irq;
struct work_struct irq_work;
struct mutex mutex;
+ struct usb_role_switch *role_sw;
};
/* List of detectable cables */
@@ -85,6 +87,12 @@ static void ptn5150_check_state(struct ptn5150_info *info)
extcon_set_state_sync(info->edev, EXTCON_USB_HOST, false);
gpiod_set_value_cansleep(info->vbus_gpiod, 0);
extcon_set_state_sync(info->edev, EXTCON_USB, true);
+
+ ret = usb_role_switch_set_role(info->role_sw, USB_ROLE_DEVICE);
+ if (ret)
+ dev_err(info->dev, "failed to set device role: %d\n",
+ ret);
+
break;
case PTN5150_UFP_ATTACHED:
extcon_set_state_sync(info->edev, EXTCON_USB, false);
@@ -95,6 +103,12 @@ static void ptn5150_check_state(struct ptn5150_info *info)
gpiod_set_value_cansleep(info->vbus_gpiod, 1);
extcon_set_state_sync(info->edev, EXTCON_USB_HOST, true);
+
+ ret = usb_role_switch_set_role(info->role_sw, USB_ROLE_HOST);
+ if (ret)
+ dev_err(info->dev, "failed to set host role: %d\n",
+ ret);
+
break;
default:
break;
@@ -133,6 +147,13 @@ static void ptn5150_irq_work(struct work_struct *work)
extcon_set_state_sync(info->edev,
EXTCON_USB, false);
gpiod_set_value_cansleep(info->vbus_gpiod, 0);
+
+ ret = usb_role_switch_set_role(info->role_sw,
+ USB_ROLE_NONE);
+ if (ret)
+ dev_err(info->dev,
+ "failed to set none role: %d\n",
+ ret);
}
}
@@ -194,6 +215,14 @@ static int ptn5150_init_dev_type(struct ptn5150_info *info)
return 0;
}
+static void ptn5150_put_role_sw(void *data)
+{
+ struct ptn5150_info *info = data;
+
+ cancel_work_sync(&info->irq_work);
+ usb_role_switch_put(info->role_sw);
+}
+
static int ptn5150_i2c_probe(struct i2c_client *i2c)
{
struct device *dev = &i2c->dev;
@@ -284,6 +313,16 @@ static int ptn5150_i2c_probe(struct i2c_client *i2c)
if (ret)
return -EINVAL;
+ info->role_sw = usb_role_switch_get(info->dev);
+ if (IS_ERR(info->role_sw))
+ return PTR_ERR(info->role_sw);
+
+ if (info->role_sw) {
+ ret = devm_add_action_or_reset(dev, ptn5150_put_role_sw, info);
+ if (ret)
+ return ret;
+ }
+
/*
* Update current extcon state if for example OTG connection was there
* before the probe
--
2.25.1
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