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authorLi Jun <jun.li@nxp.com>2022-04-19 20:44:09 +0800
committerChanwoo Choi <cw00.choi@samsung.com>2022-05-13 17:03:41 +0900
commit1bfcaa5700811117d845f081a1241dd59b885b6c (patch)
tree26defd0af4ad0fb5840eae8234ea8bfc7589c1b9 /drivers/extcon
parent782cd939cbe0f569197cd1c9b0477ee213167f04 (diff)
extcon: ptn5150: Add usb role class support
Some usb controller drivers may not support extcon but use usb role class as it's the preferred approach, so to support usb dual role switch with usb role class, add usb role class consumer support. Signed-off-by: Li Jun <jun.li@nxp.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'drivers/extcon')
-rw-r--r--drivers/extcon/Kconfig1
-rw-r--r--drivers/extcon/extcon-ptn5150.c25
2 files changed, 26 insertions, 0 deletions
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index 88a8b3d7d78a..dca7cecb37e3 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -131,6 +131,7 @@ config EXTCON_PALMAS
config EXTCON_PTN5150
tristate "NXP PTN5150 CC LOGIC USB EXTCON support"
depends on I2C && (GPIOLIB || COMPILE_TEST)
+ depends on USB_ROLE_SWITCH || !USB_ROLE_SWITCH
select REGMAP_I2C
help
Say Y here to enable support for USB peripheral and USB host
diff --git a/drivers/extcon/extcon-ptn5150.c b/drivers/extcon/extcon-ptn5150.c
index 2a7874108df8..017a07197f38 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 */
@@ -70,6 +72,7 @@ static const struct regmap_config ptn5150_regmap_config = {
static void ptn5150_check_state(struct ptn5150_info *info)
{
unsigned int port_status, reg_data, vbus;
+ enum usb_role usb_role = USB_ROLE_NONE;
int ret;
ret = regmap_read(info->regmap, PTN5150_REG_CC_STATUS, &reg_data);
@@ -85,6 +88,7 @@ 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);
+ usb_role = USB_ROLE_DEVICE;
break;
case PTN5150_UFP_ATTACHED:
extcon_set_state_sync(info->edev, EXTCON_USB, false);
@@ -95,10 +99,18 @@ 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);
+ usb_role = USB_ROLE_HOST;
break;
default:
break;
}
+
+ if (usb_role) {
+ ret = usb_role_switch_set_role(info->role_sw, usb_role);
+ if (ret)
+ dev_err(info->dev, "failed to set %s role: %d\n",
+ usb_role_string(usb_role), ret);
+ }
}
static void ptn5150_irq_work(struct work_struct *work)
@@ -133,6 +145,13 @@ 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);
}
}
@@ -199,6 +218,7 @@ static void ptn5150_work_sync_and_put(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)
@@ -291,6 +311,11 @@ 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 dev_err_probe(info->dev, PTR_ERR(info->role_sw),
+ "failed to get role switch\n");
+
ret = devm_add_action_or_reset(dev, ptn5150_work_sync_and_put, info);
if (ret)
return ret;